3. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
3.12 LCD
Main LCD control signals are generated by MSM8230. Those signal’s path are :
MSM8230-> LCD Module
START
Press power key To turn the power on.
End
Disconnect and reconnect
LCD connector.
LCD display OK?
Check +1.8V_L23_MSM_PLL2
(C6014) TP1 OK?
Check
5V(C6021) TP2
DDVDL_-5V(C6020) TP3 OK?
LCD display OK?
Is the circuit powered?
Change the LCD module.
LCD display OK?
No
No
No
No
No
Yes
Yes
Yes
Follow the power on trouble shooting.
Change the TPS65132 (U6002) or main BD.
Change the PM8038 (U5000) or main BD.
Yes
Yes