Agilent Technologies Stereo System 6632B User Manual

Service Manual

Agilent Model 66332A

Dynamic Measurement DC Source

and Agilent Model 6632B, 6633B, 6634B

System DC Power Supply

For instruments with Serial Numbers:

Agilent 66332A: US37470791 and up

Agilent 6632B: US37471966 and up

Agilent 6633B: US37470746 and up

Agilent 6634B: US37470655 and up

For instruments with higher serial numbers, a change page may be included.

Agilent Part No. 5962-8119

Microfiche No 6962-8120

Printed in U.S.A.

September, 2000

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Safety Summary

The following general safety precautions must be observed during all phases of operation of this instrument. Failure to comply

with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and

intended use of the instrument. Agilent Technologies assumes no liability for the customer's failure to comply with these

requirements.

WARNING

Servicing instructions are for use by service-trained personnel. To avoid dangerous electrical shock, do not perform any servicing

unless you are qualified to do so. Some procedures described in this manual are performed with power supplied to the instrument

while its protective covers are removed. If contacted, the energy available at many points may result in personal injury.

BEFORE APPLYING POWER.

Verify that the product is set to match the available line voltage, the correct line fuse is installed, and all safety precautions (see

following warnings) are taken. In addition, note the instrument's external markings described under "Safety Symbols"

GROUND THE INSTRUMENT.

Before switching on the instrument, the protective earth terminal of the instrument must be connected to the protective conductor

of the (mains) power cord. The mains plug shall be inserted only in an outlet socket that is provided with a protective earth

contact. This protective action must not be negated by the use of an extension cord (power cable) that is without a protective

conductor (grounding). Any interruption of the protective (grounding) conductor or disconnection of the protective earth

terminal will cause a potential shock hazard that could result in personal injury.

FUSES

Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be used. Do not use

repaired fuses or short-circuited fuseholders. To do so could cause a shock or fire hazard.

KEEP AWAY FROM LIVE CIRCUITS.

Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be made by

qualified service personnel. Do not replace components with power cable connected. Under certain conditions, dangerous

voltages may exist even with the power cable removed. To avoid injuries, always disconnect power, discharge circuits and

remove external voltage sources before touching components.

DO NOT SERVICE OR ADJUST ALONE.

Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.

Any adjustment, maintenance, and repair of this instrument while it is opened and under voltage should be avoided as much as

possible. When this is unavoidable, such adjustment, maintenance, and repair should be carried out only by a skilled person who

is aware of the hazard involved.

DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT.

Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification

to the instrument. Return the instrument to an Agilent Technologies Sales and Service Office for service and repair to ensure that

safety features are maintained.

SAFETY SYMBOLS

Refer to the table on the following page

WARNING The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if not

correctly performed or adhered to, could result in personal injury. Do not proceed beyond a WARNING sign

until the indicated conditions are fully understood and met.

Caution

The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which, if not

correctly performed or adhered to, could result in damage to or destruction of part or all of the product. Do

not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met.

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Safety Symbol Definitions

Description

Symbol

Direct current

Alternating current

Both direct and alternating current

Three-phase alternating current

Earth (ground) terminal

Protective earth (ground) terminal

Frame or chassis terminal

Terminal is at earth potential (Used for measurement and control circuits designed to be

operated with one terminal at earth potential.)

Terminal for Neutral conductor on permanently installed equipment

Terminal for Line conductor on permanently installed equipment

On (supply)

Off (supply)

Standby (supply)

Units with this symbol are not completely disconnected from ac mains when this switch

is off. To completely disconnect the unit from ac mains, either disconnect the power

cord or have a qualified electrician install an external switch.

In position of a bi-stable push control

Out position of a bi-stable push control

Caution, risk of electric shock

Caution, hot surface

Caution (refer to accompanying documents)

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Notice

The information contained in this document is subject to change without notice. Agilent Technologies makes no

warranty of any kind with regard to this material, including but not limited to, the implied warranties of

merchantability, and fitness for a particular purpose.

Agilent Technologies shall not be liable for errors contained herein or for incidental or consequential

damages in connection with the furnishing, performance or use of this material.

This document contains proprietary information which is protected by copyright. All rights are reserved. No part of

this document may be photocopied, reproduced, or translated into another language without the prior written consent

of Agilent Technologies, Inc.

Printing History

The edition and current revision of this manual are indicated below. Reprints of this manual containing minor

corrections and updates may have the same printing date. Revised editions are identified by a new printing date. A

revised edition incorporates all new or corrected material since the previous printing date.

Changes to the manual occurring between revisions are covered by change sheets shipped with the manual. In some

cases, the manual change applies only to specific instruments. Instructions provided on the change sheet will indicate

if a particular change applies only to certain instruments.

Edition 1...............................................................June, 1997

Edition 2...............................................................September, 2000

Instrument Identification

The power supply is identified by a unique serial number such as US36310101. The items in this serial number are

explained as follows:

US36310101

The first two letters indicate the country of manufacture. US = United States.

The next four digits are the year and week of manufacture or last significant design change. Add

1960 to the first two digits to determine the year. For example, 36=1996. The third and fourth

digits specify the week of the year (31 = the thirty-first week).

The last four digits (0101) are a unique number assigned to each unit.

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Table of Contents

Warranty Information

Safety Summary

Notice

Printing History

Instrument Identification

Table of Contents

INTRODUCTION

Organization

Safety Considerations

Related Documents

The following documents are shipped with your dc power supply:

a a User’s Guide, containing installation, operating, and calibration information

a a Programming Guide, containing detailed GPIB programming information.

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1 - Introduction

Revisions

Manual Revisions

This manual was written for dc power supplies that have the same manufacturing dates (the first four digits) as those

listed on the title page and whose unique identification number (the last four digits) are equal to or higher than those

listed in the title page.

NOTE:

If the first four digits of the serial number of your unit are higher than those shown in the title

page, your unit was made after the publication of this manual and may have hardware or firmware

differences not covered in this manual. If they are significant to the operation and/or servicing of

the dc power supply, those differences are documented in one or more Manual Change sheets

included with this manual.

Firmware Revisions

You can obtain the firmware revision number by either reading the integrated circuit label, or query the dc power

supply using the GPIB *IDN?' query command (See Chapter 3, ROM Upgrade).

Electrostatic Discharge

CAUTION:

The dc power supply has components that can be damaged by ESD (electrostatic discharge).

Failure to observe standard antistatic practices can result in serious degradation of performance,

even when an actual failure does not occur.

When working on the dc power supply, observe all standard, antistatic work practices. These include, but are not

limited to:

Working at a static-free station such as a table covered with static-dissipative laminate or with a conductive

table mat (Agilent P/N 9300-0797, or equivalent).

Using a conductive wrist strap, such as Agilent P/N 9300-0969 or 9300-0970.

Grounding all metal equipment at the station to a single common ground.

Connecting low-impedance test equipment to static-sensitive components only when those

components have power applied to them.

Removing power from the dc power supply before removing or installing printed circuit boards.

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Verification and Performance Tests

Introduction

This document contains test procedures to verify that the dc power supply is operating normally and is within

published specifications. There are three types of tests as follows:

Built-in Self Tests

These tests, run automatically when the power supply is turned on, check most

of the digital circuits and the programming and readback DACs.

Operation Verification These tests verify that the power supply is probably operating normally but do

not check all of the specified operating parameters.

Performance Tests

These tests check that the supply meets all of the operating specifications as

listed in the Operating Manual.

NOTE:

The dc power supply must pass the built-in self-tests before calibration or any of the verification

or performance tests can be performed. If the supply fails any of the tests or if abnormal test results

are obtained, refer to the troubleshooting procedures in Chapter 3. The troubleshooting procedures

will determine if repair and/or calibration is required.

Test Equipment Required

Table 2-1 lists the equipment required to perform the verification and performance tests. A test record sheet with

specification limits and measurement uncertainties (when test using the recommended test equipment) may be found

at the back of this section.

WARNING:

SHOCK HAZARD. These tests should only be performed by qualified personnel. During the

performance of these tests, hazardous voltages may be present at the output of the supply.

Table 2-1. Test Equipment Required for Verification and Performance Tests

Type

Specifications

Recommended Model

Current Monitor

Resistor

15 A (0.1 ohm) 0.04%,

for power supplies up to 15 A output

Guildline 9230/15

DC Power Supply

Digital Voltmeter

5 V, 10 A

Agilent 6642A, 6653A

Resolution: 10 nV @ 1V

Readout: 8 1/2 digits

Accuracy: 20 ppm

Agilent 3458A or equivalent

Electronic Load

GPIB Controller

20 V, 5 A minimum, with transient capability

Agilent 6060B or equivalent

HP Series 300 or other controller with full

GPIB capabilities

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2 - Verification and Performance Tests

Resistor

1 ohm, 50 W

Ohmite L50J1R0

(substitute for electronic 3 ohm, 100 W (Agilent 66332A/6632B)

load if load is too noisy 24 ohm, 100 W (Agilent 6633B)

Ohmite RLS5R0 (adjustable)

Ohmite RLS25R (adjustable)

Ohmite RLS100 (adjustable)

Agilent 0813-0001

for CC PARD test)

99 ohm, 100 W (Agilent 6634B)

1k ohm, 5%, 3W (all models)

Oscilloscope

Sensitivity: 1 mV

Agilent 54504A or equivalent

Bandwidth Limit: 20 MHz

Probe: 1:1 with RF tip

RMS Voltmeter

True RMS

Agilent 3400B or equivalent

Bandwidth: 20 MHz

Sensitivity: 100 µV

Variable-Voltage

Transformer

Adjustable to highest rated input voltage range.

Power: 500 VA

Measurement Techniques

Test Setup

Most tests are performed at the rear terminals of the supply as shown in Figure 2-1a. Measure the dc voltage directly

at the +S and -S terminals.

240 VDC MAX TO

-S

DVM, Scope, or

RMS voltmeter

(for CV tests)

Load

resistor

1 k

Ammeter

240 VDC MAX TO

DVM or

-S

Current

monitor

RMS voltmeter

(for CC tests)

Electronic

Load

resistor

1 k

Ammeter

Load

(see note)

Note: Use dc supply with same polarity

connections for - CC tests.

External

DC supply

Replace load with appropriate

resistor for CC noise test.

Figure 2-1. Test Setup

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Verification and Performance Tests - 2

Electronic Load

Many of the test procedures require the use of a variable load capable of dissipating the required power. If a variable

resistor is used, switches should be used to either; connect, disconnect, or short the load resistor. For most tests, an

electronic load can be used. The electronic load is considerably easier to use than load resistors, but it may not be

fast enough to test transient recovery time and may be too noisy for the noise (PARD) tests.

Fixed load resistors may be used in place of a variable load, with minor changes to the test procedures. Also, if

computer controlled test setups are used, the relatively slow (compared to computers and system voltmeters) settling

times and slew rates of the power supply may have to be taken into account. "Wait" statements can be used in the test

program if the test system is faster than the supply.

Current-Monitoring Resistor

To eliminate output-current measurement error caused by voltage drops in the leads and connections, connect the

current monitoring resistor between the -OUT and the load as a four-terminal device. Connect the current-monitoring

leads inside the load-lead connections directly at the monitoring points on the resistor element.

Operation Verification Tests

To assure that the supply is operating properly, without testing all specified parameters, perform the following test

procedures:

a. Perform the turn-on and checkout procedures given in the Operating Manual.

b. Perform the Voltage Programming and Readback Accuracy test, and the Current Programming and Readback

Accuracy tests from this procedure.

Performance Tests

NOTE:

A full Performance Test consists of only those items listed as “Specifications” in Table A-1 of the

Operating Manual, and that have a procedure in this document.

The following paragraphs provide test procedures for verifying the supply's compliance with the specifications listed

in Table A-1 of the Operating Manual. All of the performance test specifications and calculated measurement

uncertainties are entered in the appropriate Performance Test Record Card for your specific model. You can record

the actual measured values in the column provided in this card.

If you use equipment other than that recommended in Table 2-1, you must recalculate the measurement uncertainties

for the actual equipment used.

Programming

You can program the supply from the front panel keyboard or from a GPIB controller when performing the tests. The

test procedures are written assuming that you know how to program the supply either; remotely from a GPIB

controller or locally using the control keys and indicators on the supply's front panel. Complete instructions on

remote and local programming are given in the User’s Guide and in the Programming Guide. Programming ratings

are as follows:

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2 - Verification and Performance Tests

Table 2-2. Programming Ratings

Model

Voltage Rating

20 V

Full Scale Rating

20.020 V

Current Rating

Full Scale Rating

5.0045 A

Agilent

66332A/6632B

5 A

2 A

1 A

50 V

50.045 V

2.002 A

Agilent 6633B

Agilent 6634B

100 V

100.1 V

1.001 A

Constant Voltage (CV) Tests

CV Setup

If more than one meter or if a meter and an oscilloscope are used, connect each to the terminals by a separate pair of

leads to avoid mutual coupling effects. For constant voltage dc tests, connect only to +S and -S, since the unit

regulates the output voltage that appears between +S and -S, and not between the (+) and (-) output terminals. Use

coaxial cable or shielded two-wire cable to avoid noise pickup on the test leads.

Voltage Programming and Readback Accuracy

This test verifies that the voltage programming, GPIB readback and front panel display functions are within

specifications. Note that the values read back over the GPIB should be identical to those displayed on the front

panel.

a. Turn off the supply and connect a digital voltmeter between the +S and the -S terminals as shown in

Figure 2-1a.

b. Turn on the supply and program the supply to zero volts and the maximum programmable current with the load

off.

c. Record the output voltage readings on the digital voltmeter (DVM) and the front panel display. The readings

should be within the limits specified in the performance test record chart for the appropriate model under CV

PROGRAMMING @ 0 VOLTS. Also, note that the CV annunciator is on. The output current reading should be

approximately zero.

d. Program the output voltage to full-scale.

e. Record the output voltage readings on the DVM and the front panel display. The readings should be within the

limits specified in the performance test record chart for the appropriate model under CV PROGRAMMING @

FULL SCALE.

CV Load Effect

This test measures the change in output voltage resulting from a change in output current from full load to no load.

a. Turn off the supply and connect the output as shown in Figure 2-1a with the DVM connected between the +S

and -S terminals.

b. Turn on the supply and program the current to the maximum programmable value and the voltage to the full-

scale value.

c. Adjust the load for the full-scale current as indicated on the front panel display. The CV annunciator on the front

panel must be on. If it is not, adjust the load so that the output current drops slightly.

d. Record the output voltage reading on the DVM connected to +S and -S.

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Verification and Performance Tests - 2

e. Open the load and again record the DVM voltage reading. The difference between the DVM readings in steps

(d) and (e) is the load effect voltage, and should not exceed the value listed in the performance test record chart

for the appropriate model under CV LOAD EFFECT.

CV Source Effect

This test measures the change in output voltage that results from a change in ac line voltage from the minimum to

maximum value within the line voltage specifications.

a. Turn off the supply and connect the ac power line through a variable voltage transformer.

b. Connect the output as shown in Figure 2-1a with the DVM connected between the +S and the -S terminals. Set

the transformer to nominal line voltage.

c. Turn on the supply and program the current to the maximum programmable value and the output voltage to the

full-scale value .

d. Adjust the load for the full-scale current value as indicated on the front panel display. The CV annunciator on

the front panel must be on. If it is not, adjust the load so that the output current drops slightly.

e. Adjust the transformer to the lowest rated line voltage (e.g., 104 Vac for a 115 Vac nominal line voltage input).

f. Record the output voltage reading on the DVM.

g. Adjust the transformer to the highest rated line voltage (e.g., 127 Vac for 115 Vac nominal line voltage input).

h. Record the output voltage reading on the DVM. The difference between the DVM reading is steps (f) and (h) is

the source effect voltage and should not exceed the value listed in the performance test record chart for the

appropriate model under CV SOURCE EFFECT.

CV Noise (PARD)

Periodic and random deviations (PARD) in the output (ripple and noise) combine to produce a residual ac voltage

superimposed on the dc output voltage. CV PARD is specified as the rms or peak-to-peak output voltage in the

frequency range specified in the User’s Guide.

a. Turn off the supply and connect the output as shown in Figure 2-1a to an oscilloscope (ac coupled) between the

(+) and the (-) terminals. Set the oscilloscope's bandwidth limit to 20 MHz and use an RF tip on the oscilloscope

probe.

b. Turn on the supply and program the current to the maximum programmable value and the output voltage to the

full-scale value.

c. Adjust the load for the full-scale current value as indicated on the front panel display.

d. Note that the waveform on the oscilloscope should not exceed the peak-to-peak limits in the performance test

record chart for the appropriate model under CV NOISE (PARD).

e. Disconnect the oscilloscope and connect an ac rms voltmeter in its place. The rms voltage reading should not

exceed the RMS limits in the performance test record chart for the appropriate model under CV NOISE

(PARD).

