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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
Main LCD control signals are generated by QSD8650. Those signal’s path are :
QSD8650
Æ
LCD Module
[UG{Gz
4.15 Main LCD trouble
The LCD works
START
Press POWER key
to turn the power on
Is the circuit powered?
Follow the Power ON
trouble shooting
LCD display OK?
Check TP1 (C550)
TP2 C549), TP3 (FL504)
TP4 (D504_PIN4)
TP5 (U508)
No
Yes
Yes
Disconnect and reconnect
LCD connector
Change the Main BD
No
End
Yes
Change the LCD module
No
Содержание E900
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