Tubbutec PE-2000 Korg Polyphonic Ensemble Instructions
- September 13, 2024
- Tubbutec
Table of Contents
Tubbutec PE-2000 Korg Polyphonic Ensemble
Installation manual for Korg Polyphonic Ensemble PE-2000
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
- Screwdriver
Included in the kit:
- OrganDonor Main Board
- 3x organ Donor Switch Board, 2x16pin connector, 1×20 pin connector
- Analog switch connection: 1×20 – 40cm, 1×16 – 40cm, 1×16 – 55cm
- Interconnect cables: 1x 35cm, 2x10cm
- Midi connector assembly
- Power connector
- Learn button
- 13x screw 6.5mm
- 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 switchboard. We already connected these jumpers for you. The PE-2000 has 48 keys. The keyboard uses 1 common contact bus. On the keyboard itself, the common contacts are connected via jumper wires
Installation
First place the main board and the 3 switch boards inside the synthesizer case, see Figure 1. The main board is placed to the left of the jack panel, and the 3 switchboards to the bottom of the case. Use the 2,9×6,5 screws for this. Then connect the main board and the switch boards with the 10-pole ribbon interconnection wires.
Power connection
Connect the supplied wire assembly for the power connection to the main board. Connect V+ (red wire) to the point marked with a yellow circle in Figure 2. Connect GND and V- (black and yellow wires) to the point marked with a turquoise circle in Figure 2 (attention: both get connected to the black ground wires on the power supply PCB).
Installing the key connections
Cut the ribbon cables to length and strip the wires.
Switchboard 1:
The first wire of the 20-wire ribbon cable gets soldered to the first common contact of the keyboard, see red circle in Figure 3. Take care not to desolder the internal red bus connection wire. Please note that the common bus wire is looped through to the next common contact of the next key block. It is therefore only necessary to solder the common connection to one point on the keyboard. Wire 2 is not used and gets cut. Wires 3-18 get soldered to the first 16 key contacts (the yellow circle in Figure 3 shows the first key contact). Be careful not to desolder the internal wires. Wires 19 and 20 are not used and get cut.
Switchboard 2:
Wires 1–16 get soldered to key contacts 17–32.
Switchboard 3:
Wires 1-16 get soldered to key contacts 33- 48.
Installing the MIDI socket
You can either drill a hole in the back of the PE-2000 and install a Midi socket, or you can remove the Traveller Control jack, but leave all the connections intact. Put the jack in a plastic bag and secure it inside the synth. Now just install the MIDI jack where the Traveller Control jack was located. In this case, you don’t need to drill a hole and can easily restore the synth to its original state. The MIDI jack connects to the main board.
Installing the learn button
The optional learn button can be used to set the midi channel. It needs to be
connected to the IO “2” and “G” pins 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, that 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, save and load settings, and export settings as SysEx files for uploading to Organ Donor via another SysEx tool. All pictures are used with the friendly permission of Manfred Veber of www.vintagesynthsandco.com. Thanks a lot.
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