LG LAD-9600, Руководство по обслуживанию

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3-6
SEG LCD don’t turn on.
Do INV_PWR turn on?
(CN801 : pins 6, 7) V10_LED On?
(CN801 : pins 10, 11) Check TFT LCD Board and
FFC.
NO
NO
NO
NO
YES
YES YES
YES
Check Q704 at TFT LCD
Board.
Do V5.0_D turn on?
(CN801 : pins 8, 9)
Check TFT LCD Board.
Do IC801 appear a normal
signal?
YES
Check SEG.
Check IC801.
3. SEG LCD PART
1) When SEG LCD don’t turn on
4. FRONT KEY PART
1) When KEY don’t respond
Check IC615.
KEY don’t respond.
Do KEY Scan-Out Pulse appear at
IC615 pins 109~114?
NO
YES
YES
NO
YES
Check the defect of Key.
Do KEY Scan-In Pulse appear at IC615
pins 118~122 when don’t press any Key?
Some KEY is pressed.