Huawei YU220 Service Manual page 29

problem：
1) Start up , FPC'PAD welding is slight short circuit link tin
2) Start up, pad on the FPC welded PCB whether slight short circuit link tin
3) Judge cell voltage whether above than 3.6V
4) Judge PIN in the middle of battery and among earth impedance
whether 10K in the normal temperature.
5) Above is OK，can check key power supply whether have short circuit
phenomenon, thus can judge whether PMIC and BB chip etc and
affiliated RC device cause.
2013-10-18
YU220 service manualV1.0
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