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NAD 501 CD player reading error

The laser initiates but the CD won't spin. Isuspect a spindle motor has failed. How do I test or replace spindle motor on this model? How do I match the right clearance from laser? Is miguelovitch website online? I tried to access http://www.miguelovitch.dk but no success. Please help.

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Hi there,
There are a few ways to determine a lazy spindle motor.

  • listen to it. If it sounds like a diesel engine, with regular knocking sounds, bearings are failing... new motor
  • sit the unit on its side, see if it then reads...if bearings are worn, this reduces "slop"in the motor that can contribute jitter to the RF waveform. If it plays then,new motor
  • put a drop of oil into the top bearing of the motor. If it starts to read and run ok, then the bearing may be tight, and need lube, or the oil is acting as a hydraulic bearing. It will not fix the problem if it is a worn bearing. ...new motor.
  • if it spins up slow, and with screeching noise, the bearings are tight. see below for a solution.
Some other solutions.,
  • disconnect the connections to the motor remove a top mounting screw from the motor, and use a straw to flood the motor with crc 2-26, and spin up for 5 minutes one direction at 12 volts, then the other direction. Cleans the armature and brushes.
I always use a steel ruler to measure the height of the platter to the deck of the transport. then set the spindle height for the new motor up to the same as I measured. Happy to answer and questions that you may have. I have repaired literally hundreds of cd players over the years... including many NADs Cant recall just what the 501 has. But spindle motors cause a lot of problems with cd players.
regards robotek

Posted on Apr 27, 2010

  • Graeme Ross
    Graeme Ross Apr 27, 2010

    My memory is returning somewhat... this unit uses a Philips transport, and you will find that the spindle platter is bonded to the spindle motor shaft, and you may have some problems replacing it. or even removing the spindle platter... It was always replaced as a complete unit. Laser and spindle motor complete as an assembly.

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