Question about Technics Audio & Video Receivers

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Re my Technics CD Changer SL - MC3: This unit has provided yeoman service for many years without problem but now has started to act up. After about 45 to 60 minutes of playing on full random mode, discs start skipping. It doesnèt seem to matter which disc is in place. I have cleaned the lense with one of the CD-type cleaners to no apparent improvement. Any ideas. If I have tolet the unit die a graceful death, do you have any suggestions for a replacement Many thanks Gerry Lisk

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  • Master
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Hi and welcome to FixYa,

Initially, your concern could be a failing laser eye. Considering the years of service and the cost of repair plus the downtime, it may really be to your advantage to consider a replacement. Since You have had good experience with Technics, might as well select from the latest models.

Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 07, 2008

  • Louie  Role
    Louie Role Dec 07, 2008

    It may also be worth your while to check on the small shafting that
    guides the carriage of the laser pickup. Dirt, grome, dust and
    solidified lubricant can cause stoppage of the carriage and the laser
    eye then fails to read the next track. Please refer to the image i have attached.



  • Louie  Role
    Louie Role Dec 12, 2008

    Hi again,



    Any updates or developments so far?



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  • Master
  • 1,239 Answers

HI
I've seen many times before where the spindle table ( the piece that the CD 
rests on and spins) will move. If the voltage to the focus coil of the 
laser ***'y is greater than 1 volt then this may be the case. Moving the 
table will change this voltage.

Posted on Dec 07, 2008

  • ABHISHEK.C
    ABHISHEK.C Dec 07, 2008

    Quite possible that routine maintenance would cure the skipping problem. 
     re-lubing the gears and slider surfaces, a bit of 
    light oil at the spindle shaft, etc. 



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  • Master
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Hi,

see if the player tries to read the disc. Load a disc and listen.
Does the player make squealing noises or is it totally quiet? Squealing noises may indicate that the player is trying to synchronize with the disc but can't due to an obstruction on the lens or in the laser path inside the pickup or a defect in the pickup. This can also be caused by an intermittent signal problem due to a faulty ribbon cable.

Totally silent means that the photo sensor is not getting any usable input from the laser at all, meaning that the pickup is "blind" for lack of a better word.
This can be caused by an obstruction of the beam by foreign matter on the lens or inside the pickup all the way to a marginal or failed laser diode and/or photosensor array. This can also be caused by a bad ribbon cable with one or more severed traces.

You could try to clean the optics. This is the most common malfunction as far as i know in all disc players. It would involve taking the cover off and finding a way to expose the lense, and then cleaning it with a very gentle brush. some players have a cover for the lense that swings to the side during playing, this greatly reduces the chance of dust accumulating, but its still worth the try.

If you actually see dust on the lense, then its just that simple. clean, close, play.


It may also be worth your while to check on the small shafting that guides the carriage of the laser pickup. Dirt, grome, dust and solidified lubricant can cause stoppage of the carriage and the laser eye then fails to read the next track. Please refer to the image i have attached.

Re my Technics CD Changer - 5a29073.jpg

Posted on Dec 07, 2008

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  • Master
  • 2,110 Answers

Your Lens might have some problem...So it is better to replace the lens with a new one...

Posted on Dec 07, 2008

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Clean the lens with a q tip and alcohol. those disk cleaners are junk. it should help take care of the problem and it should allow your cds to play again. dont give up hope yet... ron

Posted on Dec 07, 2008

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