Question about Aiwa Audio Players & Recorders
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Posted on Jan 02, 2017
SOURCE: Aiwa NSX-SZ10, reacts to all
Manually cleaning the lens
To locate the laser lens, look around the door or drawer of the DVD player and you will see a small circular disc, which is often called the turntable or disc platter. Right off the edge of the platter you should see a small clear lens. There are some manufacturers that have had problems with the lens, depending on the age of the unit. In these problem players, moving the unit to a different location, turning the unit upside down, or sometimes even without moving the unit, the lens can become detached from the laser assembly and floats around inside the unit. You can re-glue it back with a little crazy glue, BUT it must be perfectly centered, and without getting any glue on it. So, if you don’t see the plastic lens, but instead see the laser pick-up assembly, look around for the lens inside the unit and glue it back on.
To clean the lens you must use very little pressure. Take a cotton swab and barely moisten it with plain, non-scented, or oily type alcohol. In a swirling motion, very gently rub the lens until you’ve covered it entirely. Then repeat using the dry end.
If the cleaning didn’t help, don’t despair just yet. You can see if there’s a problem elsewhere in the unit by using a few simple tricks and tips.
First thing you want to see if the unit’s laser is in good working order. This method isn’t foolproof, but most of the time works admirably. When you insert a disc, see if you can look up underneath where the disc sits on the turntable. Observe the laser lens going up and down. If the lens is trying to focus, that’s good! After a few seconds of the lens trying to focus, the platter should start to spin. On almost every CD/DVD unit I've encountered, the unit won't spin unless the laser has properly focused on the surface of the disc. If the unit spins up and and then shuts down, you should check and make sure the laser pick-up assembly slider mechanism is working without any obstructions and that the small chrome rail that it slides on is slightly greased. Don’t go overboard with the grease though, as too much can cause all sorts of problems.
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;
DON'T TO FORGET TO RATE
Posted on Aug 07, 2008
Soooooooo many people have complained about this system not reading discs properly, yet the solution is incredibly simple. All you need to do is calibrate the lens, and you can do this without even opening the stereo! Here's how:
With the stereo all unplugged, turn it around so the back is facing you.
Now use a flashlight and, looking through the grating on the back, approximate where you think the cd lens mechanism would be. You should see 2 8-pin connector wires side by side (one red and one white) and to their right a small black circle screw type thing.
Using a screw driver, turn the screw thing about 1/10 of a revolution clockwise.
Plug in, and test with a clean cd. If nothing happened, repeat the procedure turning the screw thing in tiny increments (don't over do it.) Eventually, the cd player should recognise the cd. Keep fine tuning and testing until you've found the "sweet spot" where it recognizes and plays cds optimally.
Overall, you should NOT have to turn any more than a full revolution, and even half a revolution is pushing it. What you are really doing by turning this screw is fine tuning the "data reading point" of the laser. Too close and it will focus on the area between the cd and the lens, causing failure to recognize the disc. Too far and it will focus past the data perhaps recognizing the disc but not being able to read it. I believe the major problem with these players is that as they settle in, the area between the lens and cd changes. This would cause a gradual degrading in performance until the player finally failed to recognise any data at all (which is exactly how mine went personally.) There isnt a problem with the quality of the lens itself, therefore it is very fixable!
I have heard that all 3cd Aiwa Mini-systems share this problem so, as long as the calibration tuning screw is exposed through the grating on the back, this fix should work for any of the Aiwa mini-systems with this particular problem. If the screw isnt exposed, it is still possible to get at by opening and dismantling the player. (Unfortunately, i did not originally notice that the screw was accesible through the grating, so i went about pulling the entire system apart and wasting hours of my life. You can thank me later for saving you this tedious trouble as you're listening to cds on your newly fixed player ;-) )
If this doesn't work, or doesn't fix the problem completely, try cleaning the lens. You can do this by either by using a cd lens cleaner (looks like a cd with a brush built into it) or opening up the stereo and using a soft cloth on the lens. You may also want to try putting the screw back to its starting point and using the same procedure but turning the screw counter-clockwise. (I personally had to turn clockwise but who knows, maybe your player settled in differently.)
As for the mechanism itself, i have no idea. I did notice, however, that the lifting mechanism sometimes picks the cd up off-centered causing failure to play. You can semi-fix this by holding the stereo at an angle while it picks up the cd or placing it off-centered in the tray. Its annoying, but it works :)
Posted on Jan 03, 2009
I thought that I had the same problem. I then discovered that when I put 3 CD's in it started up on it's own. If you push the demo button you can see how it's supposed to light up the number of tracks in a square on the right of the display. It wasn't doing that until I put in all 3. Then it started up and I was able to use the disc 1, 2 & 3 buttons to change from 1 CD to the next and I used the Up and Down buttons to change songs and the play button above the tape deck is multi-functional. Hope this helps.
Posted on Apr 27, 2009
Without speakers indicates that it is shutting off due to thermal protection. Do not store anything on top of it, especially any device that has heat of it's own and give it plenty of air space all around it, at least 6 inches.
Posted on Jun 18, 2009
Use VIDEO/AUX instead. MIC is for the smaller input signal that a microphone would typically produce.
Register and download the manual for free at retrevo.com
Use your PC soundcard controls to adjust the output to something useable (max?).
Posted on Apr 30, 2011
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