Huawei YU220, Service Manual

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YU220 service manualV1.0
2013-10-18
Huawei secrets, no dispersion without permission
Automatic
shutdown
FPC is slight even
tin soldering PAD
End
FPC solder pads on
the PCB slight
bridging
End
The battery voltage is
above 3.6V
Y
N
Y
N
Ｎ
Ｙ
Intermediate between
the battery and
ground PIN whether
the impedance at
room temperature is
10K
Replace
battery
N
Y
Charge the
battery or
replace the
battery
N
Main voltage is OK
Replace
PMIC or
CPU
1.6.2 Crash
The phenomenon of death is for a cell phone stuck in boot screen or
stay in one of the user's screen, the phone cannot use, the touch
panel cannot t slide, and some need to disconnect the battery to reboot the
only solution, and some cannot. Mainly in the following analysis of the reasons
1) Whether CTP has already null and void, lead to user take for mobile