Korg VC-10 MIDI kit retrofit Vitalka Custom
This retrofit only for key triggering through MIDI. Octave transposing through MIDI is not allowed on this version of board.
Welcome to the metric system zone. Here we work with precision things and all dimensions are metric. 1" = 25.4mm.
Installation:
To your good usability select the friendly place to mount the LED, DIN5 MIDI connector, button and PCB. Mount connector, LED and button before soldering wires. Key contacts ribbon cables have two 12 and one 14 wires.
Drill dimensions:
DIN5 = 18mm.
LED indicator = 6mm.
Push button = 12.5-13mm.
Be careful with drilling hole for button, it have small range to get hole too big.
Board dimensions and distance between screws:
Board dimensions 102x50mm.
Holes distance 94x39mm. - Use it for drill holes for board mounting.
Holes diameter 3.5mm.
Do not allow the board to bend, it can break the board.
All ribbon cables are 1M long, enough for placing all connections and you can cut extra length.
Panic button is not included in the kit. In case of panic - enough turn off and turn on the synth.
This picture shown first (1) pin/wire on all connectors:
All next wire should be connected to each key contact or to the main board:
The next picture shows the pinout for 8 wire ribbon cable and pin number of wires:
Same you can see on bottom side of PCB for more convenience.
You will need to connect wire 4 (GND) with LED and button. All other wires in this kit required only one point of soldering.
(7) V+ should be soldered to any +15V point, (8) GND to any ground. Better if at a power supply near IC1. After soldering 8pin connector wires, time to solder wires for key contacts.
Wires can be soldered to key contacts or directly to the main board. Descriptions of the first two connectors are skipped in this synth and not shown below, but not disabled.
Below you can see Pin/wire number, note name, VC-10 main board contact name and MIDI note number. For Korg VC-10 selected range F5-C8. You can shift it on your MIDI out device or DAW, or connect to the first three connectors. If you do not connect as shown below, the Last key will not be triggered from MIDI.
One small important thing - use hot glue to fix inserted connectors to protect from disconnecting them during vibration when you ride on tour. Also fix wires strong. Do not leave them holding only on soldering joints.
Process for set MIDI channel:
Stop all MIDI traffic.
To teach with which MIDI channel synth will work - push the black button (LEARN) LED will blink two times and stay ON to wait for MIDI messages on OMNY channel.
Send any note on the MIDI channel which you want for this synth.
When the synth receives MIDI messages, LED will blink five times and turn OFF. And then will ON with every NOTE ON messages on the selected channel.
Now the channel saved to memory and will never change before you push LEARN button again and starts settings process again