Sony CDP-CX450 400-Disc CD Changer Logo

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Bruce Turbow Posted on Sep 18, 2016
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I recently replaced the 2 belts that move the table assembly. The loader picks the disc and loads it to the player. The player does not spin the disc, so no music. Any suggestions?

My CDP-CX450 has served me well since June 2002. Its been out of sorts recently. I replaced the 2 belts that move the table. The loader picks the disc and loads it to the player. The player does not spin the disc, so no music. Any suggestions?

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Steve K

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  • Sony Master 1,054 Answers
  • Posted on Sep 20, 2016
Steve K
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Does the laser move and try to focus once the disk in loaded?

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0helpful
1answer

CDP-CX400, turns slowly, displays 'Loading Error'. Disc DOES load but does NOT SPIN. Looks like the drive belts might be slipping. Do the drive belts spin the CD as well as turning the table?

It could be that the lens is dirty so can't see the disc. Generally a motor turns the CD direct. Though things like switches or damage to the mechanism can affect the motor's operation.
Drive belts might move the carriage up and down. You can tell if a belt is worn by looking at it. Plus there might be black dirt on the surfaces it comes into contact with.
But try cleaning the lens first, you can also look to see if it has scratches on the lens. That will cause it never to read another CD again.
0helpful
1answer

CDP cx355 cd doesn't spin

You can clean the lens with a small amount of windex and put a little oil like 3 and 1 oil on the spindle motor shaft and on the sled rails. Good luck !
1helpful
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Cd player indicates Table Error

The belt in the back of the player under the hood is either broke or has came off the rollers. You will need to take the top off and replace the belt a rubber band will work as a temporary fix till you can order a new belt.
0helpful
2answers

Table Error

After replacing belts, turntable moves to position disc 1 in front of loader then swings back and forth 10 times and posts "TABLE ERROR" again. If I apply slight clockwise pressure to table, then disc loads OK. On unload, table rotates to position disc 1 in front, door opens, then table oscillates another 10 times and posts "TABLE ERROR" again. Any hints?
1helpful
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8helpful
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Will not eject

The problem here is most likely a slipping load belt.

What is happening is that when a disc is loaded, the final stage of the loading sequence causes a magnetic "clamper" to clamp the disk to the CD table. The CD table is the part attached to a motor that spins the disk, If the belt has become slippery ( due to age and heat), there won't be enough grip to break the clamper grip and the disk won't be ejected. To fix this, you must dis-assemble the unit and remove the disc by hand. Then you replace the belt and you are all set. These wave radios are tricky to open if you have not done one before and because of that, this is really not a DIY repair. The belt costs around $5

Hope this helps,

Dan
0helpful
1answer

When I put a DVD in, it stays on loading for a few minutes and then it says -no disc. I can not use the DVD player. It is a 32" HD Widescreen LCD TV/DVD Combo...TDA-03211C. Thanks.

With the dvd loaders in these particular units the laser tends to fault in them relatively fast. Replace the laser loader assembly, which is the entire assembly containing the laser, the mechanism where the disc slides in and out as well as the small motor that spins the disc. Good Luck.
2helpful
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Spindel problem?

my problem is that the turn table keeps turning and it not playing the disk
1helpful
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3 yr Old CD Player not recognizing discs

Laser might not be faulty but just a dirty lens/ rail assembly.
If thou darest open the thing, clean the lens ( GENTLY) with a swab of glass lens cleaner. Clean the chrome runners for the optics assby with a swab lcaed with WD40 or silicone.
3helpful
1answer

WILL NOT LOAD DVD OR CD

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;

Regards,
VOTIT

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