Question about Audio Players & Recorders
I have a JVC music system (CA-S20BK)which is working perfectly except for the cd player. When a cd is inserted into the player the cd door closes ok but the cd does not rotate in the system and a "no disc" message comes up in the display. I have tried cleaning the optic but to no avail. Any bright ideas? IS THIS A CLEANING PROBLEM?
The tray should have a micro switch to touch when its closed. maybe it needs some fine adjustment. if it doesnt say closed then the laser drive wont start. or maybe the magnetic clamp hasnt come down onto the disc properly
Posted on Nov 09, 2017
SOURCE: Not Recognising a CD
I got a second hand 541 a few weeks ago. After many hours of listening pleasure an no problems at all, the machine stopped spinning CD's, both copied ones and original ones.
The sollution for my problem was simple after some figuring out.
Open the CD tray.
Power off the unit with the tray open.
Open it up.
In the CD frame in the back there are 2 srews that hold the CD engine unit in place. I untidied these screws just a little bit.
I also untidied the screws that hold the cd clamp cover on the top a little.
After this it loads all my CD's fine again.
Posted on Feb 28, 2008
If your CD player has been working for many hours and cleaning the lens didn't help, then the next thing to do is changing the spindle motor (the one that spins the disc), since the brushes and the commutator get dirty/oxydized with many hours of performance.
The motor can also be cleaned, but it's kinda complicated and delicate to do it, so you might want to change it instead.
The same holds for the slide motor (the motor that changes the position of the laser pickup).
To clean the motor you need to desolder/remove it and open it up (you need to bend out the clamped parts on the motor housing to release the cover - also, mark the position of the cover so you can put it back in place in the same position as it was prior to opening it - some motors have an indentation so that the cover fits in place in only one position).
Then you need to remove the cover (this is a delicate procedure as you can easily damage the brushes).
You can clean the brushes and the commutator using a long pointed scalpel - gently scrub away the brownish/black residues on both the brushes and the commutator.
Now you need to put the motor back together, taking care not to damage the brushes when you put the cover back in place (kinda tricky but it can be done).
After closing it, see if it runs smoothly, you may want to try and run it on some 3 volts - it must run quite silently, with no more than a gentle humming sound.
If it runs ok, you should use a tiny flat screwdriver and a small hammer to bend the housing edge back onto the cover to fix it in place (basically, you need to rehammer back in the clamps that held the cover in place, this is also a bit tricky and delicate thing to do).
Now reinstall/resolder the motor back in place (motors on some brands/models can be worked without removing them).
Well, i've just told you how i repaired quite some CD drives which were virtually dead, i'm actually still using a yamaha which is more than 15 years old (i myself have been using it for at least 10 years now), i got it as a scrap piece, it returned to life after the above described procedure and it actually works perfectly up to date.
Anyway, i guess the easy way is to simply replace the motors (they need to have the same axis dimensions and mount holes as the original ones, also they need to run on the same voltage - things to keep in mind when you are looking for new motors).
Hope you can get it working...
Posted on Jul 24, 2009
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