- 98 -
4. Trouble Shooting
z
MAIN KEY Backlight LED Trouble
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
NO
Is the Voltage level VBAT
3.35 ~4.2?
Backlight will work
properly
START
YES
Check the soldering of
U700 not working
NO
Are all LEDs
LED_CA1~3,SLED_CA1~2
(Slide key) Working?
Charge Battery
YES
LCD_BL_ENM &
LCD_BL_ENS of
U102(Main) is
Working?
YES
Check the condition
If problem, Replace U102(Main)
NO
YES
NO
Check the LCD display
Trouble shooting
Go to LCD Display
Trouble shooting
Summary of Contents for KM710
Page 1: ...Date May 2008 Issue 1 0 Service Manual Model KM710c Service Manual KM710c Internal Use Only ...
Page 173: ...Note ...
Page 174: ...Note ...