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Hi family its my first time here. anyway my PVi 3000 amp is producing a scratchy sound on one channel (A) to be precise. The other channel is good. what could be the problem and where to start?

I was powering my monitors 15" EV speakers all of the sudden there pops out a scratchy sound. pls help.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 31 Answers

SOURCE: Sherwood AI5010 no sound from either channel

Hi There DEKCAT
Its very unusual for both channels to blow......

I suspect that there is a blown power fuse inside the case......

There are fuses sometime located on the outside rear of the case and these can be easily checked to determine if they are blown..If you find one is blown please replace with the corrrect rated fuse,..... its current rating wil be on a small label on the case outside rear. like 1.0amp, or 1.5amp etc...

If you need to go inside the case please ensure the power plug is removed from the wall socket first.

You will find small glass fuses in the DC power supply feeds and probably one of these has blown, once again replace with the correct rated fuse.

Im not sure if your amplifier is a FET type or a large 32-40 pin IC type as if these are blown you will need a service person to do the replacement...

Please note there is a small relay that clicks 20seconds after turn on at the switch....if this click is not happening then there is problems with the timer circuit or the relay itself...

This relay controls the output to the speakers and as such stops all the sound output if its not working...so the first thing is to check all fuses, if they are OK then check the Relay operations....

Cheers From YUBEUT

Posted on Nov 16, 2007

petraman7
  • 1175 Answers

SOURCE: Gem Sound XP-350 both channels failed

Speaker fuses are generally fast-blow styles 250 volt glass
If an amp shuts down, with speakers connected, it sounds like one of the power supply lines does NOT like what it's "seeing" . Probably output transistors bad ( or module)

Take it to a tech.

Scott out.

Posted on Jan 08, 2008

marsrover
  • 682 Answers

SOURCE: No sound/test tone front front right channel

1-make a reset to your system.2-repeat your speaker setup.3-confirm that you assign your sysem for 5 chanell surround system.-4-change the cables between left and right front speakers if the trouble go to left channel you will have a problem in receiver itself-if the problem exict you will have a problem in speaker itself(cable or speaker)

Posted on Sep 30, 2008

  • 132 Answers

SOURCE: popping sound from speaker when changing channels

This noise is normal with the cable box unless you set the cable box on HDMI sound

Posted on Feb 01, 2009

male_28_cam
  • 1555 Answers

SOURCE: Suddenly my speaker volume is low and scratchy

Congrats, you yourself is a good troubleshooter. Just pinpointed your problem. What you just diagnoist can be easilly checked just by taking other good known speaker. If that works your speaker is short check for audio output wires. If not your card needs replacement. If need further clarifications just comment.

Posted on Aug 04, 2009

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1 Answer

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Easiest way, get any old speaker 4 or 8 ohm and hook it up to channel 1 then plug an rca lead into channel 1, power up amp and touch finger on rca and you should hear pop or scratchy sound from speaker . Audio circuit for channel 1 is good . repeat for channels 2 3 4 .

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1 Answer

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It could be a multitude of things, Solder Joints, Leaking / Bulging capacitors, Dried Out Capacitors, Faulty Valves.

It could be that the valve might be on there way out.

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I can't really offer anything more, but if you have more questions, then please ask.

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Re: scratchy speaker sound quality


Have you tried with headphones?  Scratchy WITH heaphones. Reinstall driver. If it's NOT scratchy with headphones.  Either your speakers are blown, (which usually doesn't happen), you need to reinstall your sound card drivers, or bad settings.  Double click sound horn. Turn some volumes haflway, or mute sound channels you aren't using. Options Properties will let you show ALL sound properties. Ctrl+S makes the sound properties half size.
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Might ask to reinstall automatically.  Thats fine.  Install then reboot.  I prefer to cancel the install until I have rebooted.  But both ways tend to work.  
Hope you don't have to change your speakers.  Need to pull your mobo to get to em. Instructions here pg. 5-55
James Mac

Sep 08, 2008 | Compaq Computers & Internet

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Hi Jimbob. Sounds like you have dirty/dry controls/switches. The contact lubricant dries out on them producing intermittent and scratchiness when you operate them. Clean any offending controls or signal switches with CRC2-26 by squirting(to flood then internals) each control/switch. you will have to do this from the inside of the amp. You may also have a dirty speaker protection relay, sound may return to a dead channel when you turn the vol up points to that. Good Luck. If you need more info feel free to get back to me here. Happy to talk you through more if you cant sort it out.

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