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2 - Verification and Performance Tests

Transient Recovery Time

This test measures the time for the output voltage to recover to within the specified value following a 50% change in

the load current.

tttt

Transient

Unloading

Transient

Figure 2-2. Transient Waveform

a. Turn off the supply and connect the output as in Figure 2-1a with the oscilloscope across the +S and the -S

terminals.

b. Turn on the supply and program the output voltage to the full-scale value and the current to the maximum

programmable value.

c. Set the load to the Constant Current mode and program the load current to 1/2 the power supply full-scale rated

current.

d. Set the electronic load's transient generator frequency to 100 Hz and its duty cycle to 50%.

e. Program the load's transient current level to the supply's full-scale current value and turn the transient generator

on.

f. Adjust the oscilloscope for a waveform similar to that in Figure 2-2.

g. The output voltage should return to within the specified voltage (v) in less than the specified time (t). Check

both loading and unloading transients by triggering on the positive and negative slope.

Constant Current (CC) Tests

CC Setup

Follow the general setup instructions in the Measurement Techniques paragraph and the specific instructions given in

the following paragraphs.

Current Programming and Readback Accuracy

This test verifies that the current programming and readback are within specification.

a. Turn off the supply and connect the current monitoring resistor across the power supply output and the DVM

across the resistor. See "Current Monitoring Resistor" for connection information.

b. Turn on the supply and program the output voltage to 5 V and the current to zero.

c. Divide the voltage drop (DVM reading) across the current monitoring resistor by its resistance to convert to

amps and record this value (Iout). Also, record the current reading on the front panel display. The readings

should be within the limits specified in the performance test record card for the appropriate model under CC

PROGRAMMING @ 0 AMPS.

d. Program the output current to full-scale .

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Verification and Performance Tests - 2

e. Divide the voltage drop (DVM reading) across the current monitoring resistor by its resistance to convert to

amps and record this value (Iout). Also, record the current reading that appears on the front panel display. The

readings should be within the limits specified in the performance test record card for the appropriate model

under CC PROGRAMMING @ FULL-SCALE.

Current Sink (-CC) Operation

This test verifies current sink operation and readback.

a. Turn off the supply and connect the output as shown in Figure 2-1a, except connect a dc power supply in place

of the electronic load as indicated. Connect the DMM across the current shunt.

b. Set the external power supply to 5 V and the current limit approximately 20% above the full scale current rating

of the supply under test.

c. Turn on the supply under test and program the output voltage to zero and full scale output current. The current

on the UUT display should be approximately full scale current negative.

d. Divide the voltage drop across the current monitoring resistor by its resistance to obtain the current sink value in

amps and subtract this from the current reading on the display. The difference between the readings should be

within the limits specified in the performance test record chart under CURRENT SINK READBACK.

Low Range Current Readback Accuracy

This test verifies the readback accuracy of the 20 milliampere current range.

a. Turn off the supply and connect the output as shown in Figure 2-1b. Set the DMM to operate in current mode.

b. Turn on the supply under test and program the output voltage to zero and full scale output current. The current

on the UUT display should be approximately 0 mA.

c. Record the current reading on the DMM and the reading on the front panel display. The difference between the

two readings should be within the limits specified in the performance test record chart under 20mA RANGE

CURRENT READBACK ACCURACY @ 0A.

d. Program the output voltage to 20V and record the current reading on the DMM and the reading on the front

panel display. The difference between the readings should be within the limits specified in the performance test

record chart for the appropriate model under 20mA RANGE CURRENT READBACK ACCURACY @ 20mA

e. Turn off the supply and connect the output and an external supply as shown in Figure 2-1c. Set the DMM to

operate in current mode.

f. Turn on the external supply and program it to 20 V and 1 amp. Then program the supply under test to zero volts

and 1 amp. The UUT display should read approximately −20 mA.

c. Record the current reading on the DMM and the reading on the front panel display. The difference between the

two readings should be within the limits specified in the performance test record chart under 20mA RANGE

CURRENT READBACK ACCURACY @ −20 mA.

CC Load and Line Regulation

These tests (CC Load Effect and CC Source Effect given below) are tests of the dc regulation of the power supply's

output current. To insure that the values read are not the instantaneous measurement of the ac peaks of the output

current ripple, several dc measurements should be made and the average of these readings calculated. An example of

how to do this is given below using an Agilent 3458A System Voltmeter programmed from the front panel. Set up

the voltmeter and execute the "Average Reading" program follows:

a. Program 10 power line cycles per sample by pressing NPLC 1 0 ENTER .

b. Program 100 samples per trigger by pressing (N Rdgs/Trig) 1 0 0 ENTER .

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2 - Verification and Performance Tests

c. Set up voltmeter to take measurements in the statistical mode as follows:

Press Shift key, f0, Shift key, N

Press ^ (up arrow) until MATH function is selected, then press >.

Press ^ (up arrow until STAT function is selected then press (ENTER).

d. Set up voltmeter to read the average of the measurements as follows:

Press Shift key, f1, Shift key, N.

Press down arrow until RMATH function is selected, then press >.

Press ^ (up arrow) until MEAN function is selected, then press ENTER.

e. Execute the program by pressing f0, ENTER, TRIG, ENTER

f. Wait for 100 readings and then read the average measurement by pressing f1, ENTER.

To repeat the measurement, perform steps (e) and (f).

CC Load Effect

This test measures the change in output current for a change in load from full scale output voltage to short circuit.

a. Turn off the supply and connect the output as shown in Figure 2-1a with the DVM connected across the current

monitoring resistor.

b. Turn on the supply and program the current to the full scale current value and the output voltage to the

maximum programmable voltage value.

c. Adjust the load in the CV mode for full scale voltage as indicated on the front panel display. Check that the CC

annunciator of the UUT is on. If it is not, adjust the load so that the output voltage drops slightly.

d. Record the output current reading (DVM reading/current monitor resistance value in ohms). You may want to

use the average reading program described under “CC Load and Line Regulation”.

e. Short the load switch and record the output current reading. The difference in the current readings in steps (d)

and (e) is the load effect and should not exceed the limit specified in the performance test record chart for the

appropriate model under CC LOAD EFFECT.

CC Source Effect

This test measures the change in output current that results when the AC line voltage changes from the minimum to

the maximum value within the specifications.

a. Turn off the supply and connect the ac power line through a variable voltage transformer.

b. Connect the output terminals as shown in Figure 2-1a with the DVM connected across the current monitoring

resistor. Set the transformer to the nominal line voltage.

c. Turn on the supply and program the current to the full scale value and the output voltage to the maximum

programmable value.

d. Adjust the load in the CV mode for full scale voltage as indicated on the front panel display. Check that the CC

annunciator of the UUT is on. If it is not, adjust the load so that the output voltage drops slightly.

e. Adjust the transformer to the lowest rated line voltage.

f. Record the output current reading (DVM reading/current monitoring resistor in ohms). You may want to use the

average reading program described under “CC Load and Line Regulation”.

g. Adjust the transformer to the highest rated line voltage.

h. Record the output current reading again. The difference in the current readings in steps (f) and (h) is the CC

source effect and should not exceed the values listed in the performance test record card under CC SOURCE

EFFECT.

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Verification and Performance Tests - 2

CC Noise (PARD)

Periodic and random deviations (PARD) in the output combine to produce a residual ac current, as well, as an ac

voltage superimposed on the dc output. Constant current (CC) PARD is specified as the rms output current in a

frequency range 20 Hz to 20 Mhz with the supply in CC operation.

a. Turn off the supply and connect the load, monitoring resistor, and rms voltmeter across the monitoring resistor

as shown in Figure 2-1a. The Current Monitoring resistor may have to be substituted by one with a higher

resistance and power rating, such as a 1 ohm 50 W current shunt in series with the appropriate 3, 24, or 99 ohm

resistor, to get the RMS voltage drop high enough to measure with the RMS voltmeter. Leads should be as short

as possible to reduce noise pick-up. An electronic load may contribute ripple to the measurement so if the RMS

noise is above the specification a resistive load may have to be substituted for this test.

b. Check the test setup for noise with the supply turned off. Other equipment (e.g. computers, DVMs, etc.) may

affect the reading.

c. Turn on the supply and program the current to full scale and the output voltage to the maximum programmable

value.

d. The output current should be at the full scale rating with the CC annunciator on.

e. Divide the reading on the rms voltmeter by the monitor resistor to obtain rms current. It should not exceed the

values listed in the performance test record card under CC NOISE (RMS).

Performance Test Equipment Form

Test Facility:_________________________

____________________________________

Model ______________________________

Serial No. ____________________________

Options _____________________________

Firmware Revision ____________________

Special Notes:

Report Number ________________________

Date _________________________________

Customer _____________________________

Tested By ____________________________

Ambient Temperature (C) ________________

Relative Humidity (%) ___________________

Nominal Line Frequency __________________

Test Equipment Used:

Description

Model No.

Trace No.

Cal. Due Date

AC Source

_________________

DC Voltmeter

RMS Voltmeter

Oscilloscope

Electronic Load

Current Shunt

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2 - Verification and Performance Tests

Performance Test Record Forms

Model Agilent 66332A OR

Agilent6632B

Report No _______________ Date __________________

Test Description

Minimum

Specs.

Results*

Maximum

Specs.

Measurement

Uncertainty

Constant Voltage Tests

Voltage Programming and Readback

Low Voltage (0V) Vout

__________

+ 10 mV

Vout + 3 mV

20.020 V

− 10 mV

Vout − 3 mV

19.980 V

1.6 µV

335 µV

20 µV

Front Panel Display Readback

High Voltage (Full Scale) Vout

Front Panel Display Readback

Vout + 9 mV

Vout − 9 mV

Load Effect

__________

+ 2 mV

− 2 mV

Source Effect

+ 0.5 mV

− 0.5 mV

20 µV

PARD (Ripple and Noise)

Peak-to-Peak

0 mV

__________

+ 3 mV

872 µV

50 µV

RMS

+ 0.3 mV

Transient Response

0 mV

__________

+ 20 mV

3 mV

Voltage in 100 µs

Constant Current Tests

Current Programming and Readback

Low current (0A) Iout

__________

+ 2.0 mA

Iout + 0.5 mA

5.0045 A

− 2.0 mA

Iout − 0.5 mA

4.9955 A

15.2 µA

Readback Accuracy @ Iout

High Current (Full Scale) Iout

Readback Accuracy @ Iout

818.7 µA

Iout + 10.5 mA

Iout − 10.5 mA

Current Sink Readback

__________ Isink + 11.1mA

Isink − 11.1mA

20 mA Range Current Readback

Readback Accuracy @ 0 A

__________

− 2.5 µA

+ 2.5 µA

0.1 µA

1.7 µA

Readback Accuracy @ + 20 mA

Readback Accuracy @ − 20 mA

Iout − 22.5 µA

Iout + 22.5 µA

PARD (Current Ripple and Noise)

RMS

0 mA

__________

+ 2.0 mA

+ 1.0 mA

+ 0.5 mA

250 µA

2.5 µA

Load Effect

− 1.0 mA

− 0.5 mA

Source Effect

* Enter your test results in this column

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Verification and Performance Tests - 2

Model Agilent 6633B

Test Description

Report No _______________ Date __________________

Minimum

Specs.

Results*

Maximum

Specs.

Measurement

Uncertainty

Constant Voltage Tests

Voltage Programming and Readback

Low Voltage (0V) Vout

__________

+ 20 mV

Vout + 6 mV

50.045 V

− 20 mV

Vout − 6 mV

49.955 V

1.7 µV

Front Panel Display Readback

High Voltage (Full Scale) Vout

Front Panel Display Readback

717.5 µV

35 µV

Vout + 21 mV

Vout − 21 mV

Load Effect

__________

+ 4 mV

− 4 mV

Source Effect

+ 1.0 mV

− 1.0 mV

35 µV

PARD (Ripple and Noise)

Peak-to-Peak

0 mV

__________

+ 3 mV

872 µV

50 µV

RMS

+ 0.5 mV

Transient Response

0 mV

__________

+ 50 mV

8 mV

Voltage in 100 µs

Constant Current Tests

Current Programming and Readback

Low current (0A) Iout

__________

+ 1.0 mA

Iout + 0.25 mA

2.002 A

− 1.0 mA

Iout − 0.25 mA

1.998 A

15.1 µA

Readback Accuracy @ Iout

High Current (Full Scale) Iout

Readback Accuracy @ Iout

252.5 µA

Iout + 4.3 mA

Iout − 4.3 mA

Current Sink Readback

__________ Isink + 4.9 mA

Isink − 4.9 mA

20 mA Range Current Readback

Readback Accuracy @ 0 A

__________

− 2.5 µA

+ 2.5 µA

0.1 µA

1.7 µA

Readback Accuracy @ + 20 mA

Readback Accuracy @ − 20 mA

Iout − 22.5 µA

Iout + 22.5 µA

PARD (Current Ripple and Noise)

RMS

0 mA

__________

+ 2.0 mA

+ 1.0 mA

+ 0.25 mA

250 µA

1.6 µA

Load Effect

− 1.0 mA

− 0.25 mA

Source Effect

* Enter your test results in this column

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2 - Verification and Performance Tests

Model Agilent 6634B

Test Description

Report No _______________ Date __________________

Minimum

Specs.

Results*

Maximum

Specs.

Measurement

Uncertainty

Constant Voltage Tests

Voltage Programming and Readback

Low Voltage (0V) Vout

__________

+ 50 mV

Vout + 12 mV

100.1 V

− 50 mV

2.1 µV

1.4 mV

Front Panel Display Readback

Vout − 12 mV

99.9 V

High Voltage (Full Scale) Vout

Front Panel Display Readback

Vout + 42 mV

Vout − 42 mV

− 5 mV

Load Effect

__________

+ 5 mV

+ 1 mV

60 µV

Source Effect

− 1 mV

PARD (Ripple and Noise)

Peak-to-Peak

0 mV

__________

+ 3 mV

872 µV

50 µV

RMS

+ 0.5 mV

Transient Response

0 mV

__________

+ 100 mV

15 mV

Time in 100 µs

Constant Current Tests

Current Programming and Readback

Low current (0A) Iout

__________

+ 0.5 mA

Iout + 0.25 mA

1.001 A

− 0.5 mA

Iout − 0.25 mA

0.999 A

15.1 µA

Readback Accuracy @ Iout

High Current (Full Scale) Iout

Readback Accuracy @ Iout

128.8 µA

Iout + 2.3 mA

Iout − 2.3 mA

Current Sink Readback

__________ Isink + 2.9 mA

Isink − 2.9 mA

20 mA Range Current Readback

Readback Accuracy @ 0 A

__________

− 2.5 µA

+ 2.5 µA

0.1 µA

1.7 µA

Readback Accuracy @ + 20 mA

Readback Accuracy @ − 20 mA

Iout − 22.5 µA

Iout + 22.5 µA

PARD (Current Ripple and Noise)

RMS

0 mA

__________

+ 2.0 mA

+ 1.0 mA

+ 0.25 mA

250 µA

1 µA

Load Effect

− 1.0 mA

− 0.25 mA

Source Effect

1 µA

* Enter your test results in this column

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Troubleshooting

Introduction

WARNING:

SHOCK HAZARD. Most of the troubleshooting procedures given in this chapter are performed

with power applied and protective covers removed. Such maintenance should be performed only

by service trained personnel who are aware of the hazards (for example, fire and electrical shock).

CAUTION:

This instrument uses components which can either be damaged or suffer serious performance

degradation as a result of ESD (electrostatic discharge). Observe the standard antistatic precautions

to avoid damage to the components. An ESD summary is given in Chapter 1.

This chapter provides troubleshooting and repair information for the dc power supply. Before attempting to

troubleshoot the dc power supply, first check that the problem is with the supply itself and not with an associated

circuit. The verification tests in Chapter 2 enable you to isolate a problem to the dc power supply. Troubleshooting

procedures are provided to isolate a problem to one of the circuit boards or a particular circuit. Figure 3-2 shows the

location of the circuit boards and other major components of the unit. If a problem has been isolated to the A1

Control circuit board, additional troubleshooting procedures are available to isolate the problem to the defective

component(s). Disassembly procedures are provided at the end of this chapter and should be referred to, as required,

in order to gain access to and/or replace defective components.

If a component is defective, replace it and then conduct the verification test given in Chapter 2.

NOTE:

Note that when certain components are replaced, the supply must be calibrated (See "Post Repair

Calibration" later in this chapter). If the A2 Interface Board is replaced, the supply must be

initialized before it is calibrated. See "Initialization" later in this chapter.

Chapter 5 lists all of the replaceable parts for the power supplies. Chapter 6 contains schematics, test point

measurements, and component location diagrams to aid you in troubleshooting the supply.

