October 2012
8-11
ColorQube 8570/8870 Service Manual
Printer Electronics
Theory of Operation
Xerox Internal Use Only - Revised, 3rd Revision
Main Controller Board
The Main Controller Board controls the operation of all the mechanical and electrical systems
in the print engine. Through the Power Control and I/O Boards, signals are passed to the differ-
ent gear trains, heater controls, and drive motors and signals are received from the Sensors for
proper operation of the print engine. The Main Controller Board provides support for Ethernet
and USB 2.0 external I/O interfaces.
Figure 5 Main Controller Board
Power Control Board
The Power Control Board acts as a interconnect board between the Main Controller Board,
Power Supply, HCF, and the I/O Board. The Power Control Board distributes drive voltages to
operate the printer’s various Motors, Solenoids, and Clutches. The Power Control Board pro-
vides the interface that returns information from the printer’s Sensors to the Main Controller
Board. The Sensors are used to track mechanical and thermal functions, such as the position
and temperature of the Printhead. The Power Control Board also generates regulated 1.8V
and 12V.
Figure 6 Power Control Board
Summary of Contents for COLORQUBE 8570
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