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4. TROUBLE SHOOTING
z KEY Backlight LED Trouble
NO
Is the Voltage level VBAT
3.35 ~4.2?
Backlight will work properly
START
YES
Check the soldering of R600,
R601 or Replace LEDs not
working
NO
Are all LEDs
TP1_F, TP2_F( Sub PCB)
TP1, TP2 (Key PCB)
Working?
Charge Battery
YES
Main key is
Working?
YES
Check the condition of doom
sheet. If problem, Replace the
doom sheet
NO
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