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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
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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 pin1
of J200 2.85V or 1.8V?
NO
Change the U101
NO
YES
Resolder J200
YES
Voltage output
of VSIM LDO
Is 2.85V?
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.
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