Only For Training And Service Purposes - LG KG290 Service Manual

CHECKING FLOW
START
Does the SIM cards
supports 3V ?
YES
Voltage at pin1 of
J202 is 2.85V?
YES
Change the SIM Card
And try again.
Does it work
Properly?
YES
Change SIM Card
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Only for training and service purposes

NO
Change the SIM Card. Our phone
supports only 3V SIM card.
NO Voltage output
of VSIM LDO
Is 2.85V?
YES
Replace J202
NO Redownload SW.
Does it work
Properly?
YES
SIM Card will be detected.
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4. TROUBLE SHOOTING
YES
Resolder J202
NO
Change the main board
LGE Internal Use Only