budget bassist Posted May 2, 2009 Posted May 2, 2009 (edited) I have an ashdown EB180 head wih MAG 210T and 115 cabs. Basically, i just went to turn it on just now and there was a faint buzzing sound, then it just got deafeningly loud. I've turned the gain and master volume down, still doing it, removed the guitar lead, still doing it, checked each cab separately, still doing it. So, any insight as to what may be the problem? I don't have a clue, and i really REALLY don't have the cash to get it fixed. f***. EDIT: ta for moving CK Edited May 2, 2009 by budget bassist Quote
budget bassist Posted May 2, 2009 Author Posted May 2, 2009 (edited) cheers for moving the thread! Edited May 2, 2009 by budget bassist Quote
josh3184 Posted May 2, 2009 Posted May 2, 2009 (edited) wow Kiwi, I didn't know you could fix amps through mind power alone! incredible! Edited May 2, 2009 by josh3184 Quote
budget bassist Posted May 2, 2009 Author Posted May 2, 2009 nah he moved the thread for me, i put it in amps for sale by accident! amp still fooked Quote
Kiwi Posted May 2, 2009 Posted May 2, 2009 i had a similiar experience with a warwick cl combo and it turns out that it was over heating because it hadn't been fitted with a thermostat when it left the factory. Quote
budget bassist Posted May 2, 2009 Author Posted May 2, 2009 (edited) hmm, i don't think it's that, the fan turns on as soon as you turn the amp on i think EDIT: can't even ring ashdown until tuesday now, argh! Edited May 2, 2009 by budget bassist Quote
Ou7shined Posted May 2, 2009 Posted May 2, 2009 Dunno. Open her up and vacuum out any dust n crap and maybe a bit of switch cleaner for the pots and see how that goes. Quote
budget bassist Posted May 2, 2009 Author Posted May 2, 2009 (edited) yeah might as well, aint gonna void any warranty i guess EDIT: just opened it up, not really any dust to speak of and without knowing what i might be looking for, no blown componentry, fuses all intact, no loose wires or anything... Edited May 2, 2009 by budget bassist Quote
Al Heeley Posted May 2, 2009 Posted May 2, 2009 (edited) check your mains lead and plug for a loose wire, a short across the earth, anything like that. Try a different lead if you have one. Edited May 2, 2009 by Al Heeley Quote
escholl Posted May 3, 2009 Posted May 3, 2009 sounds like a power supply problem -- is it a 50Hz or 100Hz hum? most likely either a loose or faulty filtering capacitor, although it could be other things. times like this it's handy to have an oscilloscope the good news is it should be fairly simple (read: cheap) to fix. Quote
budget bassist Posted May 3, 2009 Author Posted May 3, 2009 [quote name='escholl' post='478091' date='May 3 2009, 08:58 AM']sounds like a power supply problem -- is it a 50Hz or 100Hz hum? most likely either a loose or faulty filtering capacitor, although it could be other things. times like this it's handy to have an oscilloscope the good news is it should be fairly simple (read: [b]cheap[/b]) to fix.[/quote] good to know, though i'm not too sure what pitch the hum is, i don't fancy leaving it on long enough to find out (it's VERY loud), but it seems higher than 100hz? not sure tbh Quote
budget bassist Posted May 6, 2009 Author Posted May 6, 2009 [quote name='escholl' post='478091' date='May 3 2009, 08:58 AM']sounds like a power supply problem -- is it a 50Hz or 100Hz hum? most likely either a loose or faulty filtering capacitor, although it could be other things. times like this it's handy to have an oscilloscope the good news is it should be fairly simple (read: cheap) to fix.[/quote] Well done that man, ashdown reckon is was either a crack in the soldering on one of the large power amp caps or a faulty cap, sounds like a relatively easy/cheap fix, amirite? Quote
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