G310 Service Manual
PANTECH
R&D
CONFIDENTIAL
39
6.2.5 Hook Switch not working
1. Check to see if U111.5 pin is 2.8V : CP129
2. Check to see if U111.1 pin is 0V during pressing Hook Switch : CP130
3. Check to see if U111.3 pin is around 0.3V : CP131
NO Check that R109 and R110 cold solder, broken, short to the other PCB pattern or not
If you find out any defect, you replace it
4. Check to see if U111.4 pin is around 0V, when you press Hook Switch : CP132
NO Check that U111 cold solder, broken, short to the other PCB pattern or not
If you find out any defect, you replace it
CP131
CP129
CP132
CP130
CP129
CP130
CP131
CP132
CP127
CP126
