|   Receiver Volume Control Knob dirty?? | Sunscat
Oct 6, 2001 8:29 AM | | Recently, within the last 2 months or so, i've noticed that when i turn up the volume that there is a slight popping noise within my speakers. It's hard to explain but when I described the symptoms to a local a/v dealer, the salesmen said that it had to do with dust getting in the volume control knob. The receiver i have is an older Onkyo TSD575 and is unfortunately not in warranty anymore.
My questions to you guys are, is what this salesmen is saying correct or could be correct and, is there an easy way (DIY perhaps) to alleviate this problem. I've never heard of this before and was kind of skeptical so I leave it up to your hands. I don't want to send it out to find out that it wasn't the problem. Thanks in advance for your help!
Jon |
| re: Receiver Volume Control Knob dirty?? | 4runner58
Oct 6, 2001 9:59 AM | | I had Onkyo gear in the two channel flavor for over 20 years and had to remove the knobs (mine had small allen screws as set screws) and amp cover and blow with those cans of pressurized air the control pods clean. I had problems with the volume knob as you describe as well as the input selector switch. Cleaning them helped. I probably did that two or three times over the life of the unit. I never attributed it to Onkyo directly but now there are two data points. Has anyone had this problem with anything other than Onkyo? |
| This is a very common problem | woodman
Oct 9, 2001 5:35 PM | | Jon:
The salesman was pointing you in the right direction, but the problem is NOT in the "knob" but inside the volume control itself. It is indeed dirt inside the potentiometer (variable resistor also known as a "volume control"). It needs to be cleaned - a job that you can do yourself with a little bit of luck (or patience or determination or all of the above). You'll need a can of "contact cleaner", which you can buy at any RadioShack or other electronics store that sells parts. Once you open the unit up, check the volume control for (hopefully) an opening in the shell of the control into which you can spray some of the cleaner. Then, rapidly rotate the control. You might have to do this more than once depending upon the construction of the control, and how well you can get some of the cleaner inside.
This should solve your problem.
woodman
P.S. Since some such controls are nearly sealed units with no opening to spray cleaner into, I'd recommend that you investigate this before buying the contact cleaner. If the control won't allow you to clean it, the only alternative is to replace the control. The latter might be a difficult challenge due to the age of the receiver. |
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