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Sony CDP-101 service manual

Discussion in 'Electronic Repair' started by Andy Cuffe, Jul 17, 2003.

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  1. Andy Cuffe

    Andy Cuffe Guest

    I'm trying to get one of these early CD players working and could really
    use a service manual. Does anyone have one they would be willing to
    sell? It doesn't appear to be available from Sony any more (part
    numbers 9-951-028-12, or -21). My player has a problem in the DAC
    circuit. I suspect the CX7934 which is the last processing step before
    the DAC. All I get coming out of the CX7934 are square waves of various
    frequencies which never change. Only one line between the CX7934 and
    the DAC is changing and the pops coming from the audio output correspond
    with the changes in this signal. The laser is tracking; search, seek
    and play all respond properly.
     
  2. Nigel

    Nigel Guest

    Don't know if you'll get the manual nowadays, but a common fault listed in
    the Sony Fault Finding Guide of Nov 1986 is indeed IC503 (CX7934 Part No.
    8-759-905-52) causing "Clicks on both channels after approx. 10 minutes"

    The only other faults listed are
    No sound - EFM demodulator defective (IC502 , CX7933 Part Number
    8-759-905-50)

    No functions when cold - dry joint on R584
     
  3. Andy Cuffe

    Andy Cuffe Guest

    Thanks for the reply. That would seem to agree with my diagnosis of the
    CX7934. It's not available from sony and the CX7933 is $50, but out of
    stock. I'd still be interested in a service manual if anyone has one
    they don't want. Any ideas on places to look for an obsolete IC like
    this?
     
  4. Nigel

    Nigel Guest

  5. Andy Cuffe

    Andy Cuffe Guest

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