Division 6 CEM3340 VCO Manual

CEM3340 VCO Build Instructions
Make sure you have everything before you start soldering!
1
Install Diodes
What You’ll Need:
Build the main board rst. To make assembly easier, we’re going to install
components from shortest to tallest. This way when you ip the board over to
solder them, your work surface will hold them in place.
Let’s start with the diodes. To prep the leads, hold the body of the diode and
bend the two leads 90 degrees.
Insert the diodes into the holes marked D1 and D2 on the main PCB. Polarity
does matter for diodes, so when you insert them into the board, make sure
the black stripes on the diodes line up with the stripes on the silkscreen
pattern.
Bend the leads outward underneath the board to hold the diodes in place.
Flip the board over, solder the diode leads, then trim them just above the
solder joint.
For a quick soldering tutorial, visit division-6.com/solder
·CEM3340 VCO Kit · Soldering Iron · Solder · Wire Cutters · 9mm Socket · 10mm Socket
2
Install Resistors
Working one value at a time, prep the leads of the resistors like you did with
the diodes.
Insert the resistors into their proper locations (see BOM). Polarity doesn’t
matter for resistors, but your board will be easier to troubleshoot and look
neater if you line up all the tolerance bands (gold) the same direction. Bend
the leads outward underneath the board to hold the resistors in place.
Flip the board over, solder the resistor leads, then trim them just above the
solder joint.
3
Install Ceramic Capacitors
Install and solder C1, C2, C3, C4, C6, and C7. Polarity doesn’t matter.
4
Install IC Socket
Insert the IC socket into the board. Note that one end of the socket has a
notch in it to indicate which end of the IC has pin 1. Make sure to align the
notch with the notch indicated on the silk screen pattern.
Flip the board over and solder one pin on each corner of the socket. This
makes it easy to reposition the socket in case it isn’t seated all the way down
against the board; just reheat the corner pin and adjust the socket position as
necessary.
Once you are happy with the positioning of the socket, solder the remaining
pins. The pins are short enough that they don’t need to be trimmed.
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Polarity doesn’t matter
Polarity DOES matter
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CEM3340 VCO Build Instructions
8
Install Right-Angle Header
Insert the right-angle header into the control board as shown, making sure it is
straight. Solder it into place. This header will be used to join the control board
to the main board in a later step.
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9
Install 3.5mm Jacks
Insert the jacks into the PCB, soldering one pin of each as you go to hold it in
place. Check to make sure that they are at against the board and lined up
with the silkscreen pattern; reheat and reposition if not. Once the jacks are all
in place, test-t the front panel over the jacks to make sure they all line up with
the panel holes. If everything looks good, go ahead and solder the remaining
pins.
5
Install Film Capacitor
Install the lm capacitor C5, solder the leads, then trim them. Polarity doesn’t
matter for this capacitor.
7
Install Power Connector
Insert P2 into the board, aligning the notch in the connector with the notch
indicated on the silkscreen pattern. Make sure the connector is at against the
board, then solder it into place. The pins are short enough that they don’t
need to be trimmed.
6
Install Trim Pots
Insert R13 and R14 into the PCB and solder into place. Trim the leads.
If you are using the board by itself or creating your own
synth, you can stop here. If you are building a Eurorack module,
keep going!
Flip the board over! From here on out, all the parts go on the other side
Perform the remaining steps on the control board
10
Install Pots
Insert the pots into the control board. Place the front panel over the pots and
jacks, thread the appropriate nuts onto the pot and jack bushings, and
nger-tighten them. This ensures that the pots are lined up properly and
mounted at the right height.
Solder the pots into place. Carefully snug all the nuts down using a socket.
11
Join the Two Boards Together
Insert the open end of the control board header into the holes on the main
board as shown. Solder one of the pins in the middle, then check to make sure
the two PCBs are at right angles to each other. If an adjustment needs to be
made, heat up the pin you soldered and move the PCBs. When everything
looks good, solder the remaining header pins.
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CEM3340 VCO Build Instructions
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12
Install Knobs on Pot Shafts
Turn the pot shafts all the way counter-clockwise. Push the knobs onto the
pot shafts with the pointers at about the 7 o’clock position.
13
Install IC
Before inserting U1 into its socket, you may need to bend the pins inward a bit
so that they’ll line up with the socket holes. Lay the IC on its side on a at
surface, then gently press down on the top of the chip so that the pins bend
evenly. Repeat for the other side of the chip.
Insert the chip into its socket, making sure that the pin 1 dot/notch on the chip
is on the same end as the pin 1 notch in the socket.
THE END