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3 - Troubleshooting

Test Equipment Required

Table 3-1 lists the test equipment required to troubleshoot the power supply. Recommended models are listed.

Table 3-1. Test Equipment Required for Troubleshooting

Type

Purpose

Recommended Model

GPIB Controller

To communicate with the supply via the

GPIB interface

HP Series 300

Digital Voltmeter

Oscilloscope

To check various voltage levels

To check waveforms and signal levels

To test operation of current circuit

To access IC pins

Agilent 3458A

Agilent 54504A/54111A

Agilent 6060B

Electronic Load

IC Test Clips

AP Products No. LTC

Guildline 9230/15

Ammeter/Current

Shunt

To measure output current

Overall Troubleshooting

Overall troubleshooting procedures for the power supply are given in the Figure 3-1. The procedures first check that

neither an AC input, nor a bias supply failure is causing the problem and that the supply passes the turn-on self test

(error annunciator stays off). The normal turn-on, self-test indications are described in the "Checkout Procedure" in

Chapter 3 of the User's Guide.

If the supply passes the self test and there are no obvious faults, you should perform the verification procedures in

Chapter 2 from the front panel to determine if any functions are not calibrated or are not operating properly. Then

program and read back a voltage via the GPIB to see if the supply responds properly to bus commands. If the supply

fails any of the tests, you will be directed to the applicable flow chart or troubleshooting procedure.

Flow Charts

Troubleshooting flow charts are given in Figure 3-1 sheets 1-10. Several flow charts make reference to the test points

listed in Chapter 6. The circuit locations of the test points are shown on the schematics and on the component

location diagrams in Chapter 6.

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Troubleshooting - 3

Turn on unit and observe the

display. Unit should display all of

the segments and annunciators,

the address and then after self

test display either an error

message or go to the metering

mode.

Replace A3 Front

Panel/Display

board

Yes

+5V @ A3J2-8?

A3J2-5 held

low?

Display comes

on?

Yes

Troubleshoot A1

+5V Interface Bias

circuit, W6 or W7.

Yes

Replace A2

Interface board

See Error Message

Table 3-2

Yes

Error Message?

Go to

Protect

Annunciator

On?

"Troubleshooting

OV at Turn-on"

(sheet 4)

Yes

OV?

Check RI input, A2

Interface board

RI?

Yes

Disable OCP and

check for normal

operation

OC?

Go to "FS indicated

but fuse is OK"

(sheet 6)

FS?

Fuse blown?

Go to sheet 2

Yes

For OT check fan

circuit, thermal

sensor RT301

Replace internal

fuse F300

Figure 3-1 Sheet 1. Main Flowchart

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3 - Troubleshooting

Continued from

sheet 1

Program Voltage

and Current full

scale, enable output

with no load.

Measure Voltage at

output terminals.

If output is OK but

meter wrong, replace

A2. If both are off,

check gain of

Voltage Monitor

Amplifier A1U315B

Display and

measured

voltage OK?

Voltage close

to programmed

value?

Output Voltage

near zero?

Yes

Go to

"Troubleshooting No

Output Voltage"

(sheet 7)

Calibrate Voltage

Load output to put

unit into CC and

measure output

current with extrenal

amp meter

If output is OK but

meter wrong, replace

A2. If in CC but both

are off, check gain of

Current Monitor

Amplifiers and

Display and

measured

current OK?

Current > prog

and unit not in

CC?

Current close

to programmed

value?

Monitor Resistor

R403/473 values. If

the current is lower

than programmed

and UNReg is

Yes

displayed, check

A1Q307 and Output

Stage

Go to

Program OV below

output voltage

Calibrate Current

"Troubleshooting No

Current limit"

(sheet 10)

Go to

"Troubleshooting

Unit Does not OV”

OV Trips?

(sheet 11)

Yes

Program OV to

maximum and reset

protection

Go to sheet 3

Figure 3-1 Sheet 2. Main Flowchart (continued)

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Troubleshooting - 3

Figure 3-1 Sheet 3. Main Flowchart (continued)

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3 - Troubleshooting

Connect a DC coupled

scope set to 1mS/20V/

div across the output

and turn on the supply

while observing the

scope for a momentary

pulse greater than the

supply rating

Go to “Troubleshooting

High Output Voltage”

(sheet 7)

Does the supply

overshoot?

Yes

Disable the OV circuit

as described in

paragragh "Disabling

Protection Features"

Output @ zero

volts?

Yes

4V @ A1R350-2?

Yes

A2 or W7 Defective

Check C336, R356,

R351, R349(1-2) and

U306B

+.3V @ U306B-7?

Yes

Check C335, R354,

R350(1-2) and U306B

+4V @ U306-8?

Yes

Go to sheet 5

Figure 3-1 Sheet 4. OV at Turn-On

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Troubleshooting - 3

Continued from

sheet 4

Connect a DC coupled

scope across the

output and press

Protect Clear several

times while observing

the scope

Go to "Troubleshooting

High Output Voltage"

(sheet 12)

Yes

Pulses high?

A1U306B-2,

OV_Detect*, High?

Yes

U306B-8 3.8V?

U306B-7 < pin 8?

Check U306B, A2

Check R349, R351,

R356

Check OV_Prog,

Imon_Comp, C335,

R350, R354

Yes

A1R438,

OV_SCR*, +0.6V?

Check R441, Q318B,

A2, Interface Board

Note: OV_SCR* is

normally a pulse that

goes low for 5us to trip

the OV SCR, CR342.

Yes

Check A1CR342,

Q318A, B & D and

associated

components

Figure 3-1 Sheet 5. OV at Turn-On (continued)

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3 - Troubleshooting

Program output on,

voltage and current full

scale then check

output voltage

FS Prot off and

Output OK?

Yes

Calibrate unit

Disable the protection

feature by

simultaneously

pressing the 0 and 9

keys, press the ^ key

until the display reads

"No Protect Off", press

the Up Arrow to display

"No Protect On" then

press enter

Output V >

programmed

value?

Go to "Troubleshooting

High Output Voltage"

(sheet 12)

Yes

Check FUSE signal

U305B-7 (approx.

+2.8V with 20V output)

Troubleshoot Fuse

divider and amplifier

circuit (R393/394,

U305)

FUSE signal OK?

Yes

Problem may be

defective A2 or one of

the voltages to A2

(Vmon, Imon_H,

Imon_L, Imon_P) > its'

bias voltage +5Vs

Figure 3-1 Sheet 6. FS Indicated but Fuse OK

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Troubleshooting - 3

Program full scale

voltage and current

and enable output.

Measure output

voltage with an

external voltmeter.

Check W7 (Vmon) and

A2, Interface board

Display zero V but

output OK?

Yes

Check for short across

Yes output such as output

cap C382, CR342, etc.

CV or CC

Annunciator on?

Displays current

equal to prog

value?

Yes

CC?

Yes

Go To sheet 9

Check W7, A2

CC_Prog, R360

Interface Board

-4.7V

Q305A base

Yes

PM_Inhibit, R335

-11.4V

Low

IMon_H,

U309A-6,~0V

Check Positive Current

Yes

Control Circuit, U310B

Troubleshoot Turn-On

Control Circuit, Q305B,

C, D and U305A

Check High Range

Current Monitor Amp,

U309A

Yes

Check W7, A2

Interface Board

Go to sheet 8

Figure 3-1 Sheet 7. No Output Voltage

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3 - Troubleshooting

Continued from

sheet 7

Q302 base

Check C330, R333,

R346, and Q302

Yes

-5V

Yes

Check +Rail and

Output Stage

Q303 base >1.2V

(meas. from +Out)

Check Q301, Q305

circuits

>1V across R323

Yes

Check Q302, Q307,

R324 and R326

Q307 collector to

emitter

4V?

Yes

Check C331, C333,

C339 and Q306

circuits

Figure 3-1 Sheet 8. No Output Voltage (continued)

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Troubleshooting - 3

Continued from

sheet 7

Check W7, A2

Interface Board

CV_Prog @ R401

-4.7V

Yes

VMon,

U315B-7

~0V

Check Voltage Monitor

Amplifier, U315B,

circuit

Yes

Check Voltage Control,

Circuit U315A

Figure 3-1 Sheet 9 No Output Voltage (continued)

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3 - Troubleshooting

Continued from

sheet 2

Check A2 Interface

Board

CC_Prog, R360,

-4.8V

Yes

Imon_H, U309A-6

Drop across R473

Check R473

~+3.5V

~0.25V

Yes

Check High Range

Current Monitor

Amplifier

Check Positive Current

Control Circuit

Figure 3-1 Sheet 10. No Current Limit

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Troubleshooting - 3

Program the output

voltage and current to

the full scale value and

the OV to 1/2.

A2 Interface Board or

cable W7 defective

OV_prog ~+2V @

R350

Yes

Check R350, C335 and

U306B

U306B-8

~+2V

Yes

U306B-7

~+4V

Check R349, R351,

R356, C336 and U306

Yes

U306B-2,

OV_DETECT*,

Low?

Reset the OV (Shift,

Check U306B

Prot Clr) and observe

the OV_SCR* signal.

Each time OV is reset

the unit will generate

another OV signal. The

OV pulse (OV_SCR*)

is approximately 5us

long.

Yes

See note

Check Q318B, R441,

A2 Interface Board

OV_SCR* pulse @

R438 low 5us

Yes

Q318D Collector

pulses high 5us

Check Q318A, B and D

and associated circuits

Yes

Check A1CR342

Figure 3-1 Sheet 11. Unit Does Not OV

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3 - Troubleshooting

Disable the OV capability by

shorting R351. After the

protection is disabled, program

the output voltage to zero,

current to full scale and Output

ON. If the unit is in "Protect"

mode, Press Protect Clear. The

output should now go high and

not trip the OV.

* V_mon should be approximately

6632B or 66332A Vout/4.25

6633B

6634B

Vout/10.52

Vout/21

Vmon,

U315B-7,

OK ?*

Check Voltage Monitor

Amplifier, U315B

circuit

Is the CV

annunciator on

Yes

CV_Prog,

R401

~0V

A2 Interface Board

Measure voltage at the

base of Q303 with

Yes

respect to its' emitter

Check Voltage Control

U315A, circuit

Troubleshoot Voltage

Gain Stage

Voltage <0.6V

Yes

Troubleshoot Output

Stage

Figure 3-1 Sheet 12. High Output Voltage

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Troubleshooting - 3

Specific Troubleshooting Procedures

Power-on Self-test Failures

The power-on self-test sequence tests most of the digital and DAC circuits. If the supply fails self-test, the display

"ERR" annunciator will come on. You can then query the unit to find out what the error(s) are. When an error is

detected, the output is not disabled so you can still attempt to program the supply to help troubleshoot the unit.

Table 3-2 lists the self test errors and gives the probable cause for each error.

NOTE:

A partial self test is performed when the *TST? query is executed. Those tests that interfere with

normal interface operation or cause the output to change are not performed by *TST?. The return

value of *TST? will be zero if all tests pass, or the error code of the first test that failed. The power

supply will continue normal operation if *TST? returns a non-zero value.

Table 3-2. Self-Test Error Codes/Messages

Error Code Description

Probable Cause

A2 Interface Bd

Checksum in Read-only Non-volatile ROM

Checksum in Config Non-volatile ROM

Checksum in Cal Non-volatile ROM

Checksum in State Non-volatile ROM

Checksum in RST Non-volatile ROM

RAM test failed

E10

E11

12 bit DAC test failed, 0 is written to DAC U241A and B, A2 Interface Bd

ADC U242 is checked for 133 +/- 7 counts

E12

E13

E14

E15

E80

12 bit DAC test failed, 4095 is written to DAC U241A

and 0 to B, ADC U242 is checked for 71 +/- 7 counts

A2 Interface Bd

12 bit DAC test failed, 0 is written to DAC U241A and

4095 to B, ADC U242 is checked for 71 +/- 7 counts

12 bit DAC test failed, 4095 is written to DAC U241A

and B, ADC U242 is checked for 10 +/- 7 counts

8 bit DAC test failed, 10 and 240 are written to DAC

U244, ADC U242 is checked for 10 and 240 +/- 7 counts

Dig I/O test failed, SEC_PCLR written low and high,

read back through Xilinx

E213

E216

E217

E218

E220

E221

E222

E223

RS-232 input buffer overrun

A2 Interface Bd

RS-232 framing error

A2 Interface Bd

RS-232 parity error

A2 Interface Bd

RS-232 UART input overrun

A2 Interface Bd

Front Panel comm UART input overrun

Front Panel comm UART framing error

Front Panel comm UART parity error

Front Panel firmware input buffer overrun

A3 Front Panel/Display Bd

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3 - Troubleshooting

CV/CC Status Annunciators Troubleshooting

The CV/CC annunciators are particularly helpful when troubleshooting a unit with no output. If the unit has no

output voltage or current and one of the annunciators is on then the problem is in the control circuit associated with

that annunciator. An example of how this might be useful would be in a case where the voltage and current are

programmed to some positive value, there is no output voltage and the CV annunciator is on. This indicates that the

problem is probably in the Voltage Amplifier circuit. If the CC annunciator were on then the problem would likely

be in the Current Amplifier. If UNR is indicated then neither the voltage nor the current circuits are in control and

the problem would be in circuits after the gating diodes such as the driver or output regulator stages.

When troubleshooting the CV/CC status annunciators or the status readback circuits, first measure the voltage drop

across the gating diodes; A1 D328 (CV) and D325 (CC). A conducting diode indicates an active (ON) control

circuit. This forward drop is applied to the input of the associated status comparator (U306A and D respectively) and

drives the output (CV_DETECT* or CC_DETECT*) low. The low signal indicates an active status which is sent to

the A2 board microprocessor. The front panel CV annunciator indicates when the CV mode is active

(CV_DETECT* is low). The front panel CC annunciator indicates when the CC mode is active (CC_DETECT* is

low). The UNREGULATED (UNR) annunciator comes on when neither the CV nor CC is active.

Bias and Rail Voltages

Before troubleshooting any circuit check the bias and/or rail voltages to make sure that they are not the cause. Table

3-3 lists the bias and rail voltage test points for the A1 Main Control , A2 Interface, and the A3 Front Panel/Display

boards. Unless otherwise noted, all voltages are measured with respect to secondary common (R473-3) with no load

on the supply.

Table 3-3. Bias and Reference Voltages

Bias

Test Point

Common

Measurement

(See Figure 6-1)

+Rail¹(Agilent

6632B/66332B)

A1 TP 310

- Output

+38V 10% (800mV P/P)

+Rail¹(Agilent 6633B)

+Rail¹(Agilent 6634B)

-Rail¹(Agilent

A1 TP 310

A1 TP 311

- Output

+73V 10% (2.5V P/P)

+130V 10% (2.2V P/P)

-9.8V 10% (400mV P/P)

6632B/66332B)

-Rail¹(Agilent 6633B)

-Rail¹(Agilent 6634B)

+5V secondary

+12V secondary

+15V secondary

-12V secondary

-15V secondary

V_Ref

A1 TP 311

A1 R317

- Output

-10.2V 10% (300mV P/P)

-10.5V 10% (300mV P/P)

+5V 4%

- Output

Secondary Common

A1 D470 cathode Secondary Common

+12V 5%

A1 R318

Secondary Common

E 306 (black wire)

+15V 4%

A1 D471 anode

A1 R315

-12V 5%

-15V 4%

A1 R475

+2.5V 6%

+5V Interface²

E306 (red wire)

+5V 3%

¹Measured with respect to - Output at nominal ac input line voltage

Measured with reference to Interface Ground (E306 black wire)

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Troubleshooting - 3

J307 Voltage Measurements

J307 connects the A1 Main Board Assembly to the A2 Interface Assembly. Table 3-4 provides a quick method of

determining if the voltages between these assemblies are within the normal range. If any of these voltages is outside

the normal range, refer to the flowcharts to further troubleshoot the circuit associated with the abnormal voltage.

Table 3-4. Voltage Measurements at J307 (A2 Interface to A1 Main board)

A1J307

Pin #

Signal Name

CV Mode

Full Scale Voltage

No Load

CC Mode

Full Scale Voltage

Full Load

PM_INHIBIT (Enabled)

OV_SCR*

OV_PROG

+3.9

+2.8

+3.9

+3.8

FAN_PROG

OV_DETECT*

SW_POS (Norm)

RANGE_SELECT (High)

OS_TRIM_NEG (COMP)

OS_TRIM_NEG (SCPI)

+5Vs

+1.7

+4.0

+1.7

+4.0

COMMON

+15Vs

+15

-15

+2.5

+2.4

+15

-15

+2.5

+2.6

+3.5

-15Vs

HS_THERM (@25C)

FUSE

IMON_H

IMON_L

IMON_L (@20mA Out)

+4.8

+14.7

+4.8

IMON_P

+4.8

VMON

COMMON

CV_PROG

CC_PROG

CC_DETECT*

CCN_DETECT*

CV_DETECT*

-4.8

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3 - Troubleshooting

Manual Fan Speed Control

Under some circumstances such as testing acoustical devices where the fan noise would interfere with the test, it

would be advantageous to reduce the fan speed. If the test requires a very light load, the ambient temperature is low

and the duration of the test is short, the fan speed may be temporarily reduced. The turn-on default is "Automatic" so

this procedure must be performed, as needed, every time the line voltage is turned on. To manually control the fan

speed:

a. Simultaneously depress the "0" and "9” keys. EEINIT <model> will be displayed.

b. Using the Up/Down annunciator keys select FAN:MODE<AUTO.>.

c. Using the Up/Down arrows select FAN:MODE <MAN>

d. Press "Enter"

e. Simultaneously depress the "0" and "9" keys. EEINIT <model> will be displayed.

