Question about JVC MX-J900 CD Shelf System

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CD Changer & Tape Deck

My CD Changer on my JVC MX-J900 no longer will play cd's and my tape deck also no longer playes tapes. The CD tray opens and allows me insert tapes, but does not play them. The neither tape deck will not fast forward rewind or play. Could you help me find the problem.\ Thanks.

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Re: CD Changer & Tape Deck


- Disassemble the player.

(you will need only one, long, phillips head screwdriver $5.00)

[It is a tedious job. (first,study how it is put together) There are 6 screws on the back - three down deep holes, three at the bottom, and two dark colored ones on the side. Once the front covering is off, then you start the process to get at the Cassette deck. You will have to unscrew a ground wire; pull the "tape" connections and one wire bundle snap fitting; and then unscrew the two screws on the back, near where the wires for the speaker connections are placed... then remove the Cassette Deck.]

{I sat in my recliner with the whole thing in my lap as i worked with a foot stool near by to put things as they came apart... and i used a metal salad bowl to through the screws into as i went along.}

- Study the drive mechanism.

- See where the drive pulleys are.

- Use small elastic bands to replace the broken belts.
(small = 1/2 inch diameter ... the size of your little finger, but will stretch out to two inches or so.)

I happened to have these on hand:


- I did this on my JVC PC-XC70BK and it worked.

- Both the player-side and record-side decks had broken belts.

[The fast forward and rewind wouldn't work on either side.]

(Per each deck: one drives play, one belt drives both Rewind & Forward)

- Now both decks work.



- My guess is the laser pick up is dirty (because they all face upward and oily film builds up on them).

- First try a disk cleaner with a brush on the underside of it.

- If that doesn't work, then (after taking off the front plastic cover plate {see above}), you can see where the upward pointing laser lens is. If you can, use Rubbing Alcohol on the end of a Q-Tip to probe into the area and thoroughly clean its surface. Then wipe it clean with a dry Q-Tip.

- If you can't get at the laser lens, then Disassemble the Unite.
[There is another ground wire that must be unscrewed from the deck assembly. And there is the issue of the tape connections leading to the top part of the unit ... they will flop around and fall out of their place once you have pulled them from the connectors ... with a bit of observation you can get them back correctly.]

- Unscrew two screws at the back ... then pull out the tray assembly.
.... then go as far in the disassembly as you need to so you can swab the laser lens with the Rubbing Alcohol.

- Re-assemble. I had one screw left over.

... ROTFL but i know where it goes and i don't care to get it there... so to hell with it, right?

Everything works fine now. Not bad for a 17 year old piece of equipment that has a Ten CD storage tray... that you can't get anymore... right?

Posted on Dec 01, 2013

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Re: CD Changer & Tape Deck

Check for dirt on CD laser lenses. Also transmission on tape player.

Posted on Oct 03, 2007

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