Looks like the protection diode did what it was supposed to do, at the expense of its own life. That's good--a 15 cent diode vs. the price of a new DE7 sounds like a pretty fair tradeoff.
What you need is a 1N4003 diode, though a 1N4002 should work just fine if you can't find one. You don't need the higher voltage rating of a 1N4003 in a 9V pedal, and that's the only difference between the two types, AFAIK.
It should be installed so that the stripe on the diode is facing toward the edge of the PCB, i.e. away from the red LED adjacent to it. As long as your "incendiary event" didn't take out the traces underneath the diode, it should fire right back up. When you get the old diode out, try to clean up the board the best you can. Dont use anything too sharp or abrasive, since that could damage the traces, which may already be embrittled or partially lifted by the heat. Try to get the solder pads on the back as clean as possible, or the solder might not adhere.
Oh, one other thing you should do, too. Pay attention to your AC adapter polarity from now on!!!
oke :reallymad:
