ADDAC System ADDAC104 User manual

March.2020
ADDAC104 Assembly Guide
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STEP 1:
Start by locating the 2 capacitors and solder them like shown below, notice the orientation on the pcb
print.
Tip: soldering these caps is easy, just place a dab of solder on the pad on your right (left pad if you’re
left handed) and then, with the help of a tweezer, put the capacitor in place and reflow the previously
tinned pad to reflow the solder while pushing the capacitor down. Then solder the other pad.
STEP 2:
Next proceed to locate the LM78L05 regulator ans solder it like shown below, notice the orientation on
the pcb print.
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ADDAC104 Assembly Guide
STEP 3:
Next locate the 4 trimmers and solder like shown below, notice the orientation on the pcb print.
STEP 4:
Next locate the 2x5 pinheader and solder it like shown below.

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STEP 5:
Next locate all 9 plastic shaft trim pots and flatten out their legs with the help of some pliers, like
shown below.
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ADDAC104 Assembly Guide

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STEP 6:
Next place all parts in the pcb.
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STEP 7:
After all parts are in place, fit the frontpanel in and tighten all the nuts.
Proceed by soldering all pads in the back.
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STEP 8:
Next proceed to prepare the vactrols, bend all legs down (logo facing up) and cut them aprox. 12mm like
shown below.
ADDAC104 Assembly Guide
STEP 9:
Start by getting the vactrol in place than solder each leg flush to the pcb, do not insert the vactrol legs
all the way down as this may cause shorts on front side of the pcb. Solder them as flush as possible and
in the orientation shown below.
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Place and tighten all remaining nuts and you’re done!
Proceed to the calibration method.
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This process will calibrate the each channel frequency
range.
PROCEDURE
Start by voice 1:
1. Patch the Output 1 to your prefered output
2. Patch a Trigger/Gate to Input 1
3. Set “FREQUENCY 1” knob to Maximum value
4. Set “L/M/H” switch to Middle position
5. Set same channel “ATTENUVERTER” knob to 12 o’clock
6. At this point you should be hearing the voice’s sound
7. Adjust the trimmer counter-clockwise until the
frequency stops going up.
Repeat the procedure for the remaining voices.
ADDAC104 Calibration Guide
Calibration
VOICE 2VOICE 1
VOICE 3 VOICE 4
TRIMMER LOCATIONS

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ADDAC104 ASSEMBLY GUIDE
March.2020Revision.01