Crumar DS2 Midi Upgrade Vitalka Custom
Vitalii Kulakov
Installation:
Select the right place to mount the LED, DIN5 MIDI connector and button on your synth (on the back panel near jacks for example). PCB can be mounted under the keyboard on the left side.
Drill holes and try to mount it before soldering wires.
Important:
For organ keycontacts need to be isolate or remove ground bus. It can do extra cacophony-humming noise on output, but if not do it - MIDI for organ section won't be working.
Drill dimensions:
DIN5 18mm
LED = 4.8-5mm.(better if less 5mm to strong holding in the hole)
Push button = 12.5-13mm
Board dimensions and distance between screws:
Board dimensions 106x90mm
Holes distance 94x80mm
Holes diameter 3.5mm
Do not allow the board to bend, it can break the board.
All ribbon cables are 50-120cm long, enough for placing all connections and you can cut extra length.
First octave 50cm x2
Second octave 70cm x2
Third octave 90cm x2
Fourth octave 105cm x2
Fifth octave 120cm x2
Power and others connections cable 120cm x1
Panic button is not included in the kit. In case of panic - enough turn off and turn on the synth.
The next picture shows the pinout for 8 wire ribbon cable and pin number of wires:
1 - DIN5 4pin
2 - DIN5 5pin
3 - LEARN
4 - GROUND
5 - LED ANODE
6 - RESET
7 - V+
8 - GROUND
V+(wire 7) to +12V at the power supply. GND (wire 8) to GND:
This picture shown first(1) pin/wire on all connectors:
Board pinout and MIDI note:
Solder wires for every key contact in the keycontact group.
To teach the MIDI channel, push the black button (LEARN) LED will blink two times and stay ON to wait for MIDI messages. When messages are received 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 not changed before will be rewritten.