LG S5000 Service Manual page 79

4. TROUBLE SHOOTING
Checking Flow
START
Does the SIM cards
supports 3V ?
YES
Voltage at pin1 of
J301 is 2.85V?
YES
Change the SIM Card
And try again.
Does it work
Properly?
YES
Change SIM Card
NO
Change the SIM Card. Our phone
supports only 3V SIM card.
NO Voltage output
of VSIM LDO
Is 2.85V?
YES
Replace J301
NO Redownload SW.
Does it work
Properly?
YES
SIM Card will be detected.
- 80 -
YES
Resolder J301
NO
Change the main board