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CHECKING FLOW
Check Battery Voltage
Push power-on key
And check the level change
into high of POWERKEY
Check the voltage of
The LDO outputs at U201
Is the phone power on?
The phone will
Properly operating.
LGE Internal Use Only
START
> 3.35V
YES
YES
YES
YES
NO
Charge or Change Battery
NO
Check the contact of power key
Or dome-switch
NO
Replace U201
VCORE=1.2V, VPMU=1.2V, VDDMS=1.3V
VAUX=2.85V,VMMC=2.85V,
VDD_RF2=2.5V
VDDXO=1.3V, VDDTDC=1.3V, VRF1=1.8V
NO
Replace U201 and Re-download software
Does it work properly?
Replace the main board
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Copyright © 011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
NO
Only for training and service purposes
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