Epson Printer EPL 5500W User Manual

EPSON TERMINAL PRINTER

EPL-5500W

SERVICE MANUAL

EPSON

4005668

NOTICE

EPSON’s express written permission is forbidden.

The contents of this manual are subjects to change without notice.

All efforts have been made to ensure the accuracy of the contents of this manual. However, should any

errors be detected, SEIKO EPSON would greatly appreciate being informed of them.

The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or

the consequence thereof.

Epson is a registered trademark of Seiko Epson Corporation.

General Notice: Other product names used herein are for identication purposes only and may be trademarks

of their respective campanies.

- i -

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1) personal injury and 2) damage to

equipment.

DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great

caution should be exercised in performing procedures preceded by DANGER Headings.

WARNING Signals a precaution which, if ignored, could result in damage to equipment.

The precautionary measures itemized below should always be observed when performing repair/ mainte-

nance procedures.

DANGER

1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERI-

PHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE.

2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH

BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN

THEIR LINE OF WORK.

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CON-

NECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE

POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING

ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

WARNING

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTI-

FIED REPAIR TECHNICIAN.

2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE,

LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A

PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CON-

NECT IT TO THE POWER SOURCE.

3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE

POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS

AND/OR INDIVIDUAL CHIPS.

4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC

DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING

INTERNAL COMPONENTS.

5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY

THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER NONAP-

PROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE

EPSON WARRANTY.

- ii -

SAFETY INFORMATION

This printer is a page printer which operates by means of a laser. There is no possibility of danger from the laser,

provided the printer is operated according to the instructions in this manual provided.

Since radiation emitted by the laser is completely confined within protective housings, the laser beam cannot escape

from the machine during any phase of user operation.

For United States Users;

[Laser Safety]

This printer is certified as a Class 1 Laser product under the U.S. Department of Health and

Human Services (DHHS) Radiation Performance Standard according to the Radiation Control

for Health and Safety Act of 1968. This means that the printer does not produce hazardous laser

radiation.

[CDRH Regulations]

The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Adminis-

tration implemented regulations for laser products on August 2, 1976. Compliance is mandatory

for products marketed in the United States. The label shown below indicates compliance with

the CDRH regulations and must be attached to laser products marketed in the United States.

WARNING : Use of controls, adjustments or performance of procedures other than

those specified in this manual may result in hazardous radiation exposure.

[Internal Laser Radiation]

-4

Maximum Radiation Power:

Wave Length:

5.0 × 10 (W)

790 ± 20 nm

This is a Class IIIb Laser Diode Assay that has an invisible laser beam. The print head unit is

NOT A FIELD SERVICE ITEM. Therefore, the print head unit should not be opened under any

circumstances.

For Other Countries Users;

WARNING: Use of controls, adjustments or performance of procedures other than

those specified in this manual may result in hazardous radiation exposure.

-4

This is a semiconductor laser. The maximum power of the laser diode is 5.0 × 10

W and the wavelength is 790 ± 20 nm.

For Denmark Users;

ADVARSEL

Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgå

udsættelse for stråling.

Klasse 1 laser produkt der opfylder IEC825 sikkerheds kravene.

For Finland, Sweden Users;

- iii -

VAROITUS

Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa altis-

taa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteiylle.

VARNING

Om apparaten används på annat sätt än i denna bruksanvisning specificerats, kan

användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laser klass

For Finland, Sweden Service People

VAROITUS

Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle laser-säteilylle. Älä

katso säteeseen.

VARNING

Osynlig laserstrålning när denna del är öppnad och spärren är urkopplad. Betrakta ej

strålen.

For Norway Users;

ADVARSEL

Dersom apparatet brukes på annen måte enn spesifisert i denne bruksanvisning, kan

brukeren utsettes for unsynlig laserstråling som overskrider grensen for laser klasse 1.

-4

Dette er en halvleder laser. Maksimal effeckt til laserdiode er 5.0 × 10 W og

bølgelengde er 790 ± 20 nm.

Laser Safety Labels

[Label on rear printer case]

A laser safety labels is attached on the outside of the printer shown below.

For United State

For Europe

- iv -

[Label inside printer]

The following laser safety label will be attached inside the printer as shown below.

For Denmark, Finland, Sweden, and Norway

- v -

PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of

EPL-5500W.

The instructions and procedures included herein are intended for the experience repair technician, and attention

should be given to the precautions on the preceding page. The chapters are organized as follows:

CHAPTER 1. GENERAL DESCRIPTION

Provides a general product overview, lists specifications, and illustrates the main components of the printer.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of printer operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

Includes a step-by-step guide for product disassembly and assembly.

CHAPTER 4. ADJUSTMENTS

Includes a step-by-step guide for adjustment.

CHAPTER 5. TROUBLESHOOTING

Provides Epson-approved techniques for adjustment.

CHAPTER 6. MAINTENANCE

Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.

APPENDIX

Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.

The contents of this manual are subject to change without notice.

- vi -

REVISION SHEET

Revision

Issue Date

Revision Page

1st issue

Rev. A

November 24, 1995

- vii -

TABLE OF CONTENTS

CHAPTER 1.

GENERAL DESCRIPTION

OPERATING PRINCIPLES

DISASSEMBLY AND ASSEMBLY

ADJUSTMENTS

CHAPTER 2.

CHAPTER 3.

CHAPTER 4.

CHAPTER 5.

CHAPTER 6.

APPENDIX

TROUBLESHOOTING

MAINTENANCE

- viii -

Chapter 1 General Description

Table of Contents

1.1 FEATURES

1-1

1-3

1.2 SPECIFICATIONS

1.2.1 Basic Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.2.2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1.2.3 Reliability Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1.2.4 Environmental Conditions for Operating (Include Imaging Cartridge) . . . . 1-5

1.2.5 Environmental Conditions for Storage and Transportation . . . . . . . . . . . . 1-5

1.2.6 Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

1.2.7 Specifications for Consumable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

1.2.8 Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

1.2.9 Software Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

1.3 INTERFACE SPECIFICATIONS

1-9

1.3.1 Parallel Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

1.4 OPERATING INSTRUCTIONS

1-9

1.4.1 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

1.4.2 Display of Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1.4.2.1 Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1.4.2.2 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1.4.3 Printing Resolution Host PC Capability Dependency. . . . . . . . . . . . . . . . 1-11

1.5 MAIN COMPONENTS

1-12

1.5.1 C180 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

1.5.2 PWB-E Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

1.5.3 PWB-F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

1.5.4 Optical Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.5.5 FUSING UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.5.6 Photoconductor Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

1.5.7 Developing Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

List of Figures

Figure 1-1. Exterior View of the EPL-5500W . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Figure 1-2. Printable Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Figure 1-3. Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Figure 1-4. Component Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Figure 1-5. C180 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Figure 1-6. PWB-E Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Figure 1-7. PWB-F Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Figure 1-8. Optical Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Figure 1-9. Fusing Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Figure 1-10. Photoconductor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Figure 1-11. Developing Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

List of Tables

Table 1-1. Options for the EPL-5500W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Table 1-2. Paper Feed Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Table 1-3. Paper Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Table 1-4. Usability of Special Papers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Table 1-5. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Table 1-6. Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Table 1-7. Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Table 1-8. Host PC Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Rev. A

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EPL-5500W Service Manual

General Description

1.1 FEATURES

The EPSON EPL-5500W laser printer has a 300/600 dots per inch (dpi) resolution and 6 pages per minute

(ppm) printing speed in a dedicated Microsoft Windows Printing System. It works under Microsoft

Windows 3.1x and Windows 95, achieving very high performance due to the recent advances in PC

technology. The main features are:

❏

No ozone

Printing speed — 6 ppm

Resolution — 600/300 dpi

Light weight — about 5 kg (11 lb)

Small footprint

Low running cost: separation of the development/toner cartridge and photoconductor unit

Ease of use with Microsoft Windows Printing System (WPS)

PCL4 software emulation mode

High throughput, especially with fine-pitch halftone image output

Freedom from the memory overflow

Freedom from document incompatibility, True WYSIWYG

Bidirectional parallel interface (ECP and Microsoft Peppy modes)

Achieves high throughput with a very high-speed parallel interface. Maximum transmission speed is

approximately 2 MB/sec. (under ECP mode) or 600 KB/ sec. (under Peppy mode).

Figure 1-1 shows an exterior view of the EPL-5500W.

Figure 1-1. Exterior View of the EPL-5500W

Rev. A

1-1

General Description

EPL-5500W Service Manual

Table 1-1 lists the optional units available for the EPL-5500W.

Table 1-1. Options for the EPL-5500W

Cat. No.

Description

Note

S050005 Developer cartridge

S051029 Photoconductor unit

Developer and toner cartridge

—

1-2

Rev. A

EPL-5500W Service Manual

General Description

1.2 SPECIFICATIONS

This section provides statistical data for the EPL-5500W.

1.2.1 Basic Specifications

Printing method:

Resolution:

Laser beam scanning and dry electrophotography

600/300 dpi

Printing speed:

6 ppm (letter/A4)

First printing time (A4/LT):

Warm-up time:

Less than 20 seconds (face-up output)

Less than 35 seconds

(at rated current and 23° C (73° F) temperature)

Paper supply:

See Table 1-2.

Table 1-2. Paper Feed Methods

Capacity Using

20 lb. (75 g/m )

Paper

Usage Thickness

(Ream Weight)

Paper Supply

Paper Sizes

B5, A4, LT,

EXEC, LGL

16 to 24 lb.

(60 to 90 g/m )

150

5 to 10

Envelopes made of

20 to 24 lb.

(75 to 90 g/m )

Standard built-in paper tray

Monarch,

DL, C5, Env #10,

11, 12, 14

paper

Any size feedable 16 to 42 lb.

(Note 2) (60 to 157 g/m )

Manual feed slot

Notes:

1. The weight in pounds (lb) is determined by the weight of 500 sheets cut to 17 × 22 inches;

1 g/m = 0.2659763 lb.

2. Paper size range:

width

length

3 to 8.5 inches (76 to 216 mm)

5 to 14.0 inches (127 to 356 mm)

Paper types:

See Table 1-3.

Table 1-3. Paper Types

Xerox 4024 DP paper

20 lb (75 g/m )

Standard paper

Normal paper

Regular photocopier paper

Bond paper

Recycled paper

16 to 24 lb (60 to 90 g/m )

Card stock (90 to 157 g/m )

Envelopes

Labels

Letterhead

Special papers

Transparency (OHP) sheets

Colored paper

Rev. A

1-3

General Description

EPL-5500W Service Manual

Usability of special papers:

See Table 1-4.

Table 1-4. Usability of Special Papers

Input

OHP

Envelopes

Labels

Card Stock Letterhead

Standard built-in

paper tray

Manual feed slot

R: Reliable feeding and good image quality.

P: Possible, but better avoided.

N: Not supported.

Paper feed alignment and direction:

Paper ejection:

Center alignment for all sizes

Face down

Output tray capacity:

100 sheets (face down)

See Figure 1-2.

Printable area (standard paper):

4.0 mm

Printable Area

4.0 mm

Figure 1-2. Printable Area

Note:

The actual printable area depends on the printer mode.

