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Pioneer PD-M601 CD 6 disc player need Help

Discussion in 'Electronic Repair' started by Sherry, Oct 15, 2003.

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  1. Sherry

    Sherry Guest

    Pioneer 6 disc PD-M601

    I need to know how to put into test mode. It does not have a button
    on the main board called test, just a 6 pin TP1. Do I need a special
    cable? It moves the slider to home, but the spindle never spins all
    the time and jumps to the next CD. Laser lights and moves in and out.
    It does not show a voltage on the spindle motor.
  2. Nigel

    Nigel Guest

    The most common cause of this symptom on this model is spindle motor
    failure - virtually everyone dies at some point.

    Disconnect the motor and measure its DC resistance. If it's less than 15
    Ohms, replace the motor.
  3. Does it focus? May be unable to achieve focus lock so not spinning.

    Did you clean the lens?

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  4. Contrary to another post here, the spindle motor, while a possibility, is
    not as common as the other poster says. Older Pioneers suffered from it

    Yours is more likely to have a bad flex cable from the pickup to the main

    Is it white colored? If so, replace it with the improved type PNP-1343.

    Mark Z.
  5. Nigel

    Nigel Guest

    I'd disagree with you that the PD-M601 isn't an 'older' player, given that
    the additional check you have suggested - which I fully agree with - was
    issued as Pioneer Service Bulletin PGB/148 in November 1992, which also
    gives the following information that may be of use to the OP

    "The ends of this cable are conductive on ONE SIDE only. With the
    conductive side facing you, put a 45 degree crease in the cable about two
    inches from the top end. Insert the short end of the cable into CN0102 on
    the laser assembly with the conductive side UPWARD. Bend the cable over and
    hook it into the PWB holder. Bend the free end over and insert into CN201 on
    the main PCB with the conductive side facing the mechanism."

    Given that the unit has to come apart, I still see no reason not to test the
    spindle motor as well as checking the flex cable.
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