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Summary of Contents for Majella MCVC
- Page 1 MCVC DIY MANUAL Version 1.0...
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Page 2: Specifications
The -12V (red lead) should be directed as shown in the picture below. CONTENTS The MCVC comes in a box and is fully assembled and tested. Included are a 16- pin IDC power cable and M3 mounting screws + rack crash protection washers. - Page 3 •! Nut driver (plier, at own risk) Bill of materials (BOM) To start, it is good practice to check if the kit is complete. We double check the kitbags, but its never a bad idea to triple check. ©2019 Majella Audio...
- Page 4 DIY Manual IC socket (1x 8 pin) Its best to start with the lowest parts on the top side of the MCVC printed circuit board (PCB). The yellow marking in figure 1 shows its placement. Please note the orientation of the IC (socket).
- Page 5 MCVC DIY Manual Capacitors (12x) There are 12 capacitors (100nF) that need to be soldered. The placement is shown in figure 2 (yellow markings). Figure 2: 100nF capacitors placement (YELLOW) ©2019 Majella Audio...
- Page 6 Now we solder the trimmer. See figure 3 for its placement (yellow marking). Mind its orientation! The small trim screw should be pointing towards the left as shown in figure 3 (yellow marking). Figure 3: Trimmer (YELLOW) ©2019 Majella Audio...
- Page 7 We advice to (without soldering) place the jacks into the PCB (yellow marked, figure 4). Then place the panel on the jacks. Carefully turn around the MCVC and lay it down on supports, as shown below in figure 5: Figure 5: support Solder one pin from each connector.
- Page 8 Next up is the switch. It should be placed as marked yellow in figure 6. Make sure it’s tight to the PCB. When soldered, toggle the switch downwards, this will make it easier to fit the panel on top later on. Figure 6: Toggle switch (YELLOW) ©2019 Majella Audio...
- Page 9 PCB (the back of the module). This is show in figure 7 (yellow marking). MIND its orientation! The Notch is shown in figure 7. Figure 7: Headers (YELLOW) ©2019 Majella Audio...
- Page 10 (+ positive, long leg) is marked with a red dot in figure 9. Figure 9: LED orientation (YELLOW) It helps to use the panel while placing the LED’s so that they fit the panel nicely. Figure 8: LED’s (YELLOW) ©2019 Majella Audio...
- Page 11 MCVC DIY Manual MIDI connector (1x) Now we are going to solder the MIDI connector as shown in figure 10. Make sure its straight. Figure 10: MIDI (DIN) connector (YELLOW) ©2019 Majella Audio...
- Page 12 Play note A in different octaves until you have a note A, which is close to 4V. Trim it to exactly 4.000V (or as close as you can get). Figure 12: A4 should be 4V. (Octave can differ) ©2019 Majella Audio...
- Page 13 Montage Now that everything is soldered and the device is tuned, we can montage the panel. It is however possible to tune the MCVC while the panel has been placed. Place the two spacers/standoffs (yellow marking on figure 13) and screw the black 3mm screws from the back (PCB).
- Page 14 Capacitors 6n137 Optocoupler 8 pin IC socket LED’s MIDI connector Toggle Switch 6 pin IDC header 16 pin IDC header Minijacks Minijack connectors Trimmer Standoff (hex) montage 3mm Screws (Black, hex) montage 3mm Screws (silver, hex) montage ©2019 Majella Audio...
- Page 15 Special thanks to: Rob Cottam MCVC User Manual version 1.0 23-10-2019 ©2019 https://majella-audio.com support@majella-audio.com Designed and made in the Netherlands...