Tip & How-To about Aiwa NSX-DS55 CD Shelf System

Fix it yourself

Make sure the optical eye is clean, Use cotton swap. If that doesn't work and you are handy do the following.


To start with, make sure that your CD player is suffering from the problem that this method is designed to fix. This method is designed to fix a misaligned CD read head. The common symptoms of this problem are:
1. You place a CD in the player, and it spins for a bit but never finds the list of tracks on the CD and returns some kind of error. This problem may occur regularly or intermittently.
2. CDs tend to skip frequently, even if they are clean and in good condition.
So if this sounds like your problem, then this method is for you. You should however bear the following in mind: only attempt to fix the CD player if the fault occurs frequently and is really annoying; i.e. if you are thinking of throwing the CD player away. To carry out the repair you will have to open the case. This will certainly render void any warranty the device might have, so if your player is still under warranty, don't open it. Simply return it to the retailer. Finally, for your safety and that of your equipment be sure to disconnect your CD player and remove any batteries at least a half hour before you start work. Finally, although I have had consistent success with this method, everything you do is at your own risk and is your own responsibility. I provide no guarantee of any nature regarding this method.
Your first job is to open up the case of your CD player. This will be more or less difficult depending on the type of device. If you are lucky and have a Hi-Fi separate type device then it will be pretty simple; if you have a mini or midi-system with a built in CD player this could be trickier. Fixing portable CD players (e.g. a Discman) is probably only for the uber-patient as it is likely to be very fiddly. The main thing required here is patience and a methodical approach. As you remove screws put them somewhere safe; line them up in the order in which you removed them, or make notes of what goes where. You may reach a point where you think you have taken all the screws out but you still can't get into the case. Here, patience is still the key. Check under stickers for hidden screws or clips. Try and work out where the case is held together. Use the minimum force possible at all times.
Now, assuming you have managed to get into the case successfully, and have got access to the CD player we can continue. By now you will probably be able to see the CD tray (the bit that holds the disk) and also some kind of arm which hovers over the disk when the tray is closed. There will usually be a small motor for moving the lens over the disk, and attached to this or nearby there is typically a small circuit board.
On this board, or in any case rather close to the read head there can usually be found a small potentiometer (sometimes referred to as a pot). This will usually be a small square component with a plastic disk on top, and this disk will have a slot which is designed to take a small flat head screwdriver. This is what we will be adjusting.
However, before doing this it is advisable to use an indelible marker pen (magic marker) to mark the current position of the Potentiometer, so that it can be returned to its original position if necessary. With this done then we are ready to start fixing your CD player.
This is essentially a trial and error process. You make a small adjustment to the position of the potentiometer, then try the CD player and see if it is improved. In my experience generally only small adjustments (less than plus/minus 30 degrees of rotation) are usually necessary.
Depending on how comfortable you are working with electrical devices there are different ways of going through this trial and error process. If you are unsure of yourself or particularly safety conscious then will probably want to put the case back on the CD player each time you test it because you will probably have to plug it in to do this. However, as you have probably guessed it is not necessary to put all the screws back in.

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1 Answer

when disc inserted reading shows "00" and disc doesn't play


In most cases when the CD does not play it is possible that the optical head is a suspect. Sometimes it might pick up ordinary audio CD but will not play other formats. This indicates that the optical head is weak and so there is no detection or scanning of the CD . If the optical is working the tracks will be read immediately but with no scanning the laser head can be defective.

