Sim Part - Samsung SGH-E740S Service Manual

Flow Chart of Troubleshooting

9-4. Sim Part

Phone can't access SIM Card
T/SIM500 pin 11 or 14
(SIM_VCC) = "H"
After Power ON,
Check SIMCLK Signal on
pin15 of T/SIM500
in a few second
After SIM card insert,
T/SIM500 pin 13(SIMRST)
Check the SIM Card
Yes
Yes
Yes
= "H"
Yes
Yes
END
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No
No
No
9-8
Resolder or replace U403
Check the Clock
Replace PBA