Light Sensor Failure - Huawei U9500 Maintenance Manual

U9500 Maintenance Guide
Figure 9-30 Handling process for the TP failure

9.2.11 Light Sensor Failure

Cause
Figure 9-31 and Figure 9-32 show the possible reasons that can cause the light sensor failure.
Figure 9-31 Possible reason
Issue 1.2 (2012-6-30)
TP failure
Does the phone resume
its functions after having
the original TP module
group replaced?
N
Check whether the TP
power supply is normal.
Y
Check whether signals on the
RST, INT, and I2C are normal.
Y
Resolder or replace J2201.
The component
is smudged
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Y
Replace the TP
module group.
N
Resolder or replace
U901.
Resolder or replace
N
the signal channel
components.
9 Troubleshooting
60