CD player whine fix?

[iamdjdz]

Hi guys,

My CD player (Pioneer PD M602) 6-CD cartridge changer has started to make a constant high-pitched whining noise throughout CD playback. It is audible at low volume - itself at a continuous volume whatever the CD output volume is. As yet I have had no difficulty playing any CDs, CDR/RWs, whether during song playback or 'loading'. I haven't taken the CD player apart yet, but I will probably and clean it with servisol and pressurised air. It's a 17 year old separate system (only have the CD player) but it's never been mistreated, apart from overuse lol.

Anyway does anyone have any idea what might be causing the problem, and any possible fixes that I could do? I have a feeling it's going to be a problem with the servo motor, but it still spins up to speed so I'm not sure. Also the cartridge loading system means that CDs are loaded upside down - and thus the laser mechanism is upside down (probably greatly extending the life of the player), and may be more fiddly to work at.

Cheers anyway

 

[Sinopa]

So the whining noise is coming from the player itself? Just checking because if so, then of course its volume independent of the amp volume.

Does the pitch change as the disc plays? Is it a tone/whistle sort of whine or a hissy sort of whine? If the former and the pitch changes them my guess is the disc motor. If the later then I'd say something is causing the laser focus servo to have to do more work.

I have seen the lens literally drop out of these upside down Pioneer lasers. About 3 or 4 times over the years I have had to find the detached lens in the players case and re-secure it. Perhaps yours is loose and upsetting the focus. Do not use superglue as it will craze the lens. I found tiny blobs of evo-stik contact adhesive to be safe.

 

[iamdjdz]

Hmm I'll have a look at the lens mate cheers - It doesn't change in pitch or volume and is indeed from the player not the output. Will give that a go and see how it looks/is and what I can do from there. Any other suggestions if I find it's not that?

 

[Sinopa]

I should have been more clear about the possible pitch change. You would not hear the pitch change while the disc is playing. What I should have said is: is there a difference in pitch when playing the first and last tracks on a CD?

I ask this because the motor spins faster at the start of a disc than at the end.