Paul70bass Posted November 27, 2013 Share Posted November 27, 2013 I have a Trace Elliot AH500-7 and during a gig last week the sound from the speakers just cut out. I tried a few things but couldn't get it back again, there was still power to the amp but the red LED above the output gain was clipping. I have had the amp out of it's casing and noticed the fan isn't turning, I assume now that there is a cut off when the fan fails to protect the amp / speakers etc. There doesn't seem to be any power getting to the fan so at the moment I am unsure as to whether there is a problem with the board or just the fan. My question is: if the fan needs replacing is there a specific fan to fit this model, would an off the shelf fan do the job? If there is a problem with the powder to the fan then I guess this is a job for a trained professional. Has anyone else had a similar problem with this or any other TE model? Paul Quote Link to comment Share on other sites More sharing options...
johnny_frog Posted November 28, 2013 Share Posted November 28, 2013 Any idea how old it is? Found the wiring diagram for the MkV... fan should be seeing 46V It's rated at 110V 20w according to the parts list Quote Link to comment Share on other sites More sharing options...
RandomBass Posted November 28, 2013 Share Posted November 28, 2013 Based on your description, does it look like this? Quote Link to comment Share on other sites More sharing options...
Paul70bass Posted November 29, 2013 Author Share Posted November 29, 2013 Hi guys Yes this is the one, I bought it from new 6 years ago. I know this model has been de-listed and replaced with the AH600, so I'm hoping parts will still be available Paul Quote Link to comment Share on other sites More sharing options...
RandomBass Posted November 29, 2013 Share Posted November 29, 2013 [quote name='Paul70bass' timestamp='1385726001' post='2291528'] Hi guys Yes this is the one, I bought it from new 6 years ago. I know this model has been de-listed and replaced with the AH600, so I'm hoping parts will still be available Paul [/quote] I've worked on older Trace amps, and the fan was a standard 80mm 12v jobbie you'd find in a PC. The protection circuit is usually a thermo switch mounted on the heatsink which trips at high temperature if the fan has failed for some reason, and shuts off the speaker load to allow the amp to cool down. However, I can't guarantee yours is the same - perhaps get it to a pro to check. I've seen faulty thermo switches before which jam in the off position. Cheers Geoff Quote Link to comment Share on other sites More sharing options...
Paul70bass Posted December 2, 2013 Author Share Posted December 2, 2013 Thanks Geoff I did indeed take it to a pro and the fan was found to be damaged, when removed it just fell apart. Anyway a new fan has been fitted and all is well again, gigged it last Friday with no issues so hopefully the problem is solved. Paul Quote Link to comment Share on other sites More sharing options...
RandomBass Posted December 2, 2013 Share Posted December 2, 2013 (edited) [quote name='Paul70bass' timestamp='1385998562' post='2294445'] Thanks Geoff I did indeed take it to a pro and the fan was found to be damaged, when removed it just fell apart. Anyway a new fan has been fitted and all is well again, gigged it last Friday with no issues so hopefully the problem is solved. Paul [/quote] Ah that's good news Paul. I recently had a Trace fan which jammed solid as the bearings failed, and I found an exact replacement easily enough on ebay. Enjoy! Geoff Edited December 2, 2013 by RandomBass Quote Link to comment Share on other sites More sharing options...
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