Philips is a European concern I think and they bought Marantz a very long time ago - not sure if they still own marantz though (they also had 25% of B&O at one time, hence their products having much Philips content inside).
I'd have thought that 1992 production may have had the CD-M9 mech (the last swing-arm one), but if yours is the 12, then carefully lubing the laser runners and slide (they go sticky) may be all you need to do mechanically.
The cap MUST be replaced, as leaky ones aren't functioning properly. Maybe try one with the next voltage rating up (hopefully an engineer can comment better).
Depending on the CD-M12 variant, you should be able to locate a replacement with little cost and difficulty I think.
Good luck
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