Need instructions on how to open up this unit so i can get at the changing(cd)mechanism (5 unit changer) and laser optics so i can clean the optics and check the proper spinning of a disc? There are screws on the side of the unit etc,but do not know which ones to use. Thanks.
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This does happen with CD trays, it's quite common. I can't remember the exact mot common cause, but it's some worn out part, such as a small (plastic) cog wheel. Search on "cd tray won't open" on the internet to find a multitude of reasons, most to do with computer CD trays, but I guess the mechanism is essentially the same. These may also describe ways round the problem.
Some CD players have a small hole on the front near the tray into which poking a straightened out paperclip should enable you to open the tray by a few mm, enough to be able to pull it open in an emergency - but it's awkward to do on a frequent basis.
It is quite possible that the timing within the mechanism had changed. Since the timing is quite important to activate the mode switch to triggerr the sequential action of the mechanism to proceed accordingly, a small change in any of the links can change the mode to keep away from resetting. Please open the set and check if there is any foreign particles lodged into the dirve mechanism. Clean and proceed. Check carefully for any sensors that are out of sync.If you are not sure do not attempt but try tomake a small correction to complete the loading so as the complete the mode. If so the fault might clear. Hope this helps you out.Good day
it might be a sticky mechanism inside the unit. open it up spray a little WD40 on to the tray mechanism and should work (protect laser while doing it).
A REPAIRER WILL STILL FIX THE UNIT EVEN IF IT HAS BEEN OPENED
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?
Was there damage to the case after shipping? It would seem so due to display and other functions not working. Your remote has no open/close function. That leaves two options; remove the covers and try to manually remove the disk (which I don't suggest) or have the unit serviced. I found no manual release for the Disc tray, which some units have, but even if it did that wouldn't solve your problem. I would guess you have broken wiring or a damaged/cracked circuit board on the front panel.
These units are known for getting out of time. There is an engineering modification that can be done to prevent this from happening again. Your best bet is to bring it to a Panasonic authorized service center. They will rebuild the CD loading mechanism and make the appropriate changes. I have made this modification numerous times and have not seen a return of the problem once completed.
The loading mechanism needs to be rebuilt. There is also an engineering change that should be applied to this unit if it hasn't had the mod already. This is not a home repair. This unit should go to an authorized Panasonic service center.
It had to happen.... Af6ter having worked on more than 50 of these kinds of mechs i can definitely say they get old fast! What you will need to do is realign the cd changer if you are willing to put about 4 hours work into this then let me know and i will see if i can hunt down the realignment manual for you.