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Crash
1.6.2
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
2013-10-18
YU220 service manualV1.0
Automatic
shutdown
FPC is slight even
tin soldering PAD
N
FPC solder pads on
the PCB slight
bridging
N
The battery voltage is
above 3.6V
Ｙ
Intermediate between
the battery and
ground PIN whether
the impedance at
room temperature is
10K
Y
Main voltage is OK
N
Replace
PMIC or
CPU
Huawei secrets, no dispersion without permission
Y
End
Y
End
Charge the
battery or
Ｎ
replace the
battery
Replace
N
battery
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