LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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4.12 Keypad Backlight Troubleshooting
Key Pad Back Light is on as below :
Key pressing
→
KYBD_BACKLIGHT go to 0V
→
Main LED On
Start
Change the main board
Check battery
NO
YES
YES
Key press
Change the main board
YES
NO
VPWR is
over 3.2V?
VA501 is 0V ?
+VPWR
0 V
Содержание CU575
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