Sim Part - Samsung SGH-A800 Service Manual

5-4 Sim Part

5-7
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Phone can't access SIM card
Yes
U101 pin 6 = 3 V ?
Yes
U101 pin 5 = "H" ?
Yes
U101 pin 2, 3 = 3 V ?
Yes
CN100 pin 1, 5 = 3 V ?
Yes
After Power ON,
Check SIMCLK Signal on CN100 pin 3
in a few second
Yes
After SIM card insert,
CN100 pin 2 = "H(SIMRST) ?
Yes
END
manuals search engine
No
Resolder R101
No
Replace the PBA
No
Replace U101
No
Resoldering CN100
and check open connection
from U101 to CN100
No
Replace PBA
No
Replace the PBA
Flow chart of Troubleshooting and Circuit Diagram