Peavey CS4080HZ Blown |
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Pinyorouk
Young Croc Joined: 31 January 2011 Status: Offline Points: 550 |
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Posted: 21 December 2021 at 4:12pm |
I managed to repair the amp. Sourced original IGBT's etc.
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Pinyorouk
Young Croc Joined: 31 January 2011 Status: Offline Points: 550 |
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After some reading the type of IGBT's used are nothing special. What was throwing me off was the symbol. Will look at alternatives.
Edited by Pinyorouk - 03 December 2021 at 11:59pm |
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Pinyorouk
Young Croc Joined: 31 January 2011 Status: Offline Points: 550 |
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Thanks for your reply.
Edited by Pinyorouk - 03 December 2021 at 11:58pm |
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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I can't even remember doing the last one, but if it's a toss up between a possible fake or reject ebay transistor and cross referencing to a genuine 'equivalent' I would choose the latter each time.
The problem with dodgy rail switching devices is that they might fail mid-gig and you wouldn't know until the output section has cooked itself to death. |
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Kevin
North Staffordshire |
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Pinyorouk
Young Croc Joined: 31 January 2011 Status: Offline Points: 550 |
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I have since found them on Ebay. Just need to try and see if they are genuine.
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Pinyorouk
Young Croc Joined: 31 January 2011 Status: Offline Points: 550 |
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Hello Kedwardsleisure and SimonP. I have the unfortunate task of repairing one of these amps. Did any of you have to replace the now obsolete rail switching IGBT by any chance? I have 1 short circuit and looking for an equivalent. Will replace as a pair amongst other parts.
Thanks, Mike
Edited by Pinyorouk - 02 December 2021 at 8:48pm |
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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I've just done the crest version with a blowup, that quad transistor had blown too.
More worringly for me are those emitter resistors that sit under the heatsinks and nothing but the proper ones would fit I'm sure
funnily enough I said that about the last one, and the one before. This time I mean it!! Edited by kedwardsleisure - 17 May 2016 at 9:12pm |
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Kevin
North Staffordshire |
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simonp1100
Young Croc Joined: 01 September 2008 Location: Bristol Status: Offline Points: 1103 |
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Repaired one of these and a pigs ear to do, loads of surface mounts and the 4 transistor driver chip was a bugger. NEVER AGAIN
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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There are fake 4080's around. Inside is the usual crest/qsc copy. They might actually be better, not for me to say
Edited by kedwardsleisure - 17 May 2016 at 7:27pm |
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Kevin
North Staffordshire |
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Panda
Registered User Joined: 01 November 2010 Location: Cape Town Status: Offline Points: 46 |
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Gentlemen, thanks for your your advice. I think I'll pass on this one. I would rather wait a little longer for a Matrix or SAE PCM.
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4938 |
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If the amp is cheaper than the scrap weight plus your fuel to the scrap yard then you can't lose. Otherwise avoid unless you have a fetish for surface mount
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Kevin
North Staffordshire |
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DjLeco
Young Croc Joined: 21 April 2009 Location: Bucharest Status: Offline Points: 817 |
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I'm A Stupid SMART Romanian...
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