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3-24
ONE POINT REPAIR GUIDE
8. NO POWER ON (STANDBY LED IS BLINKING)
It doesn’t turn on, and blinks standby LED(Red).
8-1. AMP FETs
8-1-1. Solution
Please check and replace Q700 ~ Q705, Q708, Q709, Q714, Q716, Q719 ~ Q724 on MAIN board.
8-1-2. How to troubleshoot (Countermeasure)
1) This symptom occurs, when DC protection is detected. Main reasons are like below.
- When Some of AMP FETs dead.
8-1-3. Service hint (Any picture / Remark)
AMP FET : IRF6775
Notice for FET service
- In case of RF6775, Metal case, FET Drain,
has electric potential. So be careful when you
deal with it.
* You can see FET after removing heatsink.
* Notice for Service
Before repair Main Assy, you need to discharge SMPS.
After then, open the connector.
You should try to change both of +/- FET and Driver IC as a pair.
Summary of Contents for CM9730
Page 11: ...MEMO 1 10 ...
Page 13: ...MEMO 2 2 ...
Page 59: ...MEMO 3 42 ...
Page 83: ...3 89 3 90 2 MAIN P C BOARD TOP VIEW ...
Page 84: ...3 91 3 92 MAIN P C BOARD BOTTOM VIEW ...
Page 85: ...3 93 3 94 3 VFD P C BOARD ...
Page 86: ...3 95 3 96 4 MAIN VOLUME P C BOARD 5 MIC P C BOARD ...
Page 87: ...3 97 3 98 6 JOG P C BOARD 7 USB P C BOARD 8 TUNER P C BOARD ...
Page 89: ...3 101 3 102 MEMO MEMO ...