Panasonic TC-20LA5 / TC-20LE5 Service Manual ▷ View online
5 Troubleshooting Guide
5.1. 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 on the screen can be used to confirm the occurrence and to limit the scope for
the defective circuits.
Any programmed channels, channels caption data and some other user defined settings will be erased and return to factory setting.
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 on the screen can be used to confirm the occurrence and to limit the scope for
the defective circuits.
Any programmed channels, channels caption data and some other user defined settings will be erased and return to factory setting.
5.1.1. How to access
5.1.1.1. 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.
5.1.1.2. Exit
When one of the buttons for channel selection etc. is pressed, the display returns to the normal screen.
5.1.2. Screen display
Display
Ref No.
Description
P.C.B
TNR
TU001
Tuner
TA-Board
AVSW
IC3001
AV Switch
A-Board
MTS
IC2201
Multi Sound Processor
TA-Board
GLP
IC4014
LCD Processor
A-Board
GC3
IC4012
Global Core
A-Board
TEMP
IC1008
Temperature data
A-Board
MEMORY
IC1002
Memory
A-Board
7
TC-20LA5 / TC-20LE5
6.1. Removing the photo stand
(TC-20LE5 only)
1. Lay down the unit so that the rear cover faces upward.
2. Remove the 4 screws.
3. Remove the photo stand cover assembly.
2. Remove the 4 screws.
3. Remove the photo stand cover assembly.
4. Remove the 2 screws.
5. Remove the stand metal.
5. Remove the stand metal.
6.2. Removing the pedestal
assembly (TC-20LA5 only)
1. Remove the 4 screws.
2. Remove the pedestal assembly.
2. Remove the pedestal assembly.
6.3. Removing the rear cover
1. Remove the 2 screws.
2. Remove the 8 screws.
3. Remove the rear cover.
2. Remove the 8 screws.
3. Remove the rear cover.
6.4. Removing the control button
assembly
1. Remove the 2 screws.
2. Remove the control button assembly.
2. Remove the control button assembly.
6 Disassembly and Assembly Instructions
8
TC-20LA5 / TC-20LE5
6.5. Removing the chassis
assembly
1. Remove the 3 screws.
2. Disconnect Inverter couplers and Panel coupler and clam
2. Disconnect Inverter couplers and Panel coupler and clam
A11-Panel coupler wire.
3. Remove the chassis assembly.
6.6. Removing the A-Board, TA-
Board, and Power unit
1. Remove the 12 screws.
2. Remove the A-Board, TA-Board, and Power unit.
2. Remove the A-Board, TA-Board, and Power unit.
6.7. Removing the speaker and the
pedestal bracket
1. Remove the 12 screws.
2. Remove the pedestal bracket.
3. Disconnect speaker terminal.
4. Remove the speaker.
2. Remove the pedestal bracket.
3. Disconnect speaker terminal.
4. Remove the speaker.
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TC-20LA5 / TC-20LE5
6.8. Removing the LCD panel, R-
Board, and V-Board
1. Remove the 4 screws.
2. Remove the LCD Panel.
3. Remove the 2screw.
4. Remove the R-Board and V-Board.
2. Remove the LCD Panel.
3. Remove the 2screw.
4. Remove the R-Board and V-Board.
6.9. Removing the LCD mount
metal
1. Remove the 4 screws.
2. Remove the LCD mount metal.
2. Remove the LCD mount metal.
10
TC-20LA5 / TC-20LE5
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