D Series Measurements And Adjustments - Panasonic TC-L42D2 Technical Manual

D Series Measurements and Adjustments

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.
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