I apologize in advance, I am a noob. I can't help it.
No problemo; this is a place where noobs can ask questions. No shame in that.
I need to pick these resistors up ASAP, and I don't know how to calculate them in PARALLEL (edit). The schematic I have uses different resistor values than I could get, and is not very "in depth". Original "schematic" is included as attachment if anyone's interested.
Also, DC input is 12V
**broken link removed**
Not sure what you're asking. I looked at your PFD, and it only shows 2 resistors, not in parallel with each other. (They're apparently being used as current limiters for the LEDs.) Too bad they didn't provide a proper schematic (circuit drawing) so we could see what they're up to.
It
looks like what this box does is switch between 2 musical instrument inputs through the 1/4" jacks, and at the same time illuminate the LED corresponding to that input so you know which one is active. Is that correct? Pretty simple.
OK, figured it out. for the red LED, since you need to "drop" 10 volts, you need a 500Ω resistor (10/0.02): for the other LED, a 435Ω one. This is a non-standard value, so use the next larger standard one (470).
These values are not critical. They simply limit the amount of current that can flow through the diodes. So two 500Ω resistors will be fine.
If you can't find these values, get the next larger size or so.
So why does your document give such large values for these resistors?