Re: Carver amp started making a low fluttering sound.
I have a Carver amp which developed a "hum" also. As a troubleshooting step only (long term this is NOT a solution) you can use a ground plug adapter that removes the ground lug from the unit. This is an adapter that has THREE (Line, Neutral, Ground) female sockets for the amp to be plugged into, and TWO male plugs to go into a wall socket. If the buzz goes away, you've got a leaky capacitor in the Power Supply section of the amp. It will take some doing to actually fix the problem, but this will narrow down the cause.
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Hum can come from a jillion different places. Is this hum coming from the unit with no speakers connected, or is it heard through the speakers? What sources are being used? What cables? Are thereany common sources of interference near? Troubleshooting is difficult without much information.
Are you plugging directly into the wall or a power strip? Can you plug something else into that exact port to verify that it's still getting power at that spot? If it is I would still attempt to plug it into another port to see if that helps. I know it sounds silly but this is the simplest place to start.
Do you have a voltmeter? I would check the output of the power supply itself to make sure the correct amps and voltage are still coming out of it.
Direct drive turntables have electronically controlled speed. If the records you are playing are warped (not flat) that will cause wow & flutter. If that's not the problem then you might try connecting the turntable to a different power outlet using a long extension cord. Failing that, the turntable needs repair.
this could be related to the power supply it is the
magnetic field variety that has a thyristor controlling its input check if the voltage supply to the amp outputs is varying when the pulsing is heard. if so
the control curcuit could be at fault.
2. Reinsert the power adapter directly into the wall socket.
any power strips or surge protectors temporarily to ensure that these
items are not preventing the WAP54G proper operation.Note: Make sure that you are using the power adapter that came with your WAP54G.
4. Plug the power adapter into a different wall socket in another room.
5. Press and hold the reset button for 1 minute. Release the button. Then turn off the WAP54G for another minute. Then turn it back on.
6. If the power light is still red, then you will need to replace the WAP54G.
If you can hear music with the volume up, but like it was turned down low (from the power amp), then yes there is something up with it. If it's the same on both left & right channels, then it's something common to both. For instance the power supply, or an IC that has both channels going in it.
If however the power amp does produce sound normally with another device, then either the turntable has a fault, or the pre-amp has, perhaps on the pre-amp inside it for the cartridge.
Before you actually replace the power supply, check some other things first:
1. Wall socket
2. Power strip/surge protector
3. Power cable
4. On the back of the computer, where the power cable plugs into, is the red switch set to 115? It should be 115.
5. Make sure that the power cable is not connected to a regular
extension cord. Power cable must plug directly into a surge protector
that is not daisy-chained to another power strip, surge protector, or
normal (household) extension cord. Surge protector must be directly
plugged into wall socket.
If none of the above solve the problem, open up the case and ensure
that all power connections are secure. Also check ALL other components'
connections. Any loose connections can cause problems for you.
If everything is secure and the problem persists, replace the power supply.
I've owned four of the amps from this series and in no way are the power switches the weakness in this product. (A-220, A-753x, A-760x and an A-500x.) If yours is "broken" it had to be an environmental issue or single unit anomaly if yours hasn't held up. I don't get why people are asking your about the output characterstics of the amp because I don't see anything about THAT in your question. Go to Ebay.com and search for "Sunfire Amplifier" and look for a gentleman who's taken over "Rita's" Carver repair service. They both were affiliated with Bob Carver (you can also search for Bob himself under the seller name "audioshopper") and someone can direct you towards somebody who might (MIGHT) have a NOS power switch available. There have to be a ton of switches that will perform the same function, they just might not be a perfect Chassis fit. There's a solution to your problem. If nothing else, straight wire the switch on and plug the amp into a power strip.