Toshiba DVD Player NTDVT006BK User Manual

NTDVT006BK

TOSHIBA

Service Training

"Customer Satisfaction Through Knowledge"

TOSHIBA

DVD

SERVICE GUIDE

TOSHIBA AMERICA CONSUMER PRODUCTS,

INC.NATIONAL SERVICE DIVISION

NATIONALTRAINING DEPARTMENT

1420-BTOSHIBA DRIVE

TOSHIBA AMERICA CONSUMER PRODUCTS, INC.

LEBANON,TN 37087

"In Touch With Tomorrow"

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INTRODUCTION

1. This book supplements video tape

NTDVT006, Toshiba DVD Servicing. It

covers the mechanical disassembly and

reassembly of a DVD player, and how to

diagnose a problem to the board level. For

more detailed information and drawings refer

to service manual 810-9601. For connector

locations and pin identification, refer to the

drawings in the back of this book.

CONTENTS

INTRODUCTION ............................................ 1

DISASSEMB L Y ............................................... 1

LASER DISASSEMBLY ................................. 3

LASER REASSEMBLY................................... 5

DVD REASSEMBLY....................................... 6

TROUBLESHOOTING.................................... 7

Introduction ................................................... 7

Power Supply Checks .................................... 8

Front Panel Checks ........................................ 9

Laser Checks................................................ 10

Focus & Tracking Checks............................ 11

Loading Motor Checks ................................ 14

Color Difference Output Checks ................. 14

Summary...................................................... 15

PC Board Layout ......................................... 16

Connector Pinouts ....................................... 17

2. The DVD player is very static sensitive, so

always use a static mat and wrist strap when

servicing the player. Failure to take these

precautions could destroy or reduce the life of

the laser and many other components.

DISASSEMBLY

1. Retract the 5 screws holding the cover in

place.

2. Lift off the cover.

3. If a disc is stuck in the player it can be manu-

ally removed by pushing the eject level with a

long screwdriver.

4. After the tray pops out, pull it completely

open and remove the disc.

5. To place the unit in the service position,

remove the shield covering the main board.

6. Remove the 4 screws on the main board and

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the 2 self tapping screws on the back panel.

7. Remove the top portion of the shield and set

it aside.

8. Unclip the wires leading to the power supply.

9. Lift the main board and remove the bottom

portion of the shield. Then rest the main

board in the built-in holders.

10. Align the notch in the board with the bottom

of the built-in holder to avoid damaging the

main board.

11. Before unplugging the flex cables, the laser

pickup must be shorted to prevent static

damage to the laser.

21. Remove the 4 screws holding the power

supply.

22. Lift the power supply board out of the cabi-

net.

23. Remove the 3 screws holding the laser me-

chanical assembly.

24. Lift the assembly out of the cabinet.

25. Remove the component video output board by

retracting 2 screws on the back of the cabinet.

26. Remove the front panel by retract 4 screws, 1

on each side and 2 on the top.

27. Releasing the tabs and pull the panel away

from the cabinet.

12. To access the laser pc board, remove the

safety shield covering the laser assembly.

13. Remove the 2 screws holding the disc clamp

and lift it off the laser assembly.

28. The front panel circuit boards are remove by

retracting 6 screws,.and lifting the circuit

boards out of the front panel.

14. Cut the cable tie that holds the power supply

cable to the cross bracket.

LASER DISASSEMBLY

15. Remove the 2 screws holding the cross bar

and lift the cross bar off the player.

16. Remove the 2 screws holding the disc tray in

the player.

17. Pull the tray out of the player.

18. Carefully solder the pad with a small tipped

soldering iron.

19. Remove the main board by gently unplugging

the flex cables and the power supply connec-

tor.

1. Unplug the flex cable attached to the laser

slide assembly.

2. Remove the 4 screws and washers holding the

laser slide assembly in place.

3. Lift the laser slide assembly out and set it

aside.

4. Retract 2 screws at the rear of the mechanical

assembly.

5. Remove the lift assembly.

6. Remove the loading motor by first taking off

the loading belt.

20. Lift the main board out of the holders.

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7. Retract the 2 screws on either side of the

motor pulley.

LASER REASSEMBLY

8. Turn the mechanical assembly over and

release the 3 tabs holding the loading motor

PC board.

