4. TROUBLE SHOOTING
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LGE Internal Use Only
Copyright © 01 LG Electronics. Inc. All right reserved.
Only for training and service purposes
START
Check Battery Voltage
> 3.35V
Charge or Change Battery
No
Yes
The phone will
Properly operating.
Does it work properly?
Replace the main board
No
Is the phone power on?
Replace U01 and
Re-download software
No
Yes
Yes
Push power-on key
And check the level change
into high of POWERKEY
Yes
Check the contact of power key
Or dome-switch
No
Check the voltage of
The LDO outputs at U01
Replace U01
No
VCORE(TP03)=1.V,
VPMU(TP0)=1.V,
VDDMS(TP10)=1.3V,
VPA(TP04)=.85V,
VMMC_V85(TP01)=.85V,
VDDRF(TP05)=.5V
VDDXO(TP09)=1.3V,
VDDTDC(TP08)=1.3V,
VRF1(TP06)=1.8V