Peavey CS4080HZ Blown
Printed From: Speakerplans.com
Category: General
Forum Name: Amp Forum
Forum Description: The 'Stopping Jake Fielder moaning constantly' forum description...
URL: https://forum.speakerplans.com/forum_posts.asp?TID=95772
Printed Date: 19 April 2024 at 8:35pm
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Topic: Peavey CS4080HZ Blown
Posted By: Panda
Subject: Peavey CS4080HZ Blown
Date Posted: 17 May 2016 at 11:09am
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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.
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Replies:
Posted By: levyte357-
Date Posted: 17 May 2016 at 11:30am
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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.😕 ------------- Global Depopulation - Alive and Killing. |
Posted By: Earplug
Date Posted: 17 May 2016 at 1:40pm
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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. ------------- Earplugs Are For Wimps! |
Posted By: DjLeco
Date Posted: 17 May 2016 at 4:05pm
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If this could help: http://www.filehost.ro/3172161532/peavey_cs3000_4000_4080hz_pdf/" rel="nofollow - peavey cs3000 4000 4080hz pdf http://postimg.org/image/yg78mlqdt/" rel="nofollow">
 ------------- I'm A Stupid SMART Romanian... |
Posted By: kedwardsleisure
Date Posted: 17 May 2016 at 5:41pm
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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 ------------- Kevin North Staffordshire |
Posted By: Panda
Date Posted: 17 May 2016 at 6:41pm
| 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. |
Posted By: kedwardsleisure
Date Posted: 17 May 2016 at 7:26pm
There are fake 4080's around. Inside is the usual crest/qsc copy. They might actually be better, not for me to say  ------------- Kevin North Staffordshire |
Posted By: simonp1100
Date Posted: 17 May 2016 at 8:53pm
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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 |
Posted By: kedwardsleisure
Date Posted: 17 May 2016 at 9:11pm
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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!! ------------- Kevin North Staffordshire |
NEVER AGAINPosted By: Pinyorouk
Date Posted: 02 December 2021 at 8:47pm
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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
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Posted By: Pinyorouk
Date Posted: 02 December 2021 at 10:51pm
| I have since found them on Ebay. Just need to try and see if they are genuine. |
Posted By: kedwardsleisure
Date Posted: 02 December 2021 at 11:13pm
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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. ------------- Kevin North Staffordshire |
Posted By: Pinyorouk
Date Posted: 03 December 2021 at 4:14pm
Thanks for your reply.
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Posted By: Pinyorouk
Date Posted: 03 December 2021 at 11:50pm
| After some reading the type of IGBT's used are nothing special. What was throwing me off was the symbol. Will look at alternatives. |
Posted By: Pinyorouk
Date Posted: 21 December 2021 at 4:12pm
| I managed to repair the amp. Sourced original IGBT's etc. |