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Crazy fast speed on my Dual 714 Q turntable

Just got it given to me and the plater spins out of control fast. the pitch control makes no difference.

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  • mar010282
    mar010282 Dec 08, 2013

    definately not the problem. If that were the problem the platter would eventually spin at a constant speed. Mine keeps rotating so fast that the needle just slides across the record. it starts at a normal speed and just keeps going faster and faster until the writing on the records is just a colored line. must be a servo problem i think. But i'm no electrcian.

  • Audio Service Clinic Dec 08, 2013

    My appologies. You have a Direct Drive turntable. They use a circuit known as a Phase Locked Loop, which attempts to lock the speed. Could be one of the components in that circuit. Unfortunately, the Direct Drive motor itself contains all the speed circuitry and is generally considered a non repairable component. The entire motor is replaced as a unit. That's not to say that it couldn't be repaired, but it is generally not. You might try to clean the pich controls with LPS 2, as they are part of this circuit and if they get noisey(dirty) they can effect this circuit as well. If you need anything else, please contact me at my website, audioserviceclinic.com. Thank you.

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Posted on May 12, 2013

Testimonial: "Thanks for the link, but it has no trouble shooting for my problem. maybe if i open it up i can see the exact problem. The manual did give me a good overview of how to locate the areas that the problem may occur but no definitive answers. Thanks again!!"

  • Audio Service Clinic Dec 08, 2013

    You have a belt driven turntable. If you look at the motor pulley, you'll see that it has an upper and lower guide. That is where the belt is supposed to ride. My guess is that the belt is about have way over the top ridge. Move the belt down and rotate the patter by hand a few times, to be sure the belt stays where it belongs. For more information, please visit my website at audioserviceclinic.com. Thank you.

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Audio Service Clinic You have a belt driven turntable. If you look at the motor pulley, you'll see that it has an upper and lower guide. That is where the belt is supposed to ride. My guess is that the belt is about have way over the top ridge. Move the belt down and rotate the patter by hand a few times, to be sure the belt stays where it belongs. For more information, please visit my website at audioserviceclinic.com. Thank you.

Posted on Dec 08, 2013

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