Thank you very much Filip.

I was almost sure about that, but just  - 'livrem og seler'😊

I might replace the trimpots after alignment. Out - find how many Ohms, and probably make two fixed resistors i parallel do the same. In a Beomaster 9000 I have seen a similar trimpotentiometer perform erratic after af few decades, resulting in a pretty hot output stage.

 

Location: Denmark