Tip & How-To about Creative Labs DeskTop Theater DTT2500 Computer Speakers

Scratchy sounding volume controls?

If you have a scratchy sounding volume control or your channels cut in and out when adjusting the volume you are most likely suffering from a dirty potentiometer (volume knob) Fully disassemble your DTT2500 unit and liberally spray electronics cleaner in every party of the volume knob (and the other knobs as well). Let fully dry before reassembling.


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Volume switch on Panasonic radio has scratchy static sounds


Sounds like oxidized contacts.
If volume is a turn-knob, then wiper-track (inside potentiometer) is worn.
If it's a PTM (push-to-make) standard button, the button contacts may be dusty/dirty/oxidized.
Suggest you:
buy a contact cleaner such as Servisol,
open case,
identify controls
and squirt liberally to wash out any gunk.
Move/press/wiggle scratchy one to help 'scrub' the contacts clean.
If this doesn't help try have control replaced.

Oct 11, 2017 | Panasonic Radio Communications

1 Answer

On clean channel when 'channel volume' is adjusted, the sound cuts out, goes completely dead. I have to switch to another channel and back again or switch off and back on. The amp seems to get confused!


When it is working, wiggle the channel volume control WITHOUT rotating. If the sound cuts out, likely the soldering of the pot leads is broken where it attaches to the board. Try resoldering the connections.

SOMETIMES the control is damaged in which case it must be replaced.

Aug 30, 2010 | Line 6 Spider Iii 15 Modeling Guitar...

1 Answer

Audio is very scratchy/static


If it makes a scratchy sound when the volume is turned up and down then the carbon contacts on the volume control are most likely the culprit you can attempt to clean them with rubbing alchol and a Q-tip.

Jan 17, 2010 | Midland F-12 (14 Channels) 2-Way Radio

1 Answer

sony TA-540E TWIN DRIVE AMPLIFIER


Hi Jimbob. Sounds like you have dirty/dry controls/switches. The contact lubricant dries out on them producing intermittent and scratchiness when you operate them. Clean any offending controls or signal switches with CRC2-26 by squirting(to flood then internals) each control/switch. you will have to do this from the inside of the amp. You may also have a dirty speaker protection relay, sound may return to a dead channel when you turn the vol up points to that. Good Luck. If you need more info feel free to get back to me here. Happy to talk you through more if you cant sort it out.

regards
Graeme

Mar 22, 2008 | Sony TA-FE370 2-Channel Amplifier

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