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Tubbutec OrganDonor Installation Manual

For roland rs-505
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Tools you will need:
• Soldering iron
• Wire stripper
• Metal drill 3.5mm (or similar)
• Metal drill for a 15mm hole (stepping drill for example)
• Center punch
• Screw driver
Included in the kit:
• OrganDonor Main Board
• 5x organ Donor Switch Board, 3x 16pin Connector, 2x 20pin
connector
• Analog switch connection:
Switch 1 16pin, 40cm
Switch 2 16pin, 45cm
Switch 3 20pin, 45cm
Switch 4 16pin, 45cm, wire 1 extended to 75cm
Switch 5 20pin, 40cm, wire 1 extended to 64cm
optional 16pin header on switch board 5, 120cm
• Interconnect cables: 1x 8cm, 2x 14cm, 1x 22cm, 1x 45cm
• Midi connector assembly
• Power connector
• Learn button
• 2 resistors (1K, 47K), 1 capacitor (100nF)
• 19x screw 2,9x6.5mm
• Midi socket drill guide
• 2x M3 bolt, 2xM3 nut for midi socket
Tubbutec OrganDonor
Installation manual for Roland RS-505

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Summary of Contents for Tubbutec OrganDonor

  • Page 1 • Metal drill for a 15mm hole (stepping drill for example) • Center punch • Screw driver Included in the kit: • OrganDonor Main Board • 5x organ Donor Switch Board, 3x 16pin Connector, 2x 20pin connector • Analog switch connection:...

  • Page 2: Principle Of Operation

    OrganDonor uses analog switches to simulate keyboard presses directly. Normally this would require to solder two wires for each key. Luckily this can often be avoided by grouping common signals. OrganDonor features solder jumpers to connect common signals on the back of each analog switch board.

  • Page 3: Board Installation

    Board installation Mount the main board and the 5 switch boards directly to the bottom of the synthesizer case under the keyboard using the supplied 2,9x6,5mm screws. Please note: the order of the boards is as followa: main – switch 1 – switch 4 – switch 2 – switch 5 – switch 3 The boards are marked on the backside, so make sure they are in the correct order.
  • Page 4 Install the interconnection cables and the switch cable assemblies. Take care of the order of connections. Cut the cables to length and strip the wires. Solder the wires to their respective points on the pcb, take care not to desolder the internal wires. Switch board 1: Wire 1 - 16 get soldered to the lower row of key contacts to contacts 1 –...
  • Page 5 Optional 16pin header of switch board 5 There are 7 switch contacts left, so we choose to use 6 of those to switch the registers of the synth section on and off via MIDI CC. To do that you simply have to solder 2 wires each to the switches. Wires 1 and 2 get cut.

  • Page 6: Power Connection

    Power connection Install the power connection wire assembly as follows: The red wire gets soldered to +15V on the bottom side of the power supply pcb. This is the connector on the left, with the red wires being the +15V connections. The black wire gets soldered to the ground connection (marked E) on the bottom side of the power supply pcb.
  • Page 7 Wires are not included in the kit. Press the learn button and while it is pressed send a midi note on any midi channel. OrganDonor will use this midi channel from now. These settings are saved.
  • Page 8 Installing the optional Filter Control It is possible to control the filter cutoff via MIDI. To do so you need to install the included resistors and capacitor as follows: Solder one leg of the 1K resistor to the PWM1 connection (The back of the main board has labels on it).
  • Page 9 There is, however, a software configuration tool available, in case you want to play around with settings and key assignments. You`ll find the configurator here: https://tubbutec.de/files/organDonor/ tubbutecOrganDonorConfigurator.html This is a browser application, it works with Chrome and Safari right away, Firefox needs to be configured for web MIDI.