The main motor will not work in some cases as unless the tracks are read the drive motor will not work with signal from the processor. Also in some cases the central motor base can shift and so the distance to the disc can be more resulting in low detection. You can pull up the spindle to come closer.
Sometimes certain cleaner disks will not be tracked to run for cleaning as it will not be read and so will reject. Hence it is ideal to manually clean the laser head eye using a cleaning swap /cotton bud with gentle pressure on the lens eye.
If there is no result then watch if the CD spins or tries to spin. If so the board seems to work unless a test is taken on the main board but the possibility of a defective optical head can be the suspected fault.
If any of the above seems otherwise we must recheck with possibilities of a malfunction of the main processor board

Aug 08, 2011 | JVC Audio Players & Recorders

1 Answer

my cd changer wont play the cd.. it works meaning it seems to be spinning around but just suddenly says check disk. help !! i need music to drive !!! thanks


In most cases when the CD does not play it is possible that the optical head is a suspect. Sometimes it might pick up ordinary audio CD but will not play other formats. This indicates that the optical head is weak and so there is no detection or scanning of the CD . If the optical is working the tracks will be read immediately but with no scanning the laser head can be defective.
Sometimes certain cleaner disks will not be tracked to run for cleaning as it will not be read and so will reject. Hence it is ideal to manually clean the laser head eye using a cleaning swap /cotton bud with gentle pressure on the lens eye.

Jul 23, 2011 | 2002 Jaguar S-Type

2 Answers

I have a dvd player built into my tv and until a few weeks ago worked fine. Now when I put a dvd in it tries reading it, i can hear it spin, then after a few minutes stops and says "incorrect disc." How do i get it to read them?


In most cases when the CD does not play it is possible that the optical head is a suspect. Sometimes it might pick up ordinary audio CD but will not play other formats. This indicates that the optical head is weak and so there is no detection or scanning of the CD . If the optical is working the tracks will be read immediately but with no scanning the laser head can be defective.

The main motor will not work in some cases as unless the tracks are read the drive motor will not work with signal from the processor.
Sometimes certain cleaner disks will not be tracked to run for cleaning as it will not be read and so will reject. Hence it is ideal to manually clean the laser head eye using a cleaning swap /cotton bud with gentle pressure on the lens eye.
If there is no result then watch if the CD spins or tries to spin. If so the board seems to work unless a test is taken on the main board but the possibility of a defective optical head can be the suspected fault.
If any of the above seems otherwise we must recheck with possibilities of a malfunction of the main processor board

Jul 11, 2011 | Sharp Televison & Video

1 Answer

LG DVD PLAYER DP 171 First problem: don't read any dvd, but main motor work. I have changed de laser module, but main motor doesn't work. Before, the main motor work. How is possibile to resolve this ?


In most cases when the CD does not play it is possible that the optical head is a suspect. Sometimes it might pick up ordinary audio CD but will not play other formats. This indicates that the optical head is weak and so there is no detection or scanning of the CD . If the optical is working the tracks will be read immediately but with no scanning the laser head can be defective.

Now since you have changed with a new one ( please make sure that the solder jumper was removed which is for static damage security in the new unit)

The main motor will not work in some cases as unless the tracks are read the drive motor will not work with signal from the processor.
Sometimes certain cleaner disks will not be tracked to run for cleaning as it will not be read and so will reject. Hence it is ideal to manually clean the laser head eye using a cleaning swap /cotton bud with gentle pressure on the lens eye.
If there is no result then watch if the CD spins or tries to spin. If so the board seems to work unless a test is taken on the main board but the possibility of a defective optical head can be the suspected fault.
If any of the above seems otherwise we must recheck with possibilities of a malfunction of the main processor board

Jul 07, 2011 | LG DP-171 7 in. Portable DVD Player

1 Answer

when i turn my playstation on it doesn't read the disc.


In most cases when the CD does not play it is possible that the optical head is a suspect. Sometimes it might pick up ordinary audio CD but will not play other formats. This indicates that the optical head is weak and so there is no detection or scanning of the CD . If the optical is working the tracks will be read immediately but with no scanning the laser head can be defective.
Sometimes certain cleaner disks will not be tracked to run for cleaning as it will not be read and so will reject. Hence it is ideal to manually clean the laser head eye using a cleaning swap /cotton bud with gentle pressure on the lens eye.

Apr 08, 2011 | Sony Playstation 3 (PS3) Console

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