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Perplexing CD Player Problem

Discussion in 'Electronic Repair' started by John Keiser, Feb 8, 2005.

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  1. John Keiser

    John Keiser Guest

    I have a 14 year old Technics SL-PG100 which has given good service. Just
    lately, when I try to play a CD the player notes the number of tracks and
    but is unable to start on track 1. Usually it will start if I skip to a
    later track. It then plays fine and will cycle through track 1 on repeat.
    These home-made CDs played fine a month ago. Bought CDs seem more relaible.

    I opened the case and everything "looked" fine. No dust. Lens shiney. I
    manually cleaned the lens [with a photo camera lens kit] but problems
    persists.

    Diode power fading? Other guess?

    Is there a likely "simple" tweak that might fix this?

    Thank you.
     
  2. I find lots of these types of problems are solved with routine maintenance -
    cleaning, lubing the parts involved, etc. Specifically, I would lube the
    shaft of the spindle motor, and clean and relube the sliding surfaces or
    wormscrew. If it uses a wormscrew there may be a belt that needs changing -
    but these haven't been used in about 15 years or so. Don't mess with any
    adjustments - this would most likely compensate (poorly) for whatever is
    really wrong. The only exception would be the focus offset adjustment, and
    only then if you have a 'scope to observe the waveform.

    Mark Z.
     
  3. John Keiser

    John Keiser Guest

    Thanks. I don't have a 'scope but I'll try a conservative bit of lube and
    see if it clears things.
     
  4. Hi John,
    as far as I know Matsushita/Technics uses Philips CD-drives.
    At that time that were drives with a tonearm guide for the optical unit.
    So, there ist nothing to lube. And bad news, the tonearm drives are not
    longer available for spare parts :-(

    73
    Peter
     
  5. Try a bought CD ! See what it tells !

    Cheers
     
  6. Hi!

    Try reseating all the cables in the unit. I have a Technics SL-P101 which I
    assume to be similar to your unit. It was exhibiting the same exact problem
    until I pulled and then reseated all the cables going to the "drive"
    assembly.

    The player has been rock solid ever since.

    William
     
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