LG LG-D618 - Page 114

3. TROUBLE SHOOTING
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Only for training and service purposes
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START
Check battery connector &
+VPWR line lter(CN9100,FL9100)
Press PWR Key TP1: R10002
Come high to low?
Battery voltage
higher than 3.3V?
Check Main Clock TP2:X4100 (19.2MHz)
Check BBCLK TP3:R4110
Check PM8226’s VREG_S1 is high
(0.7V) TP4: C4139
PON_RESET_N high?
TP5:TP4103
PS_HOLD (TP6:R4104)
Check Key FPCB
Change or charging the Battery
Check X4100
Check U4100(PM8226)
Check U4100(PM8226)
Check U4100(PM8226)
Check U4100(PM8226)
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes