Marantz cd52 Mk 11 SE. The tray does not eject or close smoothly as the cog which engages with the rack to open and close the tray has cracked and no longer rotates symetrically. I need a new cog or tray mechanism
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while your daughter was "holding" the tray did you hear any "popping" type noise? This is a typical sympton when the gears have skipped a few teeth! Your best bet(IF your a "handy" person) would be to take the unit apart to get to the CD drive, and CAREFULLY push/pull on the tray to manually "open/close" it, and watch the tray in correlation to the "eye" mechanism, to see if it is aligning with the "hole" in the tray correctly! Good luck!
i had the same problem on a marantz cd-63 which is virtually identical and it turned out to be a faulty button on the control PCB. i replaced it with one out of a scrap PCB and all worked as it should.
If the player "skips" after 15+ seconds the likely problem is the split rack&pinion used to position the laser. The split rack is sprung to remove play or backlash when meshing with the driver cog. This split rack can jump cogs over time, eventually becoming ineffective. The solution is to remove the laser assembly and gently disengage the driver cog, compress the split rack and re-engage the driver cog. This should solve the skipping problem.
you may need to replace the whole mechanism as i've had quite a few philips and marantz cd recorders with the same mechanism with exactly the same problem. when you press open/close it will display open or close with no sign of life from the player. this turned out to be a faulty laser unit and the PCB which is underneath the mechanism seems to go the same way which i found out later when i replaced the laser unit. the recorder worked for around 5 minutes then the laser started moving erratically but then would work again for 5 minutes after switching it off & on again. i cured the fault by replacing the PCB aswell. hope this helps?
the timing will be out of line, thats whats putting in shut-down mode. dis-engage the tape carriage from the running cogs and manually put it in eject mode, re-align the main cogs to their pointers. there should be one on the cogs and on the chassis to help you re-align then re-engage the carriage to its cog.