This unit came in after a big electrical storm. When power is applied you h ear a slight hum from the speaker outputs but it does not respond to any in put. It seems to be a problem in the output or driver section but this is d ifficult to trace. Does anyone have a service manual for this? Thanks, Lenn y
Probability-wise in those circumstances, whatever can least accommodate voltage surges, so anything requiring a nice low 3.3 or 5V supply ie the main system control micro knocked out first
This unit came in after a big electrical storm. When power is applied you hear a slight hum from the speaker outputs but it does not respond to any input. It seems to be a problem in the output or driver section but this is difficult to trace. Does anyone have a service manual for this? Thanks, Lenny
I assume you have tried injecting a signal into the PAIn1 and 2 jacks and established both Power Amps don't work?
(It might be a mistake, IMHO, to automatically assume the recent storm has anything to do with the current fault)
On Friday, September 27, 2013 10:35:24 PM UTC-4, snipped-for-privacy@gmail.com wro te:
hear a slight hum from the speaker outputs but it does not respond to any input. It seems to be a problem in the output or driver section but this is difficult to trace. Does anyone have a service manual for this? Thanks, Le nny
I found that Peavey employs several FETs on the inputs to some of the ampli fiers in the unit. These are apparently "sacrificial" components which shor t during an overload thereby protecting the associated IC's. I found three shorted ones. I ordered replacements from Peavey and will see what happens. The clue was that the "X" voltage which is supposed to be -22v was zero. T he shorted FET's essentially shunt it to ground. Lenny
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.