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Conference hips::uk_audioo

Title:You get surface noise in real life too
Notice:Let's be conformist
Moderator:GOVT02::BARKER
Created:Thu Jul 28 1988
Last Modified:Mon Jun 02 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:550
Total number of notes:3847

224.0. "Noisy CD Player " by PEKING::GERRYT () Wed Nov 07 1990 16:54

    I have a noisy CD Player.
    It sounds like the disc catches as it spins around.
    Has anyone else had this problem, and can it be fixed ? (Easily eg.
    WD40!?)
    Also, are some players more susceptible than others because of their
    design or build quality ?
    
    Thanks,
    
    Tim
T.RTitleUserPersonal
Name		DateLines
224.1WIKKIT::WARWICKTrevor WarwickWed Nov 07 1990 17:419
    
    Was it always like that or has it recently got worse ? My Philips
    player makes a sort of hissing/shuffling noise as the disc spins, which
    I have learnt to ignore. A friend's Sony player of similar vintage was
    *much* more noisy - I found it really objectionable.
    
    The newer Philips I borrowed recently was almost silent.
    
    Trevor
224.2Gets worse as it playsPEKING::GERRYTThu Nov 08 1990 10:368
    The noise gets worse as tracks furhter into the recording are
    played..which in the case of a CD means those more towards the
    perimeter of the disc (outside edge) ie. tracks 1-3 play silently,
    whereas tracks 5-10 are noisy.
    It's definitely a mechanical noise, and is distracting to say the
    least!
    
    tim
224.3Naff design ?PEKING::GERRYTTue Nov 13 1990 12:3623
    As the machine is out of warranty (Ferguson early model) I took the
    covers off, and it looks to be made by SONY for them.
    
    I have isolated the problem.
    When the CD goes into the machine (front loading drawer), a plastic
    arm descends over the disc, which incorporates a sort of flywheel
    device that sits over the drive spindle which protrudes through the
    centre of the disc.
    The arm is controlled by a spring at the back, and of course this 
    is not centralised, and causes the arm to 'pull' slightly to one side,
    and exert pressure on the plastic pivots either side of the arm.
    The 'flywheel' device is made of metal, and sits in a hole in the plastic
    arm, obviously with some 'play' for locating on the spindle.
    The 'pull' of the spring off-centre causes the plastic arm to 'snag'
    the flywheel device on one side, causing the scraping noise!   
    To me it seems like a pretty stupid design if keeping the whole thing
    in parallel is important.
    
    Would it be wise to WD40 the spindle area (making sure the spray
    doesn't get onto the lazer), or what advice can you give?
    
    Tim
224.4PEKING::GERRYTTue Dec 18 1990 16:497
    Took it to bits again, and dismantled the counterbalance mechanism on
    the arm. found the motor spindle not to be upright, so rammed a piece
    of paper on the rear of the frame to straighten it up (plastic frame of
    course) and it seems to have done the trick...no tracking errors or
    mechanical noise now.
    
    Tim