Question about Sony Audio Players & Recorders

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Compact Hi-Fi stereo system plays fine on some disks, won't play at all on others. The problem doesn't seem to be the disks, but is somehow connected to the slot the disk is in. When the disk is is set to play there is a grating sound as if the cd is being rubbed against something. My first indication that there was a problem was that when set on shuffle it seemed to be hitting the same songs over and over with a long pause between songs.

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  • skclaytor Jan 10, 2009

    This is a "50 plus 1" cd changer. Does that change your diagnosis?

  • skclaytor Jan 10, 2009

    These are store-bought professionally recorded disks that used to play beautifully.--not something that I burned myself

  • skclaytor Jan 10, 2009

    On the rear of the unit it has HCD-M300AV serial # 8209464. On the box it came in was MHCM300AV.

  • skclaytor Jan 10, 2009

    These cds played before and play fine in the car. The problem is with specific slots in the changer. For example: A cd will play fine in slot #12 but if I move it to slot# 2- it doesn't seem to know it's there.

  • skclaytor Jan 11, 2009

    I've run a lens cleaner before without seeing any improvement. But I will run it a few more times and see if it helps.

  • skclaytor Jan 11, 2009

    Whoa! we're getting more confused than I was when I started. Where did the advice regarding Blu Ray disk come from??--this is just a problem with my stereo system. I'm not doing anything with anything new. It's been suggested that I need to run a lens cleaner. I got one from Fry's several months ago and gave it a try. I have checked on the case that I ran it 4 times. HOWEVER now I can't get the player to "see" it. I've tried it in several slots. Sometimes it just searches for the disk and then moves on to the next one and other times it shows the disk # followed by track # 7 with (I believe) 22.34 minutes. Does that mean anything?

  • skclaytor Jan 11, 2009

    If I take it to be serviced,can someone recommed a place to take it in the Redding, CA area?

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11 Answers

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My stereo cd changer used to do this i tapped it lightly on a table to get it alligned again and it works sometimes and will play movies and cds but others it wont sonys number is 1800-345-7669 if you need them to try to help you service the project i hope this helps you

Posted on Jan 11, 2009

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Welcome-
here is a website for the repair compnays in your area:
http://www.yellowbook.com/search/?what=electronics+repair&who=&where=Redding%2C+CA
thanks
tom

Posted on Jan 11, 2009

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This is a mechanism alignment problem thats skip or jumping the rail.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. If you have knowledge of electronics you better open the unit check out the following ,the belt ,gear and the grease .Must problem comes from the old grease stick hard and accumulated dust,dirt and hair that's wrapped in the gear or in the chrome rail.Its better take out the old grease and replaced with a new grease.So it works fine and smoothly again. But if don't know how to open because of complicated mechanism assembly you better bring this to a electronic shop with proper tools and equipment. Hope it may help you; Regards; VOTIT

Posted on Jan 11, 2009

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  • Sony Master
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That is the spindle table that is not catching the disk.

The spindle table is not clamping on the surface of the disk , and the disk is slipping.

If this only happens with disks that are dirty or have labels on top , it may be normal.

Teh spindle is held by spring or activated by a magnet, if the problem happens too often the mechanism is faulty.

In that case the unit must be taken apart to repair it.

Posted on Jan 11, 2009

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Its time for the device to get serviced as it is playing some and not playinf some.just require cleaning internally.as its allignment is moved internally.and will get reallighned after servicing.

Posted on Jan 10, 2009

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HI
IF THE BLUE RAY DISC IS NOT PLAYING“This Blu-ray Disc is manufactured to the highest quality available. It is possible this Blu-ray Disc was manufactured after your Blu-ray Disc player was released. If that is the case, your player may not support all the features on the disc. In some cases, a firmware or software upgrade to your player may improve playability. To ensure the best possible viewing experience, please consult your hardware manufacturer’s website for the latest firmware or software version and, if an upgrade is available, we suggest that you follow its installation instructions. If you have any questions about this disc or its playability, please contact our consumer enquiries line on…..”

Posted on Jan 10, 2009

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Your cd drive lens needs to be cleaned by a lens cleaner...

Posted on Jan 10, 2009

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  • 59 Answers

Hi it could be just the cd that you are use most of the time the format of the cd are different so they may not play

Posted on Jan 10, 2009

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Hi, Let me know model number of Sony CD Player to help you properly through service manual.

Posted on Jan 10, 2009

  • Shahid Electronics
    Shahid Electronics Jan 11, 2009

    Hi again,
    Your Sony unit just requires service in cd loading mechanism and I hope you can do it easily as its not so complicated mechanism.


    below are 2 exploded view images of cd mechanism, will help you..


     








    And source of info is service manual of related unit.








    You need further help, let me know.
    Thank you.

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  • 716 Answers

Is The Discs Are Burned That Could Be Your Problem Cause Alot Of The Time Burned Disks Are Too Thick For My C.d Player And I Can't Get Them Out Or Play Them.

Posted on Jan 10, 2009

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  • 160 Answers

Two problems either the motor spinning the disk is jammed or its the problem of lens which reads the cd is got dust on it and needs cleaning.

Posted on Jan 10, 2009

  • chapli Jan 10, 2009

    the cd holder that holds the cd while spinning is bit misaligned or bit broken and not holding the cd properly.its a small plastic part which holds the cd from top while its playing.this misaligning cause cd to jump n play from wrong position.the cd does not get fit properly and shakes a lot making that grating sound.just replace the cd top holder to solve the problem.its common problem

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