Lcd Part - LG LAD-9600 Service Manual

2. LCD PART

1) TFT LCD Trouble
Screen don't Turn on.
Are V9.0_LCD, V5.0_DA & V5.0_D normal
values? (CN701 : Pins 37, 39)
Is TFT LCD Harness a normal state?
(AC power)
Do RGB & Sync Signal appear at CN701
pins 2, 4, 6, 9, 12?
Does Micom Clock appear at IC702 pin 44?
Does RGB Signal appear at IC701
pins 90, 93, 94?
Defective TFT LCD
YES
YES
YES
YES
YES
YES
NO
Check Main Board Power(IC100, IC102) and
Solve a Problem.
NO
Check Inverter Module and Solve a Problem.
NO
Check whether Main Board is normal or not
and whether FPC Cable is down or not and
Solve problem.
NO
Do Micom communicates with Main Board?
(IC702 : Pins 16, 20, 21, 22)
Check Micom(IC702) and Solve Problem.
NO
Check IC701 and Solve problem
3-4
NO
YES