Display Failure - Huawei E5331 Maintenance Manual
Maintenance manual basic version
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- Quick start manual (20 pages) ,
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9.6 Display Failure
Reference Figure 9-6
2012-4-21
E5331 Maintenance Manual Basic Version V1.0
Display Failure
Measure whether
power supply voltage of the LED
is normal?
Y
Replace the LED, check
whether it is normal?
N
Measure whether
the
R3908/R3909/R3914/R3910/R3911/R391
5/Q3902/Q3903/Q3904/Q3905
are normal?
Y
Replace the U3101
Huawei confidential. No spreading without permission.
Check the
battery
N
/Replace the
U3801
Y
End
Replace the
faulty
N
components
Internal
Page 40 of 57
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