Noise:

Less than 35 dB(A), standby

Less than 47 dB(A), operating

Ozone density:

Toxicity:

Less than 0.01 ppm

No toxicity exists in organic photoconductor (OPC), toner, or

plastic materials

1-4

Rev. A

EPL-5500W Service Manual

General Description

1.2.2 Electrical Specifications

Table 1-5. Electrical Requirements and Ranges

Description

Rated voltage

100 V Version

200 V Version

100 ∼ 120 VAC

90 ∼ 132 VAC

220 ∼ 240 VAC

198 ∼ 264 VAC

Input voltage range

Rated frequency range

Input frequency range

Power consumption

50 ∼ 60 Hz

47 ∼ 63 Hz

Less than 500 W

Less than 600 W

Power consumption while

in standby mode

Less than 15 W

(without option)

1.2.3 Reliability Specifications

MPBF (Mean Prints Between Failures): Over 25,000 sheets

Note:

MPBF indicates the average number of pages printed before an occurrence of a problem requiring

replacement or service.

MTBF (Mean Time Between Failures): 3000 power on hours (POH)

Jam rate:

1 out of 2,000 sheets or less (excluding multiple-sheet feeding)

Feed failure:

Multiple paper feeds:

Paper curl height:

1 out of 2,000 sheets or less (excluding multiple-sheet feeding)

1 out of 500 sheets or less

30 mm (1.2 inches) or less

Leading edge bending (1 cm or more): 1 out of 1,000 sheets

MTTR (Mean Time To Repair):

Durability:

30 minutes or less

5 years or 1,800,000 sheets

1.2.4 Environmental Conditions for Operation (Including Imaging Cartridge)

Temperature:

Humidity:

10 to 35° C (50 to 95° F)

15 to 85% RH

Altitude:

2,500 m (8,200 feet) or lower

Levelness:

1°

Illuminance:

Surrounding space:

3,000 lux or less (Must not be exposed to direct sunlight.)

Printer should have at least 100 mm (4") of clearance on its sides

and rear.

1.2.5 Environmental Conditions for Storage and Transportation

Temperature:

Humidity:

Drop test:

0 to 35° C (32 to 95° F)

30 to 85% RH

Clear to JIS Z0200-1987 Level 1

Vibration:

Vibration frequency

Acceleration

5 to 100 Hz and 100 to 5 Hz

1 G

Acceleration direction 3 directions

Resistance to atmospheric pressure:

Storage life:

More than 61.3 KPa

18 months (following date of manufacture)

Rev. A

1-5

General Description

EPL-5500W Service Manual

1.2.6 Applicable Standards

Safety Standards

120 VAC model:

UL 1950, CSA 22.2 No. 950 Deviation 3

220/240 VAC model:

EN 60950 (IEC950), NEMKO (IEC950), SETI (IEC950),

SEMKO (IEC950), DEMKO (IEC950)

Safety Regulations (Laser Radiation)

120 VAC model:

FDA (NCDRH) Class 1

220/240 VAC model:

VDE 0837 (Laser Class 1) (IEC825), SETI (IEC825), SEMKO

(IEC825), DEMKO (IEC825)

EMI

120 VAC model:

220/240 VAC model:

FCC Part 15 Subpart B Class B, DOC Class B

Vfg 243 (VDE 0878 Part 3,30)

EN55022 Class B (CISPR Pub. 22 Class B)

CE marking, EMC

Others

Toner:

OPC:

Ozone:

No effect on human health (OSHA-TSCA, EINECS)

No effect on human health (OSHA)

Less than 0.01 mmp

other UL478 (5th edition)

Materials:

SWISS environmental law (must contain no CdS)

1.2.7 Specifications for Consumables

Life:

Developer and toner cartridge: 3,000 pages

Photoconductor unit: 20,000 pages

Note:

In continuous printing mode with A4/letter paper at a 5% image ratio (black/white ratio). The life

varies, depending on the printing mode (continuous or intermittent) and/or the image ratio.

Environmental Conditions for Storage and Transportation

Temperature:

Humidity:

0 to 35° C (32 to 95° F)

30 to 85% RH

Drop test:

Vibration:

Height 76 cm (30.4 inches)

Same as printer

Resistance to atmospheric pressure:

Storage term:

More than 74 Kpa

18 months (following date of manufacture)

1.2.8 Physical Specifications

Dimensions (Width × Depth × Height):

Printer:

Weight:

352 × 264 × 299 mm (13.9 × 10.4 × 11.8 inches)

Approx. 5 kg (11 lb), with consumables, excluding all options

1-6

Rev. A

EPL-5500W Service Manual

General Description

1.2.9 Software Specifications

Built-in modes:

Microsoft Windows Printing System

PCL4 (software emulation)

Rev. A

1-7

General Description

EPL-5500W Service Manual

1.3 INTERFACE SPECIFICATIONS

The EPL-5500W is equipped with the following external interfaces:

❏

Parallel interface

1.3.1 Parallel Interface

The parallel interface has the following two modes:

❏

ECP mode

Microsoft Peppy mode

Pin assignments:

Connector type:

Applicable plug:

Fully IEEE-1284 compliant

P90-25027-1 (Amphenol) receptacle

57-30360 (Amphenol or equivalent)

1-8

Rev. A

EPL-5500W Service Manual

General Description

1.4 OPERATING INSTRUCTIONS

This section describes printer functions, including control panel operation and messages.

1.4.1 Control Panel

The printer control panel gives you easy control over most common printer operations. The panel consists of

the indicator lights described below.

GREEN Light

RED Light

Figure 1-3. Control Panel

Indicator Lights

❏

GREEN light

ON:

Printer is ready or idle.

Blinking:

Printer is currently receiving data.

❏

RED light

ON:

Printer has detected errors.

Rev. A

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General Description

EPL-5500W Service Manual

1.4.2 Display of Messages

This printer indicates two types of messages with the status message window for the printer driver on the PC.

1.4.2.1 Status Messages

This section describes the status messages.

Table 1-6. Status Messages

Message

Status

Printer ready

Printing

Printer is ready.

Printer is printing.

Manual feed

Paused

Printer is loading paper from manual feed slot.

Printer is in pause mode.

Printing stopped

Please wait

Printer is stopping during printing of a job.

Printer is in the wait condition.

Printer is warming up.

Paused printer warming up

Printer warming up

Printer is warming up.

1.4.2.2 Error Messages

This section describes error messages, what they indicate, and what measures to take to eliminate the error.

Table 1-7. Error Messages

Message

Status

Measures

The user is unable to redirect

a port, or system software

cannot find a file to complete

a request.

Check the printer connection

port, and reinstall the driver.

Configuration error

Low memory

Memory in PC has run out.

Add the memory to the PC.

The printer is not connected

to the local port when you are

using PCL emulation.

PCL emulation does not

support a network.

No local printer

The printer does not return

status information.

Status not available

Check the printer connection.

The printer does not return

status information.

Check printer/ cable

Service error

Check the printer connection.

Service required.

Printer is damaged.

Open the cover and remove

the jammed paper. Then

close the cover.

Clear paper jam

A paper jam occurred.

1-10

Rev. A

EPL-5500W Service Manual

General Description

Measures

Table 1-7. Error Messages (Continued)

Message

Status

Printer is cover open or no

toner cartridge is installed.

Check the cover and toner

cartridge.

Check Toner & Cover

Paper in the tray to be fed into

Wrong paper loaded

Change paper

the printer is different from the Check the paper size.

specified paper size.

Paper settings are wrong.

Check the paper size settings.

1.4.3 Printing Resolution Host PC Capability Dependency

This printer driver calculates the host PC’s capability every time Windows starts up, and the driver drops the

printing resolution at the beginning of each job automatically if the value it detects will not allow complete

printing at the resolution the user has set. This printer can print pages at the resolution if the HOST PC fulfill

the following conditions.

Table 1-8. Host PC Conditions

Installed DRAM Quantity

CPU

Windows 3.1, WFW 3.11

Windows 95

< 8 MB

≥ 8 MB

< 8 MB

≥ 12 MB

80386SX

16/20/25/33 MHz

or compatibles

300 DPI

(Note 1)

300 DPI

(Note 1)

—

80386DX

16/20/25/33 MHz

or compatibles

300 DPI

(Note 1)

300 DPI

(Note 1)

300 DPI

(Note 1)

300 DPI

(Note 1)

80486SX/DX

16/20 MHz

or compatibles

300/600 DPI

(Note 2)

300/600 DPI

(Note 2)

300/600 DPI

(Note 2)

300/600 DPI

(Note 2)

80486SX/DX

25/33/50 MHz

80486DX2

50/66 MHz

80486DX4

75/100 MHz

Pentium

300/600 DPI

(Note 2)

300/600 DPI

(Note 2)

300/600 DPI

60/66/75/90/100

120/133 MHz

Note 1: Some pages may be not be printed completely, depending on complexity of those pages.

Note 2: Some pages may not be printed at 600 DPI depending on complexity of those pages.

Rev. A

1-11

General Description

EPL-5500W Service Manual

1.5 MAIN COMPONENTS

To simplify maintenance and repair, the main components of the EPL-5500W have been designed for easy

removal and replacement. The main components are:

❏

C180 MAIN Board

PWB-E Board

PWB-F Board

Optical Unit

Main board

Power supply circuit board

High-voltage supply circuit board

Printhead unit

Fusing Unit

Photoconductor unit

Developer cartridge

Housing

C180 MAIN Board

Fusing Unit

PWB-E Board

Optical Unit

PWB-F Board

Figure 1-4. Main Components

1-12

Rev. A

EPL-5500W Service Manual

General Description

1.5.1 C180 MAIN Board

The C180 MAIN board contains a parallel interface controller and engine controller board. The primary

functions of this board are receiving print data from the host and sending the print image to the engine

controller via the video interface.

❏ Memory chips

4M-bit DRAM (U4)

❏ Custom ICs

ASIC E05B23 (U6)

The engine controller consists of an M3807 x 8-bit CPU, including a MASK ROM. It controls laser scanning

(the polygon mirror drive motor), image synchronization, laser beam pulse width, and power.

4M DRAM

(U4)

E05B23

(U6)

M3807

(IC201)

Figure 1-5. C180 MAIN Board

Rev. A

1-13

General Description

EPL-5500W Service Manual

1.5.2 PWB-E Board

The PWB-E is the power supply board, which consists of a switching regulator circuit. It converts the AC

line voltage into +24 V and +5 VDC voltages. There are two types of power supply board, the 100/120 V

type and 220/240 V type. The difference between the two circuits is only in the input section.

Do not touch VR1 on PWB-E board. This volume is for factory setting only.

VR1

Figure 1-6. PWB-E Board

1.5.3 PWB-F Board

The PWB-F is the high-voltage supply circuit board. It converts the development bias, OPC drum charge

bias, and image transfer bias.

Do not touch VR3 on the PWB-F board. These volumes are for factory setting only.

VR3

Figure 1-7. PWB-F Board

1-14

Rev. A

EPL-5500W Service Manual

General Description

1.5.4 Optical Unit

The optical unit consists of the laser diode (semi-conductor laser), the mirror motor (scanner motor) which

drives the polygon mirror for laser scanning, and several mirrors and lenses. The laser beam generated by the

laser diode is conducted to the OPC drum surface by way of the polygon mirror, as well as several mirrors

and lenses, to create a latent electro-photographic image on the drum.

