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Sony muteki PCB

Standalone Sony Muteki amplifier as an additional passive subwoofer amp. HT-DDW5500 DDW7500 DDW8500 Recently my AV receiver Sony Muteki STR-KM7500 stopped working. It wasn’t worth fixing it so I bought a new one. New Sony models do not have subwoofer amp, and there was no system control for the amplifier. TA-KMSW500 will not power without master amp, so this is a solution how I fixed it. The power supply has to be started with master amp, until that doesn’t happen mains relay is off and the TA-KMSW500 doesn’t have any power that can be used. Simple solution is to add a link and to bridge the mains relay.

On the picture is marked with red where to insert the link (removing the  board is not hard). This is a simple solution but then the amp is ON all the time.

So I used different solutions and for that you even don't need to open the amp.

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