4. TROUBLE SHOOTING
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Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
START
Change or charging the Battery
No
Yes
Change the Main board
Check the SUB FPCB
No
Yes
Change the Main board
No
Yes
Check the X-tal
No
Yes
Battery voltage higher than 3.4V?
Press TP1(PWR_ON_KEY VA102)
high to low
Is clock ok?
X5000 : 32.768KHz
Yes
Change SUB FPCB
No
Power key is
Damaged?
TP2 +1V2_TPS_VRTC(C5014) ,
TP3 +1V2_TPS_VCORE (C5023),
TP4 +1V8_TPS_AVDD_OSC (C5015),
TP5 AP_32K_CLK_IN (R5015),
TP6 +1V2_TPS_VDDR (C5028),
TP7 +3V3_TPS_VUSB (C5010),
TP8 +1V8_TPS_VIO (C5027),
GPS_32K_CLK_IN,
TP9 WLAN_32K_CLK_IN (R5036),
TP10 +1V2_TPS_VPLL (C5008),
TP11 +1V0_TPS_VDDRHS (C5009),
TP12 +2V85_TPS_VMEM (C5011),
TP13 AP_VBUS_DET (R5030),
TP14 AP_SYS_RESET_N (R5008),
Power up?