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My cd disk tray won't go back in - Audio Players & Recorders

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The slider mechanism, depending on the age of the unit and the manufacturer, consists of the small chrome rail, a drive motor, a small gear assembly, and (in some units) a small belt that drives the slider unit via the motor. This small belt causes all sorts of problems. If the belt is broken or slipping, it can cause skipping, dropouts, or simply no start up at all. Also, if the belt breaks in the middle of the disc, the drive mechanism gets hair or dirt wrapped up into the gears, or the pick-up assembly doesn’t return to the start position (called home), the unit will (99% of the time) refuse to release the disc, causing it to become stuck inside the unit. There’s a little micro or leaf type switch located at home position that sometimes gets dirty or breaks and, causing this problem also.
If the disc starts to spin slowly and doesn’t come up to speed, the spindle motor that’s attached to the turntable platter is a common problem. There could also be a problem with the spindle motor driver controller IC or the power supply regulator that supplies voltage to the driver IC. If the disc starts to spin and then spins really fast, or stops and starts to spin backwards, your problem is the laser pick-up assembly or the servo control circuit. If you continue to have problems after cleaning and checking the other things listed above, you may have a problem with the player's alignment. Of course, one of the problems you'll face checking alignments on a DVD/CD player is that you’re going to need to use an oscilloscope on most of them. If you have the proper tools and equipment, the first thing to look at is the RF pattern of the unit while its playing. It should be a sharp and clear pattern. If it's dull and smeared, then the laser could be weak.
Also, in these units are very critical alignments called the focus/tracking gains and offsets. When these alignments are off, it can often cause intermittent troubles. As the unit ages and parts change value, so do these alignments, and will need to be checked. In my time as service technician repairing DVD/CD players, 65% of the laser pick-up assembles I have tested were good and only needed a small adjustment. Today's technology makes it unfeasible for a shop to hook up a DVD/CD player, and even some recorders, to their equipment and make these adjustments because of the cost involved.

Hope this may help;

Regards,
VOTIT

DON'T TO FORGET TO RATE

Posted on Jul 31, 2008

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I have a Philips CDR820 CD recorder/3 CD changer. The CD tray won't stay in. I push the load/close button, but it closes and then immediately opens again. Won't stay closed. Not sure what to...


I have done this job. taking that think apart can be a pain.

There is probably a switch, that is pressed, and senses the closing or status of the tray,
and it keeps resetting. It could be a leaf switch, that would be lucky.
It could be an encased switch. You would need an exact replacement in that case.

The leaf switch could just need to be cleaned with a folded dollar bill.
Its perfect for cleaning a couple of contacts, and its not destructive.

Its a shame to throw something like that away, for such a small problem.

Maybe you could sell it at a garage sale to some kid after you tell 'em what the problem is.

Point being, taking that kind of thing apart, and putting it back together again, might not be worth the stress that goes with it. I've done it because I am POOR, and if I had money, I wouldn't go through that aggravation.

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1 Answer

Disks fell down the back of tray, when they were pulled out the cd unit does not work anymore. Any suggestions?


Do other CD's that work in your CD player still? If they do then I am lead to believe your CD's might have got some good scratches on it. Perhaps have them resurfaced and try them again. If no CD's work I would suggest a CD lens cleaner disk and see if that helps. If still no CD's at all will play then you may have knocked your lens out of alignment a bit. That would have to be addressed by a tech. Good luck.

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The cd tray to my hifi is not woring


If there is a disk in the tray that is not properly located this may be causing a jam - you may be able to get it open by carefully pushing something thin (like a credit card - or another disk ) in to the top of the tray slot to hold the disk down - take care not to push it all the way in!). At the same time prise the bottom of the tray VERY gently with a small screwdriver whilst pressing the eject/open button.
If that is not the cause of the problem the plastic cogs or the rubber drive belt that operate the tray mechanism may be worn / broken. Repair/ or replacement of these components is possible if you can locate the correct parts (try Ebay) but as CD or DVD players are so cheap to buy it may be simpler just to replace the whole unit.

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When the CD player loads properly and still reads as no disk this indicates that the player lens (Optical device which reads the disk information) Is either dirty or bad. The only option you have is to get a disk lens cleaner and run it on the system. Once you run it, it is supposed to work if the lens is not spoilt. Otherwise you will just have to replace the lens by taking it to a repairer.
Hope this solution has been helpful?

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The cd player door will not close when I press the open/close button.


Did you count your disks when it opened? Maybe one is laying inside blocking the tray from going back... did it open o.k. ? If you had to pull the tray out and now it won't go back you may have a bad motor or belt.

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Let me respond with a possible solution although I'd bet that both of you already tried these.

The reason I checked into this is because I'm looking for a new mini system. I happen to be at Target and they only had 2 models - this one and a SONY. I certainly didn't want to buy the RCA given these problems, so I asked the salesperson, who seemed to have some knowlege.

As far as opening the tray on top, there is a button to push right under the tray. The button has an icon of a triangle on it. This seems to be somewhat of a standard icon for opening the tray or ejecting a CD (my car's CD has the same icon for ejecting a CD).

As far as only being able to get 3 CD's out, there is another button under the tray marked "disc skip". This rotates the tray. When you open the tray, you can only get to 3 of the CD's. When you push disk skip, it rotates the tray one position, so you can get the 4th one out. Another push and now you can get the 5th one.

Sometimes my CD changer doesn't shuffle the disks. If I only have 1 CD or DVD in it and push the tray open button, the disk stays in the unit and the tray revolves to an intermediate position. I push the button to put the tray back and try disc skip; that usually works.

If your problems are not solved per above, then I definitely do NOT want to get this.

Fred

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Aiwa NSX-V70 will not recognize that a CD is present. 3 disk tray rotates, CD disk is "picked up" when selected, but the system does not read the CD.


Hi there. Found your post as I was looking for an answer to the same issue with my NSX v70 about an hour ago. I'm pleased to say that I found a solution on the web and mine is now working fine!

Try this address below and follow the instructions. The knob you need is black, with some white numbers on and can be seen from the back of the unit once you have removed the black casing and the silver back. Quite easy when you know how! Good luck.

http://www.kuro5hin.org/story/2004/3/24/45212/6874

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Jammed CD tray system


You may have a disk that fell out of tray onto lower mechanism. Be careful when disassembling mechanism as they have timing gears that are positioned to perform certain functions

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