Philips CDM4-mechanism

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  • Xenon-Codex
    Senior Member
    • Jan 2018
    • 183
    • Finland
    #1

    Philips CDM4-mechanism

    Two totally different cd-players, but the mechanism was almost plug and play, only needed to change the connector for the spin motor. Technics SL-PJ28A -> Marantz CD-40.
    Note: SL-PJ28A is more different with identical looking SL-PJ28 than the Marantz...
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    • Xenon-Codex
      Senior Member
      • Jan 2018
      • 183
      • Finland
      #2
      Re: Philips CDM4-mechanism

      Is there any adjustment, sometimes it skips a bit when "cold" while playing CD-R's. No skips when it has been on for a couple of minutes.

        Comment

        • stj
          Great Sage 齊天大聖
          • Dec 2009
          • 30941
          • Albion
          #3
          Re: Philips CDM4-mechanism

          that will be a capacitor,
          they have better performance when warm

            Comment

            • Xenon-Codex
              Senior Member
              • Jan 2018
              • 183
              • Finland
              #4
              Re: Philips CDM4-mechanism

              Originally posted by stj
              that will be a capacitor,
              they have better performance when warm
              Where's that cap? I got the player as it would not play to the end, and made some clonking sounds. I can still hear those occasionally.

                Comment

                • UNITRAX
                  Senior Member
                  • Jan 2023
                  • 64
                  • POLAND
                  #5
                  Re: Philips CDM4-mechanism

                  https://www.diyaudio.com/community/t...sports.372412/

                  Page one, post three

                    Comment

                    • Xenon-Codex
                      Senior Member
                      • Jan 2018
                      • 183
                      • Finland
                      #6
                      Re: Philips CDM4-mechanism

                      Changed the cap to 22u (which the old one was), but first it went only worse. The original cap had 6% Vloss. Then I changed to 47u which was in the service manual, it seem to work better.

                        Comment

                        • Xenon-Codex
                          Senior Member
                          • Jan 2018
                          • 183
                          • Finland
                          #7
                          Re: Philips CDM4-mechanism

                          It was the clamp. I managed to move the fault to another identical Technics, only by moving the clamp. It had a dip in the middle of the small plastic thing which should be smooth.

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