Figure 1-8. Optical Unit

1.5.5 Fusing Unit

The fusing unit fixes the toner to the paper using heat and pressure. This unit has a heater lamp, thermistor,

and thermal fuse. There are two types of fusing units, the 120 V type and the 220/240 V type. The only

difference between them is the heater lamp.

Figure 1-9. Fusing Unit

Rev. A

1-15

General Description

EPL-5500W Service Manual

1.5.6 Photoconductor Unit

Core mechanisms of the printing process, such as charging and imaging, are integrated into this unit.

Figure 1-10. Photoconductor Unit

1.5.7 Developing Cartridge

The developing mechanism for the printing process is integrated into this cartridge.

Figure 1-11. Developing Unit

1-16

Rev. A

Chapter 2 Operating Principles

Table of Contents

2.1 ENGINE OPERATION

2-1

2.1.1 Print Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.1.1.1 Paper Feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.1.1.2 Drum Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.1.1.3 Laser Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.1.1.4 Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.1.1.5 Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.1.1.6 Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.1.2 Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.1.2.1 Main Motor Functions and Control . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.1.2.2 Paper Take-Up Sensor and Paper Exit Sensor. . . . . . . . . . . . . . . 2-9

2.1.2.3 Fuser Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2.1.2.4 Scanner Mirror Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2.1.2.5 Laser Diode Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

2.1.2.6 Bias Voltages and Laser Drive Timing . . . . . . . . . . . . . . . . . . . . 2-13

2.1.2.7 Fan Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

2.1.2.8 Power Supply Circuit Function and Safety Protection. . . . . . . . . 2-15

2.2 PARALLEL INTERFACE CONTROLLER OPERATION

2-16

2.2.1 C180 MAIN Board Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

List of Figures

Figure 2-1. Main Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Figure 2-2. Print Process Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Figure 2-3. Paper Feeding from the Paper Feed Tray . . . . . . . . . . . . . . . . . . . . 2-3

Figure 2-4. Drum Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-5. Laser Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Figure 2-6. Development. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Figure 2-7. Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-8. Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-9. Engine Controller Connecting Diagram . . . . . . . . . . . . . . . . . . . . . . 2-7

Figure 2-10. Gear and Roller Positions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure 2-11. Main Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Figure 2-12. Paper Take-Up Sensor and Paper Exit Sensor On/Off Timing . . . 2-9

Figure 2-13. Fuser Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Figure 2-14. Temperature for Fuser Control Procedure . . . . . . . . . . . . . . . . . . 2-10

Figure 2-15. Scanner Motor Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Figure 2-16. Laser Diode Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-17. LDATA Generation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-18. Laser Emission Power Adjustment Timing . . . . . . . . . . . . . . . . . . 2-12

Figure 2-19. High-Voltage Supply Block Diagram. . . . . . . . . . . . . . . . . . . . . . . 2-13

Figure 2-20. Print Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-21. Print Sequence (Start) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-22. Print Sequence (End) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-23. Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-15

Figure 2-24. Parallel Interface Controller Section . . . . . . . . . . . . . . . . . . . . . . . 2-16

Figure 2-25. C180 MAIN Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . 2-16

List of Tables

Table 2-1. Functions of C180 MAIN Board Main Elements . . . . . . . . . . . . . . . 2-18

EPL-5500W Service Manual

Operating Principles

2.1 ENGINE OPERATION

This section describes the functions and operating principles of the EPL-5500W engine. Figure 2-1 shows the

locations and names of the main engine components.

Figure 2-1. Main Components

1. Fan Motor (M3)

11. Paper Feeding Tray

12. Paper Lift-up Plate

13. Paper Take-up Roller

14. Paper Transport Roller

15. Paper Take-up Sensor (PC1)

16. Pre-image Transfer Roller

17. Electrode Comb

2. Lower Fusing Roller

3. Paper Exit Sensor (PC3)

4. Upper Fusing Roller

5. Heater Lamp (H1)

6. Paper Exit Roller

7. Print Tray

8. Optical Unit

18. Drum Cartridge

9. Toner Cartridge

10. Manual Feed Guide

Rev. A

2-1

Operating Principles

EPL-5500W Service Manual

2.1.1 Print Process

This section describes the print process from paper feeding to paper exit. Figure 2-2 shows a diagram of the

print process.

Optical Unit

Print Exit

Fusing

Exposure

Drum Cartridge

Drum

Charge

Toner

Hopper

Image

Transfer

Develop-

ment

Toner Cartridge

Manual Feed

(1 sheet)

Multi Feeding

(150 sheets)

Paper Feeding

Tray

Figure 2-2. Print Process Diagram

2-2

Rev. A

EPL-5500W Service Manual

2.1.1.1 Paper Feeding

Operating Principles

Paper can be fed into the printer from the paper feed tray (150 sheets) or from the manual feed slot (1 sheet at

a time). Paper fed by the paper take-up roller is transported to the transport roller, pre-image transfer roller,

and then exit roller. After this, the paper is fed out onto the print tray. The starting position of an image is

decided by the paper take-up sensor (PC1). A photo sensor is used as the paper take-up sensor (PC1) and the

paper exit sensor (PC3).

Paper Feeding Tray (Standard Tray)

When the paper take-up solenoid is energized, the main motor (M1) drive is transmitted to the paper take-up

roller via the paper take-up clutch (a one-way clutch) to rotate the paper take-up roller one revolution. At the

same time, the depression cam rotates and releases the paper lift-up plate to feed the top (first) paper. The

fixed separating pad is used for the paper separation system. It prevents the second or later sheets from being

fed together with the top paper.

Paper Exit Roller

Upper Fusing Roller

Lower

Fusing

Roller

Paper Exit Sensor

(PC3)

When SL1 is de-energized

Paper Take-Up

Roller

Depression

PC Drum

Cam

Pre-Image Transfer

Roller

Paper Lift-Up Plate

When SL1 is energized

Fixed Separating

Pad

Transport Roller

Paper Take-

Paper Take-Up Sensor (PC1)

Up Clutch

Paper Take-Up

Solenoid (SL1)

Paper Lift-Up Plate

Paper

Figure 2-3. Paper Feeding from the Paper Feed Tray

Rev. A

2-3

Operating Principles

EPL-5500W Service Manual

2.1.1.2 Drum Charge

The PC drum is charged with static electricity before laser exposure. The rotating charge brush and pre-film

are used as the charging method. Less ozone is generated by the corona charge of the rotating charge brush

and the pre-film, and the PC drum can be charged with low voltage because the charge is directly applied to

the PC drum. The charge brush is rotated by the drive of the M1 main motor via its gear.

C180 MAIN

Drum Charging

and Pre-film Bias

PWB-F

IC201

Drum Cartridge

Rotating Charge

Brush

PC Drum

Protecting

Shutter

PC Drum

Protecting

Shutter

Charged Surface:

(approx. -800 V)

PC Drum

Pre-film

A: Drum Charging Bias

B: Drum Ground

Figure 2-4. Drum Charge

2-4

Rev. A

EPL-5500W Service Manual

2.1.1.3 Laser Exposure

Operating Principles

The laser beam, emitted from the optical unit, makes an invisible static image. The SOS (start of scan)

sensor, installed on the laser diode control board (PWB-D), unifies the laser emission timing for each scan

line.

Charged Surface

C180 MAIN

Reflector Mirror

IC201

CN210

Laser-Exposed Surface:

(Approx. -50 V)

CN205

PWB-D

SOS Sensor

Laser Diode

Figure 2-5. Laser Exposure

2.1.1.4 Development

Toner is applied to the invisible static image on the PC drum and a toner image is created on the surface.

When the PC drum starts to rotate (when the main motor is activated), the PC drum surface remains 0 V at

the position between the rotating charge brush and sleeve roller. At this time, a specified positive voltage is

applied to the sleeve roller to prevent toner from being attracted back onto the PC drum (reverse bias

control).

Vs Terminal

VBL Terminal

VB Terminal

VB (Developing Bias)

C180 MAIN

IC201

VBL (Toner Blade Bias)

PWB-F

CN204

CN1F

Vs (Lower Seal Bias)

Figure 2-6. Development

1. Toner hopper:

Contains toner.

2. Toner agitating screw:Stirs the toner in the hopper and sends the toner to the toner transport

roller.

3. Toner transport roller: Transports the toner to the sleeve roller.

4. Doctor blade:

Spreads a thin, even coat of toner over the resin sleeve. The toner is

negatively charged by passing between this blade and resin sleeve.

Rotates the resin sleeve.

Carries the toner to the PC drum surface for development.

Collects the toner remaining on the resin sleeve.

5. Sleeve roller:

6. Resin sleeve:

7. Bias seal:

8. PC drum:

Is exposed to the laser to create an invisible image and rotates to carry

the developed image to the paper surface.

Rev. A

2-5

Operating Principles

EPL-5500W Service Manual

2.1.1.5 Image Transfer

The electrode comb is an image transfer system that transfers the toner image on the PC drum onto the paper.

Image Transfer Unit

Housing

Electrode Comb

Pre-Image Transfer Roller

C180 MAIN

Electrode Comb

IC201

PWB-F

PWB-S

CN204

Housing

CN1F

Pre-Image Transfer

Roller

Housing Ground

Image Transfer Bias

Figure 2-7. Image Transfer

2.1.1.6 Fusing

The toner image transferred onto the paper is fixed securely using a heat roller system as the fusing system.

The upper fusing roller, which is heated by the heater lamp, fuses the toner image, which is securely fixed by

the pressure between the upper and lower fusing rollers. Thermistor TH1 detects and controls the temperature

of the upper fusing roller. Thermal fuse TF1 blows when the temperature exceeds 200° C (392° F), shutting

down power to the heater lamp.

Thermal Fuse

Thermistor

Upper Fusing

Lower Fusing Roller

Roller

Heater Lamp

Paper

Figure 2-8. Fusing

2-6

Rev. A

EPL-5500W Service Manual

Operating Principles

2.1.2 Engine Control

This section describes engine control, the power supply board, and the high-voltage supply board. The

engine is controlled by the main board (C180 MAIN board). Figure 2-9 shows the engine controller

connection diagram.

C180 MAIN Board

Main

Motor

(M1)

PWB-D

Laser

Diode

Drive

Polygon

Motor

(M2)

Heater Lamp

PWB-E

Power

Unit

Fan

Motor

(M2)

Interlock Switch

Exit

Sensor

(PC3)

Paper

Take-up

Sensor

(PC1)

Paper

Take-up

Solenoid

(SL1)

Fusing

Roller

Thermistor

(TH1)

Image Transfer

Housing

PWB-F

High

PWB-S

Voltage

Unit

Image Transfer

Charger

Figure 2-9. Engine Controller Connection Diagram

Rev. A

2-7

Operating Principles

EPL-5500W Service Manual

2.1.2.1 Main Motor Functions and Control

The M1 main motor transmits the drive to the printer rollers and the optional second paper feed unit (lower

cassette) via each gear, as shown below.

