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Sansui AU5500

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maxProview

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Hello,
I am starting the rescue of a Sansui Au 5500.
I need help because I don't have a lot of experience !

I bought the amplifier from a grandpa. It was overhauled in 2019. Full recapping + adjustment. Today it is not very well ! It is extremely noisy ! The settings seem to have completely deviated. I noticed that the adjustment trimers were not replaced. I will do it.

I'm worried because reading the left channel bias gives me 39V! 0.4V for the right.
 
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Robisme said:
Where are you taking these measurements from?

Rob
Click to expand...
Hello Rob, thans for your interest !

I understood my mistake ! Previously I was working on an amp where you have to measure voltage to adjust the bias I read the procedure for this one too quickly ...

The problems I have left with this amplifier is that it is not stable at startup, it takes a few seconds to return to 0 on one channel. He also snores a lot...

DC 0V L is high 25mV right better fluctuate bellow 10mV
 

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