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Distortion from CD Player?, Please help.

Discussion in 'Digital Sources' started by VIKRAM PAUL, Nov 4, 2018.

  1. VIKRAM PAUL

    VIKRAM PAUL New Member

    Messages:
    17
    Hi Guys,

    Recently i got a vintage cd player and tuner(Grundig Fine Arts CD9000 and T9000, its unused kept in Grundig factory sealed( Old Stock) with company stamp Germany. I got it for good deal around 300 euros both.

    When i received i was like WTH.. two vintage beauties with those shiny looks.
    [​IMG]
    [​IMG]

    1st i tried playing the tuner 100 % perfectly working with good sound.
    2nd i tried the cd player, i was shocked to see it was not reading any cd
    See the attached the video Error was like ‘DISC’





    I contacted the seller they were sure the cd player worked very well b4 packing.
    Even they were confused , later they suggested to open the top cover of the cd player
    and check the alignment if possible set the laser current and bias till it reads.


    Personally i never touched any cd player or had repair knowledge.
    I showed this to my friend who had bit knowledge of cd player , when he opened the box he was shocked to see the board cos it looked so new untouched. he was amazed how they preserved the 30 year old cd player without any dust. later even he was scared to touch it.

    I just left the cd player on with cd in , like after 2 hours it showed me the tracks and i pressed play
    It was like WOOOOOOOO….W and sounded awesome.
    See the attached video


    I played nearly 3 to 4 cds without any glitch. later i noticed that few cds which i played before had

    distortion sound from speaker not from cd player, i notice such sounds random tracks and or some times played smoothly. I also confirmed the distortion is not from amplifier or interconnects or speaker cause i used headphones directly from cd player.

    See the attached video.



    I don’t use CDR only original which are new and well recorded. friend said it must be laser problem or dying . Seller says if its laser problem it won’t read at all or it would say ‘NO DISC’ or it won’t spin.

    Anyways seller felt bad and refunded me 200 euros which made me feel that he never intended to cheat or fool me.

    Do you guys have any idea how to solve this , who is the culprit. Laser, or any capacitor or alignment????
     

     

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  2. Djcoolray

    Djcoolray Addicted Member

    Messages:
    6,441
    Location:
    A rocks throw from JBLM !!!!
    That’s called breaking in a new CD player....

    Not everyone believes in the necessity of breaking in a new CD player and many have returned a new player because of their belief. I never turn my CD player off because of how much better it sounds if I don’t.

    In a week it will sound even better....so just leave it on and don’t shut it off. Plus, every time you turn it on and off it goes back and forth from being hot to cold which in the long run....year after year making the circuits brittle degrading the sound quality.
     
  3. VIKRAM PAUL

    VIKRAM PAUL New Member

    Messages:
    17

    you mean to say the distortion will go away if i keep it on or burn in ?
     
    Djcoolray likes this.
  4. Djcoolray

    Djcoolray Addicted Member

    Messages:
    6,441
    Location:
    A rocks throw from JBLM !!!!
    Yep....

    Time is on your side !!

    It’s just new circuits breaking in.....

    Optional performance of the circuits requires a certain temperature after breakin also and why I never shut my CD player off.
     
    VIKRAM PAUL likes this.
  5. VIKRAM PAUL

    VIKRAM PAUL New Member

    Messages:
    17

    Ok can i continuously keep playing the cd even if its distorting sound ? or play when its normal sounding or just keep it on for 1 week and then play ?
     
  6. Djcoolray

    Djcoolray Addicted Member

    Messages:
    6,441
    Location:
    A rocks throw from JBLM !!!!
    Just leave your CD player on while playing a CD and use the repeat function for the CD to continually play. That is if you have that function...
     
    VIKRAM PAUL likes this.

     

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  7. JP

    JP 7480 74111110101115

    Messages:
    2,521
    Location:
    NYC and Brookfield, CT
    That’s called broken. Sounds like read errors are causing the muting concealment to kick in. May get better with some use (geled lube, reforming caps), may get worse, or may get better for a little while before it dies.

    Upping the current can get a tired laser working for a very short while until the excess current burns it out. Disturbing advise.
     
    duncan and VIKRAM PAUL like this.
  8. steerpike2

    steerpike2 Super Member

    Messages:
    3,332
    Location:
    Transvaal, South Africa
    Being a Grundig it will have blue Philips electrolytic capacitors in it. These age badly, they need to be replaced. When old and leaky the cause distortion and tracking problems.
     
    cpt_paranoia and VIKRAM PAUL like this.
  9. VIKRAM PAUL

    VIKRAM PAUL New Member

    Messages:
    17
    yeah one of the technician said the same it may be capacitor problem but he asked to use it for 1 week continues to see if it solves by own if not we need ot change it .
     
  10. 50nstillhifi

    50nstillhifi Super Member

    Messages:
    1,076
    Location:
    Carolinas
    You may be able to fix this with a good lens cleaner.. and a minor tracking adjustment.

    YouTube the procedure.. it really is quite easy to do! :thumbsup:
     

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