U8950 Maintenance Guide V1.0
9 Maintenance Records During Verification
2012-10-22
Huawei Proprietary and Confidential
36
Stage
Station of Fault
Faulty Item
Symptom
Solution
V4
MMI
MMI06E
headset
malfunction
The tester inserted
the headset when
testing the secondary
microphone
loopback, resulting a
mis-test.
After confirmation by the tester, the
headset was inserted on the correct
stage and the test then passed.
V4
MMI
MMI06C
receiver
malfunction
The receiver FPC
was faulty. An open
circuit occurred at
the contact of the pin
and BTB connector.
After confirmation by the R&D
department, the FPC was replaced
and the test then passed.
V4
MMI
MMI06C
receiver
malfunction
The receiver FPC
was faulty.
The FPC was replaced and the test
then passed.
V4
MMI
MMI06B
speaker
malfunction
Two speakers were
missed during the
pre-assembling,
resulting in the
failure of speaker
test.
After confirmation by the product
line and PE, the speakers were
installed and the test then passed.
V4
MMI
MMI04D
proximity
light
malfunction
The test was stuck in
the state of
proximity for long. It
might be caused by
poor transparency
due to dirty
protective film on
the touchscreen.
The touchscreen protective film was
removed and the test then passed.
V4
MMI
MMI03A key
malfunction
The structural design
flaw caused
separation of the key
shrapnel and
functional contact
point. The clip on
the left did not work
well and lost effect
after disassembly for
once.
No contact trace was found on the
key shrapnel's pin after the
disassembly. After confirmation by
the R&D, hardware, and structure
departments, the PCBA was
assembled and secured again and the
test then passed.
V4
MMI
MMI03A key
malfunction
The functional
contact point of the
volume down key
was smudged.
The functional contact point was
cleaned using alcohol and the test
then passed.
