Only For Training And Service Purposes - LG KF305 Service Manual

4. TROUBLE SHOOTING
CHECKING FLOW
START
Does the SIM card
support 3V or 1.8V ?
YES
Is Voltage at the TP1 2.85V or 1.8V?
YES
Change the SIM Card
And try again.
Does it work
Properly?
YES
SIM card is properly working
LGE Internal Use Only
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 Re-download SW.
Does it work
Properly?
YES
SIM card is properly working.
- 96 -
NO
Change the U100
NO
Change the main board
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Only for training and service purposes