Tom 1501 MIDI kit retrofit Installation manual

This retrofit controlling only the keyboard and you still can play on it at same time.

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 next to the power supply or chorus boards. 
Drill holes and try to mount it before soldering wires.
 

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  102x50mm
Holes distance  94x80mm
Holes diameter  3.5mm

Do not allow the board to bend, it can break the board. 

All ribbon cables are 120cm long, enough for placing all connections and you can cut extra length.
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

This picture shown first (1) pin/wire on all connectors:

All next wire should be connected to each key contact or to the main board:

Board pinout and MIDI note. View on keyboard, starts from left to right.

Solder wires to key contacts and common bus. Starting from the first octave and wire №12

.

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.