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Restoring a Pioneer KP 575 Car audio cassette player

Discussion in 'Pioneer Audio' started by hugues tr4, Nov 30, 2010.

  1. hugues tr4

    hugues tr4 New Member

    Messages:
    24
    Hi All,
    Recently found in my garage a vintage 1979 Pioneer KP 575 car audio cassette player which looks complete and in a quite nice condition. I would like to restore it to use in my Triumph classic car as it takes a minimum of space. Just needs cleaning and have the belt changed. I have uploaded a service manual from "the military Wireless Workshop" and started disassembling.
    Unfortunately, one of the channels is dead (R) and, not being a technician whatsoever, I do not know where to look to fix the problem. One of the small resistors in the amplifier must have blown up due to a mistake in connecting the power-in (common neg wire for both power-in and channel-outputs).
    I have a schematic circuit diagram, but I'm afraid it looks rather chinese to me.
    Could anybody help me spotting the fault and explain how to cure it.
    Many thanks in advance for your help.
    Best regards,

    Hugh.
     
    Last edited: Nov 30, 2010
  2. PacificStereo

    PacificStereo Super Member

    Messages:
    1,738
    This is just impossible to diagnose by remote control. You will need a scope to be able to chase the signal around and see where it stops.

    Very possible that you have a blown-up output device, this used to happen quite often. If you end up needing a device, it's very likely that I have one. I have a lot of Pioneer car audio parts (except belts), so if you need something, PM me.
     
  3. hugues tr4

    hugues tr4 New Member

    Messages:
    24
    Pioneer KP 575 Car cassette deck.

    Hi Pacific Stereo,
    Thanks a lot for the quick reaction!
    I will try and find a radio technician to spot the problem, but I certainly will keep your offer in mind, should I need a specific part to solve it.
    Only problem is we are so far apart (I'm in Belgium).
    Many thanks again and best regards,
    Hugh.
     
  4. hugues tr4

    hugues tr4 New Member

    Messages:
    24
    Hi Pacific Stereo or any other friendly Pioneer specialist(s),
    I know it's been a long time, but I finally managed to start and make the KP575 sing. It' been completely refurbished, only one issue remains: the solenoid activating the head base advance mechanism is shot.
    Does anyone have a spare one (CXP-026) to sell, or can tell me where to get a replacement?
    Thanks a lot for your usual kindness and help!
    Cheers,

    Hugh.
     
  5. hugues tr4

    hugues tr4 New Member

    Messages:
    24
    Hi All,

    Just a question about the KP 575.
    Finally found someone to fix the solenoid (rewinding the coil).
    Now the belt just broke.
    Question: anybody knows about the section of the belt: should it be square or round?
    My tech, who serviced (and salvaged) my KP 575 replaced the missing belt by a square section one: the wow was really terrible (Brenda Lee sounded like a goat).
    I replaced the belt by a round one and it got a lot better and it's this one that broke.
    The service manual seemed to mention a round 2mm thick belt, but all the illustrations show square belt pictures, and there is no other mention than the part n°: CNT072.
    Can anybody lighten me about this?
    Thanks in advance for your usual kind help!
    Cheers,

    Hugh.
     

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