Question about Marshall Amplification Marshall MG50FX 50 Watt Combo Guitar Amplifier with FX and MP3 Input

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Marshall mg50fx pcb is broken

I need some another pcb for my amplifier, Its broken and i can`t fix them. Pls let me know how much cost the pcb.

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  • Emre. Feb 27, 2012

    maybe you need more details about my problem. If you asking somethings about that then i`ll answer your quastion...



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I had this Amp for almost 4 years now, and suddenly got a problem a month ago. When I'm using it from clean sound it suddenly auto switch to distortion sound and vice - versa .

Normally that would be caused by a dirty footswitch jack or a broken (intermittant) cable on the footswitch itself. If neither of these is the problem, it will be a relay in the amp and will have to go in for service. Here's a link

Oct 23, 2016 | Marshall Music

1 Answer

The power switch on my Marshall 250dfx popped out and i dont know how to fix it? any help please?

you see that your amplifier's on off switch is push to on/push to off type. what came out of the amplifier is the knob which is pushes the actual switch. try to fix that knob from out side. if you are not able to fix it, put a plastic pen into that hole & try to push the switch. by this way you can put on your amplifier.

Sep 26, 2011 | Marshall Amplification Marshall MG250DFX...

1 Answer

How to connect the foot switch.

Using the CORRECT footswitch for this model, you just plug it into the footswitch jack. You MUST use the correct one for the model.

Aug 05, 2011 | Marshall Amplification Marshall MG50FX 50...

1 Answer

I have the Marshall MG100HDFX 100-Watt Amplifier Head, the fuse was blown and there is no audio coming out of the the spkr jacks. this is how i received the amp and have no further info to diagnose. im...

If the output transistors have shorted, it is LIKELY that several others in the drivers and even farther back have also gone. HOWEVER some Marshall amps use one or more TDA7293 chips. These require installation using heat sink compound. The TDA7293 can be found at:

They come in two sexes depending on which way the leads are bent for installation. You have to see how yours are mounted relative to the circuit board. Cost about $6.

Apr 24, 2011 | Marshall MG100HDFX 100-Watt Amplifier Head

1 Answer

I have an MG50FX amplifier that is less than half a year old and in the middle of playing the distortion will fade to the point of disappearing and will then suddenly come back in the middle of a note. ...

Many things can cause this... A COMMON problem is broken solder joints near potentiometer where they attach to the circuit board. Look for bad solder joints and also cracks in the circuit board.

Apr 04, 2011 | Marshall Amplification Marshall MG50FX 50...

1 Answer

Constant buzz. even with no guitar plugged in

This usually indicates that your neutral and live are backwards. Try plugging the unit into a different outlet elsewhere (different room)
If it still is buzzing, look for a GOUND LIFT switch in the back, it may have inadvertantly gotten flipped to the wrong position.

Feb 27, 2011 | Marshall Amplification Marshall MG50FX 50...

1 Answer

My new mg50fx has a ton of hiss when i turn it on. anything i can do?

Make sure the master volume is turned up and the inout gain is down some.

All of the electronic devices suffer from the statistical noise within the amplifying components. Keeping the inour gain down some tends to limit the gain where the hiss is most sensitive, that is the high gain in the "front end" or preamp section.

A "ton" is not a MEANINGFUL measure of the loudness of the hiss.

A meaningful measurement would be the Db relative to the normal program material.

Test with no devices plugged into it as the preamps in guitars can create hiss too. The hiss should be barely perceptable at 5 feet from the amp.

May 04, 2010 | Marshall Mg50dfx 50-Watt Combo Guitar...

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