Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
Perhaps these could help you - contact them and find out:
If they can't, or aren't near enough, let me know, and I will do further searches for one nearer you, or one that can take on the case.
(I think it's possible that the audio amplifier in your Technics organ has had a partial failure ... but that's not too certain at this point.)