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4. TROUBLE SHOOTING
Checking Flow
Does the SIM cards
supports 3V ?
YES
Voltage at pin1 of
J100 is 2.85V?
YES
Change the SIM Card
And try again.
Does it work
Properly?
YES
Change SIM Card
START
NO
Change the SIM Card. Our phone
NO
NO
SIM Card will be detected.
supports only 3V SIM card.
Voltage output
YES
of VSIM LDO
Is 2.85V?
YES
Replace J100
Redownload SW.
NO
Does it work
Properly?
YES
- 64 -
Resolder J100
Change the main board
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