Test_LEDs
The print solenoids (one for each platten) are connected to a chocolate block (screw terminal block) that is normally screwed to the solenoid mounting plate. Here a pair of LEDs and series resistors have been fitted in place of the solenoids. The middle 2 terminal (yellow/red wires) are the +36V power rail, the outside 2 wires are grounded via power transistors on the ancillary control and data control PCBs to oeprate the solenoids.
Test_LEDs
The print solenoids (one for each platten) are connected to a chocolate block (screw terminal block) that is normally screwed to the solenoid mounting plate. Here a pair of LEDs and series resistors have been fitted in place of the solenoids. The middle 2 terminal (yellow/red wires) are the +36V power rail, the outside 2 wires are grounded via power transistors on the ancillary control and data control PCBs to oeprate the solenoids.