Toner Cartridge

Sleeve Roller

Paper Exit Roller

Upper Fusing Roller

Lower Fusing

Roller

PC Drum

Pre-image Transfer

Roller

Main Motor (M1)

Optional Second Paper Feeding Unit

Paper Take-Up Roller

Paper Transport Roller

Figure 2-10. Gear and Roller Positions

2-8

Rev. A

EPL-5500W Service Manual

Operating Principles

Figure 2-11 shows the main motor drive circuit. The M1 main motor is a four-phase stepping motor,

controlled by the CPU (IC201) on the main board (C180 MAIN). This board has a stepping motor driver IC

that drives the M1 main motor with a constant current.

Board

C180 MAIN

M1 Main Motor

CN206

Figure 2-11. Main Motor Drive Circuit

2.1.2.2 Paper Take-Up Sensor and Paper Exit Sensor

The paper take-up sensor has three functions:

1. To detect the top edge of paper. The engine starts printing when the detection signal

is received.

2. To detect paper size. The printer detects the time it takes for paper to pass the paper

take-up sensor during paper feeding. If this time is long, longer paper is feeding;

if the time is short, shorter paper is feeding.

3. To detect paper jams and feed jams.

If the paper take-up sensor does not turn on for paper feeding, the printer detects a feed jam or no paper. A

feed jam is a paper jam that occurs in the feed process.

If any of the following conditions is detected, the printer detects a paper jam. A paper jam is a jam that

occurs in the printing process area.

The paper take-up sensor (PC1) or the paper exit sensor (PC3) is on at power on or when the upper case

is closed.

The paper take-up sensor (PC1) or the paper exit sensor (PC3) is not turned on or off within the

specified time. (Refer to the following timing chart.)

Take Up Solenoid ON

[seconds]

2.0

11.0

PC1

(CN203-3)

3.5-4.5

3.4-4.7

PC3

(CN208-3)

Figure 2-12. Paper Take-Up Sensor and Paper Exit Sensor

On/Off Timing

Rev. A

2-9

Operating Principles

EPL-5500W Service Manual

2.1.2.3 Fuser Control

The heater lamp, powered by AC voltage, heats the fuser. When the power supply board receives a FUSER

signal from the main board (C180 MAIN), the power supply board (PWB-E) supplies the AC voltage to the

heater lamp. This AC voltage is cut by an interlock switch when the case is open.

Thermistor TH1 detects the surface temperature of the upper fusing roller and inputs that analog voltage to

the 77-pin chip, IC201. Based on this temperature data, the heater lamp on/off signal (the FUSER signal) is

output from the 54-pin chip, IC201, causing heater lamp H1 to turn on or off to control the fusing

temperature. When the heater lamp is not turned off even if the thermistor detects a high temperature

malfunction (which occurs if the surface temperature of the upper fusing roller exceeds 200º C), the signal

from the 75-pin chip, IC201, changes from H to L to turn off the heater lamp forcibly.

C180 MAIN

Analog Voltage Detected by the

Thermistor (TH1)

IC201

CN202

TH1

5 VDC

Thermistor

IC202A

CN207

Heater Lamp

CN3E

PWB-E

IC202B

TF1

Thermal Fuse

CN1E

Heater Lamp

ON/OFF Signal

H1:ON

H1:OFF

Figure 2-13. Fuser Control Circuit

The following figure shows the fuser temperature control procedure.

When a print is made immediately after warm up

Temperature

(Degrees C)

172

156

112

Time

Power On

Warm up

Standby

Standby with Low

Temperature

Figure 2-14. Temperature for Fuser Control Procedure

1. Warm up: After printer initialization, printer warm up starts, and the heater lamp turns on until

the upper fusing roller’s temperature reaches approximately 172º C (342º F).

2. Standby:

In standby mode, the upper fusing roller’s temperature is controlled to maintain 156º C

(313º F). When this condition continues for 3 minutes, the printer goes into standby

mode at low temperature.

3. Print cycle: When the printer receives the printing command from the controller, the upper

fusing roller is controlled to maintain 172º C (342º F).

4. Standby at low temperature:

The upper fusing roller is controlled to maintain 112º C (234º F).

2-10

Rev. A

EPL-5500W Service Manual

Operating Principles

If any of the following conditions are detected, the printer indicates a fuser error:

1. If the thermistor detects the temperature has not risen by 20º C for 50 msec. within 12 to 30 sec.

after warm up. (This error applies only when the thermistor detects a temperature of 90º C (194º F)

or less.)

2. If the thermistor detects that the temperature has not reached 172º C (342º F) within 60 sec. after

warm up.

3. Except in pause mode (see the note below), if the thermistor detects that the temperature in the

idle state has fallen to 80º C (176º F) or lower for 50 msec., or the temperature during printing has

fallen to 133º C (271º F) or lower.

4. The thermistor detects that the temperature has exceeded 193º C (379º F) for 50 msec. during

temperature control.

Note:

In Pause Mode, the control temperature is decreased to save power in the idle state, the

heater lamp is turned OFF.

Thermo fuse TF1 cuts power if the temperature of the fusing section rises to an abnormally high level (over

200° C, 392° F).

2.1.2.4 Scanner Motor Control

Figure 2-16 is the scanner motor (M2) control circuit. The scanner motor is driven while it receives the

POLYGON CTL signal. Motor rotation speed is 8622 rpm.

C180 MAIN Board

M2 Scanner Motor

CN210

+24V

GND2

+5V

P_CTL

Figure 2-15. Scanner Motor Control Circuit

If the any of following conditions are detected, the printer indicates a scanner motor error:

1. The SSCAN signal has not been given once within 1 sec. after the scanner motor is energized.

2. The number of scanner motor rotations has not stabilized within ± 0.5 rpm by 4.2 sec. after the

motor is energized.

3. The number of scanner motor rotations has exceeded ± 3% for more than 0.5 sec. after the motor

is energized, even if the rotation number stabilizes within ± 0.5 rpm.

Rev. A

2-11

Operating Principles

EPL-5500W Service Manual

2.1.2.5 Laser Diode Drive

Figure 2-16 shows the laser diode drive circuit. Laser diode emission is controlled by three signals (LDATA,

LDAPC1, and LDAPC2) from the main board (C180 MAIN).

Laser Diode

SSCAN

LD_CTL

LDAPC1

LDAPC2

SOS

(PWB-D)

SOS Mirror

L DATA

SOS Sensor

C180 MAIN Board

Figure 2-16. Laser Diode Drive Circuit

The LDATA signal is the laser on/off signal. When it is LOW, the laser emits, and when it is HIGH, the

laser stops emitting. LDATA is the combination of the two signals in the figure below. If the VIDEO or the

FORCED LASER DIODE ON signal is activated (LOW), the LDATA signal will be active. The VIDEO

signal is an image signal sent from the video controller circuit. The FORCED LASER DIODE ON signal is

a laser emission signal to apply the laser beam to the SOS sensor.

Forced Laser Diode ON

L DATA

VIDEO

from the Video

Controller Circuit

(C180 MAIN)

Figure 2-17. LDATA Generation Circuit

The laser diode is forcibly activated after scanner motor M2 turns on. At this time, laser emission power is

adjusted. LDAPC1 and LDAPC2 are the laser emission power adjust signals; they are analog signals.

LDAPC1 is a tuning, and LDAPC2 is a fine tuning signal.

Scanner Motor On

LDATA

LDAPC1

LDAPC2

P_CTL

Figure 2-18. Laser Emission Power Adjustment Timing

If either of the following conditions is detected, the printer indicates a laser error:

The LDAPC1 signal or LDAPC2 signal has been out of the specified range while laser power is adjusted.

2-12

Rev. A

EPL-5500W Service Manual

Operating Principles

2.1.2.6 Bias Voltages and Laser Drive Timing

Figure 2-19 is a diagram of the drum charge bias voltage, image transfer bias voltage, and the developing

bias voltage control circuit. These bias voltages are generated from the +24 VDC from the high-voltage

supply board (PWB-F). If the printer detects a case-open condition, the interlock switch is set to off, which

cuts the +24 VDC, which, in turn, cuts the bias voltages.

These bias voltages are controlled by the main board (C180 MAIN). The HV-T signal is the image transfer

bias voltage control. While this signal is LOW, the image transfer electrode comb is charged to from +3 to

+6K VDC by the high-voltage supply circuit. HV SEL1 and HV SEL2 are image transfer bias level control

signals.

The HVB signal is the digital signal for developing bias voltage control. This signal controls the bias on/off.

The BIAS MON signal controls the bias voltage level (–300 V to –375K VDC) using pulse data. The image

density is controlled by the developing bias voltage level.

Power Supply

Board

Main

Board

High Voltage Supply

Board

(PWB-E)

(C180 MAIN)

(PWB-F)

Drum Charge

-2.0 K VDC

PWB-S

+24 VDC

Image Transfer

Bias

3K to 6 K VDC

+24 VDC

HV-C

Interlock

HV-T

HV SEL1

HV SEL2

HV B

Developing

Bias

-270 to -370 VDC

BIAS MON

Toner Doctor Blade

Bias -500 VDC

Seal Bias

-250 VDC

Figure 2-19. High-Voltage Supply Block Diagram

Rev. A

2-13

Operating Principles

EPL-5500W Service Manual

Figure 2-20 shows the print process.

Brush Roller Charging

Laser Exposure

PC Drum

Development

Image Transfer

Figure 2-20. Print Process

Figure 2-21 shows the start print sequence. The printer’s engine starts printing when it receives the PRINT

signal from the video controller circuit.

Normal M3 Rotation

[m sec.]

4000

Command

Polygon Motor

(M3)

1st: 790 to 1300

2nd: 2670 to 3080

Paper Take-up

Sensor (PC1)

Paper Take-up

Solenoid

500

(SL1/2)

Main Motor

(M1)

150

1st:770, 2nd:2820

Drum Charge

2310

Laser

Exposure

200

260

500

480

Development

300

Image

Transfer

1st: 1510

2nd: 1680

Figure 2-21. Print Sequence (Start)

Figure 2-22 is the end of the print sequence.

[m sec.]

Polygon Motor

(M3)

Paper Exit

Sensor (PC3)

5160

Main Motor

(M1)

850

Drum Charge

480

Laser

Exposure

Development

Image

Transfer

Figure 2-22. Print Sequence (End)

2-14

Rev. A

EPL-5500W Service Manual

2.1.2.7 Fan Motor Control

Operating Principles

The fan motor (M3) rotates at engine initialization, and stops after 2 sec. The fan motor also rotates during

printing. When printing ends, the fan motor stops after 3 min.

If the following condition is detected, the printer indicates a laser error:

The voltage equivalent to the motor current of the fan motor remains 160 mV or lower for 2 sec.

2.1.2.8 Power Supply Circuit Function and Safety Protection

The printer’s power supply board (PWB-E) supplies the +5 VDC and +24 VDC. The +24 VDC is used as

the bias voltage supply, main motor (M1) drive, scanner motor (M2) drive, fan motor (M3) drive, and

solenoid drive. For safety protection, the +24 VDC line is cut when the interlock switch (case open switch)

is off.

Interlock

+24 VDC

+5 VDC

Power Supply Board

AC IN

(PWB-E)

Figure 2-23. Power Supply Circuit Block Diagram

Rev. A

2-15

Operating Principles

EPL-5500W Service Manual

2.2 PARALLEL INTERFACE CONTROLLER OPERATION

The parallel interface controller section converts from a bidirectional parallel interface to a video interface.

