Audio Output Is Small Or No Audio Output - LG CM9730 Service Manual

7. AUDIO OUTPUT IS SMALL OR NO AUDIO OUTPUT

Audio signal output is small or not. when you power on the Middle Power Mini
System.
7-1. IC700 ~ IC706 & IC708
7-1-1. Solution
Please check and replace IC700 ~ IC706 & IC708 on MAIN board.
7-1-2. How to troubleshoot (Countermeasure)
1) Please check if this system is on bass blast mode.
C, RL and RR make sound only on bass blast mode.
2) Check the IC700 ~ IC706 & IC708 on your eyes.
3) Check the audio signal output check (Pin13 of IC700 ~ IC706 & IC708).
First, check the PWM Data input (Pin3 pin of IC700 ~ IC706 & IC708).
4) If the audio signal output has no output, try to change IC which has no output.
5) Lastly, check Speaker Terminal (CN702, CN703).
7-1-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
< MAIN board top view >
3-23