Tubbutec OrganDonor User manual

Tubbutec OrganDonor
Installation manual for Yamaha SS-30
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
•4x organ Donor Switch Board 1 is half populated), 3x16pin
Connector, 1x20 pin connector
•Analog switch connection: 3x16 – 9cm, 1x20p - 9cm
•Interconnect cables: 1x 42cm, 3x 13cm
•Midi connector assembly
•Power connector, extended
•Learn button
•2x screw 2,9x6,5, 4x screw M3x16mm
•Midi socket drill guide
•2x M3 bolt, 2xM3 nut for midi socket

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. We already connect these jumpers for you.
In the case of the Yamaha SS-30 there is one common signal.

Switch board installation
Mount the switch boards on the underside of the keyboard as shown in in
the picture using the M3x16mm screws. The 3 left boards have 16 pin
connectors, the last one on the right has a 20 pin connector!
To mount the switchboard you need to unscrew the white plastic bracket.

After you removed the white plastic bracket it should look like this:
Then take 1 of the M3x16mm screws and screw the switch board and the
white plastic brackets back in place.
Do that for all 4 switch boards.

Please note that the board are installed upside down in reverse order
counting from right to left) to make sure we don’t need a too long
interconnection cable between the main board and the first switch board.
That also means the key assignment is reversed, switch 1 triggers the
highest note and switch 49 triggers the lowest note. Keep that in mind
should you wish to play with the configuration!
Mount the main board with the 2 2,9x6,5 screws as shown in the picture.
It is advisable to mark the two holes with a marker and pre-drill a pilot
hole. It is much easier to screw in the screws this way.

Use the interconnect wires to connect the main board and the 4 switch
boards.
This is how we routed the interconnection cable from the main board to
switch board 1, see also the picture of the main board placement. Make
sure the cable doesn’t get squished when closing the synthesizer.

Installing the key contacts
Cut the ribbon cables to length and strip the wires.
Switch board 1:
The first wire of the 20 wire ribbon cable gets soldered to the common
contact.
Wire 2 gets cut.
Wires 3-18 get soldered to the first 16 key contacts. Be careful not to
desolder the internal wires.
Wires 19 and 20 get cut.
The red-striped wire is the common connection which gets soldered to
the common bus bar in the upper right corner.
Switch board 2:
Wires 1–16 get soldered to key contacts 17–32.
Switch board 3:
Wires 1-16 get soldered to key contacts 33-48.
Switch board 4 only one IC installed):
Wire 1 gets soldered to key contact 49.

Power connection
You need to extend the included power wire assembly.
Solder the yellow cable of the assembly to the yellow cables on board
LC82810, the black one to the black one, and the red one to the brown
one. Make sure there are no shorts!

Installing the midi socket
The midi socket can be installed on the back of the machine like we did.
Use the provided drill guide to center punch the locations of the 3 holes.
The two small holes need to be about 3.2mmm to 3.5mm in diameter,
the large hole 15mm. Here we typically use a stepping drill.
After drilling the holes you can unscrew the 6 screws of the jack
mounting plate. That way it’s much easier to install the Midi socket.
After installation it should look something like this.

Installing the optional learn button
The optional learn button can be used to set midi channel. It needs to be
connected to the IO “2” and “G” pin on the main board. The back of the
main board has labels on it). 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.
Configuration
We already flashed the corresponding configuration file to OrganDonor.
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.
The configurator allows you to upload your settings directly from your
browser to Organ Donor, safe and load settings and export settings as
SysEx files for uploading to Organ Donor via another SysEx tool.