The parallel interface controller section is in the C180 MAIN board.

C180 MAIN Board

Parallel Interface

Controller Section

Engine Controller Section

Figure 2-24. Parallel Interface Controller Section

2.2.1 C180 MAIN Board Operation

Figure 2-25 shows a block diagram of parallel interface controller section of the C180 MAIN board.

Engine Controller

Bidirectional

Section

E05B23

(U8)

Parallel I/F

4M DRAM

(U4)

Figure 2-25. C180 MAIN Board Block Diagram

2-16

Rev. A

EPL-5500W Service Manual

Operating Principles

Table 2-1 lists the functions of the main elements of the video controller section in the C180 MAIN board.

Table 2-1. Functions of C180 MAIN Board Main Elements

Element

Location

Function

This ASIC contains the following functions:

Changing from parallel I/F to video I/F.

E05B23 ASIC

DRAM

DRAM management (refresh control, RAS/CAS control).

These DRAMs are used as the working area of the E05B23.

Rev. A

2-17

Chapter 3 Disassembly and Assembly

Table of Contents

3.1 GENERAL INFORMATION

3-1

3.1.1 Precautions for Disassembly/Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.1.2 Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.1.3 Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.1.4 Service Checks after Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.2 DISASSEMBLY AND ASSEMBLY

3-4

3.2.1 Housing Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.2.1.1 Case Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.2.2 Removal of the Controller Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.2.2.1 Main Board (C180 MAIN Board) Removal . . . . . . . . . . . . . . . . . . 3-5

3.2.3 Disassembling the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.2.3.1 Optical Unit Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.2.3.2 Image Transfer Roller Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.2.3.3 Upper Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

3.2.3.4 High-Voltage Supply Board (PWB-F) Removal. . . . . . . . . . . . . . 3-10

3.2.3.5 Power Supply Unit (PWB-E) Removal. . . . . . . . . . . . . . . . . . . . . 3-11

3.2.3.6 Fusing Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

3.2.3.7 Fusing Unit Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

List of Figures

Figure 3-1. Removing the Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Figure 3-2. Removing the Shield Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 3-3. Removing the C169 MAIN-B Board . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 3-4. Removing the Optical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Figure 3-5. Removing the Image Transfer Unit -1. . . . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-6. Removing the Image Transfer Unit -2. . . . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-7. Moving the Image Transfer Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-8. Reinstalling the Electrode Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-9. Removing the Harness Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Figure 3-10. Removing the Upper Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Figure 3-11. Removing the PWB-F Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Figure 3-12. Removing the PWB-F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Figure 3-13. Removing the PWB-E Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Figure 3-14. Removing the PWB-E. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Figure 3-15. Gear and Spring Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Figure 3-16. Removing the Fusing Guide Plate . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Figure 3-17. Removing the Harness Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Figure 3-18. Removing the Fusing Entrance Guide . . . . . . . . . . . . . . . . . . . . . 3-13

Figure 3-19. Removing the Fusing Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Figure 3-20. Roller Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Figure 3-21. Removing the Heater Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Figure 3-22. Removing the Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Figure 3-23. Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Figure 3-24. Removing the Paper Separator . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Figure 3-25. Paper Exit Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Figure 3-26. Removing the G-Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Figure 3-27. Removing the Upper Fusing Roller . . . . . . . . . . . . . . . . . . . . . . . 3-18

Figure 3-28. Removing the Lower Fusing Roller . . . . . . . . . . . . . . . . . . . . . . . 3-19

Figure 3-29. Removing the Thermal Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

List of Tables

Table 3-1. Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Table 3-2. Abbreviations Used for Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Table 3-3. Screw Types and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Table 3-4. Checks after Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

EPL-5500W Service Manual

Disassembly and Assembly

3.1 GENERAL INFORMATION

This chapter describes disassembly/assembly procedures to use to replace the main assemblies of the

EPL-5500W.

3.1.1 Precautions for Disassembly/Assembly

Follow the precautions below when disassembling/assembling the printer.

❒Disconnect the power cord before disassembling/assembling the printer.

❒Be sure to handle the fusing unit carefully, because the unit remains hot for a while after

the printer stops printing.

❒If it is necessary to plug in the power cord and operate the printer after disassembling it,

please be careful of the following:

1.Keep your hands and clothing well away from operating or rotating parts (such as

rollers, fan motors, etc.).

2.Never touch electric terminals or high-voltage components (such as the charger and the

high-voltage unit).

❒Do not disassemble the photoconductor unit and toner cartridge.

❒If the photoconductor unit is removed from the printer, do not place it in direct sunlight.

❒Do not disassemble the optical unit.

❒Never turn power on if the optical unit is not installed.

❒To prevent damage to ICs from static electricity, do not touch the ICs on the circuit

board or the terminals of peripheral electrical components with your hands.

❒Use only the recommended tools to ensure safe and efficient maintenance work.

Inappropriate tools may damage the machine.

❒Never open the upper unit until the main motor stops completely. Otherwise, the gears

may be damaged.

❒When transporting the printer, remove the photoconductor unit and toner cartridge from

the printer.

❒When transporting the printer a long distance, pack up the printer using the original

packing material.

3.1.2 Tools

Use the tools listed in Table 3-1 for disassembling/assembling the printer and for troubleshooting.

Table 3-1. Tools

Name

Commercially Available?

Part No.

Philips screwdriver no. 2

Regular screwdriver

Tweezers

Yes

B743800200

B743000100

B641000100

B740200100

B740400100

Soldering iron

Round-nose pliers

Rev. A

3-1

Disassembly and Assembly

EPL-5500W Service Manual

3.1.3 Small Parts

In the following sections, abbreviations are used for small parts, such as screws and washers. Tables 3-2 and

3-3 list these abbreviations.

Table 3-2. Abbreviations Used for Screws

Abbreviation

Part Name

Cross-recessed Pan head

Cross-recessed Cup head

CP(O)

CP(S)(P1)

CCB

Cross-recessed Pan head with Outside-toothed lock washer

Cross-recessed Pan head with Spring lock washer and 1 Plain washer

Cross-recessed Cup head Bind

SCB

Slotted Cross-recessed B-tight

SCB(S)(P1)

Slotted Cross-recessed Bind with Spring washer and 1 Plain washer

Table 3-3. Screw Types and Abbreviations

Head

Washer

Body

(Assembled)

Top

Side

1.Cross-recessed

head

1.Bind

2.Pan

3.Cup

1.Normal

1.Plain washer 1

—————-

2.Slotted Cross-

recessed head

2. B-tight

2.Outside-toothed

lock washer

3.Spring washer

3-2

Rev. A

EPL-5500W Service Manual

Disassembly and Assembly

3.1.4 Service Checks after Repair

Check the repaired unit using the following list on completion of servicing.

Table 3-4. Checks after Repair

Item

Location

Checkpoint

Check

Control panel

Heater lamp

Test Page

Do all LEDs and buttons function normally?

Does the heater lamp turn on normally?

Is the test page printed normally?

Does data print in all modes?

Operation

Data print

Is the gap between the top edge of the paper and

the horizontal line in the adjustment printing sheet

print exactly 4.2 mm (0.17 inch).

Adjustments

Cleaning

Packing

Print position

Is toner and dust removed from the paper path?

Is the paper take-up roller cleaned?

Is the roller in the fusing unit cleaned?

Is the outer surface of the printer clean?

Are the consumables removed from the printer?

Is the unit packed securely?

Are accessories packed also?

Rev. A

3-3

Disassembly and Assembly

EPL-5500W Service Manual

3.2 DISASSEMBLY AND ASSEMBLY

This section describes and illustrates procedures for removing and disassembling components of the

EPL-5500W. Cleaning is described in Chapter 6. The assembly procedures are not described, except for

special notes where necessary, because assembly can be accomplished by performing disassembly in reverse.

3.2.1 Housing Removal

This section describes how to remove the cases and the rear frame.

3.2.1.1 Case Removal

1. Push the upper unit lock release button, and open the upper unit.

2. Remove each cover in the following order.

When reinstalling each cover, securely insert the protrusions for the cover into the cutouts in the

printer frame.

4. Rear Cover

3. Operation

Cover

Upper unit

Upper unit lock

release button

2. Front Cover

1. Left cover

Figure 3-1. Removing the Housing

3-4

Rev. A

EPL-5500W Service Manual

Disassembly and Assembly

3.2.2 Removal of the Controller Section

The control section is comprised of the controller board (the C180 MAIN board).

3.2.1.1 Main Board (C180 MAIN Board) Removal

1. Turn the printer so that its right side faces you.

2. Remove the right cover.

3. Remove 2 screws, and then remove the shield case.

Figure 3-2. Removing the Shield Case

4. Disconnect all connectors on the C180 MAIN board.

5. Remove the 5 screws for the C180 MAIN board.

6. Remove the C180 MAIN board.

Figure 3-3. Removing the C180 MAIN Board

Rev. A

3-5

Disassembly and Assembly

EPL-5500W Service Manual

3.2.3 Disassembling the Engine

This section describes disassembling the engine, including the high-voltage unit (PWB-F) and power supply

board (PWB-E).

3.2.3.1 Optical Unit Removal

❒Do not touch the optical unit, except during replacement.

❒Do not open the unit under any conditions.

❒Do not remove the circuit board from the optical unit under any conditions.

1. Open the top cover.

2. Remove the right cover, left cover, and front cover. (Refer to Section 3.2.1.1.)

3. Remove the cover shield plate.

4. Disconnect connectors CN205 and CN210 from the C180 MAIN board.

4. Remove the 6 screws from the optical unit.

5. Remove the optical unit.

Figure 3-4. Removing the Optical Unit

3-6

Rev. A

EPL-5500W Service Manual

Disassembly and Assembly

3.2.3.2 Image Transfer Unit Removal

1. Open the top cover.

2. Remove harness cover A. (Refer to Section 3.2.3.3.)

3. Remove the 2 screws and holders at both ends of the image transfer unit.

Figure 3-5. Removing the Image Transfer Unit - 1

4. Disconnect the 2 connectors and remove the unit.

Figure 3-6. Removing the Image Transfer Unit - 2

Rev. A

3-7

Disassembly and Assembly

EPL-5500W Service Manual

After reinstalling the image transfer unit, check that the unit smoothly moves up and down.

Figure 3-7. Moving the Image Transfer Unit

5. Remove the electrode comb.

When reinstalling the electrode comb, be careful of the direction of installation. Install the

electrode comb so that the comb terminal faces the image transfer roller drive gear.

