Table of Contents
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CHECKING FLOW
START
Does the SIM card
support 3V or 1.8V ?
YES
Is Voltage at the pin1, pin6
of J300 2.85V or 1.8V?
YES
Change the SIM Card
And try again.
Does it work
Properly?
YES
SIM card is properly working
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
NO
Change the SIM Card.
This phone supports 3V or 1.8V SIM card.
NO
Voltage output
of VSIM LDO
Is 2.85V?
YES
Resolder J300
NO
Redownload SW.
Does it work
Properly?
YES
SIM card is properly working.
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4. TROUBLE SHOOTING
NO
Change the U104
NO
Change the main board
LGE Internal Use Only
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