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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.17 Main LCD trouble
Main LCD control signals are generated by STN8810. Those signal’s path are :
STN8810
→
70-pin main connector (CN400 in main PCB)
→
70-pin connector (CN400 in Main-Folder
FPCB)
→
50-pin connector (CN103 in Main-Folder FPCB)
→
LCD Module
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_2.7V, LCD_NRESET,
LCD_DATA(0) in Main BD
No
Yes
Yes
No
Disconnect and reconnect
70-pin , 50-pin B to B
connector
Change the Main BD
No
End
Yes
Check the same signal
in Main-Folder FPCB
No
Yes
Change the Main-Folder FPCB
& re-check
Display OK?
Yes
Change the LCD module
No
Yes
Change the Backlight Driver IC
in Key PCB
No
Yes
No
Содержание KT610
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