3-17
ONE POINT REPAIR GUIDE
AMP FET : IRF6775
< MAIN board top view >
7. NO POWER ON (STANDBY LED IS BLINKING)
It doesn’t turn on, and blinks standby LED (RED).
7-1. AMP FETs
7-1-1. Solution
Replace AMP FET on MAIN board.
7-1-2. How to troubleshoot (Countermeasure)
1) This symptom occurs, when DC protection is detected. MAIN reasons are like below.
- When some of AMP FETs dead.
7-1-3. Service hint (Any picture/ Remark)
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.
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