Question about Technics SL-MC4 61-Disc CD Changer

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Unit is locked

Unit got moved with discs still in it. Unit locked up and continues to display 'checking discs'. Can't open door to check status of discs.

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Re: Unit is locked

Take the 4 screws from the sides and the two in the top back of the unit. What has probably happened is that you have a cd laying on the bottom of the unit and the arm can not make the entire sweep. cdt

Posted on Oct 08, 2007

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Tech SL-MC410. Continously displays "Checking Disc"

When the unit is saying "Checking discs" and neither goes further nor turns off (just says "Off" but doesn't), the reason is still the main belt (accessible from the top as soon as you lift the cover) that is too loose. When the belt is way too loose, the unit doesn't move at all, if the belt is little too loose, the player-unit will move a bit, but there is not enough torque on the gears to reach the end position (where the player unit is secured against movements).

May 07, 2012 | Technics SL-MC400 110-Disc CD Changer

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Player was moved discs fell forward. Now when the player comes on it makes a horrible sound. Can't get door to open

you're going to have to open the player by removing the top cover and returning the discs to their correct places on the carousel. If you've coded the discs' locations and disc names it will be a pain to have to re-code them, I don't know if the memory will clear if you take the discs out and power the unit up and it finds they're not there.
I believe the discs being out of place are what is preventing the door from opening. It's operated by a motor located under the right front of the carousel, and the only way to get it it is to remove the carousel.... which isn't hugely easy but it can be done, you'll have to take the top stuff off inside, unplug at least several of the cables etc so you can move the top board out of the way. Make sure that all the discs are back in their places on the carousel, OR removed, before you turn the unit back on.

Dec 02, 2010 | Sony CDP-CX400 400-Disc CD Changer

1 Answer

Discs have been dislodged form the unit - How do I open the unit

Have to remove the top cover and carefully
remove all the cd's without scratching them!
Should operate normally after that!

Apr 20, 2010 | Sony MegaStorage CDP-CX355 300-Disc CD...

3 Answers

It says off and thats all

CD stuck in player.
Remove lid, small black screws on side and along the top of the back.
Fiddle with latch on left side near front that controls the door.
Once latch is released, open door and remove all CD's.
Make sure 2 CD's are not **** in player.
Move CD cage carefully. It should run smoothly along. If not it is locked in 'switched off mode' or CD is stuck half in and half out. If CD stuck fish CD out carefully.
Plug back in without any CD's in.
System should run back and forward and then lock at left hand end.
Put lid on and try one CD in one slot.

Dec 27, 2009 | Technics SL-MC6 CD Player

2 Answers

CD Discs have been displaced inside the unit while moving

Had this happen to me awhile back while I was fixing a DVD scratch problem with my 400 changer. As I recall, the top cover comes off easily (a few side and back screws and perhaps an internal top try cover) and you can access the disks easily to reset them in their slots. Obviously, you should unplug the unit before you open it.

Jan 28, 2009 | Sony MegaStorage CDP-CX455 400-Disc CD...

1 Answer

Key will not turn to open the front of the unit

Firstly, the key should be marked WU01. If it isn't then you are trying to open it with the coin box key.

The door has a foam seal on it to prevent dust getting in. To open the door simply turn the key clockwise THEN firmly press the door shut (to ease the tightness) by pressing on the three metal ribs on the door frame...and the key should continue clockwise and unlock the door. Don't press the plastic or you will crack it and maybe break a tube.

Dave F.

Jul 31, 2008 | Wurlitzer Jukebox 1015 One More Time...

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Denon CD unit will not play due to err

The problem is in the mechanism,maybe when you put another disc while playing that is cause. There is a misaligment there in the tray you better checked it out,and also the lense by using a cotton buds.thats all for now Hespbb....

Jun 19, 2008 | Denon CD Players

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Unit will not acknowledge presence of disc.

checkout hifiengine for service manuals when you join ( free too )

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Message 'no CD' always appears, but I can see the CD in proper position, but not spinning.

if you shut cd draw with no cd in, does the laser lens move up or down at all. if it does suspect dead laser pickup. it is very common for lasers to fail

Jan 11, 2007 | Teac AD-600 3-Disc CD Changer

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