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My Marshall MG15FX input Jack fell inside the amp. I took out all the screws and tried taking out the back of it but nothing worked. Please help!

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Kay it might be the head phones buy a new pair and see what happens. If it doesn't work I must advise that you do not open it and tamper with it because then you cannot take it back. I suggest you send it back to woot for another one

Posted on Jan 08, 2009

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SOURCE: my marshall mg100 combo took

Yep! These poor quality jacks become "unriveted" and break in half. This is a fairly common occurence. Don't be afraid to unscrew stuff. USUALLY the corner protector screws are NOT necessary to take out. OFTEN the screws for the handle need to come out and any other screws from the top and the sides in the vicinity of the amp portion need to come out. Just keep track of where they go. The jack MAY be a part of the circuit board and you will need to get an exact replacement. NOTE: If it is mounted on the circuit board do NOT overtighten the panel nut as that can "de-rivet" the brand new jack !!! They are really poorly made...

Posted on Apr 06, 2011

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Marshall mg15fx no sound coming. only sound i get is buzz when switching the master volume knob. pls help me.


Hi, I have repaired loads of these kinds of amps. The first thing to check is if the input jack socket is still soldered to the circuit board properly. These have a tendency to break.
They all have a dual opamp and a 15 watt power amp chip. Invariably it is the power amp chip that fails IF it is an electronic fault. Both chips can be bought for a few pounds.
The variations, aux input, spring reverb and this, digital effects are extremely unlikely to cause this kind of failure.
At one time anyone with a screwdriver and a soldering iron could fix these, but in the days of health and safety, find someone who knows what they are doing.
It should take half an hour and about £3 worth of bits.
All the best, Chris the Fader.

Jul 04, 2014 | Marshall Amplification Marshall MG15 15...

1 Answer

Marshall mg15fx. no sound coming. the only sound i get is buzz when switching the master knob.


I would test by first trying a different guitar cord. If the fault is still there, try jumpering the effects in and out jacks with a patch cord. If there is sound now, clean the two jacks with contact spray and working a 1/4 inch plug in and out of the two jacks.

Jul 04, 2014 | Marshall Amplification Marshall MG15 15...

1 Answer

MARSHALL FOOTSWITCH FOR DSL100 TROUBLES


Does your M foot switch work on the Fender? If you know how to use a multimeter you could check continuity by putting meter leads on plug of M foot switch(1 on tip, 1 on sleeve ) You should see a change in the multi meter when you depress switch. If so switch is good. Another easy test is with cap off a spare 1/4 plug -plug it in to foot switch jack.put a alligator or some such metal clip or wire and join(called short or shorting) the two inputs . If connecting and unconnecting results in switching then the foot switch is suspect. One fairly common thing is that foot switch and input jack are often sautered straight to a circuit board to save $ on production cost. Used to be all point to point where a wire was attached to 1/4" input and then wire went to circuit board or tubes. The wire has give, but not so with direct wiring to board. So the nut holding the 1/4" amp input gets loose(doesn't have to be loose for the following to happen) and a pull on the chord causes a break in the soldier and thus a break in the sound chain. Sometimes it will work intermittingly by putting a little pressure left, right, up or down on the plugged in plug. If so, it's the input jacks connection to the amp. If not it still could be that because putting pressure on plug may not be sufficient to affect a temporary reconnection. Since switch(the new one you made)works on Fender, but not Marshall I suspect the jack or foot switch circuitry past the input jack. If using some of the above the above tests leads you that direction,remove housing(unplug a/c power 1st ) inspect jack,wiggle it slightly see or feel a break then resodier from back side. You should be able to use the soldier already present without adding extra.

Sep 27, 2017 | Music

1 Answer

Marshal mg15fx : Noise when i connect the amp to a mixer.


Mixer uses balanced outputs, this unit does not... Also ground loops can be a problem. Make sure this and the mixer are BOTH powered from the same receptacle. The next problem is that the level of the mixer is MUCH too high for an amp designed to recieve guitar signals if you are sending a mixer into this. It is NOT clear how you are connecting this to a mixer... IF you happen to be trying to send signals from this to a mixer, either use a mic OR use a Direct Input box. You should tell us exactly how you are connecting this to the mixer since there are MANY ways, and most do not make sense.

Aug 07, 2011 | Marshall Amplification Marshall MG15FX...

1 Answer

My marshall mg100 combo took a spill now the front of the input jack came off and the jack itself fell back inside the amp. I don't want to just start unscrewing stuff. whats the proper procedure to get...


Yep! These poor quality jacks become "unriveted" and break in half. This is a fairly common occurence. Don't be afraid to unscrew stuff. USUALLY the corner protector screws are NOT necessary to take out. OFTEN the screws for the handle need to come out and any other screws from the top and the sides in the vicinity of the amp portion need to come out. Just keep track of where they go. The jack MAY be a part of the circuit board and you will need to get an exact replacement. NOTE: If it is mounted on the circuit board do NOT overtighten the panel nut as that can "de-rivet" the brand new jack !!! They are really poorly made...

Apr 06, 2011 | Marshall MG100HDFX 100-Watt Amplifier Head

1 Answer

My input jack's nut has came loose and it fell into the amp. HELP


Open the unit and restore the jack to the proper place. Do NOT overtighten the input jack mounting nut.

Feb 01, 2011 | Marshall Amplification Marshall MG15 15...

1 Answer

Okay i need to know how to get inside my amp to tighten up my input jack cause i cant play at all on my amp cause i cant get inside it i took off all the screws in the back and trying to get it off is a...


One can overtighten the input jack and "un-rivet" the jack. They are not made very well !!! OFTEN when they appear loose, they HAVE un-riveted the threaded sleeve from the metal inside the jack... that USUALLY requires REPLACEMENT of the jack itself.

The cabinet backs on a lot of these have to be PRIED out as the Tolex covering often makes them tight.

The amp portion is often retained by screws from the top and or sides AND even the two holding the handle on... there are many different configurations. Sometimes the amp comes out the front, sometimes the back. It is easy to shear off the speaker wires when removing some of them.

Dec 18, 2010 | Marshall 15 Watt Guitar Amp

1 Answer

Where is the serial number on my marshall amp mg15fx


Behind the amp, right around where the power-supply is. Usually the right hand side at back of amp. Serial numbers are labeled as: S/N########

Mar 14, 2010 | Marshall Mg15dfx 15-Watt Combo Guitar...

2 Answers

The input jack on my Marshall MG100FX has fallen into the amp case......how do you access the case to retrieve


I just had this problem and wasn't able to find the solution on line, so, here 'tis.

Take off the six screws on top of the amp cabinet. Unplug the speaker plug from the amp jack.The metal amplifer box can now be pushed out of the back of the cabinet and the input jack remounted. I had to force the box a bit as it was glued in just enough to tack it into place. (I was afraid to force the electronics box out so I took the entire cabinet apart piece by piece until I could see there was nothing left holding it in.) I found that prying it this way and that with a butter knife helped crack the glue.

Dec 16, 2009 | Marshall Mg100dfx 100-Watt Combo Guitar...

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