9900 / 6666 volume control problem.
Posted: 20 Feb 2024, 15:08
My "Anytone" (silly name) 6666 has developed a strange issue with it's volume.
Occasionally, with no input from me, the volume "jumps" from say number 07 to number 12, or down to 03, etc, fairly random as far as I can see.
It's not just the number, it is the actual output volume as well.
Note, the volume pot, whilst it is a normal pot (I think) does not work the same as they usually do, it actually controls a digital circuit
Normally I would suspect a worn volume pot, but I don't think this is the case here because it does the same if I turn it up to nearly full, away from the "normal use" range, where wear might be expected.
The other problem is that the access to the pot is a HORRID job with lots (maybe 30) of tiny solder connections that have to be removed that join the front panel to the main PCB, so I cannot even try a squirt of Deoxit or Servisol (not that I think that would work in this case).
I have checked for dry joints by examination and tapping / moving "stuff" whilst it is on.
Note, I am very well experienced with more conventional setup repairs as I am a retired electronics engineer, but not up to speed with the latest gear.
Any thoughts on this folk ?
Occasionally, with no input from me, the volume "jumps" from say number 07 to number 12, or down to 03, etc, fairly random as far as I can see.
It's not just the number, it is the actual output volume as well.
Note, the volume pot, whilst it is a normal pot (I think) does not work the same as they usually do, it actually controls a digital circuit
Normally I would suspect a worn volume pot, but I don't think this is the case here because it does the same if I turn it up to nearly full, away from the "normal use" range, where wear might be expected.
The other problem is that the access to the pot is a HORRID job with lots (maybe 30) of tiny solder connections that have to be removed that join the front panel to the main PCB, so I cannot even try a squirt of Deoxit or Servisol (not that I think that would work in this case).
I have checked for dry joints by examination and tapping / moving "stuff" whilst it is on.
Note, I am very well experienced with more conventional setup repairs as I am a retired electronics engineer, but not up to speed with the latest gear.
Any thoughts on this folk ?