Question about Technics SL-MC6 CD Player

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CD tray got knocked off track

I just bought a brand new Gateway GM 5424 PC. While the CD tray was in the open position my boyfriend bumped into it, I heard a cracking/popping noise, and one side was knocked out of the frame. He then (before I could stop him) pushed the cd tray back into the slot, but it would not roll back in. When I look inside I can see that the left hand side of the cd tray has slots running from front to back. There is a white plastic gear that fits into these runner slots, and spins another smaller gear. The cd holder/tray only rolls about 1/3 of the way in, and in the back I can see a circular shaped piece (I think it's a piece that rises into the hole in the cd to keep it in place). That circular piece raises up and blocks the cd tray from sliding all the way in. Is this a problem that I can fix myself or do you recommend having a professional do it? I do not have much technical experience, but I wonder if I can take apart the computer and reposition the cd tray correctly on the runners? Would it be better to make the repairs or just replace the whole cd player? I just discovered this great site- I hope someone out there can help me with this one!!! Thanks, Kate

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Re: CD tray got knocked off track

You can try to fix mechanics by takin apart cd, remove tray and try open/close operation WITHOUT tray. Leave it as OPEN, then try to place tray back in fully open position, but be careful, you have to pres OPEN and then unplug it from outlet to avoid electric shock risk. BE CAREFUL!!!

Posted on Oct 04, 2007

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Cd not able to play last few tracks knocking sounds

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You get the tray out by releasing the retainers. Then cycle the unit so it is in the eject mode position and with the power off on the unit insert the tray so that all the gear mesh and the tray can go all the way in. If it goes partially in then the mechanism must be adjusted so that the tray can make it all the way in. Turn on power after than and check in and out before using a disc. If the unit does good with no disc then use a test disc just in case there is still a problem.

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My NAD C 541 cd player will not play any discs. I open it put the disc in and it tries to scan and then rejects the disc and opens on its' own. There is the word 'over' in red below the track number...

It could be the belt for the tray mechanism. Tray closes then motor is pushed up to CD. If belt slips or physical mechanism is sticky CD will not spin and tray will reopen.

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1 Answer

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There could be damage to the tray contact switches
(these tell to the control unit the position of the tray - open/closed), so that the control unit can start/stop and reverse the direction of the tray ejector motor.

These contacts are located somewhere underneath the tray (usually near the front unit cover), and since you mentioned that the tray was bumped while it was open, it is possible they were damaged. Also, the behaviour of the tray suggests that the control unit can no longer tell whether the tray is open or closed so it operates the tray motor in a wrong manner, which, again, points to these same contacts as the possible cause.

Repairing the contacts may be a somewhat delicate procedure, first you need to locate them (it may require partial disassemby of the tray mechanism), if they are bent a pair of tweezers might do the job, if there's hard damage, it's probably better to replace them (scrapped CD ROM units or a dead CD unit might be a good source, they just need to be of the same dimensions).

There may also be other causes for this malfunction, i just mentioned the first thing that i would check.

Hope this helps somehow.


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i had the same problem. my brother took it apart and found that the belt that opens the tray was snapped. he bought a new one at radio shack and replaced it. but now there's a new error with no code. so thats as far as i can get you. sorry. =)

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