I am trying to fix a Crate CR-IIR that I recently acquired. I have dug up quite a few schematics, but am not sure which one would be well suited since I have not found the one of the exact make and model.

As of now, the amplifier will not power up. The 2 amp fuse blew, and upon inspection, it looks like some of the diodes were burnt up, but most of the parts are not charred. I have gone through sections of the amp with my multi-meter and continuity tester.  There are three perf boards. One looks like the preamp and tone stack to me. The The second is part of the power amp I believe. The third is the caps that go out? I'm not really sure.

I have experience with building kits and circuits, but have never really gone through troubleshooting a circuit, and have been doing a lot of reading on this as of lately.

Any help or advice would be greatly appreciated. I really happened to like the sound of this amp until it went up in smoke!

P.S. I don't know if pictures of the circuit board would be helpful, but I could post them as well since I don't have the original schematic.