Not too long ago I installed a Color DMD in my LOTR. One thing that bothered me about this installation is the way Stern routed the +5V for the display driver board, through the Plasma Display Power Supply. Having it routed this way didn't allow me any way to disconnect the transformer cable to the Plasma Power Supply, granted I pulled the fuse on the board, but I was still not happy having these voltages going to an unused board.
Rainy Sunday here...Perfect day to clean this up.
Tools and materials: (NOTE: Links are for reference only)
24" of black stranded 18 AWG wire amazon.com link »
24" of red stranded 18 AWG wire amazon.com link »
3 pin IDC connector (.156") https://www.marcospecialties.com/pinball-parts/5792-10817-03
3 Pin Molex connector (.093") https://www.marcospecialties.com/pinball-parts/5791-09111-00
3 Crimp Terminals (0.93") https://www.marcospecialties.com/pinball-parts/CT093M
.156 IDC Termination Tool https://www.pinballlife.com/index.php?p=product&id=4045
Wire Connector crimp tool amazon.com link »
First thing to do is make your new wiring harness using the materials listed above; this harness will be used to reroute the 5 volts originally going to the Display Power Supply and send it directly to the Display Driver board. I cannot understate how important it is to get this cable right; any mis-wiring of this cable can cause severe damage to your game!
Next, remove the Plasma Display cable conected to CN2 of the Plasma Power Supply, the other end of this cable has 2 connectors, one of which will be connected to the Display driver board mounted to the backside of the Color DMD. This cable can be removed from the system...I put mine in a bag and tossed it in the coin box.
Now we need to disconnect CN1 (Input Power cable) from the Display Power Supply, this cable leaves the head as it has wires that connect to the main transformer in the cabinet, it also has a 3 pin Molex type connector that is part of the main power harness; the 3 pin Molex connector has +20V, +5V, and GND, this is the connector we will use to power the Color DMD. I left the Display Power Supply input cable in the back box, but this can be dropped in the cabinet if desired.
Now that all the unused wiring has been attended to, all that's left to do is connect the new harness to the game.
And turn on the game....