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Level 3 Repair
8-3-4. Sim Part
Phone can't access SIM Card
Yes
No
Check the
Resolder the UCP200 using heatgun.
SIM300 pin 1(C325) 】 2.85V
Yes
After Power ON,
Check the SIM_CLK signal is on.
No
Resolder or Replace SIM300 connector.
(TP : C303)
(method : wire the pin 3(C303)
(Because of not soldering well)
and check its waveform using an
oscilloscope)
Yes
No
After SIM card insert,
Check the SIM300
pin2(R333,C304: SIM_RST) 】
2.85V?
Change the PBA.
(method : wire the pin 2 and
check its waveform using an
oscilloscope)
Yes
Check the SIM Card is demaged.
Yes
END
8-13
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