Question about Sony CFD-ZW755 Radio/Cassette/CD Boombox

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CD PLAYER My Cd player turntable spins(sometimes. I only know if I lift the top and it's slowing down), there is sound coming from my speakers when the radio is on, but the CD player keeps saying "no disk". The platter(assuming that the top thingie underneath the lid)does seem to to be able to be pushed up. It only drops back down. Lastly, on the LCD screen(that you read to change tracks and show the megabass option) there's the word "sound" in very small letters. How can I get this CD player to play(read) and put out sound so I can listen to my CDs. I have done a lens cleaning with the Maxwell CD-340 Lens cleaner/w advanced angle brush. Thank you for your help.

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SOURCE: the platter

Hi The platter is the "thingy" that the Cd sits on, and should be firmly attached to the spin motor, which spins the Cd. If that is loose, you must have it repaired at a shop, because the platter height is a factory adjustment, and the laser cannot focus on the disk if it is too far away, or too close to the lense, and it is a delicate adjustment requiring experience & special tools. It is not difficult if you have the tools, so your local repair shop may be able to repair it for a reasonable price. Hopr this helps, good luck!

Posted on May 02, 2007

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I have 2 boom boxes where cd's spin but no sound.

Its probably a lens failure, its quite common, try cleaning the lens,

if all else fails, try turning the unit upside down and load the disc, sometime this for some reason - resets the lens if slighty out but its not fact, just something i heard

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Rhe repair work depends on the dianosis. Sometimes you simply can't det parts for old CD players.
So, if you know about CD repair, start by dismounting your playes and then you'll know how to repair it.

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The CD player is no longer working. Not sensing it.

buy a cleaning disk, or get a micro fiber cloth, and take the stereo apart and find the laser lens, near the motor that spins the cd, it will be pretty small, gently wipe it clean in one direction, if that doesnt work, the laser has quit working.

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CD player says "no disk" when there is disk in player.

Get a CD Cleaner and check your electric current output to make sure it matches the voltage requirement.

If the CD Cleaner doesnt work, then replace your CD Lens

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1 Answer

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There is usually a cotter pin at the center of the platter around the spindle base. This can be removed with a screw driver using a twisting motion. There is a blades worth of space between the clip and the spindle base. Screw driver should be in vertical position. Sometimes the vinyl slip mat must be removed first. Watch that clip, cause it can go flyin. Once the clip is removed, the turntable should let go easily.

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There is an inherent problem with this unit that is not the reader. I noticed that the red light which comes on when the super base is activated will sometimes flash while the unit is first trying to read the CD. It seems to be in sync with the disc spinning motor of the CD player. I have repaired a couple of these by checking and resoldering poor quality solder joints on the CD sub board and a few on the main circuit board. But this has not repaired all of them. Sony need to look into this.

Aug 23, 2008 | Boomboxes

1 Answer

How to get in to clean the lens for RP-9316 Boombox

I had the same issue. Over time, the cd player quit palying at all. The unit would try to read the cd but couldn't and then skip to the next cd.
- I took fairlane's advice and put a cd in and listened for the ticking sound to indicate that the laser was trying to read the cd. I also looked inside through the top "vent" area to be sure the cd was actually spinning. It was spinning and I heard what I thought I was "ticking" sound so I guessed that the laser needed to be cleaned.
- I took off the 6 side panel screws on the right side of the entire unit and loosened the screw on the backside off the unit about halfway down from the top that also held the side panel on.
- I then removed the side panel.
- I then removed the 2 screws on the top side of the other side panel and the screw in the top center back of the top panel and was able to remove the top cover that is over the unit. The top cover is "pressure fitted" in so be careful as you try to remove it, using a little wiggle at a time, but it does comes off.
- Once you have the top off, there is a screw in the center of the plate that holds the tray for the cd's. Remove the screw and you will able to lift and spin the tray to have clear access to the laser
that needs to be cleaned. (Note the position of the numbers on the tray so you put it back the right way.)
- The laser is a little "glassy" looking thing about the size of the head of the q-tip.
- I used the q-tip with 70% isopropol alcohol and rubbed it over and around the laser as best I could. I repeated the procedure 2-3 times and the used compressed air to dry it off.
- I put everything back in place in the reverse order I took it off, based on what's in the above steps.
- Remember, the top will fit in with pressure so don't get anxious as you try to get it in the right position.
The cd's actually play again.
I hope this will help someone.

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1 Answer

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This might not be a problem with your CD player but with your CD. To check this, if it's easy for you, make a copy of your CD and try it. If the problem is fixed then it was a problem with your CD. If it's not fixed then the problem is with your CD player. Maybe the CD lens needs to be changed or be calibrated by a service technician.

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10 Answers

CD player not working

NO NO NO NO NO NO dont be sticking a screw driver where you dont know where its going!!!! Theres no belt under the turntable as its a direct drive motor. It the platter dosent turn then that means that the laser is not focusing on the disc. This could a combination of five differant things. First is a simple one as the lens may need cleaning. Try first by using a good lens cleaning disc. Second make sure the slider that the lens is attached to is all the way back to the platter as sometimes there is a small belt that drives the slider assy via a worm gear and that belt goes bad alot as the worm gear i've seen get gunked up with air and dirt. Third is the platter its self . It may have slipped down to close to the lens and it wont focus. Forth could be the motor drive curcuit is defective . Coulkd be a bad motor control ic or the b+ going to the curcuit. and finally but not least could be a bad laser assy. If this is bad you might as well buy a new unit unless you can install one your self but be warned if you do you will need to alighn the new PU assy for tracking and focus gains as well as rf azmuth and laser power. Good luck I hope this put a little lite on the subject for ya.

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