I think I just smoked my Amp

The schematic shows two fuses. Most likely, one is at the power cord, the second is probably a rail fuse- which is located inside the amp.

I am with Ralph on this,  one or both fuses may have blown. Just try replacing them. (Of course, you can look at them and see if they are blown, too).

If a capacitor blew, you would see a darkened spot on the board or a distorted piece. 

I unintentionally shorted my McCormack amp once, and Pat and Steve guided me through the diagnosis. Yup, I blew out the rail fuse/s.

When my Ayre amp suddenly died, Ariel asked me to look inside- When I showed him the blackened spot in the amp, he said ship it back to repair the capacitor.

Have you checked you speaker connections/interconnects? Anything that might have grounded the signal?

Bob

if you blew a fuse -- or anything else that quickly either you have a coincidence, ro, i suspect, you shorted something liek a speaker wire, and that short likely is still there.  Check carefully.  In fact begin withe the speakers disconnected. if you hapen to own a VOM, with everything off, and ideally, but not reqyired, with the wires disconnected form the amp (its off, right?  and has been for a long time, right?) measure the resistance across the speaker terminals.

i lso dont think the discussion on 2 fuses above sounds right. You almost certainly have one line fuse on the 117 VAC (house power).  Other fuses woudl either be rails (+ and - power supplies) or speakers. Both are in pairs.  So i can see 3, btu not 2.  If there are really two , i suspect both are power/lie one for supervisory o similar power and very small.

If I remember, you recently purchased that unit used from a nearby dealer. Phone them for advisement.

Thanks to everyone who took the time to respond. The status of my D400 remains unchanged. Visual inspection didn’t reveal any possibility of shorted speaker cables.

I spent most of the day driving to retrieve my CODA amplifier from storage; maybe I should store my things closer to where I actually live 😐

I’m going to figure out how to open the case, and run down those fuses.

@bigkidz I appreciate the offer, but am located in Oregon, and trying to avoid shipping this amp if at all possible (no original packing materials). Coincidentally, my speakers were shipped from NJ.