Echo Blue Delay - arsonistic tendency. Help not needed any longer [SOLVED]

[VidSicious]

Hey guys, hope you all have some great projects going. I on the other hand, got stuck and left scratching my head. Terrible...

Recently I bought Fuzz Dog's Echo Blue Delay PCB for my first professionally manufactured PCB build. Up until now I made 10 or so projects on veroboard which all work very well. I've had many different issues in the past but nothing like this. And it stops me from testing it further. I'm sure it's something simple and stupid but the pedal needs to be built asap and for the love of god, I cannot figure out what is up with it!
So the deal is, there is no signal coming through whatsoever. I started debugging the circuit and got nothing UNTIL. I accidentally touched one of the resistors and got burned. It was lit! Well, not literally but it was hot as fire. I triple checked all the polarities of the components, replaced all the wires, replaced the burning up resistor and still nothing. As soon as I engage my test box (which is working absolutely fine, just checked it), that one resistor just starts heating like a rock in a desert. I tried audio probing but decided not to as I don't want to fry the entire circuit. The only other difference I have apart from the two resistors in series is the regulator. It calls for 78L05 and I've got L78L05. The pinout should be the same, right?

Below is the documentation and schematics for the pedal and the resistor frying is the 33ohm or R20 (I've placed 24R and 10R in series). Here are some pictures of the top side of the board too:

GALLERY

SCHEMATICS

Any help would be greatly appreciated!

[induction]

You have D1 in backwards.

[Kipper4]

If things are getting hot it could be a power supply short. Especially if the r20 burnt.
Check the orientation of your reverse polarity diode maybe.

Edit

Induction beat me to it.

[VidSicious]

Thanks for such quick response guys! D1 backwards?  I thought the square pad meant + and the strip on the diode meant - which means it should be the right way?

EDIT: ah crap now I see it on the layout there is the strip on the square pad. My bad! I got ahead of myself there... I'll replace it and report back! Thanksss!

[induction]

I thought the square pad meant + and the strip on the diode meant - which means it should be the right way?

Normally yes, you want the strip on the diode to point towards negative. But this is a polarity protection diode wired in parallel. It's function is to prevent current from flowing unless the power supply is reversed, in which case it should shunt current to ground*. So it's intentionally wired the reverse of what you'd expect.

* Not a the best scheme, as you have seen, although very common. "Protecting" the circuit often either burns a hole in the board and/or one or more components, or kills the power supply. Some combination of these alternatives would have happened to you if R20 was omitted, which is also very common. Inline protection diodes are usually a better option.

[VidSicious]

Thanks so much guys! I revered the diode and it fixed my silly mistake. Didn't know you can get fuzz out of a delay pedal. Pretty rad!