andrewrx7 Posted February 9, 2008 Share Posted February 9, 2008 Hi there, I've got a Trace Elliot AH300-7 head and went to do our 1st gig of the year yesterday, only to find the output is knackered - it seems set to full on no matter where the pot is set (better than no output, I suppose, at least we could still do the gig, by dropping the input gain significantly). I have no recollection of dropping or knocking the head - I look after my gear very well. Any idea of what has gone wrong - presumably electrical? The output button still turns as it should, doesn't feel like it is broken. Has anyone had any similar problems, and therefore give me an indication before I try to find someone willing to have a look at it? Thanks for any info! Cheers Andrew Quote Link to comment Share on other sites More sharing options...
neilb Posted February 9, 2008 Share Posted February 9, 2008 (edited) Sounds like the output pot has shorted somehow. They are mounted directly onto a verticle PCB IIRC. Try taking the case apart and spraying a load of contact cleaner (Maplin) in and around the output pot. Also check on the "solder" side of the board near to the three pot contacts. The short MAY be visible. Edited February 9, 2008 by neilb Quote Link to comment Share on other sites More sharing options...
andrewrx7 Posted February 10, 2008 Author Share Posted February 10, 2008 [quote name='neilb' post='137233' date='Feb 9 2008, 06:56 PM']Sounds like the output pot has shorted somehow. They are mounted directly onto a verticle PCB IIRC. Try taking the case apart and spraying a load of contact cleaner (Maplin) in and around the output pot. Also check on the "solder" side of the board near to the three pot contacts. The short MAY be visible.[/quote] Thanks for the pointers! Andrew Quote Link to comment Share on other sites More sharing options...
andrewrx7 Posted February 17, 2008 Author Share Posted February 17, 2008 Well took the main unit out of the casing, and can't see anything wrong. Far too complicated for me!! So it's gone off to a chap to have a look at. Fingers crossed it is an easy to locate issue! Anyone else had issues with TE heads? Quote Link to comment Share on other sites More sharing options...
Merton Posted February 17, 2008 Share Posted February 17, 2008 Nope, mine have all been virtually bombproof. My Commando combo died fairly early in its life coz my mate dropped it out of a van and the heatsinks fell off the output transistors. But Trace fixed it and it's never put a foot wrong since. Good luck getting yours fixed Quote Link to comment Share on other sites More sharing options...
andrewrx7 Posted March 4, 2008 Author Share Posted March 4, 2008 Well, just to complete the thread, volume pot was at fault, the track inside had broken. In addition, something to do with the EQ board was loose, and there was a split track on the fan controller (not sure what that actually means, maybe on the PCB?). The head has never cut out, so the fan has been working, but there was obviously the potential for something to happen at any time (i.e. fan to cut out and the head to overheat). So overall, it was worth having it looked at. £45 all sorted. Quote Link to comment Share on other sites More sharing options...
Merton Posted March 4, 2008 Share Posted March 4, 2008 Good to hear. £45 isn't bad for getting a few little things fixed which could have all gone independently at any time Quote Link to comment Share on other sites More sharing options...
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