Question about Audio Players & Recorders
see if the player tries to read the disc. Load a disc and listen.
Does the player make squealing noises or is it totally quiet? Squealing noises may indicate that the player is trying to synchronize with the disc but can't due to an obstruction on the lens or in the laser path inside the pickup or a defect in the pickup. This can also be caused by an intermittent signal problem due to a faulty ribbon cable.
Totally silent means that the photo sensor is not getting any usable input from the laser at all, meaning that the pickup is "blind" for lack of a better word.
This can be caused by an obstruction of the beam by foreign matter on the lens or inside the pickup all the way to a marginal or failed laser diode and/or photosensor array. This can also be caused by a bad ribbon cable with one or more severed traces.
You could try to clean the optics. This is the most common malfunction as far as i know in all disc players. It would involve taking the cover off and finding a way to expose the lense, and then cleaning it with a very gentle brush. some players have a cover for the lense that swings to the side during playing, this greatly reduces the chance of dust accumulating, but its still worth the try.
If you actually see dust on the lense, then its just that simple. clean, close, play.
It may also be worth your while to check on the small shafting that guides the carriage of the laser pickup. Dirt, grome, dust and solidified lubricant can cause stoppage of the carriage and the laser eye then fails to read the next track. Please refer to the image i have attached.
Posted on Jun 24, 2008
I had a similar problem with my Yamaha DVD player which just kept displaying "reading, reading and reading"- eject-no disc or disc error. I took it into be repaired and was told it needed a new optical lense-cost $120.00 plus fitting.I was told not viable to fix. Not convinced I had a look on the internet and a suggestion given was to buy a can of Air Spray from **** Smith,$14.00 later and blowing the proverbial out of the inside of the unit-Bingo it works for about an hour and then, away we go again-reading reading reading - eject-no disc. Back to the internet and i found a DVD technician who advised the more often than not the problem is a dirty optical lense, and he has saved 100's from the grave by the following method. The most effective way to clean it is with a cotton wool bud soaked in Isopropyl Alcohol and give it a good rub without damaging it. I got the Isopropyl alcohol for $12.00 a 250 ml bottle from the local chemist and did what was suggested. IT WORKED and is still going- not sure for how long but the bonus is I can use the remainder for rubbing down my tired old body, as after shave or a refresher, in addition to fixing DVD's so not all is lost. It's worth a try considering I was going to throw the Yamaha away. Thanks to the internet and the good people who share their knowledge I am happy again.
Hopefully it will work for you. If not, don't forget the other uses for the alcohol.
Posted on Mar 10, 2009
SOURCE: cd tray stays open
There could be damage to the tray contact switches
(these tell to the control unit the position of the tray - open/closed), so that the control unit can start/stop and reverse the direction of the tray ejector motor.
These contacts are located somewhere underneath the tray (usually near the front unit cover), and since you mentioned that the tray was bumped while it was open, it is possible they were damaged. Also, the behaviour of the tray suggests that the control unit can no longer tell whether the tray is open or closed so it operates the tray motor in a wrong manner, which, again, points to these same contacts as the possible cause.
Repairing the contacts may be a somewhat delicate procedure, first you need to locate them (it may require partial disassemby of the tray mechanism), if they are bent a pair of tweezers might do the job, if there's hard damage, it's probably better to replace them (scrapped CD ROM units or a dead CD unit might be a good source, they just need to be of the same dimensions).
There may also be other causes for this malfunction, i just mentioned the first thing that i would check.
Hope this helps somehow.
Posted on Jul 16, 2009
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