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Level
3
Repair
8-13
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8-3-4.
Sim Part
Check the
SIM
300
pin
1(
C325)
】
2.85V
Phone can't access SIM Card
Resolder the UCP200 using heatgun.
Check the SIM Card is demaged.
END
No
Yes
Yes
Yes
No
Resolder or Replace SIM300 connector.
(
Because of not soldering well)
After Power ON,
Check the SIM_CLK signal is on.
(
TP
:
C303)
(
method
:
wire the pin
3(
C303)
and check its waveform using an
oscilloscope)
Yes
No
Change the PBA.
After SIM card insert,
Check the SIM
300
pin2
(
R333,C304: SIM_RST)
】
2.85V?
(
method
:
wir
e
the pin
2
and
check its waveform using an
oscilloscope)
Yes
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