Seg Lcd Part; Front Key Part - LG LAD-9600 Service Manual

3. SEG LCD PART

1) When SEG LCD don't turn on
SEG LCD don't turn on.
YES
Do INV_PWR turn on?
(CN801 : pins 6, 7)
YES
Do V5.0_D turn on?
(CN801 : pins 8, 9)
YES
Do IC801 appear a normal
signal?
YES
Check SEG.

4. FRONT KEY PART

1) When KEY don't respond
KEY don't respond.
Do KEY Scan-Out Pulse appear at
IC615 pins 109~114?
Do KEY Scan-In Pulse appear at IC615
pins 118~122 when don't press any Key?
Some KEY is pressed.
NO
V10_LED On?
(CN801 : pins 10, 11)
Check Q704 at TFT LCD
Board.
NO
Check TFT LCD Board.
NO
Check IC801.
YES
YES
YES
NO
YES
NO
NO
3-6
Check TFT LCD Board and
FFC.
Check IC615.
Check the defect of Key.