Question about Aiwa Audio Players & Recorders
Probably something else.
The buzzing is typical of an open circuit input "receiving" radiated 50/60 Hz from nearby mains wiring.
An alternative source of buzzing is the 50/60 Hz mains breaking through into the audio due to failed smoothing and filtering in the power supply.
Capacitors that have been unused for quite a while can lose condition and fail when put into use again and this might have been the cause of the thump/thud/boom you noted.
I doubt it is the cause but it is very unwise to operate an amplifier without a full complement of speakers unless the volume is kept at minimum...
Posted on Nov 17, 2020
This can be caused due to an increase in local interference. The hum is decreased when you plug in the satellites because the interference is spread over a longer area. You may notice that speakers tend to hum around things like cell phones and power outlets. To see if this is the case, move the speakers to another part of the room if you can, slide the desk around, plug the computer in at another room, something like this. If the hum gets louder or quieter, it is interference at your new place. This can be solved by finding a new area to set up your computer stuff at. Since it's mostly the subwoofer, try elevating it off the ground, there may be a power main running under the floor.
Posted on Sep 04, 2007
SOURCE: AIWA AV-D58 RECEIVER
We found that the protector came on and we searched for a solution, however we could not find anything that fixed it. Finally we found that some of the wires for one of our speakers were touching and adjusting those wires solved the problem.
Posted on Apr 22, 2008
If I remember this model correctly, there is only 1 direct input. The remainder of the inputs are bufferred through a switching IC. It is likely that this IC is defective. Are there any other symptoms at all?
Posted on Mar 13, 2009
SOURCE: AIWA AV-D58 receiver ECO problem
Hi, I've found the problem. There was a closure in the Sorround Amlifier, and the protect circuit stopped the whole receiver. Br., csdombi
Posted on Jan 07, 2010
It sounds like you are describing an earth loop problem. I won't go into detail in this post, but try an isolation test first. disconnect everything from the reciever except the sub and try connecting say a BATTERY powered mp3 player or cd player to minimise connections to the electrical mains earth. you could also isolate things by taking your sub to a friend's house and trying it on their system.
If it is an earth loop use a process of elimination to find out which two pieces of equipment causes the earth loop. then apply filtering.
you can buy earth loop isolation transformers for about AU$26 and I've used one on my sub myself. Theyhave RCA (phono)plugs on each end and they connect inline with the signal cable to the sub amp.
as for the thumping sound it might be the speaker protection circuitry cutting off the amp to protect the subwoofer speaker from damaged. This might be triggered if the earth loop sound is causing the sub amp to overload and clip.
Failing this there might be a dried out overheated electro capacitor in the amp circuit causing the hum. Hav a chat to your local electronics person, who should be able to spot it!
Hope this puts you on the right track
Posted on Jan 07, 2010
Testimonial: "Thank you for your explanation of the possible causes for this error. I will investigate with the methods you suggested! :-)"
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