MAP and AAP can not be mounted together as they are too wide
Probably true. I'm adding all this things to the "spin2 improvements" file.
There are some tiny balls of solder stuck to the board in random places
I think i can't help it without a stencil for applying the paste. Spin2 will come with a stencil from ourpcb (in case I assemble them).
soldered across both of them for physical strength and hot glued in place to avoid vibration failure
Wussy
I would strongly suggest moving to mini USB
Yes, mini is on the way.
The to220 packages on one side are closer to the edge than on the other, this should be consistent.
True. added.
Two of the leads on one of my max chips are damaged from rework
. It was a memorable fight. Lucky I didn't had the hammer around.
I don't understand what the fuel pump + and - pins are for!
(-) is just ground. the other is what you want. probably unnecessary. However, the board needs more ground pins.
What about the three passives next to the FET, what are they for, why empty?
Probably is a snubber circuit. You don't need it.
What does DGP stand for? And AGP? What is the GP NTC pin for?
Those must be renamed. Figured that out when I saw the boards the 1st time. Digital General Purpose, Analog General Purpose, General Purpose NTC resistor input. It should be directly PH1, PJ3, AN12, etc. NTC or not should be selectable by bridging something.
What is the link between D3 and Q19 for? What are Q18,Q19,D3,D4,R2,C11,C8,C2 for?
You might wanna put D3, its a reverse protection diode. Q18-Q19 cuts the 12v supply for the big regulator, although one of them is too small.
R2= 1ohm resistor in series. The bridge you have bridges all that stuff.
D3 is connected between 12v and 5v. Its function has a name but i cant remember it.
The capacitors are for 12v and 5 supplies. 2200uF and 10uf.
I can't see specific ground connections, are there any or is it the connector boards responsibility to merge appropriate groups into external connections? Where should I ground it for bench testing?
Ground comes from the other board, I'd like to see more ground pins, though. Mine gets power from P5 and P3 (the unstandard header next to the fuses)
What are K+ and K- for?
Thermocouple
What are the four unlabled pins in the DIL header for?
Yes, they're NC. I don't understand how it ended with a different hole. Its corrected for Spin2, but i don't see how could that happen. Btw, the header fit if you push it hard enough ;-)
Do your INJ1-8 numbers line up with the CPU numbering
Yes, inj 1 = PB0, and so on. Not sure if its port B, but its the port used for injectors.
What are the two missing diodes on each ignition channel for? What about the 3 resistors and 1 capacitor on each GP FET?
Clamping and zener (ran out of 5.1v zeners). For GP: R-C Snubber and... umm the other is either the LED resistor or a 100k pulldown. I doubt its the unavoidable 1k resistor. Probably a mistake.
How do you configure the XOR chip and how is it configured stock?
Not configured yet. Populating one of the 2 resistors placed into the white box, you are pulling down/up one of the XOR inputs
What about the two resistors and two diodes between the fuse holders and FTDI chip?
LEDs. Mines doesn't flash :-(
What exactly does MCU fuse holder connect to?
To the upper board that provides the connector :-)
I assume the 11 missing components around the missing U31 stepper driver chip are related to it?
You're right.
What are D101 and D102 for? Also missing.
5.1v zeners.
U18 is the thermocouple driver, right? And some of the missing nearby components are for that, right? What about the rest? I know there are two resistors missing from the VR inputs, but there are a lot of passives missing in that region.
Yes, its for the thermocouple, and yes they are for that chip.
About the rest:They are all missing capacitors, used for filtering. You have 0805 caps there, practice some soldering;-). For example, MAP is already filetered, BRV too. check the schematic for that. It will work without the caps, you may see some avoidable noise, though.
There is a single missing component next to the map sensor with an unreadable mask, what is that for?
Its only a pullup for diagnosis (MAP signal goes to 5v in case of a brak cable), but it doesn't pull anything. It was a schematic error (from me)
perhaps a video of him doing it would show us how hard it is to do
It'd be a long,boring video.
I can't wait to try it out on the bench, and even more so, the car, later :-)
Come on! what are you waiting for?? :-)