U8950 Maintenance Guide V1.0
9 Maintenance Records During Verification
2012-10-22
Huawei Proprietary and Confidential
39
Stage
Station of Fault
Faulty Item
Symptom
Solution
VN1
PT
PT: H00001
(no port)
The phone could be
powered on using
the battery but not
through the USB
port. The USB chip
was poorly soldered,
resulting in the port
detection failure.
The USB port was re-soldered.
VN1
MT
MT500033:
GPS TEST
FAIL
The test equipment
was faulty.
The test equipment was
re-commissioned.
VN1
MT
MT500001:
open com port
fail
The USB interface
on the main PCBA
was loose. Two pins
were poorly
soldered, resulting in
the startup failure
through the USB
port.
The USB interface was re-soldered
and the test then passed.
VN1
MT
MT500001
(power on)
The barcode format
was incorrect in the
property settings.
The barcode format was reset and
the test then passed.
VN1
MT
MT 568214
The test value was a
critical one.
The test position was changed and
the test then passed.
VN1
MMI
MMI09D
U4401 was poorly
soldered.
The NFC_TX signal could not be
detected using an oscillator and
remained undetectable after U4401
was re-soldered. It was preliminarily
determined that the NFC_TX signal
was grounded.
VN1
MMI
MMI07B
Bluetooth
malfunction
A mis-test occurred.
The test was performed again and
Bluetooth devices were found.
VN1
MMI
MMI07A FM
malfunction
A mis-test occurred.
No more failure
occurred during the
multiple tests.
The test was performed again.
VN1
MMI
MMI06F
abnormal
sound
The pin of the
vibrator on the
antenna board was
poorly soldered.
The abnormal sound persisted when
the vibrator was powered directly.
The antenna board was replaced and
the test then passed. To solve the
problem, re-solder the vibrator.
