Question about Marshall Amplification Marshall MG250DFX 100W Guitar Combo Amplifier

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Left input for loudspeaker is dead? speakers both work out the left but neither on the right. can I fix it myself? marshall mg250dfx thanks

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It sounds like the speaker output jack is broken or it has come unsoldered from the circuit board. You can fix this if you have enough electronics experience but you have to be very careful as components in an amp can carry a lethal charge even after being unplugged. You can partially discharge the capacitors by unplugging your amp from the power source with the speaker plugged into the working jack and set at a low volume while turned on ( not on standby ). If you feel at all uncomfortable attempting the repair yourself you are far better off taking it to a repair shop preferably one with experience with Marshalls. The same is true for other brands as well. Please let me know if this helps.

Posted on Nov 20, 2009

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  • Joshua Feb 09, 2011

    The marshall MG's and AVT amps all use the same TD7293 IC and the terrible cliff jacks. The inputs/outputs get gummed up or loose and start blowing fuses and sometimes even starts blowing the power ic's. I recently had to rework mine due to the exact same reason! Be very aware of the cliff jacks on these amps ... they even cause weird problems because they are used for the speaker output 1/4" as well.(the two or one 1/4" outputs on the back of amp that are usually red colored.)

    Good Luck!!!

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