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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
LGE Internal Use Only
START
Does the SIM card
support 3V or 1.8V ?
NO
Change the SIM Card.
This phone supports 3V or 1.8V SIM card.
YES
Is Voltage at the pin C6
of CN103 2.85V ?
NO
Change the U103
NO
YES
Resolder CN103, L107
YES
Change the SIM Card
And try again.
Does it work
Properly?
YES
SIM card is properly working
Redownload SW.
Does it work
Properly?
NO
Change the main board
NO
YES
SIM card is properly working.
CHECKING FLOW
TP1 is
2.85V?