1. Start the laser reassembly by reinstalling the

feed motor. Be sure the red wire is attached

to the number 2 terminal, and the black wire

to the number 1 terminal.

2. Push the feed motor gear onto the shaft of the

feed motor.

3. Check the distance between the ring magnet

and the hall switches with a 0.5mm feeler

gauge, and adjust the height of the gear as

necessary.

4. Reinstall the center gear making sure that the

small gear is on top.

5. Rotate the upper and lower portions of the

last gear until the alignment holes match.

6. Once the holes are aligned, position the slide

against the stops near the feed motor.

7. Position the gear over the shaft and gently

push it down while slightly pushing the rack

gear with your thumb until the gear slides

easily into place.

8. Install the cut washer to hold the gear in

place.

9. Position the loading motor circuit board on

the mechanical assembly and snap it back into

place. Then attach the flex cable to the

bottom of the assembly.

9. Lift the pc board out of the mechanical

assembly and gently detach the flex cable.

10. The laser slide assembly is replaced as a

whole; however, the feed motor, 3 gears, and

2 hall switches can be replaced individually.

11. Remove these parts by first taking off the cut

washer and the gear that drives the slide.

12. Next, remove the middle gear.

13. The final gear is pressed onto the motor shaft,

and has a ring magnet on its lower side to

provide slide position information along with

the hall switches. Never try to remove or

replace this gear with the other 2 gears in

place, because you risk breaking the ring

magnet.

14. To safely remove the gear, turn it so a solid

center portion is facing the outside of the

assembly. Then place a very small screw-

driver under the gear until the blade contacts

the motor shaft and gently push down.

15. Remove the 2 screws holding the feed motor.

16. Unsolder the red and black wires and remove

the feed motor.

10. Turn the mechanical assembly over and make

sure the tray position switch is in the cut out

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portion of the lever.

4. Replace the laser mechanical assembly.

5. Replace the power supply.

11. Push the slider back and forth to confirm the

operation of the opening and closing gears.

12. Replace the 2 screws holding the loading

motor in place.

13. Replace the loading belt.

14. Slide the lift assembly into place, and replace

the 2 holding screws.

15. Manually operate the tray loading and lift

mechanisms to ensure they operate properly.

16. Set the laser slide assembly into the mechani-

cal assembly, and replace the 4 screws and

washers.

6. Place the main board in the service position

and connect all of the flex cables.

7. Remove the solder from the shorting pad.

8. Install the disc clamp and the cross bar.

9. Replace the safety shield.

10. Slide the disc tray in and replace the locking

screws.

11. Place the main board in its normal position

with the shield surrounding it and fasten them

in place.

12. Install the cover.

17. Insert the flex cable into the connector on the

laser slide assembly, and lock it in place.

18. Move the slide assembly back and forth to

ensure the flex cable doesn’t interfere with its

operation.

19. If the flex cable doesn’t allow the slide

assembly to easily reach the end of its travel,

push the flex cable down so it slides under the

metal plate of the slide assembly.

TROUBLESHOOTING

Introduction

1. This section of the book covers troubleshoot-

ing the DVD player to the board level. When

voltages or waveforms are shown refer to the

appropriate connector in the service manual

or the back of this book.

2. Before removing any connectors in the player,

always remove AC power first. Failure to do

so will severely damage the player.

DVD REASSEMBLY

1. Reinstall the front panel circuit boards back in

the front panel.

2. Attach the front panel to the unit and replace

the screws.

3. Before you take the player apart, thoroughly

check its operation and note all symptoms.

4. Be sure the audio selector switch is in the

proper position when you check out the audio.

In the left position you get AC-3 audio and no

3. Reinstall the component video output board.

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left and right analog audio. In the right

position you get left and right analog audio

and no AC-3 audio. If you change the position

of the audio selector switch, you must cycle

the power so the change is recognized by the

microprocessor.

4. Recheck the dc voltages on pins 2, 3, 4, 5, 6,

7, 8, 12, 13, and 14.

5. If the voltages are still improper or missing

there is a problem with the power supply.

However, if the voltages are normal the power

supply is alright, and there is most likely a

problem on the main board or 1 of the other

boards that is loading down the power supply.

