Pass through sensor (option tray)
Detects when the media from the option tray passes. This will trigger the pick roller to pick the next media.
Capactive Toner Level Sensor (CTLS)
Detects the amount of toner in the imaging unit. If the toner level is low, the cartridge auger motor is triggered
to add toner from the toner cartridge to the imaging unit.
Front door sensor
Is a safety switch that cuts o a 5 V DC supply from the controller board to the LSU to prevent the laser from
activating when the front door is opened.
Other key components
Cooling fan
Discharges air from the printer to prevent excessive temperature increase.
Power supply
The power supply has two main sections: the HVPS and LVPS. The HVPS card assembly generates AC power
and feeds it to the developer roll, the transfer roll assembly and the charge roll assembly. The LVPS card
assembly generates low voltages: 5 V DC for logic circuits, 5 V DC for laser diodes and 24 V DC for cooling
fans.
Controller board
Controls the printing operation based on the communication with the RIP controller and optional peripherals.
It also controls the fuser, toner dispensing, sensor switch feedback, drive motors, clutches and solenoids
4514-330
Theory of operation
320
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