Huawei E5331 - Sim Card Failure

E5331 Maintenance Manual Basic Version V1.0
Internal
2012-4-21
Huawei confidential. No spreading without permission.
Page 37 of 57
9.4 SIM Card Failure
Reference Figure 9-4
SIM card failure
Check whether
Socket is in good
condition soldering？
Y
Re-solder/
replace socket
N
Measure whether the
C3416/C3513/C3702/C3719/R3701
R3707/RV3705/RV3706/RV3707/RV3
708 Are normal?
Replace the
faulty
components
Replace the U3101
Y
N
Insert a normal SIM card,
Measure whether the supply voltage of
the SIM card is normal?
Replace the
U3501
Y
N