Huawei Y511-U030 - Page 43

XXXX The basic version Repair ManualV1.0
internal public
2013-09-25
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第 43 页，共 79 页
 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.
Not Charging
replacement of
charging line is OK
Check the charging
port IO whether there
is a 5V input voltage
Check U303, U305
soldering and ontology
is good
PMU chip is welded
again
PCB bad
END
Re welding IO port
Rebuild or replace
the U303, U305
Y
Y
N
N
N
Y
Y
N