6. For a loading problem on a board other than

the main board, remove AC power and

reconnect the power supply to the main board.

Remove the connector to the front panel and

apply AC power. Check the voltages supplied

to the front board. Repeat this process for

each board, and when the board causing the

problem is disconnected the power supply

voltages should return to normal.

5. Be sure the video selector switch on the

SD3006 is in the proper position when you

check out the video outputs. In the left

position you get composite and S video. In

the right position you get component video.

6. If the color difference cables are reversed the

picture information is present, but the color

has a blue tint.

7. Putting the luminance cable in the wrong

connector causes a very visible sync problem.

8. A dirty disc can cause playability problems,

.so be sure the disc is clean. Use a soft cloth

to clean a disc. Refer to the cleaning instruc-

tions in the service manual.

Front Panel Checks

1. Using a meter check pin 2 for the ever 5 volts,

pin 8 for the -24 volts, pin 9 for the F+, and

pin 10 for the F-.

Power Supply Checks

1. Push the power button and see if the red

power led comes on.

2. Check the dc voltages on pins 2, 3, 4, 5, 6, 7,

8, 12, 13, and 14 of CN801.

2. Using a scope, check the front panel reset

signal at pin 1 of CN602 when AC is applied

to the player. The signal goes high when

power is applied to the player.

3. If any of these voltages are improper or

missing, or the power LED does not come on,

unplug the power supply from the main board

and jumper pins 2 and 3 on CN801.

3. To check the communications between the

main board and the front panel, connect

channel 1 of the scope to the FSTBX signal

on pin 7 of CN602. Communications be-

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tween the 2 boards occur during low transi-

tions.

4. Using pin 7 as the reference, monitor the

clock signal on pin 6 of CN602. There are

eleven negative clock pulses during 1 low

cycle of the FSTBX signal.

5. Check the DSPSO signal on pin 5 of CN602.

This is the serial information going to the

front panel.

6. Check the DSPSI signal on pin 4 of CN602.

This is the serial information coming from the

front panel. Again, notice how it changes

when a disc is playing.

volts peak to peak.

3. Clean the objective lens with a cotton swab

and alcohol if the signal is low.

4. Recheck the RF signal, and if it is still low

replace the laser slide assembly.

5. Another way to check the power of the laser

is with a laser power meter. A new laser

should measure about 0.2 milliwatts.

6. You can also visually check the laser during

power on. However, be sure not to look

directly into the laser.

7. The RF signal for a CD is checked at TP501.

It also looks like normal eye pattern, but its

frequency is lower than that of the DVD.

Normally it is about 1.6 volts peak to peak.

7. If the signals are missing or improper, remove

power from the player, and gently pull the

flex cable out of CN602.

8. Measure the clock signal, the DSPSO signal,

and the DSPSI signal using the FSTBX signal

as a reference. All of the signals are present

except the DSPSI signal.

Focus and Tracking Checks

1. For a focus problem, check the focus error

signal at TP504. Cycle the power off then on

to see the operation of the focus error signal.

Gently tap the side of the player to check the

operation of the signal. If the signal is miss-

ing or improper, the main board is most likely

at fault.

2. Play a CD and check the focus error signal at

TP504.

3. For a tracking problem, check the tracking

error signal at TP507. Cycle the power off

then on to see the operation of the tracking

error signal. Gently tap the side of the player

Laser Checks

1. Check the DVD RF signal at TP502. The

signal should look like a normal eye pattern

with a peak to peak voltage of about 2.7 volts

or higher. This peak to peak measurement

varies from player to player and decreases as

the laser ages.

2. Check the differential RF signals at pins 16

and 17 of CN501. They should be about 0.5

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to check the operation of the signal. If the

signal is missing or improper, the main board

is most likely at fault.

unloaded.

12. For problems associated with the feed motor

or the spindle motor check the signals on

connector CN502.

13. Check the feed motor drive signals at pins 1

and 2 of CN502. They are easiest to see

when the power is cycled on and the player is

put in the times 8 scan speed.

14. These signals can also be checked unloaded;

however, the drive signal goes to 4 volts DC

when AC is applied and power is turned on.

If the dc signal is present, the drive signal

from the main board is good.

