Only For Training And Service Purposes - LG KP235 Service Manual

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
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Only for training and service purposes

NO
Change the SIM Card.
This phone supports 3V or 1.8V SIM card.
Voltage output
NO
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