LG -600 Series Repair Manual page 29

6. TROUBLE SHOOTING
Failure :
Solution :
After putting audio signal
in MIC
- Any signal Detected?
U900 Pin 5,6 U901 Pin 5,6
- If no signal?
Replace U900, U901.
U901
GSM Handsets Lab.
Microphone voice is not working.
U900
5 6
5 6
5
6
5
6
29
Switch
U901
U900