lightengine Posted August 1, 2014 Share Posted August 1, 2014 Does anyone know why my cd player on my integrated sound system starts to sound like incoming distant helicopters after it has been playing for some time? Link to post Share on other sites More sharing options...
RMweb Premium kevinlms Posted August 2, 2014 RMweb Premium Share Posted August 2, 2014 Does anyone know why my cd player on my integrated sound system starts to sound like incoming distant helicopters after it has been playing for some time? Does the same CD play OK on another device - the PC? Link to post Share on other sites More sharing options...
trisonic Posted August 2, 2014 Share Posted August 2, 2014 If you hear no music at all only choppers then suspect the D/A converter. They often go south in reasonably priced systems. Best, Pete. Link to post Share on other sites More sharing options...
lightengine Posted August 2, 2014 Author Share Posted August 2, 2014 The cd disc is ok and plays but after a few tracks the distant helicopter boom boom boom starts. The throbbing is over the music which can still be heard. Does the cd reader eye need cleaning? Link to post Share on other sites More sharing options...
lightengine Posted August 2, 2014 Author Share Posted August 2, 2014 Not got Ride Of The Valkyries playing from the Apocolypse Now soundtrack by any chance? It is far more realistic than the soundtrack! Link to post Share on other sites More sharing options...
lightengine Posted August 2, 2014 Author Share Posted August 2, 2014 If you hear no music at all only choppers then suspect the D/A converter. They often go south in reasonably priced systems. Best, Pete. D/A converter? Wassat? cheers LE Link to post Share on other sites More sharing options...
RMweb Premium skipepsi Posted August 2, 2014 RMweb Premium Share Posted August 2, 2014 D/A converter? Wassat? cheers LE Digital to audio I think Link to post Share on other sites More sharing options...
Danemouth Posted August 2, 2014 Share Posted August 2, 2014 Digital to audio I think Digital to analogue IIRC, Sorry to seem pedantic, Regards, Daved Link to post Share on other sites More sharing options...
lightengine Posted August 2, 2014 Author Share Posted August 2, 2014 So, to summarise, if I clean the reader and helicopters still buzz, its a clear cut case of abandonment into the nearest skip is it? Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted August 2, 2014 Share Posted August 2, 2014 A rhythmic thumping is usually breakthrough of the reader head tracking drive into the audio output. Applies to all optical disc media: there is no physical tracking keeping the reader aligned with the track, it's done by monitoring signal to noise ratio and keeping it as high as possible. If the disc is not well centred the large corrections to keep on track breaks through. This was very common on the first commercial product, the video laserdisc (remember those anyone, optical discs up to LP size!) and it got the name 'helicoptering'. First thing to check is the disc spindle. A small bit of rubbish here imparting a little eccentricity to the discs is usually the villain. Wouldn't touch the reader head unless it is visibly dusty Link to post Share on other sites More sharing options...
lightengine Posted August 2, 2014 Author Share Posted August 2, 2014 Trouble is its a 3 disc drawer type cd player and not visibly easily accessible. Maybe I can just insert a vacuum and hope for a result. Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted August 2, 2014 Share Posted August 2, 2014 Is the CD player at the top of the stack so there's a chance of getting access to the spindle by taking a top cover off? If you can do that, remember that as this is an integrated unit there may be a fair charge on the amp smoothing capacitors, so be careful not to touch any wiring. As already mentioned, this can be down to electronic component degradation, and that is not economically repairable. Link to post Share on other sites More sharing options...
trisonic Posted August 3, 2014 Share Posted August 3, 2014 Unfortunately unless you spend big bucks (and that is no guarantee) the components cost in pence. "Digital to Analogue Converter” the most crucial part of any CD system yet often where the manufacture cut costs citing: “It either works or it doesn’t, innit?" Good luck with the vacuuming... Best, Pete. Link to post Share on other sites More sharing options...
lightengine Posted August 3, 2014 Author Share Posted August 3, 2014 Unfortunately unless you spend big bucks (and that is no guarantee) the components cost in pence. "Digital to Analogue Converter” the most crucial part of any CD system yet often where the manufacture cut costs citing: “It either works or it doesn’t, innit?" Good luck with the vacuuming... Best, Pete. Cheers Pete Vacuuming failed miserably. Next step will be a trusty slap. It used to work on the rolling tv image. Regards Pete Link to post Share on other sites More sharing options...
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