Panasonic TC-15DT2 Service Manual ▷ View online
The laser diode in the optical pickup may break down due to
potential difference caused by static electricity of clothes or
human body.
potential difference caused by static electricity of clothes or
human body.
So be careful of electrostatic break down during repair of the
optical pickup.
optical pickup.
4.1.
Handling of optical pickup
1. Do not subject the optical pickup to static electricity as it is
extremely sensitive to electrical shock.
2. To prevent the breakdown of the laser diode, an antistatic
shorting pin is inserted into the flexible board (FPC Board).
When removing or connecting the short pin, finish the job in
as short times as possible.
When removing or connecting the short pin, finish the job in
as short times as possible.
3. Be careful not to apply excessive stress to the flexible board
(FPC Board).
4. Do not turn the variable resistor (Laser power adjustment).
1. Human body grounding
Use the antistatic wrist strap to discharge the static
electricity from your body.
electricity from your body.
2. Work table grounding
Put a conductive material (sheet) or steel sheet on the area
where the optical pickup is placed and ground the sheet.
where the optical pickup is placed and ground the sheet.
Caution
The static electricity of your clothes will not be grounded
through the wrist strap. So take care not to let your
clothes touch the optical pickup.
through the wrist strap. So take care not to let your
clothes touch the optical pickup.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ESdevices. (Otherwise hamless motion such as the brushing
together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to
damage an ESdevice).
damage an ESdevice).
3 Precaution of Laser Diode
Caution
This unit utilizes a class I laser. Invisible laser radiation is emitted from the optical pickup lens when the unit is turned on:
1. Do not look directly into the pickup lens.
2. Do not use optical instruments to look at the pickup lens.
3. Do not adjust the preset variable resistor on the optical pickup.
4. Do not disassemble the optical pickup unit.
5. If the optical pickup is replaced, use the manufactures specified replacement pickup only.
6. Use of control or adjustment or performance of procedures other than those specified herin may result in hazardous radiation
exposure.
4 Handling Precautions For Traverse Deck
4.2.
Grounding for electrostatic breakdown prevention
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TC-15DT2
5 Self-check function
When phenomena like "the power fails from time to time" or "the video/audio fails from time to time" can not be confirmed at the
time of servicing, the self-check function can be used to confirm the occurrence and to limit the scope for the defective circuits.Also,
when "the power fails from time to time", display of the color bar on the screen can be used to confirm the occurrence and to limit
the scope for the defective circuits.
time of servicing, the self-check function can be used to confirm the occurrence and to limit the scope for the defective circuits.Also,
when "the power fails from time to time", display of the color bar on the screen can be used to confirm the occurrence and to limit
the scope for the defective circuits.
5.1.
How to access
5.1.1.
Access
Produce TV reception screen and, while pressing [VOLUME-] button on the main unit, press [SLEEP] button on the remote
controller unit simultaneously.
controller unit simultaneously.
5.1.2.
Exit
When one of the buttons for channel selection etc. is pressed, the display returns to the normal screen.
5.2.
Screen display
5.3.
Display phenomenon and treatment method
Display symbol
Phenomenon/condition
Treatment method
H10
No output of video and audio.
Replace tuner (TNR001).
H21
No audio output. Surround function not effective.
Replace IC2303.
H30
No video and audio output. Input switching disabled.
Replace IC4003.
H32
Black and white stripes pattern. Enhanced back light.
Replace DG digital core module.
H36
White stripes on black screen. (No synchronization)
Replace DG digital core module.
H45
No video. OSD and audio output are available.
Replace DG digital core module.
H90
Power interrupted with self-check.
Replace IC1005 on A-PCB.
H91
No OSD.
Replace IC1007 on A-PCB.
H92
Video flutter. Wrong tint for DVD picture.
Replace IC1008 on A-PCB.
H93
No video. OSD and audio output are available.
Replace DG digital core module.
H00
DVD self-diagnosis.
H55
Abnormal voltage detected.
* Any button operation or switching off the power will reset the self-check data.
5.4.
DVD self-diagnosis
Display
Code
Diagnosis
U-
11
Focus error
H
01
Tray loading error
02
Spindle servo error
03
Traverse error
04
Tracking servo error
05
Seek error
06
Power failure
6
TC-15DT2
Display
Code
Diagnosis
F
0**
Disc format error
1**
Disc code error
2**
Decoder LSerror
3**
Display
4**
IIC BUSerror
5**
DSC
6**
ECC error
7**
Microcomputer failure
8**
Microcomputer failure
7
TC-15DT2
6 Servicing method (DVD unit)
6.1.
When disc is unloadable
•
•
•
• When the disc cannot be unloaded even if the unload button on DVD main unit or on remote controller is pressed.
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TC-15DT2
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