Figure 3-8. Reinstalling the Electrode Comb

3-8

Rev. A

EPL-5500W Service Manual

Disassembly and Assembly

3.2.3.3 Upper Unit Removal

1. Open the upper unit.

2. Remove the right cover and left cover. (Refer to Section 3.2.1.1.)

3. Disconnect connectors CN202, CN208, and CN211 from the C180 MAIN.

4. Remove harness covers A and B, and pull CN1 out from the PWB-E board.

5. Remove the image transfer unit. (Refer to Section 3.2.3.2.)

Figure 3-9. Removing the Harness Cover

6. Slide and remove the unit as shown in the illustration.

Figure 3-10. Removing the Upper Unit

Rev. A

3-9

Disassembly and Assembly

EPL-5500W Service Manual

3.2.3.4 High-Voltage Supply Board (PWB-F) Removal

1. Open the top cover.

2. Remove 1 screw from the PWB-F cover.

3. Remove the PWB-F cover.

Figure 3-11. Removing the PWB-F Cover

4. Remove the 4 screws from the PWB-F board.

5. Disconnect 2 connectors.

6. Remove the PWB-F board.

Figure 3-12. Removing the PWB-F

3-10

Rev. A

EPL-5500W Service Manual

Disassembly and Assembly

3.2.3.5 Power Supply Unit (PWB-E) Removal

1. Remove the upper unit. (Refer to Section 3.2.3.3.)

2. Remove 6 screws, and remove the PWB-E cover.

Figure 3-13. Removing the PWB-E Cover

3. Disconnect connector CN207 from the C180 MAIN board.

4. Remove 4 screws and 2 screws, and then remove the PWB-E.

Figure 3-14. Removing the PWB-E

Rev. A

3-11

Disassembly and Assembly

EPL-5500W Service Manual

3.2.3.6 Fusing Unit Removal

1. Open the top cover. (Refer to Section 3.2.3.3.)

2. Remove the image transfer unit. (Refer to Section 3.2.3.2.)

3. Remove 1 screw, and remove the drive tension section of the fusing unit.

4. Remove the transport gear.

5. Release the hook for the spring and remove the drive gear section of the fusing unit.

When rehooking the spring, be sure to hook it in the correct position.

drive gear section

of the Fusing unit

drive transport

gear

hook of the

spring

drive tension section

of the Fusing unit

Figure 3-15. Gear and Spring Position

6. Remove 2 screws, and remove the fusing guide plate.

Figure 3-16. Removing the Fusing Guide Plate

3-12

Rev. A

EPL-5500W Service Manual

Disassembly and Assembly

7. Remove the harness cover.

Figure 3-17. Removing the Harness Cover

8. Remove the fusing entrance guide.

Figure 3-18. Removing the Fusing Entrance Guide

Rev. A

3-13

Disassembly and Assembly

EPL-5500W Service Manual

10. Remove 4 screws, and remove the fusing unit.

Figure 3-19. Removing the Fusing Unit

After reinstalling the fusing unit, check the direction of the bushings on the paper exit roller and

the connection between the roller and the ground plate.

Figure 3-20. Roller Position

3-14

Rev. A

EPL-5500W Service Manual

Disassembly and Assembly

3.2.3.7 Fusing Unit Disassembly

This section describes how to remove the paper exit sensor, heater lamp, lower fusing roller, and upper fusing

roller.

Heater Lamp

Do not touch the glass surface of the lamp with your bare hands.

1. Remove the fusing guide plate. (Refer to Section 3.2.3.8.)

2. Pull the heater lamp out of the lamp holder from the front side.

Figure 3-21. Removing the Heater Lamp

When reinstalling the lamp, position its voltage indicator to the left side (non-gear end.).

Rev. A

3-15

Disassembly and Assembly

EPL-5500W Service Manual

Thermistor

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Remove the 1 screw, and remove the thermistor.

Figure 3-22. Removing the Thermistor

When reinstalling the thermistor, wire the harness as shown below.

Figure 3-23. Wiring

3-16

Rev. A

EPL-5500W Service Manual

Disassembly and Assembly

Paper Separator

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Release the lock of the holder, and remove the 3 paper separators.

Figure 3-24. Removing the Paper Separators

When reinstalling the paper separators, be careful of their positions, because the middle one

differs from the others.

Paper Exit Sensor

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Remove the paper exit sensor.

Figure 3-25. Paper Exit Sensor

Rev. A

3-17

Disassembly and Assembly

EPL-5500W Service Manual

Fusing Roller

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Remove the 2 G-rings from the fusing unit.

Figure 3-26. Removing the G-Rings

When reinstalling the G-rings:

❒ Be careful of the direction.

❒ Securely position them into the grooves of the fusing roller.

3. Remove the upper fusing roller drive gear.

4. Remove the upper fusing roller.

Figure 3-27. Removing the Upper Fusing Roller

3-18

Rev. A

EPL-5500W Service Manual

Disassembly and Assembly

5. Take out the lower fusing roller.

Figure 3-28. Removing the Lower Fusing Roller

Thermal Fuse

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Remove 2 screws, and remove the thermal fuse.

Figure 3-29. Removing the Thermal Fuse

Rev. A

3-19

Chapter 4 Adjustment

Table of Contents

4.1 ADJUSTMENT

4-1

4.1.1 Print Position Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

List of Figures

Figure 4-1. Print Position Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-ii

Rev. A

EPL-5500W Service Manual

Adjustments

4.1 ADJUSTMENTS

This section describes the adjustment procedures for the EPL-5500W. You must perform these adjustments

after servicing the printer, especially when any component or part is replaced.

4.1.1 Print Position Adjustment

You can adjust the vertical print position on a sheet of paper by turning the image synchronizing volume

control on the main board (C180 MAIN). After replacing a main board, be sure to adjust the print position

using the procedure below.

1. Connect the EPL-5500W to LPT1 port of PC. And set the A4 size paper.

2. Install the EPL-5500W printer driver.

3. Set paper size to A4 setting by PCL Emulation Front Panel window.

4. Copy the adjustment printing data file lj4a4.bin to c:\ drive.

5. Open the DOS Prompt window.

7. Type the copy /b lj4a4.bin lpt1: , and then Enter. Printer print adjustment printing sheet.

8. Check that the registration gap between the leading edge of the sheet and the horizontal line printed on

the page is within the following range:

4.2 ± 2.5 mm (0.17 ± 0.1 inches)

for a adjustment printing sheet on A4 paper:

If the gap is not correct, adjust the print position as described in the next few steps.

4.2 mm

Leading Edge

Figure 4-1. Print Position Adjustment

9. Turn printer power off.

10. Open the right cover and shield plate. (See Chapter 3.)

11. Adjust the image synchronizing adjustment volume (VR1) on the main board (C180 MAIN) so that the

gap for the print position of the horizontal line (down from the top edge of the sheet) becomes 4.2 mm

(0.17 inches) .

Turn VR1 clockwise to increase the gap for the print position of the horizontal line.

Turn VR1 counterclockwise to decrease the gap.

12. Turn on the printer.

13. Print a adjustment printing sheet again (Step 7) to check the print position.

14. Repeat steps 8 to 13 until the print position is 4.2 mm (0.17 inches).

15. Reattach the shield plate and right case.

Rev. A

4-1

Chapter 5 Troubleshooting

Table of Contents

5.1 OVERVIEW

5-1

5-3

5.2 SELF-DIAGNOSTIC FUNCTION AND TOOL

5.3 TROUBLESHOOTING

5.3.1 Troubleshooting of Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3.2 Print Quality Anomaly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

List of Tables

Table 5-1. Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Table 5-2. Symptoms and Reference Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Table 5-3. The Printer Does Not Operate at All . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-4. Both LED Lights Do Not Come On. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-5. Clear Paper Jam (1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-6. Clear Paper Jam (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Table 5-7. Check Toner & Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Table 5-8. Service Error (1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Table 5-9. Service Error (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Table 5-10. Service Error (3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Table 5-11. Service Error (4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Table 5-12. Print Quality Anomalies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

EPL-5500W Service Manual

Troubleshooting

5.1 OVERVIEW

The EPL-5500W has a sophisticated, built-in, self-diagnostic function that reduces troubleshooting time by

identifying failed parts or components. This self-diagnostic test identifies the troubleshooting problems for

page printers, in which even a trivial failure can result in a serious print quality problem.

5.2 SELF-DIAGNOSTIC FUNCTION AND TOOL

This section describes the self-diagnostic function, in which the controller automatically checks the operating

conditions of each component. If any abnormality is detected, the printer driver displays a message in the

status window.

If an engine error is detected, the printer driver displays a “SERVICE CALL” message. This error message

does not display error information details. To isolate the problem more, you must read the engine error status

The procedure for using the program is as follows:

1. Connect the EPL-5500W to the PC’s LPT1 port, and power the printer on.

2. Start Windows 3.1.

3. If you are using the EPL-5500W printer driver, you must change it so that it does not direct output to a

printer. (If you are not using the EPL-5500W printer driver, skip to step 9.)

The tool program cannot run if EPL-5500W printer driver output is directed a printer port in

Windows 3.1, because the EPL-5500W printer driver and special tool both use an interface

protocol program. The interface protocol program for the special tool cannot be active in Windows

3.1 while the interface protocol for the EPL-5500W printer driver is active.

4. Open the Main window in Windows 3.1.

5. Open the Printers window.

6. Select EPL-5500W.

7. Click the Connect button to change the Ports: selection in the Connect menu from LPT1: or LPT2:

to FILE:.

8. Select another printer under the Installed Printers: list, and then click the Set As Default Printer

button.

9. Run the SLEEKDBG.EXE file for the special tool from the Program Manager. Windows 3.1 opens the

Cimarosa Debug Tool window.

10. Set the Port to LPT1 in the Cimarosa Debug Tool window.

11. Click the Read / Write Register button in the Cimarosa Debug Tool window. The Select

Protocol Cimarosa window is opened.

12. Set the protocol to Peppy.

13. Type 000D in the Address box and 04 in the Data write box. Then click the Write button.

14. Type 000E in the Address box. And then click the Read button. The Data read box displays the

error code.

The error codes are shown in Table 5-1 on the next page.

Rev. A

5-1

Troubleshooting

Error Code

EPL-5500W Service Manual

Table 5-1. Error Codes

Error Condition

0x02

0x10

0x13

0x20

0x23

0x31

0x40

0x43

0x51

0x52

0x61

0x62

0x70

0x73

Fan motor error

Scanner mirror motor error

Scanner mirror motor and fan motor error

Laser light error

Laser light and fan motor error

Laser light and scanner mirror motor error

Fusing unit error

Fusing unit and fan motor error

Fusing unit and scanner mirror motor error

Fusing unit, scanner mirror motor, and fan motor error

Fusing unit and laser light error

Fusing unit, laser light, and fan motor error

Fusing unit, laser light, and scanner mirror motor error

Fusing unit, laser light, scanner mirror motor, and fan motor error

5-2

Rev. A

EPL-5500W Service Manual

Troubleshooting

5.3 TROUBLESHOOTING

This section describes troubleshooting abnormal operations and print quality problems.

5.3.1 Troubleshooting of Abnormal Operations

This section describes how to detect malfunctions, and determine their cause, and it suggests what actions to

take for various types of malfunctions. Each paragraph refers you to a detailed troubleshooting table.

Table 5-2. Symptoms and Reference Tables

Reference

Symptom

Printer Condition

Table

The heater lamp in fusing unit does not come on,

and so neither LED light is on.

The printer does not operate at all.

5-3

“Status not available” or “Check

printer / cable” is displayed.

“Status not available” or “Check printer / cable”

is displayed by the printer driver interface.

5-4

“Clear paper jam” is displayed by the printer

driver interface during power on.

5-5

“Clear paper jam” is displayed.

“Clear paper jam” is displayed by the printer

driver interface during printing.

5-6

“Check Toner & Cover” is

displayed.

