Wednesday, November 11, 2015

PANASONIC TH-L42S10X SERVICE MODE AND POWER LED FLASHING SYMPTOMS

PANASONIC TH-L42S10

SERVICE MODE AND POWER LED FLASHING SYMPTOMS 

Power LED Blinking Timing
1. Subject
Information of LED Flashing timing.
2. Contents
When an abonormality has occurred in the unit, the protection circuit operates and resets to standby mode. At this time, the defective block can be identified by the number of blinking of the Power LED on the front panel of the unit as follow:
POWER LED FLASHING
Blinking times
Contents
1


Lamp short circuit protection
Lamp open protection
Arc protection
2
Cooling fan SOS = incomplete connection - no function mode.
3
P board 30V / 18V / 9V decreased / short circuit detection.
4
DTV12V decreased / short circuit , main convertor stop detection.
5
Sub 5V decreased / short circuit detection.
6
Sub 5V decreased / short circuit detection. (same as 5 times LED blinking)
7
Sub 3.3V decreased / short circuit detection.
8
Sub 5V decreased / short circuit detection. (same as 5 times LED blinking)
9
Audio amp SOS.
10
HQ1 incomplete connection, no function mode.
13
When peaks communication error SOS.

How to enter the Service Mode
While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.
Key command
[1] button...Main items Selection in forward direction
[2] button...Main items Selection in reverse direction
[3] button...Sub items Selection in forward direction
[4] button...Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )
How to exit
Turn the television off with the [POWER] button on the main unit or the [POWER] button on the remote control.
VCOM Adjustment (Flicker Adjustment)
General information:
After replacing the LCD panel, TC board (T-CON) or both, the [VCOM] Adjustment has to be done. Data for VCOM Adjustment is different depending on the LCD panel and the data stored in the TC board. Adjustment procedures are as follows.
1. Enter the service mode
While pressing the [ VOLUME ( - ) ] button of the main unit, press the [ INFO ] button of the remote
control three times within 2 seconds.
2. Go into VCOM value indication
Press the [1] button on the remote control to select [ADJUST].
Press the [3] button on the remote control to select [VCOM]
The adjustment value of [VCOM] is displayed.
3. Flicker Confirmation
Press the [5] button on the remote control to display the flicker adjustment screen.
Confirm if flicker can be seen.
No flicker --- Exit from the Service mode.
Flicker --- Adjustment has to be done.
4. VCOM Adjustment (Flicker Adjustment)
This procedure writes into the EEPROM the correct data so the panel does not flicker.
Press the remote control [+/ -] button to delete or minimize the flicker.
Press the [ OK ] button to automatically write the data into the EEPROM (IC9206).
Caution:
The data can be written into the EEPROM only 15 times. Don’t press the [ OK ] button many times.
If the data cannot be written, replace the TC board or IC9206 with a new one.
5. Exit from Service mode
Press the [ POWER ] button on the main unit or the [ POWER ] button on the remote control.
How to access SVR TOOL
1. Select [SRV-TOOL] in Service Mode.
2. Press [OK] button on the remote control.
Display of SOS (Shutdown) History
SOS History (Number of LED blinks ) indication.
From the left side; Last SOS, before Last, two occurrences before last, 2nd occurrence after shipment, 1st occurrence after shipment.
This indication except the 2nd and 1st occurrence after shipment will be cleared by reset.
To exit
Disconnect the AC cord from the wall outlet.
1. Self-check display only: While in TV reception mode, press the [VOLUME ( - )] button on the main unit and simultaneously press the [OK] button on the remote control for 3 seconds or more.
2. Self-check display and forced to factory shipment setting: While in TV reception mode, press the [VOLUME ( - )] button on the main unit and simultaneously press the [MENU] button on the remote control for 3 seconds or more.