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Manual for Marshall G80RCD amplifier - Audio Players & Recorders

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Posted on Jan 02, 2017

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SOURCE: problem of marshall g80rcd, volume drop when i play

It sounds like your volume control is dirty. You will have to disassemble the amp enough to get access to the volume potentiometer which is soldered to the circuit board. There will be a square hole in it that you can spray some contact cleaner into the control. Use only contact cleaner as anything else could damage the control. Use a small squirt and rotate the shaft. If this doesn't solve the problem you may have to replace the control. While you have it apart, examine the solder side to make sure all the solder joints are perfect especially those on the controls. A bad solder joint can also cause the same problem. Before you take the amp apart unplug the power with the amp on and the volumes turned down. This will discharge the capacitors so it will be safe to work on. I hope this helps.

Posted on Nov 01, 2009

Testimonial: "thx alots, i did try to clean it by blasting air on it, but i just not really sure. i will give another try. thanks for your quickly response. "

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SOURCE: My marshall G80RCD plays perfect...but

A wild guess is that the soldering on the cold side of the volume control pot MAY be bad. When it vibrates and loses contact where it is soldered, the unit will go to full volume. Check soldering of ALL the pot leads into the circuit board. Look for a thin grey line around the lead part way up the menicus of the soldering.

Posted on May 12, 2011

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1 Answer

Where can i find a Marshall mg30cfx owners manual


Here is a link to the Marshall MG30CFX manual, it is the same manual as the MG15CFX:

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Best of luck to you!

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My marshall G80RCD plays perfect...but every now and again...for no reason...the volume will spike to explosing levels for a few seconds. Thoughts?


A wild guess is that the soldering on the cold side of the volume control pot MAY be bad. When it vibrates and loses contact where it is soldered, the unit will go to full volume. Check soldering of ALL the pot leads into the circuit board. Look for a thin grey line around the lead part way up the menicus of the soldering.

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Hiwhat is the best way to connect my DigiTech RP10 to my Marshall MA100H Guitar Amplifier


Read your manuals for both pieces of gear carefully first. You only have one amp so you won't be able to take advantage of all the FX on the Digitech as a lot of them are designed for stereo. The Digitech manual shows guitar into the Digitech and output from the Digitech into input of any guitar amp. Since you have a Marshall and can already get some great sounds by running your guitar straight into the Marshalls input, you would probably be better off using your Digitech in the FX loop. Run a guitar cord out of the send on the loop into the input of the Digitech and a guitar cord out of the left / mono output jack on the Digitech into the effects return jack on the Marshall. Start out with the effects level on the Marshall all the way down. Do the same with the Digitech with both the input and output levels. (Read the manual carefully) I think the choice of the Digitech isn't that great because it is already trying to reproduce a lot of what you can already get with just your Marshall but with a little experimentation and some careful adjustments you should be able to add to the sound of the Marshall. Hope this helps.

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2 Answers

Problem of marshall g80rcd, volume drop when i play


It sounds like your volume control is dirty. You will have to disassemble the amp enough to get access to the volume potentiometer which is soldered to the circuit board. There will be a square hole in it that you can spray some contact cleaner into the control. Use only contact cleaner as anything else could damage the control. Use a small squirt and rotate the shaft. If this doesn't solve the problem you may have to replace the control. While you have it apart, examine the solder side to make sure all the solder joints are perfect especially those on the controls. A bad solder joint can also cause the same problem. Before you take the amp apart unplug the power with the amp on and the volumes turned down. This will discharge the capacitors so it will be safe to work on. I hope this helps.

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1 Answer

Where to buy an instuction manual from for my marshall amp.


Click Here For A List Of Downloadable Books And Or Write Them An E-mail And They Will Send You One For Free Or A Couple Of Bucks.
Sincerely,
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Marshall MG100 DFX manual


If you just bought it new, Marshall will replace any parts, or the store you got it from. If its second-hand I would have a look on ebay for parts.
The user guide can be found here...
http://www.marshallamps.com/product.asp?productCode=MG100DFX&pageType=DOWNLOADS

Good luck, its a sweet little amp!!!

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