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Summary of Contents for hexinverter SYMPLESEQ MKII
- Page 1 HEXINVERTER.NET presents sympleSEQ mkii dual eurorack analogue sequencer Assembly Manual v1.0 This assembly manual applies ONLY to the DUAL EURORACK PCBs! (not the universal style)
- Page 2 This guide is only for the black coloured dual eurorack PCB set. Please see the hexinverter.net project site for the “universal” style white PCB assembly guide. If you are wondering what sympleSEQ is and what features it has, I suggest User Manual over at the hexinverter.net project site...
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Page 3: Logic Board
Assembly Before you get started, check over the contents of your kit against the Bill of Materials found on the hexinverter.net project site to make sure everything is there. There are a lot of parts! If anything is amiss, please email me immediately and we will sort it out: hex[at]hexinverter.net... - Page 4 Step 1: Diodes Install the diodes in the logic board, being careful to observe correct polarity. Step 2: Resistors Install the resistors in the logic board. If you bought a kit from me, the resistors should have their values marked on the cut-tape packaging.
- Page 5 Step 3: IC Sockets Install the IC sockets in the board (being careful to line the notch up with the markings on the board). I like to seat them all in their place at once, then take something flat like a large book and sit it on top of the sockets.
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Page 6: Step 5: Voltage Regulators
Step 5: Voltage Regulators Install the 78L05 and 78L10 regulators in their places on the board. Be careful not to solder these for too long. They can be damaged from exces- sive heat. I recommend taking turns for each regulator, soldering only one leg of them in at a time. -
Page 7: Step 7: Electrolytic Capacitors
Step 6: Headers Break four sections of three conductors off of the .1” male 40pin break- away header and solder them into the “LEVEL JUMPERS” area of the PCB along with the eurorack power header at the bottom right. Make sure to install the jumper selectors on the Level Jumpers after soldering them in. -
Page 8: Control Board
Control Board The control board is where things get a little tricky! The control board houses all of the control surface parts for sympleSEQ Dual Eurorack. Step 1: Preparation Unfortunately, the potentiometers used in this design require you to cut the shafts to the proper length for the knobs we are using. - Page 9 Next, take the two 40pin headers and clip them down to 34 pins each (be- ing careful not to bite off too much material/pins). These headers will connect the logic and control boards together in Step 3. Connect the two headers together like pictured once you have done this.
- Page 10 Step 2: Diodes/Resistors Solder in the diodes and resistors, being careful to install them the right way. All of the resistors are 10k. These are the current-limiting resistors for the LEDs, so, you may want to adjust them to change the brightness of the LEDs by testing your chosen LEDs with a ~12V source.
- Page 11 Step 3: Inter-board Connect Headers Connect the control and logic boards together using the two sets of 34 pin headers you prepared earlier. Situate the boards together with the headers installed and flip the board over with the control board facing down. Now “tack”...
- Page 12 Once everything is aligned properly, solder the remaining pins... Step 4: LEDs + Potentiometers Install but DO NOT SOLDER the 16 LEDs into their LED board spacers. Place them into the control board, being careful to orient them correctly. Bend the legs out so they do not fall out when the board is flipped over.
- Page 13 Now that you have placed the pots in the board, hold the board up and bend each of the outer potentiometer legs with a pair of pliers so that when you flip the board over to solder, the pots will not simply fall out... DO NOT SOLDER ANYTHING YET!
- Page 14 Step 5: Jacks + Switches Install but DO NOT SOLDER the jacks and toggle switches into the control PCB. IF YOUR KIT HAS KOBICONN JACKS (TAN-COLOURED PLASTIC BODY), LEAVE THE ROUND NUT ON THE JACK WHEN YOU INSTALL THEM. THIS ROUND NUT WILL ACT LIKE A SPACER.
- Page 15 Step 6: Panel Fit + Begin Soldering Now it gets a little tricky. Place the panel over the control PCB’s com- ponents just as it will be seated in the final module. I recommend tak- ing four of the nuts for the jacks and screwing them on to hold the panel in place.
- Page 16 Inspect each potentiometer after re-heating and make them as straight and uniform as possible... Once you are happy with the potentiometers, solder ONE LEG of each jack, and adjust them as well. Next, solder ONE LEG of each of the LEDs, being careful not to overheat them.
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Page 17: Step 7: Toggle Switches
Step 7: Toggle Switches Prepare the toggle switches for soldering by making them flush with the panel. Finger tighten the nuts for each of the switches and push the switch against the panel as shown. NOTE: if you are using KOBICONN (tan coloured body) jacks, you might not need to lift the switch off the PCB at all. - Page 18 Step 8: Pushbuttons Install the two red pushbuttons in their place. Solder ONE LEG in and then re-heat, pressing the pushbutton flat against the PCB with your finger. Once you are happy with the placement, solder the remaining three legs of each pushbutton.
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Page 19: Final Assembly And Testing
Final Assembly and Testing Almost there! Time to wrap up assembly of your your sympleSEQ and test it! If your kit has KOBICONN jacks, you will need to run a ground bus wire for the jack grounds, like this. Connect one end of the ground wire to a ground pad on the PCB, as shown here. - Page 20 Attach the logic and control boards together: Time to install the ICs in their sockets! Bend each IC’s legs in a bit on the table so that they fit nicely into the sockets. Be gentle! Install the ICs in their sockets, double checking that each IC is aligned properly.
- Page 21 Now you can test your sympleSEQ out! Be sure to install the power cable correctly, following the Doepfer Eurorack standard: Now, go to the hexinverter.net project page and download the User Manual if you do not know how to use the sequencer yet (click): http://cv.hexinverter.net/?projects=sympleseq-v20-eurorack...
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