These are assembly instructions for the THT V1 Desktop style kits. They are all very similar, with resistor packs and regulator adjustment resistors all labeled the same.
There are either no SMD parts (presoldered) or only five SMD parts in your kit.
The first things to ensure are in the right places are the regulator resistors. You will notice there are different sizes, this was done to ease assembly. The smaller resistor is R2. There are two larger resistors, and here is how you can tell them apart. The resistor to put in position R1 has its yellow stripe in the middle of the resistor. Picture for clarity:
Take care to align your voltage regulator (U1) such that the hole is lined up with the PCB hole. This is for a mounting screw, to hold the regulator in place against the PCB where there is a heat dissipation pad and area. A mounting hole is located here on the included bracket.
Next, check the orientation of the diodes. Stripe-side faces the fuse (F1, round tan disc).
The termination resistor packs can optionally be hard-soldered in place (always on), but it’s better to use the little black socket strips (note: these are just a DIP-20 socket snipped in half). I like to solder the sockets with the cut parts facing the pill module (blue pill, black pill, or green pill) but that’s up to you.
The SCSI socket needs to be soldered such that the notch in the socket is on top of the word ‘notch’ on the PCB.
The only other important thing is the termination resistor packs. Those must be installed as follows:
* In position RN1, the text on the resistor pack faces the SCSI port
* In position RN2, the text on the resistor pack faces *away from* the SCSI port
Example photos to be sure terminator installation orientation is clear:
Other than these things, orientation is pretty obvious. The USB marking on the PCB is where you locate the USB port on your pill module (blue pill, black pill, or green pill).
Be sure you solder on the USE_TPWR header if you intend to run from SCSI termination power.
Your LED resistor goes in position R3 or R19 (forgot to update the silkscreen label on some of the PCBs). You can either use the included 2.54mm header for your LED plug, or solder directly onto the LED wires.