Huawei Y511-U030 Repair Manual page 43

XXXX The basic version Repair Manual

Fault analysis and treatment process:
Fault phenomenon: fault mobile phone cannot charge usually have two types: one is
connected to the mobile phone charger, mobile phone no response; another is a mobile phone
while charging display, but not to charge the battery. The fault plane is not charging, please I/O
interface detection, see if there are any obvious damage. Please refer to the specific repair
process is as follows.
Y
Y
END
2013-09-25
V1.0
Not Charging
replacement of
charging line is OK
N
Check the charging
port IO whether there
is a 5V input voltage
Y
Check U303, U305
soldering and ontology
is good
Y
PMU chip is welded
again
N
PCB bad
华为机密，未经许可不得扩散
Re welding IO port
N
Rebuild or replace
the U303, U305
N
internal public
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