Using the Up/Down annunciator keys select FAN:SPEED <data>

g. Press "Enter Number".

h. Enter the desired speed (numeric entry range is 0 to 100%)

Press "Enter"

Disabling Protection Features

Except for overvoltage protection, the power supply's protection features may be disabled. This is not recommended

as a normal operating condition but is helpful under some circumstances such as troubleshooting. The turn-on default

is "NO-PROTECT OFF" (protection enabled) so this procedure must be performed, as needed, every time the line

voltage is turned on. To disable the protection:

a. Simultaneously depress the "0" and "9" keys. EEINIT <model> will be displayed.

b. Using the Up/Down annunciator keys select NO-PROTECT <OFF>.

c. Using the Up/Down arrows select NO-PROTECT <ON>.

d. Press "Enter"

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Troubleshooting - 3

Post-repair Calibration

Calibration is required annually and whenever certain components are replaced. If components in any of the circuits

listed below are replaced, the supply must be re-calibrated as described in Appendix B of the User's Guide.

a. A1 Control Board: Voltage or Current Monitor Amplifier circuits, High Bandwidth Current Amplifier, or

Current Monitor resistors R403/R473

b. A2 Interface Board

If the Interface board A2 is replaced, the supply must be initialized first (see "Initialization" later in this chapter) and

then be calibrated.

Inhibit Calibration Switch

If "CAL DENIED" appears on the display when calibration is attempted, or if error code 401 occurs when

calibrating over the GPIB, the internal INHIBIT CAL switch has been set. This switch setting prevents unauthorized

or inadvertent power supply calibration. You must reset this switch in order to calibrate the supply.

This four-section switch, S201, is located on the A2 Interface board near the GPIB connector. The switch has 2

functions related to calibration. One is Inhibit Calibration. With this switch set the supply will not respond to

calibration commands, thus providing security against unauthorized calibration. The other switch allows you to

bypass the password in case it is forgotten.

Switch 3 Switch 4

4 3 2 1

Off

Normal

Clear

Password

S201

Off

Inhibit

Calibration

Calibration Password

In order to enter the calibration mode, you must use the correct password as described in Appendix B of the

Operating Manual. As shipped from the factory, the number 0 (zero) is the password. If you use an incorrect

password, "OUT OF RANGE" will appear on the display for front panel calibration (or error code 402 occurs for

GPIB calibration) and the calibration mode will not be enabled.

If you have changed the password and have forgotten it, you can set the configuration switch on A2 Interface board

to bypass the password. See "Calibration Switch" paragraph above.

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3 - Troubleshooting

Initialization

The dc power supply's GPIB address and model number as well as other constants which are required to program

and calibrate the supply are stored in a EEPROM on the A2 Interface board. The Interface board also contains

references and other components that will affect the alignment of the supply. If the Interface board is replaced, the

supply must be reinitialized and calibrated. To initialize the power supply:

a. Enable the Calibration mode

b. Simultaneously depress the "0" and "9” keys.

c. Using the Up/Down arrows select the appropriate model number

d. Press "Enter"

The dc power supply will go through the turn-on self test sequence. It is now re-initialized and must be calibrated.

See Appendix A of the User’s Guide for the calibration procedure.

ROM Upgrade

Identifying the Firmware

You can use the *IDN? query to identify the revision of the supply's firmware. The query will readback the

revisions of the Primary Interface ROM located on the A2 Interface board. The manufacturer and model number of

the supply are also returned. The following is a sample program:

ALLOCATE L$[52]

OUTPUT 705;"*IDN?"

ENTER 705;L$

DISP L$

END

The computer will display the manufacturer's name, the model number, a "0," and then the firmware revision.

Example: "AGILENT TECHNOLOGIES,66332A,0,A.00.01". The revision level of the ROM can also be found on

the label affixed to the physical IC chip itself.

Upgrade Procedure

If the Interface board ROM is upgraded you can re-initialize the supply without affecting the calibration.

a. Enable the Calibration mode.

b. Simultaneously depress the "0" and "9" keys. EEINIT <model> will be displayed.

c. Using the Up/Down annunciator keys select ROMUPD <model>.

d. Using the Up/Down arrows select the appropriate model number.

e. Press "Enter".

The supply will go through the turn-on self test sequence and return to the power supply metering mode.

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Troubleshooting - 3

Disassembly Procedures

The following paragraphs provide instructions on how to disassemble various components of the dc power supply.

Once disassembled, the components can be reassembled by performing the disassembly instructions in reverse

order. Figure 3-2 shows the location of the major components of the unit.

Figure 3-2. Component Location

WARNING:

CAUTION:

SHOCK HAZARD. To avoid the possibility of personal injury, turn off AC power and

disconnect the line cord before removing the top cover. Disconnect the GPIB cable and any loads,

and remote sense leads before attempting disassembly.

Most of the attaching hardware is metric. Use of other types of fasteners will damage threaded

inserts. Refer to the list of required tools when performing disassembly and replacement.

List of Required Tools

a. 2PT Pozidriv screwdrivers.

b. T10 and T15 Torx screwdrivers.

c. Hex drivers: 7 mm for GPIB connector,

3/16" for RS-232 connector,

1/4" for front panel binding posts

d. Long nose pliers.

e. Antistatic wrist discharge strap.

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3 - Troubleshooting

Cover, Removal and Replacement

a. Using a 2TP Pozi screwdriver, unscrew the two screws that hold the carrying straps to the power supply, and

then remove the two screws from the opposite side of the case.

b. To remove the cover, first spread the bottom rear of the cover slightly and push from the front panel

c. Slide the cover backward until it clears the rear of the power supply.

A2 Interface Board, Removal and Replacement

To remove the Interface Board, proceed as follows:

a. Remove the cover of the power supply as described under, "Cover Removal and Replacement."

b. Remove the two 7 mm and 3/16 inch hex screws that hold the GPIB and RS-232 connectors in place.

c. Unplug the cable from J206. Depress the release button located at the end of the connector where the wires enter

the housing.

d. Unplug the flat cables. Note the position of the conductive side for reinstallation. Connectors release the cable

by pulling out end tabs as shown by the arrows in the following figure.

e. Lift the board off of the snap-in standoffs.

f. To reinstall the Interface board, perform the above steps in reverse order.

Front Panel Assembly, Removal and Replacement

This procedure removes the front panel assembly from the dc power supply.

a. Remove the Power Supply Cover as described earlier in, "Top Cover Removal and Replacement."

b. Disconnect the cable between the Front Panel board and the Interface board at the Interface board.

c. Carefully peel off the vinyl trim strips on each side of the front panel that cover the front panel screws.

d. Using a Torx T10 driver remove the two screws (one on each side) that hold the front panel assembly to the

chassis.

e. Slide the Front Panel assembly forward and away from the chassis to access the S1 power switch.

f. Disconnect the wires going to the S1 switch assembly. For reassembly, make a note of the color coding of the

wires and the pins to which they are connected.

g . If the supply has front panel binding posts, unplug the cable from the binding post connector and use a Torx T15

driver to remove the screw connecting the ground wire to the chassis.

f. You can now remove the front panel assembly from the supply.

g. To reinstall the Front Panel Assembly, perform the above steps in reverse order.

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Troubleshooting - 3

S1 Line Switch, Removal and Replacement

a. First remove the front panel assembly as described under “Front Panel Assembly, Removal and Replacement.”

b. Release the switch from the front panel by pressing the locking tabs inward against the body of the switch and

pushing the switch out of its opening.

NOTE:

When reinstalling the switch, make sure that the letter “O” is facing up when the switch is installed

in its opening.

A3 Front Panel Board, Removal and Replacement

First remove the front panel assembly as described under, "Front Panel Assembly, Removal and Replacement."

Once you have access to the front panel board perform these steps:

a. Remove the RPG knob by pulling it away from the front panel.

b. Use a Torx T10 driver to remove the screw that secures the board to the front panel assembly.

c. Slide the board to the left to disengage the holding clips, then lift it out.

d. To reinstall the Front Panel board, perform the above steps in reverse order.

A1 Main Control Board

a. Remove the top cover and the A2 Interface board as previously described.

b. Disconnect all cables going to connectors on the main control board.

NOTE:

Be sure to note the position and orientation of all cables prior to removal so that no mistake is

made later when reinstalling these cables.

c. If your power supply is equipped with a relay option board, remove the Torx T10 screw that holds the relay

board bracket.

d. Remove four Torx T15 screws that secure the main control board to the chassis.

e. Slide the main board towards the front panel to release it from chassis mounted standoffs and then lift the board

out of the chassis.

T1 Power Transformer, Removal and Replacement

To remove the power transformer, the front panel assembly must first be removed to gain access to the bracket

screws that hold the transformer in place.

a. Remove the three Torx T10 screws securing the rear of the transformer bracket to the bottom of the chassis and

the two Torx T10 screws securing the front of the transformer to the chassis.

b. Use long nose pliers to disconnect all wires going to the transformer terminals.

c. Lift the transformer out of the chassis.

NOTE:

The AC power connections at the transformer primary are line voltage dependent. Refer to Figure

3-3 subsequent reconnection.

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3 - Troubleshooting

Line Voltage Wiring

Figure 3-3 illustrates the primary wiring configuration of the power transformer for various ac line voltages. Use

long nose pliers to disconnect the wires going to the transformer terminals.

NOTE:

Install the correct fuse when changing the ac line voltage from a previous setting:

for 110/120 Vac: 4 AM, Agilent p/n 2110-0055;

for 220/230 Vac: 2 AM, Agilent p/n 2110-0002

grey

white/red/grey

spare

jumper

grey

white/red/grey

jumper

orange

white

white/blue

yellow

white/grey

grey

white/green

white/red

blue

Figure 3-3. Transformer Wiring

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Principles of Operation

Introduction

This section describes the different functional circuits used in the dc power supply models covered in this manual.

First, the I/O external signals that connect to the Agilent power supply are described. Next, the overall block

diagrams for the dc power supply are described in detail.

The simplified block diagrams in this section show the major circuits on the dc power supply as well as the signals

between circuits. They also show the reference designations of some of the components in the functional circuit.

These same reference designators are shown in the schematic diagrams in Section 6.

I/O Interface Signals

Table 4-1 describes the interface signals between the power supply and the end user (or other external circuits and

devices).

Table 4-1. Power Supply Interface signals

Connector

Signal

Description

Front panel outputs +OUT

-OUT

Positive DC output voltage

Negative DC voltage (or return)

Rear panel

output/sense screw

terminals

+OUT

-OUT

+ sense

- sense

common

Positive DC output voltage

Negative DC voltage (or return)

+OUT sensing terminal

-OUT sensing terminal

connected to ground conductor

INH/FLT connector

FLT/INH mode¹

FLT output

FLT Common

INH Input

Digital I/O mode

OUT 0

OUT 1

IN 2/OUT 2

Common

pin 1

pin 2

pin 3

pin 4

INH Common

¹as-shipped configuration

RS-232 connector

GPIB connector

XON-XOFF

RTS-CTS

DTR-DSR

NONE

uses ASCII control codes DC# and DC1

uses Request-To-Send and Clear-To-Send lines

uses Data-Terminal-Ready and Data-Set-Ready lines

there is no flow control

GPIB/IEEE 488

Provides the interface to an external GPIB controller

Can be 100 Vac, 120 Vac, 220 Vac or 240 Vac Input

Ac input connector ac mains

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4 - Principles of Operation

A3 Front Panel Circuits

As shown in Figure 4-1, the supply's front panel assembly contains a circuit board, a keypad, a liquid crystal display

(LCD), and a rotary control (RPG) for the output voltage and current. With the exception of the RPG (A3G1), the

A3 Front Panel board is an assembly-level replaceable part. A separate front panel binding post board is also

included on the unit. It is also available as an assembly-level replaceable part.

The A3 front panel board contains microprocessor circuits, which decode and execute all keypad and RPG

commands that are transferred to the power supply output via the serial I/O port to the primary interface circuits on

the A2 interface board. The front panel microprocessor circuits also process power supply measurement and status

data received on the serial I/O port. This data is displayed on the LCD.

A2 Interface Circuits

The circuits on the A2 interface board provide the interface between the GPIB interface, RS-232 interface, and front

panel interface and the dc power supply. Communication between the power supply and a GPIB controller is

processed by the GPIB interface and the primary microprocessor circuits on the A2 board. The A2 Interface board is

assembly-level replaceable; it contains no user-replaceable parts.

With the exception of the front panel microprocessor, all digital circuits, analog-to-digital converters (ADC) and

digital-to-analog converters (DAC) in the dc power supply are located on the A2 Interface board. All control signals

between the A2 interface board and the A1 main board are either analog or level signals.

Primary Interface

The primary microprocessor circuits (DSP, ROM, and RAM chips) decode and execute all instructions and control

all data transfers between the controller and the secondary interface. The primary microprocessor circuits also

processes measurement and status data received from the secondary interface.

A Dual Asynchronous Control chip on the A2 board converts the RS-232, RI/DFI, and front panel data into the

primary microprocessor's 8-bit data format. The serial data is transferred between the primary interface and the

secondary interface via a serial bus and optical isolator chips. These chips isolate the primary interface circuits

(referenced to earth ground) from the secondary interface circuits.

Secondary Interface

The secondary interface circuits include a programmed logic array, EEPROM, boot-ROM, 8 and 12-bit DAC

circuits, and 8 and 16-bit ADC circuits. The programmed logic array translates the serial data received from the

primary interface into a corresponding digital signal for the appropriate DAC/ADC circuits. The logic array is also

connected directly to four DAC/ADC circuits. Under control of the logic array, the selected DAC converts the data

on the bus into an analog signal. Conversely, the selected ADC converts the analog signals from the A1 board into a

digital signal.

The logic array also directly receives status information from the A1 main board via three level-sensitive signal lines,

which inform the array of the following operating conditions: constant voltage mode (CV_Detect*), constant current

mode (CC_Detect*), negative current mode (CCN_Detect*), and overvoltage (OV_Detect*). The PM_Inhibit

control signal is used to shut down the bias voltage to the output stages and keep the power supply output off. The

OV_SCR* control signal is used to fire the SCR and keep the power supply output off when an overvoltage

condition has occurred.

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Principles of Operation - 4

Figure 4-1. A2/A3 Block Diagram

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4 - Principles of Operation

The EEPROM (electrically erasable programmable read-only memory) chip on the A2 interface board stores a

variety of data and configuration information. This information includes calibration constants, GPIB address,

present programming language, and model-dependent data, such as the minimum and maximum values of voltage

and current. One of the EEPROM storage locations holds a checksum value which is used to verify the integrity of

the EEPROM data. Access to the calibration data in the EEPROM is controlled by the combination of a password

and switch settings on A2S201, located on A2 interface board (See Chapter 3 "Inhibit Calibration Switch").

The Dual 12-bit DAC converts the programmed value of voltage and current on the bus into the CV_Prog and

CC_Prog signals, which are sent to the CV control circuits in order to control the magnitude of the output voltage in

the CV mode and output current in CC mode. The CV_Prog and CC_Prog signals are in the 0 to -5 V range, which

corresponds to the zero to full-scale output ratings of the dc power supply.

The Quad 8-bit DAC converts programmed information for the following circuits into analog format: negative offset

trim (OS_Trim_Neg), overvoltage setting (OV_Prog), current measurement range select (Range_Select), and fan

speed programming (Fan_Prog). The OS_Trim_Neg signal allows the negative current control circuit to be

calibrated at zero. The OV_Prog signal is applied to the OV detect circuit, which compares the programmed

overvoltage setting with the actual output voltage. The Range_Select signal selects either the high or the low (20mA)

measurement range. The Fan_Prog signal is applied to the fan speed control circuit in order to speed up the fan as

temperature increases, and to slow the fan speed down as temperature decreases.

The 16-bit ADC in conjunction with a 4x1 multiplexer returns data from the following measurement signals to the

logic array: monitored output voltage (VMon), monitored high-range current (Imon_H), monitored low-range current

(Imon_L), and monitored peak current (Imon_P). All measurement signals are in the range of 0 to +5V, which

corresponds to the zero to full-scale readback capability of the dc power supply.

