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
Does the SIM card
support 3V or 1.8V ?
Change the SIM Card.
This phone supports 3V or 1.8V SIM card.
No
SIM card is properly working
Yes
Yes
Is Voltage at the pin#1
of S301 .85V or 1.8V?
Yes
Resolder S301
No
Change the SIM Card
And try again.
Does it work
Properly?
Change the U10
No
Voltage output
of VSIM LDO (TP01)
Is .85V?
redownload SW.
Does it work
Properly?
No
SIM card is properly working.
Yes
Change the main board
No