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I have a Peavey Cs 400 amp that keeps blowing the 4amp fuse as soon as I turn it on any ideas

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  • Audio Player... Master
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Fuses blow when there's an overload. This is usually caused by a transistor or IC that has shorted. You should look to the main amp as the most likely cause. If the main amp has transistors, then a test with an ohmmeter will show the faulty part. Connecting across the terminals will show the same as when you touch the test probes together. If you don't see a hole in the part first!

Posted on Oct 19, 2013

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6ya6ya
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Posted on Jan 02, 2017

Thumbsmagee
  • 1 Answer

SOURCE: peavey classic 50/50 keeps blowing fuses.

Rob,

I have a classic 50/50 as well and re-tubed it with JJ el84s, vintage teslas and mullard 12at7s. As long as you replaced it with EL84s, I can't imagine that the output would be increased enough to damage the OT. When I got my 6505 Combo, one of the 6L6s was bad, and it kept blowing fuses and howling like a banshee. I would think that an OT problem would result in a significant loss of output...or none at all. I've gotten DOA tubes from a few places. I would suggest swapping each tube out 1 by 1, until you find it...if that is indeed the problem...before you pay the cash to have it worked on.

Posted on Oct 29, 2007

paulm10
  • 73 Answers

SOURCE: channel A keeps switching on then off again when

Over heating from dust. (thermal blanket) Remove top and blow out. Also, observe proper output impedance matching.
Paul

Posted on Jun 13, 2009

  • 4234 Answers

SOURCE: PEAVEY CS 800S WHERE IS THE FUSE LOCATED? WHAT

There are many variants of this amp depending upon its age. The fuse will be a ceramic one that should be solid white and be around 10A or more. This will be about 1-1/4" long and located inside the amp. Remove the top cover for access. It will be in a fuse holder. Please make sure that the unit is unplugged before opening.

Dan

Posted on Jul 05, 2009

TOLhamRadio
  • 509 Answers

SOURCE: why does my carver receiver keep blowing the 4 amp

check speaker wires for shorts. verify correct speaker impedance (if amp if for 8 ohms, don't use 2 ohm speakers. Make sure not overheating issues with junk on top of amp.

Posted on Dec 29, 2009

  • 1 Answer

SOURCE: I NEED TO HOOK UP MY CS 4000 AMPS

My cs400 puts out at about 1/10 volume on both channels. Best I can tell with my Huntron is that all transistors, diodes and caps are good. All op amps tested good. Plus and minus 58 vdc and 16vdc on zener board seems fine. The problems is common to both channels.

Posted on May 28, 2010

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the power board is shorted and will need replacement. Yo can get the power supply board from www.tvrepairworld.com

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Hi,my peavey amplifier cs 4080 hz blew the transistor and number for the transistor part G30N60C3D ,how can it cost me


Ouch! That is an expensive one... a little over $7 here:

http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepage_link=hp_go_button&KeyWords=g30n60c3d

The BAD news is that USUALLY other things go at same time or cause the failure. If you miss replacing a second part that is degraded, then you blow out the new one. Pay particular attention to the gate limiting Zener diode... it may be blown open and would result in instant failure again. Also ALL parts associated with the gate drive of that transistor.

The circuitry for this amp is rather complicated and a lot of other parts need to be checked for damage before putting full power on the unit again.

When firing this up, put a 250 Watt lamp in series with the power input to act as a resetable fuse to avoid blowing out the part again... It is good to use a variac to slowly bring up the voltage at first. If the lamp stays lit, better keep looking for bad parts.

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Why does my carver receiver keep blowing the 4 amp fuse??(4amp 125v)


check speaker wires for shorts. verify correct speaker impedance (if amp if for 8 ohms, don't use 2 ohm speakers. Make sure not overheating issues with junk on top of amp.

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Channel A keeps switching on then off again when


Over heating from dust. (thermal blanket) Remove top and blow out. Also, observe proper output impedance matching.
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Apr 05, 2009 | Peavey CS 1400 Amplifier

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As soon as switch is turned on fuse is blown.


Try to find a better ground wire and also make sure the fuse is in before it is turned on or it will blow

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Peavey amp


You could also use speakers rated less than 400 RMS provided you dont crank the volume knobs all the way up.
I think the CS400 is 200 Watts RMS per channel into 8 ohms
400 watts bridged

Here's the manual. You'll need acrobat to open it.

http://www.peavey.com/assets/literature/manuals/80300990.pdf

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Fuses for P-07


the fuse you need is a t4al 250v

this is a common slow blow 250v 4amp fuse.

You can get them at RadioShack



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1 Answer

Peavey 1200 Amplifier


Some of the outputs transistors is bad hence causing a bridge in circuit,thats why the fuse is blowing.Check all the outputs transistors on both channels,rectifiers and zena diodes these are the possible causes of circuit bridge when they are faulty.The fan works on AC thats why it is not affected even when the fuse is blown.Please if you have anymore challenge please send me a mail on mikewee4wee@yahoo.com

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