4. Play a CD and check the tracking error signal

at TP507

5. Check for a focus or tracking problem at pins

1, 2, 3, and 4 of CN501. These are the focus

and tracking drive signals going to the laser

slide assembly. You should see an ac signal

riding on about 4 volts dc.

6. If the drive signals are being loaded down,

remove power from the player and unplug the

flex cable to CN501.

7. Plug the player in and turn on the power

while monitoring pin 1 of CN501. The drive

signal rises to 4 volts dc if it’s good. This

also applies to the other drive signals on pins

2, 3, and 4.

8. For DVD tracking problems check the track-

ing error signals going to the main board on

pins 12, 13, 14, and 15 of CN501.

15. To check the feedback from the feed motor

hall switches, monitor pins 5, 6, 7, and 8 of

CN502 while cycling power and playing a

disc in times 8 scan.

16. If a disc won’t play you can still check the

hall switches, turn the power off and push the

slide away from the spindle motor. Then turn

the power on and monitor the signals as the

slide moves back to its default position.

17. The dc drive voltage for the feed motor hall

switches is monitored at pin 3.

9. For CD tracking problems check the tracking

error signals going to the main board on pins

ten and eleven of CN501.

10. If the focus coil does not move up and down

or the laser does not come on, check for plus

5 volts on pin 19 of CN501 and plus 2 volts

on pin 20 of CN501.

18. The spindle motor drive signals are checked

at pins 17, 18, and 19. They are easiest to see

when the power is cycled on and the player is

put in the times 8 scan speed.

11. If the voltages are missing or improper,

unplug the flex cable and measure them

19. These signals can also be checked unloaded;

however, you can only see a momentary

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attempt at the drive signal coming on.

20. Check the feedback from the spindle motor

hall switches by monitoring pins 9 through 13

and pin 15 while cycling power and playing a

disc in times 8 scan.

21. Check the spindle motor hall switches manu-

ally by rotating the spindle motor with your

finger while monitoring pins 9 through 13 and

pin 15.

color difference outputs on the back of the

player.

3. Connect channel 1 of the scope to the lumi-

nance output on pin 1 of CN302.

4. Connect channel 2 of the scope to the Cr

signal output on pin 3, and ensure it is in sync

with the luminance signal and the proper peak

to peak voltage.

5. Connect channel 2 of the scope to the Cb

signal output on pin 5, and ensure it is in sync

with the luminance signal and the proper peak

to peak voltage.

22. The dc drive voltages for the spindle motor

hall switches are checked at pins 14 and 16.

Loading Motor Checks

1. Loading motor operation is checked at

CN503.

2. The loading motor drive signal on pin 1

drives the tray out, and the loading motor

drive signal on pin 2 pulls the tray in.

3. The tray position switch signal at pin 3 is high

when the tray is out, and low when the tray is

in.

6. If the player won’t switch video modes,

monitor pin 7 while moving the switch. The

pin is high in the composite video mode, and

low in the component video mode.

Summary

1. If the problem is isolated to the main board or

the laser slide assembly, replace the board or

the slide assembly.

4. The tray position switch signal at pin 4 is low

when the tray is out, and high when the tray is

in.

2. Some parts on the laser slide assembly are

replaced. These include the feed motor, the

feed motor drive gears, and the hall switches.

3. If the problem is isolated to any of the other

boards, repair them to the component level.

Color Difference Output Checks (CN302 -

SD3006 Only)

1. Play a test disc with a straight color bar

pattern.

2. Place the player in pause and switch to the

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CN801

EVER 5V

POWER ON

+5V

CN302

Y/R OUT

CN501

T+

F+

F-

T-

GND

Cr OUT

GND

Cb OUT

GND

+9V

+8V

+5V

+3V

GND

-24V

F-

CDPD

GND

NT/RGBX

GND

MON

VOR

CN602

DSP - RESET

EVER 5V

GND

DSPSI

DSPSO

DSPCK

FSTBX

-24V

F+

RFP

RFN

GND

VCC

VREF

CN502

FMP

FMN

ADL

GND

HO2N

HO1N

HO1P

HO2P

V+

F+

F-

21 LAYER

CN503

LDMN

LDMP

TCLS

TCPN

GND

W+

U+

W-

V-

H-

U-

H+

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