User Guide

5-7 Flow chart of Troubleshooting and Circuit Diagram

5-4 Sim Part

Phone can't access SIM card

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U101 pin 6 = 3 V ? Resolder R101

END

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U101 pin 5 = "H" ?

U101 pin 2, 3 = 3 V ?

Replace the PBA

Replace U101

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CN100 pin 1, 5 = 3 V ?

Resoldering CN100

and check open connection

from U101 to CN100

After Power ON,

Check SIMCLK Signal on CN100 pin 3

in a few second

After SIM card insert,

CN100 pin 2 = "H(SIMRST) ?

Replace PBA

Replace the PBA

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