Fried Marshall MG100HDFX! PLEASE HELP!!!

[Mars Amp Repair]

MF - duly named

I hesitate to even TOUCH an MF350.

yeah Enzo, someone had a premonition when they decided to name it the MF-of amps g

[quazcha]

Hello Mars, What is the theory behind the diodes? What is their function?

[Enzo]

Just like the flyback diodes in tube amps. If a spike happens, if the spike is ever larger than the power voltage, then those diodes will start conducting, preventing current from flowing backwards into the circuit and damaging th semiconductors.

[seniorguitarro]

MG100HDFX. Fuse Blown, Fan Fried.

My fuse recently blew in my mg100hdfx head. I replaced it with the same one and it didn't blow, but the fan began to burn. Does ANYONE know how to fix this? Help me PLEASE!!!!

[Enzo]

Hi seniorguitarro, welcome to the forum.

Please start a new thread for your amp. More people will notice that and respond. This is a long old thread here.

First place I look in those amps is the power amp module on the heat sink.