Huawei E5331 - Page 32

E5331 Maintenance Manual Basic Version V1.0
Internal
2012-4-21
Huawei confidential. No spreading without permission.
Page 32 of 57
High Current
Remove the
U3801, then check if it is
not short?
Replace the
U3801
N
Y
Measure J3801 pin3
whether is short？
N
Remove the
L3601, then check if it is
not short?
Replace the
U401&U501
N
Y
Remove the
U3501, then check if it is not
short?
Replace the
U3501
N
Y
Remove the
U3601, then check if it is not
short?
Replace the
U3601
N
Y
Replace the U4001
Remove the U801, then check
if it is not short?
Replace the
U801
N
Y
Y
Replace the
C3811,C3810
&C3806