Model GC318
L3 Service Manual
Steps: Call drop, draining check procedure
Call drop, drain and Leakage usually phenomenon are phone heat, short stand by. Ampere meter testing will
show High current, leakage.
If don’t fix this defect, it will damage cell phone and battery
1, first check whether has soldering caused short circuit
2, call drop usually stand by calling, searching net drop
，
it is leading by RF circuit
，
RF PA defect
；
or battery
Protector board problem
，
lack of power
3, consumption, leakage can check the different power supplier pin resistance rate if un-normal resistance break
The power and load testing separately abnormal resistance rate is defection, change it.
4, Check the RF Section Shorting in PA
RF Section CDMA: Qualcomm Chipset
RF Section GSM: MTK Chipset