The 8-channel, 8-bit ADC returns the following signals to the logic array: high-range output current (Imon_H), high

range negative current (Imon_H-), overvoltage (V_Mon), ambient temperature (Temp_Amb), heatsink temperature

(HS_Therm), and output fuse state (Fuse). Five of these signals are for fan control. The logic array varies the

Fan_Prog signal depending upon the ambient temperature, the heatsink temperature, and the present output voltage

and current. The Fuse signal informs the logic array if the output fuse (F300) is open.

A1 Main Board Circuits

Power Circuits

As shown in Figure 4-2, the power circuits consist of: input power rectifiers and filter, current-monitoring resistors,

an output stage, a voltage gain stage, an overvoltage SCR, and an output filter.

The ac input rectifier and filter converts ac input to a dc level. The output stage regulates this dc level at the output

of the power supply. The output stage has up to four parallel NPN transistors mounted on a heatsink and connected

between the +Rail and the +Output. These transistors are driven to conduct by a positive-going signal from driver

Q303 (located in the voltage gain stage). The output stage also has up to four parallel PNP transistors mounted on a

heatsink and connected between the +Rail and the -Rail. These transistors are driven to conduct by a negative-going

signal from driver Q304 (located in the voltage gain stage).

The voltage gain stage is controlled by a signal from the control circuits. A positive-going signal to the voltage gain

stage makes the output more positive. A negative-going signal to the voltage gain stage makes the output more

negative. The Turn-on control signal to the voltage gain stage simply keeps the output of the unit turned off for about

100 milliseconds at power turn-on while the microprocessor is initializing the unit.

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Principles of Operation - 4

Figure 4-2. A1 Block Diagram

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4 - Principles of Operation

Two current shunt resistors monitor the output current. RmHi (R473) monitors the high current range; RmLo (R403)

monitors the low current range. Shunt clamps, connected in parallel across RmLo, turn on at approximately 25 mA to

limit the voltage drop at high currents. The Range_Select signal sets the level at which switching occurs. The output

of the current monitor drives the level.

The SCR, connected across the output, will fire and short the output when an overvoltage condition is detected. The

SCR is controlled by the OV_SCR* signal from the crowbar control circuit (described in the next section).

The output filter capacitor provides additional filtering of the dc output.

Control Circuits

As shown in Figure 4-2, the control circuits consist of the CV/CC controls, output voltage/current monitor, bias

supplies, and SCR control.

The CV/CC control circuits provide a CV control loop, a positive CC control loop, and a negative CC control loop.

For any value of load resistance, the supply must act either as a constant voltage (CV) or as a constant current (CC)

supply. Transfer between these modes is accomplished automatically by the CV/CC control circuit at a value of load

resistance equal to the ratio of the programmed voltage value to the programmed current value. The negative CC

control circuit is activated when a current source such as another power supply is connected across the output

terminals and its voltage is greater than the programmed voltage. A low level CV_Detect*, CC_Detect*, or

CCN_Detect* signal is returned to the secondary interface to indicate that the corresponding mode is in effect.

When the CV loop is in control, diode D328 is conducting current. Voltage regulation is accomplished by comparing

the programmed voltage signal CV_Prog with the output voltage monitor signal Vmon. The Vmon signal is in the 0

to +5 V range, which corresponds to the zero to full-scale output voltage range of the supply. If the output voltage

exceeds the programmed voltage, Vmon goes high and produces a more negative-going CV signal, which reduces

the input to the voltage gain stage and lowers the output voltage. Conversely, if the output voltage is less than the

programmed voltage, Vmon goes low and produces a more positive-going CV signal, which increases the input to

the voltage gain stage and raises the output voltage. Depending upon the position of the sense switch, the output

voltage is either monitored at the supply's output terminals (local), or at the load (remote) using the +S and -S

terminals with remote sense leads connected to the load. If the output voltage goes higher than the programmed

value, the unit starts sinking current to reduce the output voltage.

When the CC loop is in control, diode D325 is conducting current. Current regulation is accomplished by comparing

the programmed current signal CC_Prog with the output current monitor signal Imon_H. The Imon_H signal is

produced by measuring the voltage drop across the current monitoring resistor and is in the 0 to +5 V range, which

corresponds to the zero to full-scale output current range of the supply. If the output current exceeds the

programmed current, Imon_H goes high and produces a more negative going CC signal, which reduces the input to

the voltage gain stage and lowers the output current. Conversely, if the output current is less than the programmed

current, Imon_H goes low and produces a more positive-going CC signal, which increases the input to the voltage

gain stage and raises the output current.

When the supply is sinking current, only the CV control circuit or the CCN control circuit can be active. In this case,

the supply is acting as a load instead of a power source and will attempt to pull the output voltage down by drawing

off current from the externally applied source. The current that will be drawn from the externally supplied source is

determined by the CC_Prog signal. When the current required to reduce the voltage is less than the programmed

current value, the CV control circuit is active and regulates the output voltage. When the current required to reduce

the voltage exceeds the programmed current value, the CCN control circuit is active. It regulates the output current

by comparing the negative Imon_H signal to the inverted CC_Prog signal.

During operation, a PM_Inhibit signal will cause the turn-on control to turn off the bias to the voltage gain stage and

shut down the output if any of the following occur:

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Principles of Operation - 4

The output is programmed off.

An overvoltage condition is detected (OV_Detect* signal is received).

The line voltage falls below 90 volts (approximately).

Current readback is provided by three separate circuits. The previously discussed high range current signal (Imon_H)

returns the high range current measurement. When the unit is operating in the low current readback mode, a separate

low range current shunt and amplifier provides low-current readback via the Imon_L signal. The Range_Select signal

drives shunt clamps Q304 and Q305, which clamp the voltage across RmLo to approximately 1.8 V. A third current

readback circuit is available on the Agilent 66332A unit. It consists of a high bandwidth current amplifier that

returns dynamic current measurements from the output filter capacitor via the Imon_P signal. Note that the Imon_H

and the Imon_P signal are combined to return the actual output current measurement.

An overvoltage detect circuit compares the output voltage to the programmed overvoltage setting. When the output

exceeds the programmed setting, the OV_Detect* signal goes low, which informs the logic array that an OV

condition has occurred. The crowbar control circuit is enabled when the OV_SCR* signal is received. When an

overvoltage condition occurs, the SCR control circuit generates the OV signal, which causes the following actions to

occur:

1. The SCR fires, shorting the supply's output.

2. The microprocessor circuits are notified of the OV condition (OV_Detect* is low) in order to program the

output off, turn off the gain stage bias, and update the status of the unit.

3. When a output protection clear command is executed, the microprocessor circuits resets the OV circuits,

turns on the gain stage bias, and programs the output to its previous level.

The fan driver control circuit provides the DC voltage to operate the cooling fan. The Fan_Prog signal from the

secondary interface circuit varies this voltage according to the ambient and heatsink temperature as well as the output

voltage and current of the supply.

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Replaceable Parts List

Introduction

This section lists the replaceable parts for Agilent Models 66332A, 6632B, 6633B, and 6634B

power supplies. Refer to Figures 5-1 for the location of mechanical parts with the reference

designators MP. Refer to the board location diagrams in Chapter 6 for the location of electrical

parts.

Table 5-1. Chassis, Electrical

Designator

W10

W11

W15

Model

66332A/6632B

6633B

6634B

66332A

6632B/6633B/6634B

All

6633B/6634B

66332A/6632B

All

Part_Number

5063-3431

06633-61023

06634-61023

5063-3439

5063-3429

5063-3432

5063-3406

06611-60022

5063-3433

5063-3434

06632-60002

9100-5501

9100-5567

9100-5568

3101-2862

06612-80001

06612-80002

06632-80004

06612-80008

06612-80003

5080-2452

5080-2448

5080-2457

06612-80010

8120-4383

8120-1350

8120-1369

8120-1689

8120-0698

8120-2104

8120-2956

8120-4211

8120-4753

Qty

Description

Control PCA, Tested

Interface PCA, Tested

Front Panel PCA, Tested

Binding Post PCA

AC Input/RFI PCA

Relay PCA, Tested

Fan Assembly

Main Transformer

Rocker Switch (AC Line)

Cable (A5 to S1)

All

66332A/6632B

6633B

6634B

All

Cable (S1 to T1)

Cable (T1 to A1J303)

Cable (T1 to A1 J304/J305)

T1 Jumper

Cable (A1 to A2 J206)

Cable (A1 to A2 J207)

Cable (A2 J210 to A6 J610)

Cable (A2 J211 to A3 J111)

Cable (A1 J314 to A4 J615)

Line Cord, Standard (Option 903)

Line Cord, Option 900

Line Cord, Option 901

Line Cord, Option 902

Line Cord, Option 904

Line Cord, Option 906

Line Cord, Option 912

Line Cord, Option 917

Line Cord, Option 918

All

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5 - Replaceable Parts

Table 5-2. Chassis, Mechanical

Part Number Qty Description

Designator

MP1

Model

All

06612-00002

5063-3426

5063-3443

0370-3238

06612-40001

1510-0091

66332-80001

06632-80019

06633-80002

06634-80002

5001-9847

5041-8819

5041-8820

5062-3702

06624-20007

1252-1488

06611-40006

5020-2859

06612-20002

0515-0433

1400-1826

06612-20001

06612-80004

5041-8801

0515-1117

0515-1132

06612-00005

06612-00004

2950-0144

0590-0305

5001-0538

0380-0644

2190-0034

3050-0849

5001-6788

5001-6787

1400-1281

0515-0380

0515-1946

0515-2535

0515-0374

0535-0031

0460-2362

0380-2086

8160-0916

1252-3056

5962-0872

5962-8108

Chassis

MP2

MP3

MP4

MP5

MP6

MP7

MP8

MP9

All

Front Panel Assy, Std unit

Front Panel Assy, Option 020

Knob, 6mm

Keypad

All

Binding Post, Single, Red

Nameplate (66332A)

Nameplate (6632B)

Nameplate (6633B)

Nameplate (6634B)

Top Cover

Strap Handle Cap, front

Strap Handle Cap, rear

Strap Handle

Barrier Block Cover

Terminal Block, 4 Position, RI/DFI

Fan Spacer (G10)

Main Heat Sink

66332A

6632B

6633B

6634B

All

MP10

MP11

MP12

MP13

MP14

MP15

MP16

MP17

MP18

MP19

MP20

MP21

MP22

MP23

MP24

MP25

MP26

MP27

MP28

MP29

MP30

MP31

MP32

MP33

MP34

MP35

MP36

MP37

MP38

MP39

MP40

MP41

MP42

Thermal Insulator

15 Screw M4x0.7x8mm, Torx T15, Pan, Conical washer

Spring Clip

Insulator

Rear Label

Foot

Screw M5x0.8x10mm, Pozi, Flat, Patch Lock

Screw M5x0.8x10mm Pozi, Pan, Patch Lock

Relay Option Bracket

Binding Post Plate

Nut, Hex 3/8-32 Nylon

Nut, Hex w/Lockwasher 6-32

Side Trim

Stud Mounted Standoff

Washer, Helical Lock #10

Washer, Flat #10

Transformer Bracket

Transformer Shim

Cable Clip

10 Screw M4x0.7x10mm, Torx T15, Pan, conical washer

Screw M3x0.5x6mm, Torx T10, Flat, Patch Lock

Screw, M3x0.5x8mm, Torx T10, Thread Rolling

Screw M3x0.5x10mm, Torx T10, Pan, conical washer

Nut, Hex w/lockwasher, M3x0.5

Foam Pad

Standoff, snap-in

RFI Clip

Screw Lock Kit (ref RS232 Connector)

Operating Guide

Programming Guide

All

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Replaceable Parts - 5

Figure 5-1. Mechanical Parts ldentification

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5 - Replaceable Parts

Table 5-3. A1 Control Board PC Board Assembly

Designator

C300

C301

C303

C304

C305

C306

C307

C308, 309

C310

C311, 312

C313

C314

C315, 316

C317

C318, 319

C320

C321

C322

C323

C324

C325 - 327

C328

C330

C331, 332

C333

C334

C335

C336

Model

66332A/6632B

6633B

6634B

66332A/6632B

All

66332A/6632B

6633B

6634B

66332A/6632B

All

66332A/6632B

All

66332A/6632B

6633B

6634B

66332A/6632B

All

Part Number

5063-3431

06633-61023

06634-61023

0160-5422

0180-4756

0180-4815

0180-4816

0160-5422

0180-2980

0180-4033

0160-5422

0180-4818

0160-5422

0180-4819

0180-4817

0180-4818

0160-5422

0180-4129

0180-4136

0180-4129

0160-5422

0160-4831

0180-4129

0160-5422

0160-5098

0160-4832

0160-4830

0160-5644

0160-5422

0160-4835

0160-7001

0160-5410

0160-4834

0160-4812

0160-5422

0160-6836

0160-5422

0160-4833

Qty

Description

Control PCA, Tested

Cap 0.047 uF 20%

Cap 18,000 uF 50V

Cap 2200 uF 160V

Cap 1200 uF 250V

Cap 0.047 uF 20%

Cap 1000 uF 50V

Cap 2200 uF 35 V

Cap 0.047 uF 20%

Cap 8200 uF 16V

Cap 0.047 uF 20%

Cap 33,000 uF 25V

Cap 18,000 uF 16V

Cap 8200 uF 16V

Cap 0.047 uF 20%

Cap 1 uF 35V

Cap 10 uF 20V

Cap 1 uF 35V

Cap 0.047 uF 20%

Cap 4700 pF 10%

Cap 1 uF 35V

Cap 0.047 uF 20%

Cap 0.22 uF 10%

Cap 0.01 uF 10%

Cap 2200 pF 10%

Cap 0.033 uF 10%

Cap 0.047 uF 20%

Cap 0.1 uF 10% 50V

Cap 3300 pF 100V

Cap 3300 pF

66332A/6632B

6633B/6634B

66332A/6632B

6633B

6634B

All

6634B

Cap 0.047 uF 10%

Cap 220 pF 5%

C337 - 339

C340

C341 - 343

C344

C345

Cap 0.047 uF 20%

Cap 0.01 uF 250V

Cap 0.047 uF 20%

Cap 0.022 uF

All

66332A/6632B

6633B/6634B

All

Not loaded

C346

C347

C348

66332A/6632B

6633B/6634B

All

0160-5422

0160-4833

0160-6827

0160-5422

Cap 0.047 uF 20%

Cap 0.022 uF

Cap 0.022 uF 400V

Cap 0.047 uF 20%

All

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Replaceable Parts - 5

Designator

C349

C350

C351

C352

C353, 354

C355

C356

C357

C358

C359

C360

C361

C362

C363

C364

C365

C366, 367

C368

C369

C370

C371

C372, 373

C374

C375

C376

C377

C378

C379

C380

C381

C382

C383

C384

C386

Model

66332A/6632B

6633B/6634B

All

Part Number

0160-4791

0160-4807

0160-5422

0160-4791

0160-4807

0160-5422

0160-4835

Qty

Description

Cap 10 pF 5% 100V

Cap 0.033 uF

Cap 0.047 uF 20%

Cap 10 pF 5% 100V

Cap 0.033 uF

Cap 0.047 uF 20%

Cap 0.1 uF 10% 50V

Not loaded

All

66332A/6632B

6633B/6634B

All

66332A/6632B

6633B/6634B

All

0160-4801

0160-4791

0160-4787

0160-4791

0160-4789

0160-4791

0160-4807

0160-4813

0160-4812

0160-4800

0160-4807

0160-5422

0160-5471

0160-4791

0160-4789

0160-6827

0160-5422

0160-4812

0160-5422

Cap 100 pF 5%

All

Cap 10 pF 5% 100V

Cap 22 pF 5% 100V

Cap 10 pF 5% 100V

Cap 15 pF 5% 100V

Cap 10 pF 5% 100V

Cap 33 pF 5% 100V

Cap 180 pF 5%

66332A/6632B

6633B/6634B

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

All

Cap 220 pF 5% 100V

Cap 120 pF 5%

Cap 33 pF 5% 100V

Cap 0.047 uF 20%

Cap 0.1 uF 5% 50V

Cap 10 pF 5% 100V

Cap 15 pF 5% 100V

Cap 0.022 uF 400V

Cap 0.047 uF 20%

Cap 220 pF 5%

Cap 0.047 uF 20%

Cap 3300 pF 5%

Cap 0.047 uF 20%

Cap 0.022 uF 20%

Cap 6800 pF 20%

Cap 0.047 uF 20%

Cap 0.022 uF 20%

Cap 6800 pF 20%

Cap 0.047 uF 20%

Cap 4700 pF

All

66332A/6632B

All

66332A/6632B/6633B 0160-5410

6634B

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

66332A/6632B

All

0160-5422

0160-4918

0160-6616

0160-5422

0160-4918

0160-6616

0160-5422

0160-8153

0180-4129

0160-8153

0160-8231

0160-8299

0160-8230

0160-5469

0160-4789

0160-4787

All

Cap 1 uF 35V

Cap 4700 pF

Cap-MET 100 uF

Cap 50 uF 70V

Cap 22 uF 150V

Cap 1 uF 10% 50V

Cap 15 pF 5% 100V

Cap 22 pF 5% 100V

66332A/6632B

6633B

6634B

66332A/6632B

All

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5 - Replaceable Parts

Designator

C403

C405

C411

C420

C421

C422

C423

C424

C425

C426

C427

Model

66332A/6632B

All

6633B/6634B

6633B

6634B

6633B

6634B

6633B

6634B

6633B/6634B

6634B

6633B/6634B

6633B

Part Number

0160-4791

0160-3454

0160-7277

0160-6800

0160-6180

0160-7336

0160-6804

0160-7568

0160-6180

0160-7336

0160-4822

0160-6806

0160-0157

0160-6803

0160-5847

0160-5422

0160-6800

0180-4129

0160-4801

0160-7562

5060-3234

1205-0571

1884-0310

1901-0987

5060-3234

1205-0571

1884-0310

1901-0987

5060-3251

1884-0316

1205-0571

1901-0731

1901-1098

1901-0731

1901-1098

5060-3378

1901-1383

1205-0282

1901-1130

5060-3228

1901-0987

1205-0282

1901-1130

5060-3228

1901-0987

1205-0282

Qty

Description

Cap 10 pF 5% 100V

Cap 220 pF 1KV

Cap 2.2 uF

Cap 0.022 uF 20%

Cap 1000 pF 20%

Cap 220 pF 20%

Cap 0.047 uF 20%

Cap 0.0047 uF 10%

Cap 1000 pF 20%

Cap 220 pF 20%

Cap 1000 pF

Cap 0.1 uF

Cap 4700 pF

C428 - 430

C431, 432

C480, 481

C482

C496, 497

C498

Cap 0.047 uF 250v 20%

Cap 0.22 uF

Cap 0.047 uF 20%

Cap 0.022 uF 20%

Cap 1 uF 35V

All

6633B/6634B

All

66332A/6632B

Cap 100 pF 5%

Cap 6.8 uF 63 V

C499

CR342

SCR/Rectifier Assembly (CR342/D330)

