Only For Training And Service Purposes - LG MG370 Service Manual

4. TROUBLE SHOOTING
Checking Flow
START
Does the SIM cards
supports 3V ?
YES
Voltage at pin1 of
J100is 2.85V?
YES
Change the SIM Card
And try again.
Does it work
Properly?
YES
Change SIM Card
LGE Internal Use Only
NO
Change the SIM Card. Our phone
supports only 3V SIM card.
NO
Re-solder J100
NO Re-download SW.
Does it work
Properly?
YES
SIM Card will be detected.
- 52 -
NO
Change the U103
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Only for training and service purposes