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4. TROUBLE SHOOTING
4.17 Main LCD trouble
Main LCD control signals are generated by STN8810. Those signal’s path are :
STN8810 -> 70-pin main connector(CN201 in main PCB) -> 70-pin connector (CN102 in slider FPCB)
-> 40-pin connector (CN101 in slider FPCB) -> 40-pin connector (CN101 in SUB PCB) -> LCD zip
connector (CN100 in SUB PCB) -> LCD Module
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
The LCD works
START
Press END key
to turn the power on
Is the circuit powered?
Follow the Power ON
trouble shooting
LCD display OK?
Check AP_VDD_LCD_2.8V, LCD_NRESET,
LCD_DATA(0) in Main BD
No
Yes
Yes
No
Disconnect and reconnect
70-pin , 40-pin B to B,
and 35-pin zip connector
Change the Main BD
No
End
Yes
Check the same signal
in SUB BD
No
Yes
Change the slider FPCB
& re-check
Display OK?
Yes
Change the LCD module
No
Yes
Change the SUB BD
No
Summary of Contents for KS10
Page 1: ...Date July 2007 Issue 1 0 Service Manual Model KS10 Service Manual KS10 Internal Use Only ...
Page 246: ...Note ...
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