“Check Toner & Cover” is displayed by the

printer driver interface.

5-7

A fusing unit error is detected.

(Refer to Section 5.2)

5-8

A fan motor error is detected.

(Refer to Section 5.2)

5-9

“Service Call” is displayed.

A scanner motor error is detected.

(Refer to Section 5.2)

5-10

5-11

A laser light error is detected.

(Refer to Section 5.2)

Rev. A

5-3

Troubleshooting

Cause

EPL-5500W Service Manual

Table 5-3. The Printer Does Not Operate at All

Step

Checkpoint

Finding

Yes

Solution

Connector CN207 on the

C180 MAIN board may be

disconnected.

Is connector CN207 on the

C180 MAIN board

disconnected?

Connect CN207

on the board.

The fuse on the PWB-E

board may be blown.

Has the fuse blown on the

PWB-E board?

Yes

Replace the fuse.

With power on, is there an

output of +5 VDC between pin

4 (+) and pin 3 (–) for CN207

on C180 MAIN board?

Replace the

PWB-E board.

PWB-E board may be dead.

—

C180 MAIN board may be

dead.

Replace the C180

MAIN board.

—

Table 5-4. Both LED Lights Do Not Come On

Cause

Step

Checkpoint

Finding

Solution

The C180 MAIN board may

be dead.

If you replace the C180 MAIN

board, do the LEDs come on?

Replace the C180

MAIN board.

Yes

Table 5-5. Clear Paper Jam (1)

Cause

Step

Checkpoint

Finding

Solution

The paper take-up sensor

flag position may be

incorrect.

Reposition the

paper take-up

sensor flag.

Is the paper take-up sensor

flag position OK?

Reposition the

paper exit sensor

flag.

The paper exit sensor flag

position may be incorrect.

Is the paper exit sensor flag

position OK?

Yes

The paper take-up sensor

connector may be

disconnected.

Is the paper take-up sensor

connector disconnected?

Connect it.

The paper exit sensor

connector may be

disconnected.

Is the paper exit sensor

connector disconnected?

The paper exit sensor may

be bad.

—

Replace it.

The paper take-up sensor

may be bad.

5-4

Rev. A

EPL-5500W Service Manual

Troubleshooting

Solution

Table 5-6. Clear Paper Jam (2)

Cause

Step

Checkpoint

Finding

Disconnect CN203 on the

C180 MAIN board, and check

the coil resistance between

pins 5 and 6 on the

disconnected cable side of the

connector using a multimeter.

Is the resistance

Replace the paper

take-up solenoid.

approximately 80 ohms?

If the coil is shorted, check the

solenoid drive circuit using the

procedure below:

1. Set the multimeter to

voltage.

The paper take-up

solenoid coils may be

open or shorted.

2. Place the (–) terminal of

the multimeter on pin 5

of connector CN207 on

the C180 MAIN board.

3. Place the (+) terminal of

the multimeter on pin 6

(GND).

Replace the paper

take-up solenoid

and the C180 MAIN

board.

Yes

With power on, does the

multimeter detect any current?

Disconnect CN206 on the

C180 MAIN board, and check

the coil resistance between

pins 1 and 2 and between pins

3 and 4 (2 points total) on the

disconnected cable side of the

connector using a multimeter.

Pin 1 — Pin 2

Replace the main

motor.

Pin 3 — Pin 4

Are the resistances of all four

points approximately 10 ohms?

If any coil is shorted, check the

main motor drive circuit using

the following procedure:

1. Set the multimeter to

voltage.

The main motor coils

may be open or shorted.

2. Place the (–) terminal of

the multimeter on pins

1, 2, 3, or 6 of CN206

on the C180 MAIN

Replace the C180

MAIN board.

Yes

board.

3. Place the (+) terminal on

pin 2 of CN207 on the

C180 MAIN board

(GND).

With power on, does the

multimeter detect current?

Continued on next page

Rev. A

5-5

Troubleshooting

Cause

EPL-5500W Service Manual

Table 5-6. Clear Paper Jam (2) (Continued)

Step

Checkpoint

Finding

Yes

Solution

Paper take-up sensor flag

position may be incorrect.

Is the paper take-up sensor

flag position incorrect?

Reseat the paper

take-up sensor flag.

Paper take-up roller may

be bad.

Replace the paper

take-up roller.

—

Table 5-7. Check Toner & Cover

Cause

Step

Checkpoint

Finding

Solution

Replace the

The interlock switch lever

is bad.

Does the switch turn on when

the case is closed?

interlock lever.

The interlock switch may

be bad.

Does the switch toggle?

(Check with a multimeter.)

Replace the

interlock switch.

With power on, is there an

output of +24 VDC between

pin 1 (+) and pin 2 (–) for

CN207 on C180 MAIN board?

The PWB-E board may be

dead.

Replace the PWB-E

board.

Table 5-8. Service Error (1)

Cause

Step

Checkpoint

Finding

Solution

The connector for the

thermistor may be

disconnected.

Is the thermistor connector

disconnected?

Yes

Connect it.

Does the heater lamp

remain lit up until the error

occurs?

The C180 MAIN board

may be bad.

Replace the C180 MAIN

board.

The heater lamp or

thermal fuse in the fusing

unit may be bad.

Replace the heater lamp

or thermal fuse in the

fusing unit.

Does the heater lamp

come on at power on?

—

The PWB-E board may

be dead.

Replace the PWB-E

board.

—

5-6

Rev. A

EPL-5500W Service Manual

Cause

Troubleshooting

Solution

Table 5-9. Service Error (2)

Step

Checkpoint

Finding

Connector CN211 on the

C180 MAIN board may be

disconnected.

Is CN211 on the C180 MAIN

board disconnected?

Yes

—

Connect it.

Replace it.

The fan motor may be bad.

—

Table 5-10. Service Error (3)

Cause

Step

Checkpoint

Finding

Solution

Replace the

optical unit.

The optical unit may be bad.

—

The C180 MAIN board may

be bad.

Replace the C180

MAIN board.

Table 5-11. Service Error (4)

Cause

Step

Checkpoint

Finding

Solution

The optical unit may be

bad.

Replace the optical

unit.

—

The C180 MAIN board

may be dead.

Replace the C180

MAIN board.

Rev. A

5-7

Troubleshooting

EPL-5500W Service Manual

5.4.2 Print Quality Anomalies

This section describes how to isolate possible causes of a print quality problem.

Table 5-12. Print Quality Anomalies

Symptom

Possible Cause

Part Name

Check Item

Remedy

Poor

development

Replace the PWB-F

board.

Low image density

PWB-F board

—

Check to see if the

Image transfer surface of image

Replace the image

transfer unit.

unit

transfer unit is

damaged.

Image transfer

problem

Replace the PWB-F

board.

PWB-F board

—

Defective PC

drum

Photoconduc-

tor unit

Replace the

photoconductor unit.

Adjust the print

density using the

printer settings.

Improper print

density setting

—

Foggy background Poor develop-

ment

Toner

cartridge

Replace the toner

cartridge.

—

Replace the PWB-F

board.

Improper

charging

Drum charge

Check the wiring of

the PC drum charging

bias line.

Replace the

photoconductor unit.

Adjust the print

density using the

printer settings.

Improper print

density setting

—

5-8

Rev. A

EPL-5500W Service Manual

Troubleshooting

Remedy

Table 5-12. Print Quality Anomalies (Continued)

Symptom

Blank print

Possible Cause

Part Name

Check Item

Check whether the

toner cartridge is

installed properly.

Imaging

cartridge

Reinstall the toner

cartridge.

Poor

development

Replace the PWB-F

board.

PWB-F board

—

Improper

charging

Replace the PWB-F

board.

Check the surface of

the image transfer

unit.

Image transfer

unit

Replace the image

transfer unit.

Poor image

transfer

Replace the PWB-F

board.

PWB-F board

—

Adjust the print

density using the

printer settings.

Improper print

density setting

—

Defective optical

unit

Replace the optical

unit.

Optical unit

—

Black print

Photoconduc-

tor unit

Replace the

photoconductor unit.

Improper

charging

Replace the PWB-F

board.

PWB-F board

Toner

cartridge

Replace the toner

cartridge.

Poor

development

Replace the PWB-F

board.

PWB-F board

Adjust the print

density using the

printer settings.

Improper print

density setting

—

Defective optical

unit

Replace the optical

unit.

Optical unit

White/black lines

and bands.

Improper

charging

Photoconduc-

tor unit

Replace the imaging

cartridge.

—

Replace the PWB-F

board.

PWB-F board

—

Poor

development

Toner

cartridge

Replace the toner

cartridge.

Dirt on the fusing

roller

Fusing roller

Clean the fusing roller.

Rev. A

5-9

Troubleshooting

Symptom

EPL-5500W Service Manual

Table 5-12. Print Quality Anomalies (Continued)

Possible Cause

Part Name

PWB-F

Check Item

Remedy

Toner smudges on Improper

the back side of the charging

sheet.

Replace the PWB-F

board.

—

Poor

development

Replace the PWB-F

board.

PWB-F

Replace the fusing

unit.

Improper fusing

Fusing unit

—

Offset print

Replace the fusing

unit.

Improper fusing

Fusing unit

—

Image transfer

unit

Replace the image

transfer unit.

White spots

—

Poor image

transfer

Replace the PWB-F

board.

PWB-F

5-10

Rev. A

Chapter 6 Maintenance

Table of Contents

6.1 MAINTENANCE

6-1

6.1.1 User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1.1.1 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1.1.2 Replacement of Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6.1.2 Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6.1.2.1 Periodic Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6.1.2.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

List of Figures

Figure 6-1. Position of the Special Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Figure 6-2. Cleaning the Electrode Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

List of Tables

Table 6-1. Periodic Service Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Table 6-2. Cleaning Parts and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6-ii

Rev. A

EPL-5500W Service Manual

Maintenance

6.1 MAINTENANCE

The EPL-5500W is a page printer that uses an electrophotographic printing method. Unlike most impact or

ink-jet printers, the key components in the electrophotographic process are integrated into two expendable

units (the photoconductor unit and toner cartridge). Therefore, periodic replacement of them is essential to

ensure high-quality output. Other maintenance items are also described in this chapter, which is divided into

two sections: user maintenance (preventive maintenance) and service maintenance (repair).

6.1.1 User Maintenance

Users can achieve maximum print quality from the printer by following the procedures below:

6.1.1.1 Cleaning

This section describes the cleaning required for optimal print quality.

❒

External Cleaning

Be sure to disconnect the printer from the power outlet before cleaning it. Wipe the cover and external parts

of the printer with a damp cloth that has been soaked in a neutral cleaning solution.

❒

Internal Cleaning

Be sure the printer has been disconnected from the power supply and that the fusing unit has cooled down. If

the electrode comb of the image transfer unit is dirty, clean it with a special tool, using the following steps:

1. Pick up the electrode comb cleaner from the upper unit.

2. Wipe the electrode comb surface from end to end with the electrode comb cleaner several times.

Figure 6-1. Position of the Special Tool

Electrode Comb Cleaner

Cleaner Section

Pre-image Transfer Roller

Image Transfer Rear

Guide

Figure 6-2. Cleaning the Electrode Comb

Rev. A

6-1

Maintenance

EPL-5500W Service Manual

6.1.1.2 Replacement of Consumables

This printer uses a consumable photoconductor unit and toner cartridge. The life of photoconductor unit is

20,000 pages and the toner cartridge life is 3,000 pages, when printing on A4- or letter-size pages with a 5%

print ratio.

