Maintenance Records During Verification; Maintenance Records On Each Stage - Huawei U8950 Maintenance Manual

U8950 Maintenance Guide V1.0
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Maintenance Records During Verification

9.1 Maintenance Records on Each Stage

Stage Station of Fault
V3 Board upgrade
V3 Loading
V3 Loading
V3 CT
V3 MMI
V3 MMI
V3 MMI
2012-10-22
Faulty Item Symptom
The upgrade The data was lost.
failed at 4%.
Poor loading The flash chip was
poorly soldered.
Poor loading The data was lost.
MMI06A The vibrator was
vibrator faulty.
malfunction
MMI06A The FPC and BTB
vibrator connector were not
malfunction fit in place.
MMI06A The FPC BTB
vibrator connecting to the
malfunction antenna board was
bridged, resulting in
the grounding of
VIB_DRV_N. The
vibrator started
vibrating once the
battery was loaded.
MMI05C The chip on the
touchscreen touchscreen was
malfunction damaged.
Huawei Proprietary and Confidential
9 Maintenance Records During Verification
Solution
The board was formatted and
reloaded and the test then passed.
The software was reloaded and no
interface was detected. The test
passed after the flash chip was
heated and re-soldered.
The board was formatted and
reloaded and the test then passed.
The faulty product was retained, as
required by the R&D department, for
analysis by the vendor.
The BTB connector was refitted.
The vibrator was re-soldered.
The touchscreen was replaced.
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