Usim Card Detection Failure - Huawei U9500 Maintenance Manual

U9500 Maintenance Guide
Figure 9-25 Handling process for the microSD card detection failure

9.2.9 USIM Card Detection Failure

Cause
Figure 9-26 and Figure 9-27 show the components, damage on which can cause the USIM
card detection failure.
Issue 1.2 (2012-6-30)
microSD card detection failure
Check whether the
microSD card holder
appearance is normal.
Y
Check whether the power supply
pin VDD-MMC1 of the microSD
card is normal.
Y
Check whether the
microSD_DETECT circuit is
connected and whether signal cables
are in good condition.
Y
Resolder or replace U301
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9 Troubleshooting
N
Resolder or replace the
card holder J2101.
N
Resolder or replace
U901.
N
Resolder or replace
the signal-channel
components.
56