If printed images become faint, remove the toner cartridge and gently shake it. This will distribute the toner

and may make the images darker. If the image is still too light, replace the toner cartridge cartridge.

If the printed image remains faint after you have replaced the toner cartridge, change the photo-

conductor unit.

6-2

Rev. A

EPL-5500W Service Manual

Maintenance

6.1.2 Service Maintenance

This section describes the periodic service maintenance and the cleaning required.

6.1.2.1 Periodic Service Maintenance

The following units need service maintenance periodically, because they are subject to functional

deterioration as the total number of printed pages increases, resulting in bad print quality.

Table 6-1. Periodic Service Maintenance

Unit

Service Interval

Image transfer unit

Fusing unit

Approx. 100,000 pages

The service interval listed above is only a reference value. You do not need to perform service maintenance

exactly at this time.

6.1.2.2 Cleaning

Some parts of this printer require regular cleaning. Clean each part using the specified method and tools.

(Refer to Chapter 3 for disassembly procedures.)

Table 6-2. Cleaning Parts and Procedures

Parts Name

Paper take-up roller

Cleaning Procedure

Wipe the surface with a dry soft cloth.

Upper fusing roller (in fusing unit)

Lower fusing roller (in fusing unit)

Thermistor (in fusing unit)

Dip a soft cloth in silicon oil and wipe the dust off.

Dip a soft cloth in denatured alcohol and wipe the

dust off.

Paper separator and rollers (in fusing unit)

Rev. A

6-3

Maintenance

EPL-5500W Service Manual

6-4

Rev. A

Appendix A Reference Materials

Table of Contents

A.1 CONNECTOR PIN ASSIGNMENTS

A-1

A.1.1 Main Board (C180 MAIN-B Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

A.2 CIRCUIT DIAGRAM

A-7

A.3 CIRCUIT BOARD COMPONENT LAYOUT

A-12

List of Figures

Figure A-1. Connector Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Figure A-2. C180 MAIN Circuit Diagram (1/2) . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

Figure A-3. C180 MAIN Circuit Diagram (2/2) . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

Figure A-4. PWB-E (120V) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10

Figure A-5. PWB-E (220/240V) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . A-11

Figure A-6. C180 MAIN Component Layout (Side A) . . . . . . . . . . . . . . . . . . . A-12

Figure A-7. C180 MAIN Component Layout (Side B) . . . . . . . . . . . . . . . . . . . A-13

List of Tables

Table A-1. Board Connector Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Table A-2. CN2 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Table A-3. CN202 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-4. CN203 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-5. CN204 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-6. CN205 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-7. CN206 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-8. CN207 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Table A-9. CN208 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Table A-10. CN209 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Table A-11. CN210 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Table A-12. CN211 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

EPL-5500W Service Manual

Appendix

A.1 CONNECTOR PIN ASSIGNMENTS

Figure A-1 illustrates the interconnection of the primary components. Table A-1 gives the size and a

description of each connector.

Main Motor

CN206

C180 MAIN

Board

ϕB

M 1

Polygon Motor

M 2

ϕB

HO ST

P C

CN210

CN 1M

CN 2

POLYGON CTL

5 VDC

G N D

24 VDC

N C

Fan Motor

CN211

FA N

24 VDC

M 3

Paper Exit Sensor

CN3S

CN208

ANODE (PC1)

G N D

PC3

Paper Take-up Sensor

CN1S

CN203

ANODE (PC1)

GND

PC1

N C

P C1

24 VDC

FEED1

Paper Take-up

Solenoid

CN 1D

CN205

CN2S

DC5V

DATA

GND

PWB - D

Laser Diode

Drive Board

SL1

LD APC1 (LDVR1)

LD APC1 (LDVR2)

C O

S SCAN

Fusing Roller

Thermistor

CN202

THERMISTOR

VDC

TH 1

Fusing Roller

Heater Lamp

CN204

CN1E

CN1F

CN207

CN3E

HV SEL1

HV SEL2

PWB-F

PWB- S

HEAT

N C

HEAT L

H 1

24 VDC

G N D

GND

Image

Transfer

Housing

High

Voltage

Unit

T F1

5 VDC

BIAS MON

G N D

PWB-E

Fusing Roller Thermal Fuse

FUSER LAMP

24 VDC

Power

Unit

Image

Transfer

Charger

Interlock

Switch

CN1A CN209

1 2

24 VDC

FEED2

N C

Inlet

Board

Power SW

Inlet

Paper Take-up

Solenoid

VDC

GND

PWB- A

P EMP2

PSIZE0

2NDBIN

mm/inches

SL2

10 UNIVERSAL

11 CHECK1

24 VDC

FEED2

CHECK2

2nd Paper Feeding

Unit (Optional)

Figure A-1. Connector Connections

Rev. A

A-1

Appendix

EPL-5500W Service Manual

Table A-1. Board Connector Summary

Connector

Description

Pins

Reference

Main Board (C180 MAIN Board)

CN1

CN2

Video interface (not used)

20 pins

—

Centronics parallel interface

Connector for thermistor

36 pins Table A-2

CN202

2 pins

Table A-3

Connector for paper take-up solenoid and paper take-up

sensor

CN203

CN204

6 pins

Table A-4

Connector for high-voltage supply board (PWB-S and PWB-F

board)

8 pins

Table A-5

CN205

CN206

CN207

CN208

CN209

CN210

CN211

Connector for optical unit

7 pins

4 pins

5 pins

3 pins

Table A-6

Table A-7

Table A-8

Table A-9

Connector for motor

Connector for power supply board (PWB-E board)

Connector for paper exit sensor

Connector for lower paper cassette

Connector for optical unit

12 pins Table A-10

5 pins Table A-11

2 pins Table A-12

Connector for fan

Power Supply Board (PWB-E Board)

CN1

CN2

CN3

Connector for AC power inlet

Connector for main board

Connector for heater lamp

4 pins

5 pin

—

Table A-8

—

3 pins

High-Voltage Supply Board (PWB-F Board)

CN1

CN2

Connector for main board

8 pins

3 pins

Table A-5

—

Connector for paper take-up sensor

A-2

Rev. A

EPL-5500W Service Manual

Appendix

A.1.1 Main Board (C180 MAIN Board)

Table A-2. CN2 Pin Assignments

Pin No. Signal Name

I/O

Description

STROBE signal

Data bit 1

Data bit 2

Data bit 3

Data bit 4

Data bit 5

Data bit 6

STROBE

DATA1

DATA 2

DATA 3

DATA 4

DATA 5

DATA 6

DATA 7

DATA 8

ACKNLG

BUSY

Data bit 7

Data bit 8

ACKNLG signal

BUSY signal

PE signal

SLCT signal

AUTO-FEED signal

Not connected

GND

SLCT

AUTO-FEED

—

GND

CHASSIS

CHASSIS GND

—

GND

—

Not connected

GND

INIT signal

ERROR signal

GND

Not connected

+5 VDC

SLCT IN signal

GND

INIT

ERROR

GND

SLCT IN

—

Rev. A

A-3

Appendix

EPL-5500W Service Manual

Table A-3. CN202 Pin Assignments

Pin No. Signal Name

I/O

Description

—

+5 VDC

Fuser temperature

Table A-4. CN203 Pin Assignments

Pin No. Signal Name

I/O

Description

PS1

GND1

PS1

+24V

FEED1

—

Paper take-up sensor

Ground

Paper take-up sensor

Not connected

+24 VDC

Paper take-up solenoid drive

Table A-5. CN204 Pin Assignments

Pin No. Signal Name

I/O

Description

HV-C

HV-T

HV-S

HV-S2

HV-B

BIAS-M

GND2

+24

—

Ground

+24 VDC

Table A-6. CN205 Pin Assignments

Pin No. Signal Name

I/O

Description

SSCAN

LD-CTL

LDAPC2

LDAPC1

GND1

Horizontal synchronous signal

Laser power signal

Laser power adjust 2

Laser power adjust 1

Ground

—

LDATA

+5V

Laser data

+5 VDC

Table A-7. CN206 Pin Assignments

Pin No. Signal Name

I/O

Description

Motor phase A

Motor phase B

A-4

Rev. A

EPL-5500W Service Manual

Appendix

Table A-8. CN207 Pin Assignments

Pin No. Signal Name

I/O

Description

+24V

—

+24 VDC

Ground

+5 VDC

GND2

GND1

+5V

FUSER

Heater lamp on

Table A-9. CN208 Pin Assignments

Pin No. Signal Name

I/O

Description

Paper exit sensor

Ground

PS3

GND

—

Table A-10. CN209 Pin Assignments

Pin No. Signal Name

I/O

Description

+24 V

FEED2

+5V

GND1

PE2

—

+24 VDC

Lower cassette solenoid on

Not connected

+5 VDC

Ground

Lower cassette paper empty

PSIZ0

PSIZ1

PSIZE2

CHECK1

CHECK2

CHECK3

Table A-11. CN210 Pin Assignments

Pin No. Signal Name

I/O

Description

Not connected

+24 VDC

Ground

+5 VDC

Polygon motor control

—

+24V

GND2

+5V

P-CTL

Table A-12. CN211 Pin Assignments

Pin No. Signal Name

I/O

Description

+24V

FAN

—

+24 VDC

Fan control

Rev. A

A-5

Appendix

EPL-5500W Service Manual

A-6

Rev. A

EPL-5500W Service Manual

Appendix

A.2 CIRCUIT DIAGRAMS

Figure A-2. C180 MAIN Circuit Diagram (1/2)

Rev. A

A-7

Appendix

EPL-5500W Service Manual

A-8

Rev. A

EPL-5500W Service Manual

Appendix

Figure A-3. C180 MAIN Circuit Diagram (2/2)

Rev. A

A-9

Appendix

EPL-5500W Service Manual

Figure A-4. PWB-E (120 V) Circuit Diagram

A-10

Rev. A

EPL-5500W Service Manual

Appendix

Figure A-5. PWB-E (220/240 V) Circuit Diagram

Rev. A

A-11

Appendix

EPL-5500W Service Manual

A.3 CIRCUIT BOARD COMPONENT LAYOUTS

Figure A-6. C180 MAIN Component Layout (Side A)

A-12

Rev. A

EPL-5500W Service Manual

Appendix

Figure A-7. C180 MAIN Component Layout (Side B)

Rev. A

A-13

EPSON OVERSEAS MARKETING LOCATIONS

EPSON AMERICA, INC

20770 Madrona Avenue,

P.O. Box 2842

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Phone: (800) 922-8911

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Zülipicher Straße 6, 40549 Düsseldorf

Germany

Phone: 0211-56030

Fax:

0211-504-7787

Fax:

(310) 782-5220

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Phone: 582.15.00

Fax:

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Fax:

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Phone: 02-415-9000

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Fax:

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Phone: 585-4600

Phone: 2-717-7360

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As of October 1995

EPSON

Printed in Japan

95.11-.01-S

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