Xerox Phaser 6280, Service Manual

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2-38 Phaser 6280 Color Laser Printer Service Manual
Theory of Operation
Power Switch
The Power Switch turns the printer AC Power Supply On/Off.
Main Fan
The Main Fan removes heat from the printer to prevent overheating.
Electrically Erasable Programmable Read-Only Memory (EEPROM) Board
The EEPROM Board stores the printer unique information. Information on the
EEPROM Board is also stored on the Machine Control Unit (MCU) Board.
Humidity Sensor
The Humidity Sensor reads the humidity and temperature within the printer.
Interlock Switch
The Interlock Switch is a switch that cuts the +24 VDC power supply to the
HVPS or Motor upon the opening of the Front Cover.
Low-Voltage Power Supply (LVPS)
Two types of LVPS are available: 100/120V and 230V. The LVPS supplies AC
power from the power source to the Fuser Heater; the LVPS also generates
and supplies stable low-voltage DC power used for the logic circuit. The LVPS
contains a control circuit for the heater of the Fuser, in addition to the power
circuit.
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