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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hello everyone
I have a problem with an old Beomaster 1500 tuner/amplifier.
When i try to turn up or down the volume it makes a scratchy noise and then the sound on one channel is gone (sometimes the left, sometimes the right). I have to turn the volume up and down many times to find a specific spot every time (in which the volume must be completely still) so that i can get sound on both channels
Is there a way to fix this problem? Does anybody else have it?
Thanks!
Clean the volume potentiometer.Or replace it.
Martin
Clean with water or with a contact cleaner spray?
Or should i use a dust blower?
If it come to replacing the volume potentiometer, is it simple, do i need a manual or something?
Sorry for the too much questions, it's just that i have the Beomaster for about 40 years (and it's working ok except for that volume issue) and i don't want to do anything that would damage it...
Thanks!!!!!
Contact cleaner.I use the "Kontakt 60" since it evaporates almost completely, not adding to the mess.
Replacing the potentiometer requires soldering, but try the contact cleaner first.Spray a small amount into the potentiometer and excersize it full stroke back and forth a dozen times or so (Beomaster unpowered) - then test again.
Martin thanks!
I've found a contact spray that i had (Teslanol lector clean)
Should the contact spray has oil? isn' it dangerous?
The volume potentiometer is this correct?
Should i spray underneath it?
Again sorry about the dump questions, i want to make sure i won't do something stupid and damage the bombaster...
No oil!Spray into the small openings in the potentiometer housing - that's on the opposite side of the circuitboard.
Thanks a lot!!! I sprayed the potentiometer and everything is ok!!! The scratching noise is gone and there is volume on both speakers!!
If that didn't work and i had to replace the potentiometers i don't know if i could do it. What i saw when i opened it was a bit complicated. There were strings coming from the volume bar and end up in the potentiometer moving it back and forth. It doesn't seem like an easy job (or maybe it is if you' re experienced)
So thanks again!!!!