Eurorack Distro Board

Eurorack Distro Board

Thank you for purchasing the Synthrotek Noise Filtering Eurorack Power Distribution Board.  This is an intermediate build. You will need a fine tip soldering iron, a very steady hand and experience.  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 or these instruction pictures alone. Also sometimes we cannot get the exact pictured components, so please look over your parts and check the codes first.

Lets begin!


Populate the 3 resistors then turn over on a firm surface to solder and clip leads.

Distro Board Resistors

Distro Board Resistors


LEDs are polarized components, make sure you place the cathode (shorter lead) into the pad with the flat side of the silk screen marking next to it. The flat side of the silk screen is the side adjacent to the callouts (LED1, LED2, LED3), so the shorter lead should go into the hole next to the callouts. Do this for all three, turn over to solder and clip leads.

Distro Board LEDs

Distro Board LEDs


Next add the 16-Pin Eurorack Power Connectors in place by matching the key notch with the key indicator on the PCB silk screen. Turn PCB over to solder.  You can populate all of the connectors first then flip the board over with practice. This helps to keep the connectors flush to the PCB. There are a lot of pins to solder and this will take time.  Make sure you do not leave your soldering iron on the pins too long and do not press down on the pins as this can damage the connector.

Distro Board 16-Pin Power Connectors

Distro Board 16-Pin Power Connectors


Place the capacitors in the PCB, solder and clip leads.  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.

Synthrotek has added these power conditioning / noise filtering caps in 3 places on our distro boards to filter both incoming power as well to reduce module to module noise on all 3 rails (+12, -12 and +5).

Distro Board Power Filtering Capacitors

Distro Board Noise Filtering Capacitors


Distro Board Molex Connectors

Distro Board Molex Connectors

You now have the choice to either use the Molex connectors or bare 16 AWG wire for connecting the distro board to other distro boards and/or the power supply module. If you are looking for a more permanent solution or do not want to use the Molex connectors just solder the wire directly to the PCB in their respective marked pads. Synthrotek has 3 ground connections, but if your supply or non-Synthrotek brand power modules have just one ground connection, feel free to just use the one.  If you are using our Molex connection cable system, populate the right-angle Molex connectors to both ends and solder.

Final Distro Board with Molex

Final Distro Board with Molex

CONGRATS! you have now finalized your power distro board(s)!  You can now connect your DC power and test out the boards.   All 3 green LEDs should light up.  If you are having any issues please consult our TROUBLESHOOTING GUIDE.

Thanks for choosing Synthrotek!

Final Eurorack Distro Board

Final Eurorack Distro Board


  1. John says:

    Hi. I’ve got a few of these distro boards with the Deluxe Power 3U module. Am I able to use the 1U Power Panel (from the more recently released Case Power system) with this board? I want to free up the hp space and use my very empty 1U rail. Thanks!

  2. Steve Harmon says:

    Hello John,

    The 1U power tile won’t work for the distro board. the 1U and 3U tiles are specifically for case power since that is a power module and a distro board.

  3. Jean-Sebastien Nicol says:


    I have two finished noise filtering busboard and a super power green.
    My 90w universal ac adaptor (I live in north america) is set to 15 volts. All the supporosed leds are lighting. The tested power on the two distros are:

    +12 = 11.94 volt

    +5 = 4.93 volts

    -12 = -12.02

    Is it ok if the +12 and + 5 rails supply just under the needed voltage?


  4. Daniel Daly says:


    I recently completed my Noise-Filtering Power Distribution board. It seems to work perfectly, but I noticed that the CV pin is sitting at +5V with no modules connected to the board. Is this normal?



  5. Steve Harmon says:

    Hi Dan, what kind of solder did you use? If it is washable, I would certainly wash your board.

  6. Daniel Daly says:

    Far as I know it’s washable. I could do that, but I don’t measure a short (with my meter) between those two connections. What’s the normal level of CV supposed to be with power applied to the distribution board but no modules connected?

  7. Steve Harmon says:

    Hi Daniel, there should be no voltage on the CV bus unless you send something out on it.

  8. Daniel Daly says:

    Okay. I’ll look for a short. Thanks, Steve.

  9. Steve Harmon says:

    BTW, I HAVE seen this issue with unwashed boards, just a heads up

  10. antonio says:

    What size female molex connector is that? I have wires already that I plan to use but I don’t know what size of mal molex connector to buy along with crimp pins? Also, do the male 6-pin molex connectors that synthrotek sells come with crimp pins to input the wire?

  11. Synthrotek says:

    Hey Antonio! here is the link to the female molex connector data sheet:

    Yes, our male molex connectors come with 6 crimp pins each.

    Hope this helps,

Leave a Reply

Your email address will not be published. Required fields are marked *