Model GC318
L3 Service Manual
3. analog switch and so on
First method: Touch heat under High Current Through touch the heat components finding problem, after
charging in short time.
Second Method: Excluding method
If can’t find problem
，
using excluding method. Take off components one by
one: Proceeding
：
take off LCD, keypad board, torch
—> charging protects IC --> audio -->MT6260A
VBAT Connector
a) Press power key High Current
This defect cause of VDD, VCC supply power Shorting Problem
1. First take off connected components
2. Such as LCD and CAMERA
3. Then judge is CDMA module problem or GSM module problem
4. CDMA module problem judgment
5. CDMA module power on big electricity is usually from QSC1110 chipset and FLASH chipset
，
Judge from which chipset is hot
6. GSM module power on big electricity
，
usually problem is MT6260 burn down
7. Touch CPU, FM chipset, sensor whether is hot judging problem
LCD Soldering Points
Camera Soldering Points
