Charging Management Circuits - Huawei U8950 Maintenance Manual

U8950 Maintenance Guide V1.0

10.1.2 Charging Management Circuits

Circuit Block Diagram
2012-10-22
Power-on failure
Connect the phone to the fake
battery and maintenance power
supply, press the power key, and
test the current on the phone.
Excessive
current
Check whether pin
3 of J1501 is
grounded.
N
Check whether the U201
voltage is normal.
Y
Return the phone to the
manufacturer for repair.
Huawei Proprietary and Confidential
10 Principles and Failure Analysis
Y
Check U201 and
J1501.
N
Re-solder or
replace U201.
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