ref CR342 Heat Sink

ref CR342 SCR MCR69-3

ref CR342 Power Diode D330

SCR/Rectifier Assembly (CR342/D330)

ref CR342 Heat Sink

ref CR342 SCR MCR69-3

ref CR342 Power Diode D330

SCR/Heatsink Assembly

ref CR342 SCR 2N6402

ref CR342 Heat Sink

Diode

CR342

6633B

6634B

D300 - 303

D304

D305, 306

D307

All

Diode

D308

66332A/6632B

Rectifier Assembly

ref D308 Power Diode

ref D308 Heat Sink

Diode

Rectifier Assembly

ref D309 Rectifier

ref D309 Heat Sink

Diode

D308

D309

6633B/6634B

66332A/6632B

D309

D310

6633B/6634B

66332A/6632B

Rectifier Assembly

ref D310 Rectifier

ref D310 Heat Sink

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Replaceable Parts - 5

Designator

D310

D311

Model

6633B/6634B

66332A/6632B

Part Number

1901-1130

5060-3378

1205-0282

1901-1383

1901-1130

1901-1098

1901-0731

1901-0050

1901-0719

1901-1080

1901-1098

1901-1080

1901-1098

1901-0050

1901-0033

1901-0050

1901-0033

1901-0050

1901-0033

Qty

Description

Diode

Rectifier Assembly

ref D311 Heat Sink

ref D311 Power Diode

Diode

Power Diode

Diode

D311

D312

D313, 314

D315

D316

D317

D318

D319 - 321

D322

D323, 324

D325

D326

D327, 328

D329

D330

D335

D336, 337

D400

D470, 471

D499

6633B/6634B

All

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

All

Diode

66332A/6632B/6633B 1901-0987

66332A/6632B

All

6634B

All

66332A/6632B/6633B 1901-0987

All 2110-0712

66332A/6632B/6633B 2110-0697

6634B 2110-0685

66332A/6632B/6633B 2110-0697

Power Diode (See CR342)

Zener Diode 6.2V 5%

Diode

1902-0953

1901-0880

1901-0719

1902-0960

Diode, Power

Zener Diode 12V 5%

Power Diode (See Q314)

Fuse, Submin 4AM, 125V

Fuse, Submin 15AM, 32V

Fuse, Submin 7AM, 125V

Fuse, Submin 15AM, 32V

Fuse, Submin 7AM, 125V

Fuse, Submin 5AM, 125V

Fuse 8AM 32V

Res Fusible 0.5 Ohm 5W

ref F305 Fuseholder Clips

Replaced by track on all models

Connector

Barrier Block

Connector

AC Line Module

Coil 22 uH 10%

F300, 301

F302

F303

F304

F305

6634B

All

2110-0685

2110-0699

66332A/6632B/6633B 2110-0777

6634B

All

0811-3776

2110-1107

Not Used

F400, 406

F401-405, 407 All

J303

J304

J305

J307

J309

J314

66332A/6632B

Not Used

All

1252-0063

1251-6832

1252-0063

1252-5977

0360-2609

1252-0056

1252-0063

1252-3771

9140-0115

J414

J508

L300, 301

66332A/6632B

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5 - Replaceable Parts

Designator

Q300

Model

All

Part Number

5060-3245

1854-0828

1205-0282

Qty

Description

Darlington Fan Driver Assembly

ref Q300 Transistor,NPN SI

ref Q300 Heat Sink

Transistor, NPN

All

Q301

Q302

Q303

66332A/6632B/6633B 1854-0474

6634B 1854-0575

66332A/6632B/6633B 1854-0474

6634B

66332A/6632B

1854-0575

06612-60008

1854-0872

1205-0350

06633-60009

1854-0920

1205-0571

06634-60009

1205-0571

1854-0838

06612-60009

1205-0350

1853-0497

5063-3451

1853-0652

1205-0571

5063-3451

1853-0652

1205-0571

1858-0054

1853-0336

1853-0086

1854-1174

1854-1362

1854-1174

1854-1362

1853-0656

1853-0772

1853-0656

1853-0772

1854-1174

06612-60006

1855-0831

1205-0350

06612-60005

0590-0199

1855-0726

1205-0350

0340-0950

2200-0143

1901-0987

Transistor, NPN

Transistor Driver Assembly

ref Q303 Transistor, NPN

ref Q303 Heat Sink

Assembly, Transistor/Heat Sink

ref Q303 Transistor, NPN

ref Q303 Heat Sink

Transistor/HS Assembly

ref Q303 Heat Sink

ref Q303 Transistor, NPN

Transistor Driver Assembly

ref Q304 Heat Sink

ref Q304 Transistor, PNP

Assembly, Transistor/Heat Sink

ref Q304 Transistor PNP Q304

ref Q304 Heat Sink

Transistor/HS Assembly

ref Q304 Transistor PNP Q304

ref Q304 Heat Sink

Transistor Array

Transistor, PNP

Transistor, NPN

Transistor, PNP

Transistor, NPN

FET Assembly

ref Q313 MOSFET N-Chan

ref Q313 Heat Sink

FET/Diode Assembly

ref Q314 Hex Nut w/ Lockwasher

ref Q314 MOSFET P-Chan

ref Q314 Heat Sink

ref Q314 Insulator

Q303

Q304

6633B

6634B

66332A/6632B

6633B

6634B

Q305

Q306

Q307

Q308

Q309

Q310

Q311

Q312

Q313

All

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

66332A/6632B

All

Q314

ref Q314 Mach Screw 4-40

ref Q314 Diode (D499)

