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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.8 Keypad backlight Trouble
start
Signal MAIN_KEY_EN
Is LOW?
Click TP1
END
YES
YES
NO
NO
NO
Change LD301, LD302
And check again.
Work well?
YES
Check soldering of LD301
LD302, R316, R319
Resolder LD301
LD302, R316, R319
Change the Main Board
Signal MAIN_KEY_LED
Is LOW?
Click TP2
Change the Main Board
Backlight is work well?
YES
NO
start
END
Resolder LD301
LD302, R316, R319
Change the Main Board
Change the Main Board
Содержание KP275
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