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avkhid

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Aug 8, 2024
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Hello Friends,
Need your help to fix the amplifier or guide me.
I recently bought a Yamaha AS-501 amplifier from a shop which was being sold for spares/repairs. The symptoms were that the power light was flashing orange. I read the forum and Yamaha service manual about resetting protection circuits and succeeded in doing so. Lovely sounding amplifier. All was fine for few weeks and then the disaster hit. There was a power trip at home while the amp was playing and without powering off the amp, I turned the power to the house back On. That is when I smelt smoke from the amplifier. Upon closely inspecting the amplifier, I saw that the smoke was from the IC (IC402 I think) on the Tuner card. And since then when I power On the Amp, it does not work and the Power light stays dim Orange (steady state). I was thinking of the following options and need your help here -

Option 1: I only used the CD input on the amplifier (as I liked the sound) and will be happy if in some ways I can bypass the fried Tuner Card, Turn back the Amplifier On and start using CD input. I tried this by removing the Tuner Card and tried resetting the protection circuit. But no success. Is there any way to achieve what I am trying to do? I am audio enthusiast but don't want to spend a lot and don't mind doing things myself (got some electrical and electronics equipment If I need to get under the hood)

Option 2: If Option 1 cannot be achieved, I may think of buying the replacement Tuner Card/PCB. Any info on how much this will cost or where to buy it from?

Option 3: Are there any other alternatives to get the amplifier back on its feet?

Happy to share the photos of the internals/burnt board if it helps.
 
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