Peavey CS4080HZ Blown |
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Panda
Registered User Joined: 01 November 2010 Location: Cape Town Status: Offline Points: 46 |
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Posted: 17 May 2016 at 11:09am |
I have an opportunity to buy a CS4080HZ for almost nothing. The amplifier powers up but has no audio output. Apparently some clown wired the speaker cables into a dead short.
Could this be a viable to repair or would it be a complete write off? I have no idea if Peavey use specially matched power transistors like crown. If not I could probably get some from our local electronics wholesaler for cheap.
Edited by Panda - 17 May 2016 at 11:18am |
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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I wouldn't buy that amp if it was working.
Does'nt perform to spec on sub notes, and often overheats, in 4 ohm stereo. Very desirable.😕 |
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Global Depopulation - Alive and Killing.
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Yes, not the best amp in the world, but it does depend on what you`re going to do with it - 2 ohm bass, no, no way. One guy I know uses one to power 4 x EV ZX5-90`s and it`s fine with that. If it`s really cheap - and does power up it may be worth trying to fix. I don`t think that there`s anything special like matched devices in there.
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Earplugs Are For Wimps!
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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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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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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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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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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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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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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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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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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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