Question about Sony CDP-CX400 400-Disc CD Changer

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Lens Knocking Against The CD - All CDs skip or diginoise then fail.

I purchased a CDP-CX400 a month ago. It worked fine for about 3 weeks. Now, every CD skips. I used both a CD Lens Cleaning Disc, as well as taken the machine apart and manually cleaned the lens to no avail. In an attempt to trouble shoot, I watched it load a CD and attempt to play it. The Lens is 'knocking' against the CD surface repeatedly. Sometimes the disc will start to play and then stutter or begin skipping.. occasionally it will play the CD with lots of digital noise. HELP! I got it for cheap on Craig's List and it worked beautifully for 3 weeks before this started happening.

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Re: Lens Knocking Against The CD - All CDs skip or...

Take the small back cover off and take some electrical grade contact cleaner and spray all around the lens area, that worked for me.


Posted on Feb 10, 2009

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I have a Sony CDP-CX400 that has a flashing blue light.

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are there scratches on the disks if so i recomend replacement but the lens might be dirty if so you can go to a local walmart and purchase a cd/dvd cleaner and i have provided a link

Jan 02, 2011 | Sony CDP-CX400 400-Disc CD Changer

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It is clear symptoms of bad optical laser or dirty optical lens.
Please put lens cleaning CD in player, play that CD to clean dust on optical lens surface. If that helps, fine or replace optical laser block in player.
I can provide you optical lens part number, please confirm is it Sony CDP-CX153 cd player or any other model.

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Ok, this is optical lens assembly failure. the lens assembly is a whole device that runs on a rail with rail motor. the spin motor is also attached to this Assembly as well. the entire assembly will need to be replace due to the damage that has occurred.

Replacing the optical lens assembly will fix all the issues you stated.

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Hi there, this lens may be dirty or it may have a thin layer of heat film that is causing it to not read in a consistent manner. i would try to clean the lens with a good CD lens cleaner. if the cleansing doesn't restore the lens to its original reading state, this will confirm lens assembly failure and you will need to replace this assembly.

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Pull the small back cover off and Purchase a can of CRC Electrical Grade Contact Cleaner, un plug the unit all around the len board and the whole genral area that should take care of the problem! it did for me.


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