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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.15 Main LCD trouble
Main LCD control signals are generated by MSM6280. Those signal’s path are :
MSM6280
→
Z ORAN (Multimedia Chip)
→
40-pin connector(CN300 in Main PCB)
→
40-pin
connector (in LCD Module)
The LCD works
START
Press END key
to turn the power on
Is th e ci rcuit po wered?
Follo w the P ower ON
trouble shoo ting
LCD display OK?
Check L CD_VDD_2.8V, LCD_RESET_N,
LCD_DATA[ 0~15] in M ain BD
No
Yes
Yes
No
Disconn ect and reconn ect
40-pin B to B conn ector
Change the Main BD
No
End
Yes
Displ ay OK?
Yes
Change th e LCD module
No