Sim Part - Samsung SGH-ZV40 Service Manual

Flow Chart of Troubleshooting

9-3. SIM Part

Phone can't access SIM Card
C1(VREG_USIM_3V) = "H"?
After Power ON,
pinC3(USIM_CLK) in a few
After SIM card insert,
CN500 pinC2(USIM_RST) =
Check the SIM Card
Yes
CN500 pin
Yes
Check CN500
second
Yes
"H"?
Yes
Yes
END
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No
No
No
9-4
Check the SIM Power
Check the OSC500
Replace PBA