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Main board for Denon DP59 deck

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What a nice deck, sorry to hear it doesn't work!

There might be the service manual available at vinylengine.com, in case you try to fix it. What is the problem exactly with your turntable? If it simply does not start, that might be possible to repair, but real failures like dead motors (like arm lifters) are impossible to fix without a 2nd deck to cannibalize parts from.

As last option, before throwing it away shoot me a pm, I might take it and refund you the postage.

Good luck! Hannes
 
is the electrolytic caps go bad...

While I can recommend that for any some decade old gear, I haven't ever encountered a device that really didn't work only due to the caps gone bad. The gear typically works a bit worse, but it works.

Any case, that's something to try.

Please bear in mind that the old tables usually come with paper boards and traces lift very fast with these boards. Check for that and be prepared that you might fix lifted traces with a piece of wire.

then it starts to accelerate and doesn´t look back til you switch off.

It's strange that it doesn't stay locked. So it is not the 'crude' unlocked speed regulation circuit, but somehow the PLL is not happy. You can check the electrolytic caps around the PLL (get the service manual first).

Hannes
 
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