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i have a technics SA -TX1000 and i cannot find the issue or a manual for the device online

Hi, Did you mean a Technics SA-1000? If so, here’s a link to a website which has a link to the service manual. Unfortunately you have to create an account with them to be able to download it. As you haven’t stated what the the problem is with the receiver it is a bit hard to help you any further at this stage.