Thank you for purchasing the MST Dual 2164 AC/DC VCA Eurorack module kit! This is an intermediate to advanced build and not recommended for the beginner since it has a lot of tight fitted parts. If you feel like you can handle it please proceed! If not, get some help from a friend with experience or purchase a fully completed unit.
ATTN: Please follow the BOM and these instructions and don’t populate from the PCB alone. Also sometimes we cannot get the exact pictured components, so please look over your parts and check the codes first. Lets begin with the MAIN Board.
Start with the diodes as shown below, then turn over on a firm surface to solder, then clip your leads. Diodes are polarized components so you must match the black stripe on your diodes with the white stripe on the PCB silkscreen.
Populate first, then turn over on a firm surface to solder and then clip leads.
Place the IC Sockets by aligning the notch with the notch graphic on the PCB Silk Screen. Turn over on a flat surface and solder into place.
Now populate the capacitors as shown below. These caps are not polarized. Turn over on a flat surface to solder and trim.
Next, make sure you orient the electrolytic capacitors in correctly. The longer lead needs to be inserted into the hole that has the “+” marking near it. Solder and clip.
5-PIN MALE HEADERS
Now populate the 5-pin headers as shown below. Carefully turn over and solder.
Next, Carefully insert the ICs into their respective sockets, following the BOM
Populate the trimmer resistors on the rear of the PCB as shown below. Turn over to solder and trim.
16-Pin Shrouded Power Connector
Next add the 16-Pin Eurorack Power Connector in place by matching the key notch with the key indicator on the PCB silk screen.
5-PIN FEMALE HEADERS
Now add the 5-Pin female headers to the rear of the control board as shown below. Turn over to solder, then trim.
JACKS, POTENTIOMETERS & SWITCHES
Now PLACE (do not solder yet!) the jacks switches and potentiometers in the circuit board as shown below. Make sure to remove ALL the nuts and washers from your switches before panel placement.
Now place the panel over the jacks, pots & switches.
Now fully tighten (not too hard) down the nuts on the jacks, pots and switches.
Now you will need to move the panel (please be careful and take it slow) in order to make sure that it is level with the control board. This will involve pulling the pot leads and clamps out of the board just a bit. Take your time and get this right!
Now carefully turn the board over and solder the pots, jacks and switches in place.
Now Carefully! connect the two boards together and NOW you are ready for testing! Plug your power cable into your Eurorack power supply and test away.
OPTIONAL BOARD TO BOARD GLUING
After you have fully tested your unit and have determined that it is in full working order, you can use some super-glue to bond the board to board headers together. This is an optional step, but will help keep the boards together as you pull the module out of your case. Make sure to not over-glue as you may still need to pull the boards apart in the future. After that, you are ready to use your module with full confidence. Thank you for choosing Synthrotek!