Korg ES-50 Lambda User manual

Tubbutec OrganDonor
Installation manual for Korg Lambda ES-50
Tools you will need:
•Soldering iron
•Wire stripper
•Metal drill .5mm (or similar)
•Metal drill for a 15mm hole (stepping drill for example)
•Center punch
•Screw driver
•Stranded wire to extend the power and MIDI connectors
Included in the kit:
•OrganDonor Main Board
•x organ Donor Switch Board, 2x 16pin connector, 1x 20pin
connector
•Analog switch connection: 1x 20pin 5cm, 2x 16pin 0cm
•Interconnect cables: x 12cm
•Midi connector assembly
•Power connector
•Learn button
•Midi socket drill guide
•2x M bolt, 2xM nut for midi socket
•1 x 2,9x6,5mm screws

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 Korg Lambda there is 1 common signal.
Installation
Before you place the boards please stick insulation tape on the bottom
side of the boards to prevent short circuits with the tinfoil.
Plug in the interconnection cables and the switch board cables.

Now solder the switch board wires to the key contacts:
Take care that you don’t accidentally desolder the internal wires.
Switch board 1 (20pin connector):
Wire 1 gets soldered to the common connection (bus bar).
Wire 2 gets cut.
Wires – 18 get soldered to key contacts 1 – 16.
Wires 19 and 20 get cut.
Switch board 2 (16pin connector):
Wires 1 – 16 get soldered to key contacts 17 – 2.
Switch board (16pin connector):
Wires – 14 get soldered to key contacts – 48.

Power connection
You need to extend the wires of the power connector by about 20cm.
To do so take some stranded wire with different colors, strip and solder
to the power connector wires. Use shrinking tube to cover the joints.
Then solder the wires to the power supply board.
The yellow wire gets soldered to the blue wires (-15V), the black wire to
the black wires (GND) and the red wire to the red wires (+15V).

Installing the midi socket
Decide where you want to install the MIDI socket.
Use the provided drill guide to center punch the locations of the holes.
The two small holes need to be about .5mm in diameter, the large hole
15mm. Here we typically use a stepping drill.
You might need to extend the wires of the MIDI jack assembly,
depending on where you place the jack.
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 on. These
settings are saved.
Configuration
We already flashed the corresponding configuration file to Organ Donor.
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 OrganDonor, safe and load settings and export settings as
SysEx files for uploading to Organ Donor via another SysEx tool.