I request Marshall MG100HCFX schematic

[Makuito]

Hello friends, I received a Marshal amplifier at the workshop which when turning the gain and equalizer controls they do not work but you can hear a screech over the sound of the guitar in the clean channel and you also hear something distorted, the effects work and so on. The channels are clean and distortion, I am suspecting the digital card and that is why I need the diagram, thank you very much in advance

[sugeda]

,,

[Makuito]

thank you very much sugeda