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Replaceable Parts - 5

Designator

Q315

Q316

Q317

Q318

Q319

R300

R301

R302

R303

R304

R305

R306

R307 - 309

R310

R311

R312

R313

R314

R315

R316

R317, 318

R319

R320

R321

R322

R323

R324

R325

Model

Part Number

1854-1174

1854-1362

1855-1016

1853-0656

1853-0772

1858-0074

1853-0656

Qty

Description

66332A/6632B

6633B/6634B

All

66332A/6632B

6633B/6634B

All

66332A/6632B

66332A/6632B/6633B 0698-3642

6634B

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

All

Transistor, NPN

Transistor, FET

Transistor, PNP

Transistor Array

Transistor, PNP

Res 3K 5% 2W MO

Res 33K 5% 2W MO

Res 121 Ohm 1% 0.125W

Res 511 1% 0.125W

Res 2k 1% 0.125W

Res 121 Ohm 1% 0.125W

Res 511 1% 0.125W

Res 2k 1% 0.125W

Res 1K 1% 0.125W

Res 4.99K 1%

0764-0046

0757-0403

0757-0416

0757-0283

0757-0403

0757-0416

0757-0283

0757-0280

0698-3279

0698-4202

0757-0280

0757-0442

0698-3156

0686-2225

0698-0092

0683-0475

0757-0346

0757-0442

8159-0005

0757-0401

8159-0005

0698-3444

0757-0416

0757-0420

0757-0427

0698-0085

0757-0280

0698-4509

0698-3454

0698-4536

0757-0280

0757-0438

0698-3156

0757-0280

0757-0438

0757-0280

0698-3156

0757-0438

Res 8.87K 1%

Res 1K 1% 0.125W

Res 10K 1% 0.125W

Res 14.7K 1%

Res 2.2K 5% 0.5W

Res 2.61K 1%

Res 4.7 Ohm 5% 0.25W

Res 10 1%

Res 10K 1% 0.125W

Jumper

Res 100 Ohm 1% 0.125W

Jumper

Res 316 Ohm 1% 0.125W

Res 511 1%

Res 750 1%

Res 1.5K 1% 0.125W

Res 2.61k 1%

Res 1k 1%

Res 80.6K 1%

Res 215k 1%

Res 340k 1%

Res 1K 1% 0.125W

Res 5.11K 1%

Res 14.7K 1%

Res 1K 1% 0.125W

Res 5.11K 1%

All

66332A/6632B

6633B/6634B

All

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

All

66332A/6632B

6633B

6634B

66332A/6632B

6633B/6634B

66332A/6632B

6633B

Res 1K 1% 0.125W

Res 14.7K 1%

Res 5.11K 1%

6634B

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5 - Replaceable Parts

Designator

R326

R327

R328

R329

R330

R331

R332

R333

R334

R335

R336

R337

R339

R340

R341

R342

R343

R344

R345

R346

R347

R348

R349

R350

Model

Part Number

0757-0200

0698-3159

0757-0280

0683-0475

0757-0346

0757-0449

0757-0453

0757-0458

0757-0280

0698-3156

0757-0280

0757-0199

0757-0438

0757-0441

8159-0005

0757-0438

0757-0280

Qty

Description

Res 5.62K 1%

Res 26.1K 1%

66332A/6632B

6633B/6634B

All

66332A/6632B

6633B/6634B

66332A/6632B

6633B

Res 1K 1% 0.125W

Res 20K 1% 0.125W

Res 10 1%

Res 4.7 Ohm 5% 0.25W

Res 30.1K 1%

Res 51.1K 1%

Res 1K 1% 0.125W

Res 14.7K 1%

Res 1K 1% 0.125W

Res 21.5K 1%

Res 5.11K 1%

Res 8.25K 1%

Jumper

6634B

66332A/6632B

6633B/6634B

All

66332A/6632B

6633B/6634B

66332A/6632B

All

Res 5.11K 1%

All

Res 1K 1% 0.125W

Res 316 Ohm 1% 0.125W

Res 750 1% 0.125W

Res 10K 1% 0.125W

Res 51.1k 1% 0.125W

Res 215K 1% 0.125W

Res 200 Ohm 1% 0.125W

Res 432 1% 0.125W

Res 1K 1% 0.125W

Res 215 Ohm 1%

Res 432 1% 0.125W

Res 1K 1% 0.125W

Res 80.6K 1%

Res 287K 1% 0.125W

Res 464K 1% 0.125W

Res 215 Ohm 1%

Res 432 1% 0.125W

Res 1K 1% 0.125W

Res 10K 1% 0.125W

Res 1K 1% 0.125W

Res 10K 1% 0.125W

Res 51.1K 1%

Res 316 Ohm 1% 0.125W

Res 632 1%

Res 1.5K 1%

Res 26.1K 1%

Res 80.6K 1%

Res 130K 1%

Res 3.16K 1%

Res 3.92K 1%

Res 3.16K 1%

66332A/6632B/6633B 0698-3444

6634B

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

All

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

0757-0420

0757-0442

0757-0458

0698-3454

0757-0407

0757-0414

0757-0280

0698-3441

0757-0414

0757-0280

0698-4509

0698-3456

0698-3260

0698-3441

0757-0414

0757-0280

0757-0442

0757-0280

0757-0442

0757-0458

0698-3444

0698-4187

0757-0427

0698-3159

0698-4509

0757-0468

0757-0279

0757-0435

0757-0279

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Replaceable Parts - 5

Designator

R351

R352

R353

R354

R355

R356

R357

R358

R359

R360, 361

R362

R363

R364

R365, 366

R367

R370

R371

R372

R373

R374

R375

R376

R377

R378

R379

R380

R381

R382

R383

R384

R385

Model

66332A/6632B

6633B

6634B

66332A/6632B

All

66332A/6632B

6633B

6634B

Part Number

0698-6320

0698-5087

0698-6320

8159-0005

0698-8959

0757-0447

0757-0458

0698-4509

0698-0084

0757-0472

0757-0270

0757-0472

0699-2246

0699-1510

Qty

Description

Res 5K 0.1%

Res 6.2K 1%

Res 5K 1%

Jumper

Res 619K 1%

Res 16.2K 1%

Res 51.1K 1%

Res 80.6K 1%

Res 2.15K 1%

Res 200K 1%

Res 249K 1%

All

66332A/6632B

6633B

6634B

66332A/6632B

6633B/6634B

All

66332A/6632B

All

66332A/6632B

6633B/6634B

All

66332A/6632B

6633B/6634B

All

Res 200K 1%

Res 25K 0.05%

Res 22.22K 0.05%

Not loaded

Jumper

Res 25K 0.05%

Res 39K 0.1%

Res 40K 0.05%

Res 221K 1%

Res 25K 0.05%

Res 22.22K 0.05%

Res 22K 0.1% 0.125W

Res 4.32K 1%

Res 10K 1% 0.125W

Res 35.65K 0.1%

Res 25K 0.05%

Res 2.5K 0.1% 0.1W

Res 3.2K 0.1% 0.1W

Res 100 Ohm 1% 0.125W

Res 51.1K 1%

8159-0005

0699-2246

0698-8807

0699-1513

0757-0473

0699-2246

0699-1510

0698-6392

0757-0436

0757-0442

0699-0934

0699-2246

0699-0236

0699-1867

0757-0401

0757-0458

All

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

66332A/6632B

All

Not loaded

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

All

0699-0934

0699-2246

0698-8807

0699-1513

0698-3634

0698-3642

0757-0436

0757-0401

0698-8959

0757-0401

0698-3460

0811-1672

0811-2553

0699-0236

0699-1867

Res 35.65K 0.1%

Res 25K 0.05%

Res 39K 0.1%

Res 40K 0.05%

Res 470 Ohm 5% 2W

Res 3K 5% 2W MO

Res 4.32K 1%

Res 100 Ohm 1% 0.125W

Res 619K 1% 0.125W

Res 100 Ohm 1% 0.125W

Res 422K 1%

Res 3.3 Ohm 5% 2W

Res 7.5 Ohm 5% 2W PW

Res 2.5K 0.1% 0.1W

Res 3.2K 1% 0.125W

66332A/6632B

6633B

66332A/6632B

6633B/6634B

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5 - Replaceable Parts

Designator

R386

R387

R388

R389

R390, 391

R392

R393

R394

R395, 396

R397

R398

R399

R400, 401

R402

R403

R404

R405

R406

R407

R408

R409

R410

R411

R412

R413

R414

R415

R416

R417

R418

R419

R420

Model

Part Number

0811-1672

0811-2553

0811-1672

0811-2553

0757-0442

0811-1672

0811-2553

0698-8834

0698-6320

0698-6348

Qty

Description

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

All

66332A/6632B

6633B

All

66332A/6632B

6633B/6634B

66332A/6632B/6633B 0698-6360

6634B

66332A/6632B

6633B

6634B

All

6634B

All

66332A/6632B

All

66332A/6632B

6633B

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

66332A/6632B

6633B

66332A/6632B/6633B 8159-0005

66332A/6632B/6633B 0698-3454

6634B

Res 3.3 Ohm 5% 2W

Res 7.5 Ohm 5% 2W PW

Res 3.3 Ohm 5% 2W

Res 7.5 Ohm 5% 2W PW

Res 10K 1% 0.125W

Res 3.3 Ohm 5% 2W

Res 7.5 Ohm 5% 2W PW

Res 9K 0.1% 0.125W

Res 5K 0.1%

Res 3K 0.1% 0.125W

Res 10K 0.1%

Res 4.45K 0.1% 0.1W

Res 100K 0.1%

Res 200K 0.1% 0.1W

Res 164K 0.1% 0.1W

Res 2.7K 0.1%

Res 3K 2W

Res 10K 1% 0.125W

Res 12.5K 0.1%

Res 10K 1% 0.125W

Res 5.11K 1%

Res 72 Ohm

Res 10K 1% 0.125W

Res 1M 1% 0.125W

Res 287K 1%

Res 3.3 Ohm 5% 2W

Res 7.5 Ohm 5% 2W PW

Res 3.3 Ohm 5% 2W

Res 7.5 Ohm 5% 2W PW

Res 3.3 Ohm 5% 2W

Res 7.5 Ohm 5% 2W PW

Res 3.3 Ohm 5% 2W

Res 7.5 5% 2W PW

Jumper

0698-8865

0698-6358

0698-6376

0698-7841

0699-1866

0698-3642

0757-0442

0698-6533

0757-0442

0757-0438

0699-4484

0757-0442

0698-8827

0698-3456

0811-1672

0811-2553

0811-1672

0811-2553

0811-1672

0811-2553

0811-1672

0811-2553

Res 215K 1%

Res 383K 1%

Res 10K 1% 0.125W

Res 1.2M 1%

Res 22K 0.1% 0.125W

Res 22.22K 0.1%.125W

Res 750 Ohm 5% 0.5W

Res 10K 1% 0.125W

Res 51.1K 1%

Res 80K 1%

Res 160K 1%

Res 10K 1% 0.125W

Res 1.74M 0.1% 0.125W

0698-3459

0757-0442

0699-0088

0698-6392

0699-1510

0686-7515

0757-0442

0757-0458

0698-3201

0698-5092

0757-0442

0699-1972

66332A/6632B

All

66332A/6632B

6633B/6634B

All

66332A/6632B

6633B

6634B

All

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Replaceable Parts - 5

Designator

R421

R422

R423

R425

R427

R428

R429

R430

R431

R432

R433

R434

R435

R436, 437

R438

R439

R440

R441

R442

R443

R444

R445

R446

R447

R448

R449

R450

R451

R452

R453

R454

Model

66332A/6632B

6633B

66332A/6632B

66332A/6632B/6633B 0699-0267

Part Number

0811-1672

0811-2553

0698-6351

Qty

Description

Res 3.3 Ohm 5% 2W

Res 7.5 Ohm 5% 2W PW

Res 133K 0.1%

Res 10K 0.05%

Res 15K 0.05% 0.1W

Res 402K 1%

Res 10K 1% 0.125W

Jumper

Res 3K

Res 10K 0.05%

Res 15K 0.05% 0.1W

Res 52.3K 1%

Res 5.11K 1%

Res 1K 1% 0.125W

Res 2.15K 1%

Res 5.11K 1%

Res 139 Ohm 1% 0.125W

Jumper

Res 3.3 Ohm 5% 2W

Jumper

Res 500 Ohm 0.1%

Res 3.3 Ohm 5% 2W

Res 7.5 5% 2W PW

Res 24.9K 1%

Res 40K 0.05%

Res 100K 0.05% 0.1W

Res 300K 0.05% 0.1W

Res 40K 0.05%

Res 100K 0.05% 0.1W

Res 300K 0.05% 0.1W

Res 5.11K 1%

6634B

0699-0278

0698-4539

0757-0442

8159-0005

0698-3642

66332A/6632B

6633B/6634B

6634B

66332A/6632B/6633B 0699-0267

6634B

66332A/6632B

All

66332A/6632B

6633B

0699-0278

0757-0272

0757-0438

0757-0280

0698-0084

0757-0438

0698-4099

8159-0005

0811-1672

8159-0005

0698-6317

0811-1672

0811-2553

0698-4486

0699-1513

0699-3416

0699-3448

0699-1513

0699-3416

0699-3448

0757-0438

0811-0929

0812-0019

0811-1220

0698-6631

0698-8863

0699-0489

0698-4123

8159-0005

0698-8812

8159-0005

0757-0280

0698-0084

0757-0438

0698-6360

8159-0005

6634B

66332A/6632B

All

66332A/6632B

All

66332A/6632B

6633B/6634B

All

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

All

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

66332A/6632B

All

66332A/6632B

All

66332A/6632B

6633B

6634B

Res 0.51 Ohm 5% 2W

Res 0.33 5% 2W PW

Res 1.5 5% 2W PW

Res 2.5K 0.1%

Res 5.2K 0.1%

Res 16.1K 0.1%

Res 499 Ohm 1% 0.125W

Jumper

Res 1 Ohm 1% 0.125W

Jumper

Res 1K 1% 0.125W

Res 2.15K 1%

Res 5.11K 1%

Res 10K 0.1%

Jumper

66332A/6632B

All

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5 - Replaceable Parts

Designator

R455

R456

R457

R458

R459

R460

R461

R462

R463

R464, 465

R466

R467, 468

R469

R470

R471

R472

R473

R474

R476

R477

R478, 479

R480, 481

R482

R483

R488

Model

66332A/6632B

6633B

6634B

Part Number

0698-6631

0698-8863

0699-0489

8159-0005

0698-6620

0757-0395

Qty

Description

Res 2.5K 0.1%

Res 5.2K 0.1%

Res 16.1K 0.1%

Jumper

All

66332A/6632B

All

66332A/6632B

All

66332A/6632B/6633B 0757-0416

6634B

All

Jumper

Res 150K 0.1%

Res 56.2 Ohm 1%

Res 511 Ohm 1% 0.125W

Res 51.1 Ohm 1% 0.125W

Res 3K 2W

Res 2.15K 1%

Res 1 Ohm 1% 0.125W

Res 4.7 Ohm

0757-0394

0698-3642

0698-0084

0698-8812

0683-0475

0757-0379

0811-1672

0811-2553

0811-1672

0811-2553

0699-1797

0683-1065

0757-0442

0811-3770

0811-3771

0811-3772

8159-0005

0757-0281

0757-0199

0698-4444

0757-0269

0698-3226

0698-5089

0698-3922

0699-1744

0699-0070

0698-3922

0698-6950

0699-0070

0699-0730

0699-0070

0683-6855

0757-0438

0698-8812

0757-0289

0757-0433

66332A/6632B

6633B

6634B

Res 12.1 Ohm

66332A/6632B

6633B

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

All

66332A/6632B

6633B

6634B

All

Res 3.3 Ohm 5% 2W

Res 7.5 Ohm 5% 2W PW

Res 3.3 Ohm 5% 2W

Res 7.5 Ohm 5% 2W PW

Res 10M 5% 0.25W

Res 10M

Res 10K 1% 0.125W

Res 0.05 Ohm 1%

Res 0.25 Ohm 1%

Res 0.5 Ohm 1%

Jumper

Res 2.74K 1%

Res 21.5K 1%

Res 4.87K 1%

Res 270 Ohm 1% 0.125W

Res 6.49K 1%

Res 33K 1% 0.125W

Res 487K 0.1%

Res 280K 0.1%

Res 3.16M 1%

Res 487K 0.1%

Res 1.25M 0.1% 0.5W

Res 3.16M 1%

Res 1M 0.1%

Res 3.16M 1%

Res 6.8M 5%

Res 5.11K 1%

All

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

66332A/6632B

6633B

6634B

All

R488

R489

R490

R493

R494, 495

R496

Res 1 Ohm 1% 0.125W

Res 13.3K 1%

Res 3.32K 0.125W

66332A/6632B

6633B/6634B

R496

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Replaceable Parts - 5

Designator

R497

R498 - 500

R505

R510 - 517

R520

R521

R522

RT301

S300

T300

Model

66332A/6632B

6633B/6634B

All

6633B

66332A/6632B

6633B/6634B

All

Part Number

0757-0289

0757-0433

0757-0407

Not Used

0811-1672

Not Used

Qty

Description

Res 13.3K 1%

Res 3.32K 0.125W

Res 200 Ohm 1% 0.125W

Res 3.3 Ohm 5% 2W

Replaced by wire in 6633B/6634B units

All

Not Used

0837-0397

3101-2927

9100-4350

8159-0005

5060-3229

1826-0214

1205-0282

5063-2389

1826-1597

1205-0402

5060-2948

1205-0282

1826-0122

1826-1533

5060-3232

1826-0106

1205-0282

1826-0346

1826-1370

1826-1534

1826-3521

1826-2252

1826-3521

1826-1878

1826-3521

1826-1878

1826-0643

1902-0955

1902-0957

1902-3092

1902-0953

1902-0958

1902-0943

1902-0947

1902-0943

1902-0947

1902-0953

1902-0957

8159-0005

Thermistor

Switch, Right Angle Slide

Current Transformer

Jumper

66332A/6632B

6633B/6634B

All

T300

U300

-15V Regulator Assembly

ref U300 Integrated Circuit

ref U300 Heat Sink

+5V Regulator Assembly (Interface Bias)

ref U301 Integrated Circuit

ref U301 Heat Sink

+5V Regulator Assembly (Secondary Bias)

ref U302 Heat Sink

ref U302 Integrated Circuit

Integrated Circuit

+15V Regulator Assembly

ref U304 Integrated Circuit

ref U304 Heat Sink

Integrated Circuit

Zener Diode 9.1V 5%

Zener Diode 4.99V 5%

Zener Diode 6.2V 5%

Zener Diode 10V 5%

Zener Diode 2.4V 5%

Zener Diode 3.6V 5%

Zener Diode 2.4V 5%

Zener Diode 3.6V 5%

Zener Diode 6.2V 5%

Zener Diode 9.1V 5%

Jumper

U301

U302

U303

U304

U305

U306

U308

U309

U310

U311

U313

U314

All

66332A/6632B

All

U315

U400

VR300

VR301

VR302

VR303

VR304

VR305

VR335

W300, 301

6634B

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

66332A/6632B

6633B/6634B

All

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5 - Replaceable Parts

A2 Interface PCA, Tested for 66332A

A2 Interface PCA, Tested for 6632B/6633B/6634B

A3 Front Panel PCA Tested for all models

5063-3439

5063-3429

5063-3432

No user replaceable parts

Table 5-4. Binding Post Option #020

Part Number Qty Description

Designator

C603, 604

J615

MP5

MP26

MP25

MP24

W15

Model

6633B/6634B 5063-3406

66332A/6632B 06611-60022

Binding Post PCA

Cap 4700 pF

All

0160-8153

1252-0056

1510-0091

0590-0305

2950-0144

06612-00004

06612-80010

4 Pin Connector

Binding Post, Single, Red

Nut, Hex 6-32 w/Lockwasher

Nut, Hex 3/8-32 Nylon

Binding Post Plate

Cable (A1 J314 to A4 J615)

Table 5-5. A5 AC input/RFI Board

Designator

C500

C501, 502

F500

Model

All

Part Number

5063-3433

0160-4259

0160-8181

2110-0055

2110-0002

1252-3771

2110-0927

Qty Description

AC Input/RFI PCA

Cap 0.22 uF 10%

Cap 0.0022 uF

Fuse 4AM, 250V (100Vac and 120Vac input)

Fuse 2AM, 250V (220Vac and 230Vac input)

AC Line Module

J508

XF500

Fuseholder, with cap

Table 5-6. Relay Option #760

Qty Description

Designator

C600

C601, 602

F601, 602

J610

K601 - 603

K604, 605

R601, 602

R603

R604

R605

R606

R607

U601

W10

Model

All

Part Number

5063-3434

0160-5422

0150-0081

2110-0671

1252-7643

0490-1405

0490-1670

0686-2215

0698-3439

0757-0284

0698-3439

0757-0284

0698-3439

1858-0047

5080-2457

Relay PCA, Tested

Cap 0.047 uF 20%

Cap 0.01 uF

Fuse 0.125AM, 125V

Connector

Relay, 2C 12VDC

Power Relay

Res 220 Ohm 5% 0.5W

Res 178 Ohm 1% 0.125W

Res 150 Ohm 1% 0.125W

Res 178 Ohm 1% 0.125W

Res 150 Ohm 1% 0.125W

Res 178 Ohm 1% 0.125W

Transistor Array

Cable (A2 J210 to A6 J610)

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Diagrams

Introduction

This chapter contains drawings and diagrams for troubleshooting and maintaining the Agilent Model 66332A

Dynamic Measurement DC Source and the Agilent Model 66332A/6632B/6633B/6634B System DC Power

Supplies. Unless otherwise specified in the drawings, a drawing or diagram applies to all models and input voltage

options.

General Schematic Notes

a Components marked with an asterisk are model dependent (See Table 6-1).

a All resistors are in ohms 1%, 1/8 W, unless otherwise specified.

a All capacitors are in microfarads unless otherwise specified.

a Unless otherwise noted, bias connections to integrated-circuit packages are as follows:

Common

pin 7

pin 8

5 V

14-pin packages

16-pin packages

20-pin packages

pin 14

pin 16

pin 20

pin 10

Table 6-1. Model-dependent Components

Designator

66332A/

6632B

6633B

6634B

Designator

66332A/

6632B

6633B

6634B

C300, 304, 307 0.047 uF

C411

2.2 uF

C302

C313

C314-316

C331, 332

C333

C335

C340

C344, 346

C349, 352

C359

18000 uF

33,000 uF

0.047 uF

2200 pF

0.033 uF

3300 pF

2200 uF

18000 uF

1200 uF

8200 uF

C420, 421

C422, 424, 425

C423

C425

C426

0.022 uF

1000 pF

0.047 uF

1000 pF

0.022 uF

220 pF

0.0047 uF

1000 pF

0.1 uF

3300 pF

0.047 pF

0.01 uF

0.022 uF

0.033 uF

22 pF

C427

4700 pF

0.047 uF

C428-430

C431, 432

C482

C499

D319, 320, 321

D330

0.047 uF

0.22 uF

0.022 uF

0.047 uF

10 pF

33 pF

0.022 uF

0.033 uF

22 pF

0.022 uF

Diode

6.8 uF

Diode

C360

C361

15 pF

10 pF

Diode

C362

C372, 373

C375

C376, 377

C378

C382

180 pF

0.047 uF

220 pF

120 pF

D400

D499

Diode

0 Ohm

22 uH

Transistor

121 Ohm

4.7 Ohm

Diode

0.047 uF

6800 pF

F400, 406

L300, 301

Q312, 319

R300

R301, 302

R313

0.047 uF

100 uF

1 uF

0.022 uF

50 uF

22 uF

12K

511 Ohm

10 Ohm

33K

10 Ohm

C383

C403

10 pF

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6 - Diagrams

Table 6-1. Model-dependent Components (continued)

Designator

66332A/

6632B

316 Ohm

1.5K

80.6K

5.62K

20K

4.7 Ohm

5.11K

0 Ohm

316 Ohm

10K

200 Ohm

215 Ohm

80.6K

316 Ohm

26.1K

3.16K

6633B

6634B

Designator

66332A/

6632B

10K

6633B

6634B

R319

R320

R321

R323

R324

R325

R326

R328

R329

R330

R333

R334

R337

R339

R340

R341, 343

R342

R348

R349

R350

R351

R352

R354

R356

R357

511 Ohm

2.61k

215k

750 Ohm

340k

R413

R415

R418

R421

R422

R423, 429

R425

R427

R428

R430

R432

R433

R434

R436, 437

R439

R440

R442, 443

R445

R446

22K

22.22K

80K

7.5 Ohm

22.22K

160K

51.1K

3.3 Ohm

133K

10K

402K

10K

5.11K

14.7K

26.1K

10 Ohm

30.1K

14.7K

8.25K

14.7K

5.11K

26.1K

10 Ohm

51.1K

14.7K

8.25K

10K

15K

0 Ohm

52.3K

2.15K

5.11K

139 Ohm

0 Ohms

500 Ohm

3.3 Ohm

40K

0.51 Ohm

2.5K

499 Ohm

0 Ohm

1 Ohm

316 Ohm

51.1k

432 Ohm

287K

632 Ohm

80.6K

3.92K

750 Ohm

215K

7.5 Ohm

100K

0.33

7.5 Ohm

300K

1.5

464K

1.5K

130K

3.16K

5.2K

16.1K

R447

R449

R450

R452

R453

R455

6.2K

0 Ohm

16.2K

200K

51.1K

249K

22.22K

80.6K

200K

22.22K

2.15K

5.11K

16.1K

10K

2.5K

25K

5.2K

R359

R362

0 Ohm

39K

R457, 459

R462

0 Ohm

511 Ohm

40K

511 Ohm

4.7 Ohm

51.1 Ohm

12.1 Ohm

R364

R371

R372

R373

R376

R377

R378

R384, 389

R385

R386, 387

R392

R393

R394

R397

R404

25K

35.65K

2.5K

100 Ohm

35.65K

39K

470 Ohm

3.3 Ohm

2.5K

22.22K

25K

3.2K

22.22K

25K

3.2K

R463

R466

R467, 468

R469

R470

R473

R488

R489

R490

R496, 497

R505

R513, 515

R520

T300

U314

1 Ohm

0 Ohm

7.5 Ohm

0.25 Ohm

280K

1.25M

3.16M

25K

40K

7.5 Ohm

3.2K

7.5 Ohm

10K

200K

25K

40K

7.5 Ohm

0.5 Ohm

3.16M

6.8M

0.05 Ohm

487K

3.2K

7.5 Ohm

4.45K

164K

3.3 Ohm

10K

13.3K

1.25M

0 Ohm

3.32K

100K

0 Ohm

Xfmr

10K

R407, 410

R408, 409

R411

3.3 Ohm

0 Ohm

215K

7.5 Ohm

0 Ohm

215K

VR302

VR303

VR304, 305 2.4V

VR335 6.2V

4.99V

10V

3.6V

9.1V

7.5 Ohm

383K

6.2V

10V

3.6V

9.1V

R412

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Diagrams - 6

Table 6-2. A1 Board Component Locations

Ref.

