My own suggestion is to pull the chassis out so you can work on it while powering it. It may end up the person looking at it is going to need to rely upon their general knowledge. Marshall 3210, Lead 100 Mosfet, Guitar Amplifier, with Spring Reverb, Vintage See more like this.įishman iis you best bet You can download the user manuals, they do have a block diagram, but the scan is pretty bad. I did some research and found it was a Solid State Lead 100 Mosfet, 3210, 100 watt, 2 channel amp. I had never heard of it and the serial number put it as a 1990. I took a look and asked him what he wanted for it. What caught my eye was a Marshall head sitting in the back. A buddy of mine now has a pawn shop and I dropped by to check it out.