My mother bought this Marantz 74CD67 CD player in 1996. Twenty years later, it was unable to read reliably.
This comprehensive list of CD player mechanisms at http://www.dutchaudioclassics.nl/philips_cdm_cd_mechanism_list/ (local copy) showed I needed a Philips CDM12.1 mechanism. This was easy to find on ebay as a “VAM1201 VAM1202 CDM12.1 CDM12.2 laser transport mechanism for Philips NEW”. Total cost with free shipping from Hong Kong was $13.
I also found this detailed guide to replacing the laser mechanism https://www.hifigear.co.uk/blog/marantz-cd63se-laser-transport-mechanism-replacement/ and the Marantz-CD-67-SE-Service-Manual (which wasn’t that helpful for this particular repair).
Here is the player opened up.
Undo the three connectors and unscrew the CD assembly.
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There is another connector for the daughter board.
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The CD mechanism in its plastic sled.
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The new and old look very similar.
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In fact, at this point I was very pleased I took the previous photo so I could double check I didn’t mix up the old and new mechanisms :-)
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Put it back together and it works! Hopefully good for another 20 years.