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3-6
ONE POINT REPAIR GUIDE
5. AUDIO OUTPUT IS SMALL OR NO AUDIO OUTPUT
Audio signal output is small or not. when you power on the Middle Power Mini System.
5-1. AMP IC (IC700~IC705)
5-1-1. Solution
Replace IC700~IC705 on MAIN board.
5-1-2. 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~IC705 on your eyes.
3) Check the audio signal output check (pin13 of IC700~IC705).
First, Check the PWM Data input (pin3 of IC700~IC705)
4) If the audio signal output has no output, try to change IC which has no output.
5) Lastly, check Speaker Terminal (TM700).
5-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
IC700~IC705
IC700~IC705
Summary of Contents for CM9750
Page 15: ...2 2 ...
Page 19: ...4 SPEAKER SECTION A60L A60R ...
Page 75: ...3 71 3 72 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD TOP VIEW ...
Page 77: ...3 75 3 76 2 MAIN P C BOARD TOP VIEW ...
Page 78: ...3 77 3 78 MAIN P C BOARD BOTTOM VIEW ...
Page 79: ...3 79 3 80 3 FRONT P C BOARD TOP VIEW ...
Page 80: ...3 81 3 82 FRONT P C BOARD BOTTOM VIEW ...
Page 81: ...3 83 3 84 4 FRONT_CTRL P C BOARD TOP VIEW BOTTOM VIEW ...