Question about Audio Shelf Systems
Cd auto changer reciever. have had 5 years or so but hardly used. Volume started to independently/ spontaneously increase rapidly to max volume today when on moderate volume setting. Turned unit off. When turned on again, the same happened. Pattern repeated again a third time after having played normaly for 10 minutes or so. Any explanations and, ideally, solutions? Same problem here with my Denon UDM50 - occasionally the volume control increases wildly / fluctuates when turning the knob anticlockwise. Remote control volume unaffected. Occasionally one speaker side cuts out - I believe this to be a related issue. Also interestingly, we had a carpenter in to fix our windows and he said he has a similar TEAC unit (same unit, different fascia???) with exactly the same issue. Would be interested if anyone has successfully found a solution to this....!
SOURCE: volume knob
In other words the lever that the front knob is attached to is broken or the microswitch is bad or broken.. if your not a tech please take the unit in to a shop as there are no user serviceable parts inside these units. Good Luck
Posted on Aug 03, 2006
SOURCE: Power cuts out
This problem happend to my sony system about a year ago. It was the amp that blew in mine because of the fan inside the system was not coming on when it should of. I found that when i had put my PC in the AUX jacks it blew the fan on me, so every time the volume got to 15 the system would just shut down and not come back on at all, or it would need time to cool down before it would start up again. Take it to a shop and get it looked at by someone that knows what there doing. Please dont try and do this yourself.
Posted on Aug 16, 2006
It definitely sounds like it took a surge. yhe Power Amop IC in those things are pretty sensitive. Any decent repair shop should be able to repair it for under $125.
Posted on Sep 18, 2007
If you are still having the same problem with your denon UD-M50 I might be able to help. I have fixed a number of them in the past and have the necessary maintenance manual and knowledge of a company that can supply spare parts. Disassembly looks very complex, especially when the problem is with the carousel but once you have an understanding of the mechanism it's not that difficult. Care should be taken when manually removing and reloading the disc trays as damage can result to the 'Teeth' alongside each. Spare trays are available. All my repairs involved the removal of the carousel mechanism in order to align the trays. I can copy the relevant sections of the manual dealing with the re-alignment which is critical but again if followed exactly you should have no trouble. If you respond with an Email address, I will be only too pleased to forward you the schematics etc.
Posted on Dec 15, 2007
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