Tweet
I replaced the power tubes with a new pair due to a blown one and 2 47uf/500v filter caps (they were bulging big time). The amp fires up but come to find out there is no reverb or effects. I am wondering if any of you have any advice on determining whether the DSP board is blown or if some related circuitry is the culprit (micro controller?, FET?, diode?). This sort of troubleshooting is definitely a weak spot for me...
Symptoms:
When the effects or reverb from the front panel pot/switch combo are turned on I can hear relays switching. The led on the push-button to toggle between effect modes (chorus/echo/vibe/off) cycles through the corresponding colors. No change in any mode... no hiss, noise, etc when effects are engaged. Footswitching is also not functional.
Schematic:
http://music-electronics-forum.com/a...all-mhz40c.pdf
Any ideas on how to proceed would be greatly appreciated.
Thanks
Symptoms:
When the effects or reverb from the front panel pot/switch combo are turned on I can hear relays switching. The led on the push-button to toggle between effect modes (chorus/echo/vibe/off) cycles through the corresponding colors. No change in any mode... no hiss, noise, etc when effects are engaged. Footswitching is also not functional.
Schematic:
http://music-electronics-forum.com/a...all-mhz40c.pdf
Any ideas on how to proceed would be greatly appreciated.
Thanks
Comment