Xerox DocuColor 12/DCCS50, Service Manual

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10-155 DocuColor 12/DCCS50
Finisher Power, Finisher Interlocks
Principles of Operation
Reissue
Finisher Power
The Finisher requires +5VDC and +24VDC for normal operation. The Finisher receives these
voltages from the Distribution PWB in the IOT (
Figure 1 ).
The Finisher PWB uses these voltages to run internal logic, sensors, solenoids, and the Fin-
isher Motors. The Distribution PWB +24VDC output is controlled by the Decurler Door Inter-
lock, the Stapler Door Interlock, the Compiler Cover Interlock, and the Mailbox Door Interlock
switches. The +24VDC from the Distribution PWB is cut whenever any of these door interlocks
are opened.
Figure 1 DC Power Circuits
Finisher Interlocks
The interlocks on the doors of the Finisher have two circuits, a +24VDC circuit and a +5VDC
circuit. Generally speaking, the +24VDC side of the interlock is used to interrupt Finisher power
when a door is opened, and the +5VDC side of the interlock controls interlock fault declaration.
The door interlocks work by interrupting power to the finisher. When a door is opened, the
+24VDC side of the switch is opened and the finisher functions that use +24VDC are shut
down. The +5VDC side of the interlock is also opened, resulting in a fault declaration (
Figure
1 ).
The Docking Interlocks are located on the left side of the Finisher assembly. These are mag-
netic interlocks that are held open when the Finisher is docked. When the Finisher is
undocked, the switches will close, completing a path to ground. The resulting drop in voltage is
sensed on the Finisher PWB, and will result in an indication that the Finisher is undocked.