U8950 Maintenance Guide V1.0
10 Principles and Failure Analysis
2012-10-22
Huawei Proprietary and Confidential
58
Charging failure
Does the charge
function properly?
Replace the
charger.
N
Check whether the USB
connector J103 is
poorly soldered?
Y
Y
Re-solder
J103.
N
Check whether C231
bears voltages.
Check whether
VPH_PWR voltages
exist.
N
Y
Check F101 and LB101.
N
Replace
Q201.
Is the battery
damaged?
Y
Replace J902.
Y
End
N
Check whether pin 3 of
Q201 outputs signals.
Replace
U901.
N
Y
Check whether J902 is
damaged.
N
Y
Replace the
battery.
