Lvps Board Assembly; Hvps Board Assembly; Controller Board; Xerographic And Print Cartridge Components - Lexmark MS81x Service Manual

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LVPS board assembly

The LVPS board assembly generates 6.5V and 25V DC voltages. The LVPS can be switched to work with 100V, 110, and
220V machines.

HVPS board assembly

The HVPS board assembly generates and provides DC voltages to the developer roll, the transfer roller, and the charge
roller (located in the imaging unit).

Controller board

The controller board controls printing operation based on the communication with the RIP controller and optional
peripherals. It also controls toner dispense, fuser control, sensor switch feedback, drive motors, clutches, and solenoids.

Xerographic and print cartridge components

Charge
The charge roller places a uniform negative electrostatic charge on the surface of the drum. The drum surface is made
of a photoconductive material that holds an electrical charge as long as the drum remains in darkness. Light striking
the drum discharges the surface charge.
Appendix C: Theory of operation
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