Members vtrain8764 Posted July 8, 2017 Members Share Posted July 8, 2017 I have a Bugera 6262 combo that just started a weird intermittent problem. While it's on the clean channel, sometimes it jumps itself to the crunch mode. While it's in the crunch mode, the footswitch becomes inoperable, and I can't get it to do anything. The lead channel button won't activate while it's doing this. I thought it was the footswitch, but this has happened without the footswitch plugged in. This has happened a half dozen times over 6 months. I took it to my local tech, and he couldn't get it to do this. Everything checked out normal. Anybody have an idea? Link to comment Share on other sites More sharing options...
Members mbengs1 Posted July 8, 2017 Members Share Posted July 8, 2017 I have a similar problem with my bugera. sometimes it switches to the lead or crunch mode by itself. I only use the clean channel so it used to switch to the lead channel on its on a lot. but now it doesn't do that anymore. I hope it remains that way. Link to comment Share on other sites More sharing options...
Members Cornholio Farquarth III Posted July 29, 2017 Members Share Posted July 29, 2017 Can you post a schematic for us? Sounds like a switching transistor problem, but who knows. Link to comment Share on other sites More sharing options...
Members onelife Posted July 29, 2017 Members Share Posted July 29, 2017 A common problem with modern amps is the cheap and dirty voltage regulators that use a Zener diode and a power resistor. The power resistor heats up and sometimes causes an open circuit that can result in unexpected voltages which confuse the logic circuits that control the switching. Link to comment Share on other sites More sharing options...
Members mbengs1 Posted July 30, 2017 Members Share Posted July 30, 2017 You could ask the tech to make only one channel operable. that's what i'd do. I only use the clean channel so maybe u could 'disconnect' the other channels. Link to comment Share on other sites More sharing options...
Members 1001gear Posted July 30, 2017 Members Share Posted July 30, 2017 Have you checked if yours is susceptible to radio frequencies as in RC car controllers? Link to comment Share on other sites More sharing options...
Members Cornholio Farquarth III Posted July 30, 2017 Members Share Posted July 30, 2017 Good for posting the schematic. I have a few questions first. Was the air temperature the same each time you had this problem ? Had the amp been running a while when this occurs? Are there any common circumstances associated with the problem occurring? Link to comment Share on other sites More sharing options...
Members vtrain8764 Posted August 6, 2017 Author Members Share Posted August 6, 2017 I don't have a schematic. I am absolutely not interested in "disconnecting" the lead channel. I would buy an amp with only clean, that is not an option. The gain channel is amazing on this amp, that's what I bought it for. Link to comment Share on other sites More sharing options...
Members vtrain8764 Posted August 6, 2017 Author Members Share Posted August 6, 2017 It has happened under completely random circumstances. The power resistor idea sounds logical, I will mention it to my tech, thank you. Link to comment Share on other sites More sharing options...
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