C300

C301

C302

C304

C307

C308

C309

C311

C312

C314

C315

C316

C317

C318

C319

C320

C321

C322

C323

C324

C326

C327

C328

C329

C330

C331

C332

C333

C334

C335

C336

C337

C338

C339

C340

C341

C342

C343

C344

C345

C346

C347

C348

C349

C350

C351

C352

C353

C354

C355

C356

C357

C358

C359

C360

C361

C362

C363

C364

C365

C366

C367

C368

C369

C370

Ref.

C371

C372

C373

C374

C375

C376

C377

C378

C379

C380

C381

C382

C383

C384

C386

C403

C405

C411

C420

C421

C422

C423

C424

C425

C426

C427

C428

C429

C430

C431

C432

C480

C481

C482

C496

C497

C498

C499

C500

C501

C502

Ref.

D323

D324

D325

D326

D327

D328

D329

D330

D331

D332

D333

D334

D336

D337

D400

D470

D471

D499

F300

F301

F302

F303

F304

F400

F401

F402

F403

F404

F405

F406

F407

F500

J303

Ref.

R301

R302

R303

R304

R305

R306

R307

R308

R309

R310

R311

R312

R313

R314

R315

R316

R317

R318

R319

R320

R321

R322

R323

R324

R325

R326

R327

R328

R329

R330

R331

R332

R333

R334

R335

R336

R337

R338

R339

R340

R341

R342

R343

R344

R345

R346

R347

R348

R349

R350

R351

R352

R353

R354

R355

R356

R357

R358

R359

R360

R361

R362

R363

R364

R365

1.0

Ref.

R366

R367

R368

R370

R371

R372

R373

R374

R375

R376

R377

R378

R379

R380

R381

R382

R383

R384

R385

R386

R387

R388

R389

R390

R391

R392

R393

R394

R395

R396

R397

R398

R399

R400

R401

R402

R403

R404

R405

R406

R407

R408

R409

R410

R411

R412

R413

R414

R415

R416

R417

R418

R419

R420

R421

R422

R423

R425

R427

R428

R429

R430

R431

R432

R433

1.3

3.925

8.125 3.25

2.075 0.525

7.5

6.025 0.45

5.45

4.05

8.025 2.8

4.775 0.975

4.875 1.425

3.5

3.825 4.7

3.625 3.175

1.15

0.95

3.525 1.475

4.8 2.25

3.975 1.925

5.4

2.45

0.175 2.05

1.15 2.0

0.475 2.7

0.35

1.25

2.3

1.925 2.7

1.7 3.3

1.125 4.625

1.15

1.05

0.1

5.05

1.875 7.9

1.875 7.8

0.3

3.575 8.4

7.65

1.025 4.9

5.45

6.275 0.1

7.925 2.8

5.85

4.85

5.3

0.7

1.15

1.6

1.7

3.45

1.4

4.025 4.25

0.6

3.05

4.825 7.025

2.85

2.95

2.25

2.15

1.7

0.1

0.15

4.375

7.125

0.675 4.225

1.125 5.0

3.65

2.075 5.8

2.375 6.25

3.175 9.275

1.925

8.325

0.775 8.525

2.1

5.875

0.45

3.45

1.0

8.025

7.825

2.075

1.975

2.7

2.8

3.0

3.5

2.3

1.75

1.2

9.875

0.525 9.85

1.775 10.42

0.525 10.17

4.675 6.975

0.925 10.4

3.0

3.8

0.3

2.45

0.425 8.425

4.2

5.15

8.7

0.8

0.1

5.325

0.675 4.125

1.975 5.8

0.55

8.025 8.55

0.1

1.75

0.55

1.75

1.125 5.425

6.8 5.45

2.275 6.25

7.05

5.7

1.75

5.95

1.875 7.6

1.875 7.3

0.5

2.225 2.0

2.05 2.0

2.425 7.4

2.325 7.7

8.275 8.55

4.95

0.875 8.225

1.45

1.4

4.925

4.575 0.8

5.775 0.8

4.475

10.45

10.25

9.35

6.25

4.65

0.8

6.4

2.5

1.35

4.125

6.25

5.625

5.875

4.825 6.25

3.375 7.7

3.1

2.0

6.875

1.775 8.475

0.525 9.975

2.825 8.3

3.3

3.65

6.525

6.175

6.825

2.0

3.5

3.4

2.9

3.6

2.2

4.85

3.225

5.3

2.2

2.0

1.5

3.475 4.825

1.875 0.075

1.975 0.075

4.725 0.425

4.825 0.425

0.275 2.05

3.3

2.175 2.25

1.7 3.2

1.775 2.75

0.525 6.7

4.825

5.45

5.1

4.225

5.1

1.6

2.425

2.9

2.425

7.95

8.05

5.6

7.375

5.425

7.1

4.75

3.35

4.65

0.6

4.6

2.1

10.57

10.47

0.525

2.1

6.25

5.375 0.425

8.225 3.35

1.75

4.6

3.75

3.2

5.55

7.75

7.95

5.725

5.65

4.8

3.0

8.85

6.275

8.85

5.925

3.475 5.025

2.25

4.15

1.6

2.25

3.2

3.175

3.1

3.0

3.3

7.225

7.65

5.525

7.35

7.45

2.35

4.025

5.875

4.025

6.4

10.47

10.45

6.2

4.871 3.147

8.875

0.7

1.15

1.5

6.3

0.15

5.8

2.75

0.2

3.75

1.85

1.825

3.7

J304

J305

J307

J309

J314

J320

J414

J508

4.125 4.25

0.6

1.6

3.925 4.25

1.7

2.7

2.675 2.1

2.7

1.7

1.75

0.6

2.25

0.675 5.2

2.05

2.4

1.15

1.65

1.675 2.6

8.425

8.225

7.925

8.3

2.5

3.05

1.8

1.575 0.15

0.147 5.878

2.075 10.63

1.375 10.17

2.9

3.2

2.7

1.05

1.75

3.75

0.95

3.65

0.6

1.95

2.175 5.8

0.1

2.4

1.95

1.875 6.25

2.375 6.35

0.55

0.3

1.925 7.05

2.25 6.775

0.775 8.125

1.35

0.65

0.775 8.025

1.975 7.5

1.875 6.9

0.7

2.275 8.0

0.175 9.0

2.6

2.7

2.875 7.95

2.8

2.525

3.825

5.725

6.35

5.1

2.725

3.1

2.25

4.7

6.35

3.625

3.5

9.55

2.225

3.45

4.85

5.2

0.425 8.325

4.75

1.45

5.95

5.7

7.05

6.8

7.75

1.45

2.25

1.45

0.175 8.325

4.275 6.75

1.45

1.275 9.125

0.425 8.725

1.45

5.95

0.425 8.625

0.1 8.425

1.875 4.4

8.625

6.9

7.325

10.17

9.025

3.925

8.925

6.075

3.325

5.15

3.1

3.0

3.1

4.125

3.2

Cr342 3.9

8.9

L300

L301

P300

Q300

Q301

Q302

Q303

Q304

Q305

Q306

Q307

Q308

Q309

Q310

Q311

Q312

Q313

Q314

Q315

Q316

Q317

Q318

Q319

R300

D300

D301

D302

D303

D304

D305

D306

D307

D308

D309

D310

D311

D312

D313

D314

D315

D316

D317

D318

D319

D320

D321

D322

1.875 1.025

1.975 1.025

0.125

3.85

2.725

1.5

3.55

2.55

2.75

2.6

5.425

5.65

1.65

1.75

4.7

0.325

1.95

0.6

3.4

0.2

3.575

4.375

1.55

3.35

3.6

2.1

9.7

7.0

8.3

0.325 0.6

2.675 1.4

4.575

4.25

6.25

4.575 1.0

5.15 1.0

1.0

1.4

2.275

5.8

8.525

4.925

7.768

4.972

7.768

4.972

7.768

3.9

5.007

5.433

6.109

6.535

7.211

7.4

0.1

4.775

7.1

3.6

7.55

4.675

5.775 1.0

4.275 2.55

0.225 1.5

1.5

2.6

7.975 4.3

1.15

2.25

0.7

8.325

7.2

8.125

9.95

0.35

1.1

0.55

0.675 4.325

3.625 4.25

1.125 4.425

3.35

4.972

0.65

7.768

4.8

4.972

8.225

7.025

8.248

7.85

8.313

7.625

10.05

0.725

2.7

3.725

8.9

3.725 4.25

8.025 9.425

0.2

1.975 4.4

4.95

1.65

4.25

3.625 4.5

4.125 4.5

1.25

3.725

9.45

1.125 4.525

1.275 4.425

1.125 5.1

0.2

1.35

0.075 9.55

8.425

7.65

7.1

9.15

1.75

1.65

2.5

4.325

1.75

3.825

1.925 8.75

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6 - Diagrams

Table 6-2 continued

Ref.

R434

R435

R436

R437

R438

R439

R440

R441

R442

R443

R444

R445

R446

R447

R448

R449

R450

R451

R452

R453

R454

R455

R456

R457

R458

R459

R460

R461

R462

R463

R464

R465

R466

R467

R468

R469

R470

R471

R472

R473

R474

R476

R477

R478

R479

R480

R481

R482

R483

R484

R485

R486

R487

R488

R489

R490

R493

R494

R495

R496

R497

R498

R499

Ref.

R500

R505

R510

R511

R512

R513

R514

R515

R516

R517

R520

R521

R522

Rt301

S300

T300

Tp318

Tp319

Tp320

Tp321

Tp323

U300

U301

U302

U303

U304

U305

U306

U308

U309

U310

U311

U313

U314

U315

U400

U498

U499

Vr300

Vr301

Vr302

Vr303

Vr304

Vr305

Vr335

W300

W301

2.5

2.4

9.825

7.75

2.175 4.325

0.525 6.8

6.2

6.55

6.2

7.05

6.8

4.675 6.875

1.925 8.65

5.1

7.2

5.45

7.75

6.9

7.75

5.7

7.2

5.05

0.35

0.2

4.375 7.9

3.425 9.275

7.125

9.65

9.55

6.2

9.9

6.55

4.15

2.5

4.25

7.4

7.325

9.75

6.05

1.75

10.43

0.9

2.4

9.65

8.45

9.675

9.775

1.95

1.925 8.85

0.825 9.25

1.95

2.375 8.55

1.35 9.75

0.075 9.75

1.225 10.02

1.125 10.02

4.291 10.63

4.35

4.825

4.975

4.825

3.825

3.85

1.275 1.625

3.85 2.15

6.275 2.3

9.925

6.05

7.63

9.475

5.15

8.825

1.725

9.25

2.2

2.1

0.6

9.825

2.55

2.775 1.725

1.05

0.575 7.05

4.6 5.675

2.375 5.55

0.475 4.9

2.25

2.15

2.175 8.025

0.575 8.875

0.825 5.6

3.925 3.45

3.925 3.15

4.7

4.0

2.4

4.675 7.375

4.675 7.275

8.275 9.425

4.225 7.075

4.675 7.175

3.6

5.7

5.95

6.8

7.05

4.925 10.82

4.725 6.6

2.7

7.85

0.525 6.6

3.75

3.2

3.75

4.2

6.675

3.825

9.8

9.9

9.75

1.85

2.05

5.4

9.125

5.025

8.825

4.025

8.725

4.025

1.45

0.45

1.45

1.175

3.625 9.45

4.65 7.475

5.7

5.775

5.675

6.1

6.0

5.8

4.2

5.9

4.025 3.6

3.925 3.675

3.725 4.125

3.825 3.675

0.525 6.9

0.525 6.8

1.35

1.2

3.1

6.775

6.675

8.85

3.2

8.85

3.65

5.975

4.275 6.5

3.75

3.2

6.55

6.775

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Figure 6-1. A1 Board Component Locations

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Figure 6-2. A4 and A6 Board Component Locations

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Figure 6-3. A1 Board schematic (sheet 1)

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Figure 6-3. A1 Board schematic (sheet 2)

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Figure 6-3. A1 Board schematic (sheet 3)

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Figure 6-4. A6 Relay Option Board schematic

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Index

CV_Detect*, 48, 52

CV_Prog, 50, 52

—+—

—A—

+OUT, 47

+sense, 47

—D—

DAC, 48

disable protection, 40

disassembly - tools, 43

disassembly procedure, 43

downprogramming, 50, 52

DP_Control, 50

A1 board removal, 45

A1 Main board, 50

A2 board removal, 44

A2 Interface Board, 48

A2S201, 50

A3 board removal, 45

A3 Front Panel, 48

ADC, 48

—E—

EEPROM, 50

electronic load, 13

electrostatic discharge, 10

error codes, 37

—B—

—C—

bias voltages, 38, 39

—F—

F309, 50

fan speed, 40

Fan_Prog, 50, 52

firmware revisions, 10, 42

FLT, 47

front panel removal, 44, 45

Fuse, 50

cal denied, 41

calibration, 41

calibration - post repair, 41

CC, 38

CC line regulation, 17

CC load effect, 18

CC load regulation, 17

CC loop, 52

—G—

CC noise, 19

GPIB, 47

CC- operation, 17

CC source effect, 18

CC_Detect*, 48, 52

CC_Prog, 50, 52

clear password, 41

component locations

A1, 71, 72, 73, 74

A4, 76

—H—

—I—

hazardous voltages, 9

history, 5

HS_Therm, 50

constant current tests, 16

constant voltage tests, 14

Control, 50, 52

identification, 5

IDN? query, 42

Imon_H, 50

IMon_H, 52

Imon_L, 50

Imon_P, 50

INH, 47

inhibit calibration, 41

initialization, 42

interface signals, 47

copyrights, 5

cover removal, 44

current monitoring resistor, 13

current sink, 17

CV, 38

CV load effect, 14

CV loop, 52

CV Noise, 15

CV source effect, 15

CV/CC control, 50, 52

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Index

RS-232, 47

—J—

—L—

—M—

—N—

—O—

J307 voltages, 39

line voltage wiring, 46

manual revisions, 10

notice, 5

—S—

safety considerations, 9

safety summary, 3

schematic

A1, 77, 78, 79

A4, 76

schematic notes, 71

SCR, 52

secondary interface, 48

self-test, 37

-sense, 47

sense switch, 52

serial number, 5

series regulator, 50

shunt clamp, 52

status annunciators, 38

-OUT, 47

out of range, 41

OV_Detect*, 48, 52

OV_Prog, 50

—T—

Temp_Amb, 50

test equipment, 11

OV_SCR*, 48, 52

test setup, 12

trademarks, 5

transformer removal, 45

—P—

PARD, 15, 19

password, 41

performance test form, 19

performance tests, 13

PM_Inhibit, 52

power-on self-test, 37

primary interface, 48

printing, 5

transient recovery, 16

troubleshooting - bias and reference supplies, 38, 39

troubleshooting - equipment, 24

troubleshooting - flowcharts, 24

troubleshooting - introduction, 23

troubleshooting - overall, 24

troubleshooting - status annunciators, 38

programming, 13

protection, 40

—U—

UNR, 38

—R—

readback accuracy, 14

reference voltages, 38, 39

replaceable parts - binding posts, 57

replaceable parts - chassis, 55

revisions, 10

—V—

verification tests, 13

VMon, 50, 52

voltage programming, 14

RmHi, 52

RmLo, 52

ROM upgrade, 42

RPG, 48

—W—

warranty, 2

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