Hello,
A friend of mine brought me a marshall MG30Fx to fix it.
It had 2 problems. It had always effects playing (phaser or chorus or delay etc.)
And the other one was that master volume pot made some noise.
I changed the master pot and it fixed the second problem.
I made the assumption that the pot for effects was shot too so I replaced it.
When I reconnected everything I made the mistake and connected the fx board the wrong way so the amp didn't make any sound. I changed the wiring and after the replacement I opened the amp and I can't really change anything except the master volume. All 4 leds are lighting (clean, overdrive, tap and store).
Amp doesn't respond to any of my changes (pot turning, button pushing)
Anyone has any clue?
A friend of mine brought me a marshall MG30Fx to fix it.
It had 2 problems. It had always effects playing (phaser or chorus or delay etc.)
And the other one was that master volume pot made some noise.
I changed the master pot and it fixed the second problem.
I made the assumption that the pot for effects was shot too so I replaced it.
When I reconnected everything I made the mistake and connected the fx board the wrong way so the amp didn't make any sound. I changed the wiring and after the replacement I opened the amp and I can't really change anything except the master volume. All 4 leds are lighting (clean, overdrive, tap and store).
Amp doesn't respond to any of my changes (pot turning, button pushing)
Anyone has any clue?
Please post a gut picture showing the PCB, so we know what are we dealing with.
Old MG30DFX was basically an analog preamp with an effects card; fear the modern FX one is a fully digital one with everything (except power amp) being done via DSP.
At least does it work, reach full power?
Old MG30DFX was basically an analog preamp with an effects card; fear the modern FX one is a fully digital one with everything (except power amp) being done via DSP.
At least does it work, reach full power?
I suppose thats a fully digital amp. Input goes directly to fx chipset. 2 multicanal cables (I think thats the term for those cables) are then going to the pots and power amp.
My assumption that its a fully digital amp (except the power amp) is that all the pots are 10k linear.
Photos of the guts are coming
My assumption that its a fully digital amp (except the power amp) is that all the pots are 10k linear.
Photos of the guts are coming
Sorry for the 3 replies in a row. I am thinking to keep the power amp and make a preamp section.
Any suggestions?
Any suggestions?