Model GC318
L3 Service Manual
4. Change the CPU
8
）
Vibrator
1. Check the soldering between Vibrator and PCBA is properly or not, if soldering has no issue, using the digital
power supply at 2 Volt position to check whether the Vibrator working fine or not .If Vibrator cannot work, then
change another one; if the vibrator working fine, it proves that the control signal has not reached at the
vibrator, you have to check the component on the trace leads to Vibrator (R203 and C234).
2. Replace the CPU or re-soldering CPU.
9
）
Network related issues/Sims related Issues
a
）
GSM SIM
：
SIM card itself analyzing
