U8950 Maintenance Guide V1.0
9 Maintenance Records During Verification
2012-10-22
Huawei Proprietary and Confidential
40
Stage
Station of Fault
Faulty Item
Symptom
Solution
VN1
MMI
MMI06F
abnormal
sound
The vibrator was
faulty.
The abnormal sound persisted when
the vibrator was powered directly.
The antenna board was replaced and
the test then passed. It was
confirmed that the incoming material
of the vibrator was faulty.
VN1
MMI2
MMI06F
abnormal
sound
The test headset was
in poor contact.
The headset was replaced and the
test then passed.
VN1
MMI
MMI06C
receiver
malfunction
The sound chamber
under the receiver
was blocked by a lay
of adhesive paper,
resulting in low
volume.
The adhesive paper was removed
and the volume became normal.
VN1
MMI
MMI06C
receiver
malfunction
The receiver was
blocked by the
protective film.
The protective film was adjusted and
the volume became normal.
VN1
MMI
MMI06C
receiver
malfunction
The receiver contact
shrapnel was
inversely installed.
The receiver was re-installed.
VN1
MMI
MMI06B
speaker
malfunction
The speaker was
reversely installed
during the
pre-processing of the
rear cover.
The speaker was re-installed.
VN1
MMI
MMI06B
speaker
malfunction
The foam object
from the white
package was
introduced during
the pre-installation.
The foam object from the white
package was removed and the test
then passed.
VN1
MMI
MMI06B
speaker
malfunction
The incoming
material of the main
FPC was faulty.
When the FPC was replaced, the test
passed. The problem was retained as
it occurred.
VN1
MMI
MMI06A
vibrator
malfunction
The incoming
material of the
vibrator was faulty.
The faulty product was retained for
further analysis by the R&D
department.
VN1
MMI
MMI06A
vibrator
malfunction
The incoming
material of the
vibrator was faulty.
The abnormal sound persisted when
the vibrator was powered directly.
The board was replaced and the test
then passed. It was confirmed that
the incoming material of the vibrator
was faulty.
