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Theory of Operation
2-13
Fuser Exit Sensor
The Exit Sensor monitors the paper movement. If the paper takes too long getting to
the sensor, or it stays on the sensor too long, the Main Board will shut down the
machine, the Control Panel LED will blink red, and a JAM 2 error message will
display on the Control Panel. The signal from the Exit Sensor is also used to control
paper feed to the Duplex Unit for duplex print jobs.
Duplex Unit
The Duplex Unit is mounted in the bottom of the printer. As paper leaves the fuser
and is picked up by the Exit Rollers, the drive direction is reversed to send the paper
down to the Duplex Unit. As the paper passes through the Duplex Unit, it activates the
Duplex Sensor. This in turn activates the feed roller to position the paper for printing
on the second side.
Summary of Contents for 3450B - Phaser B/W Laser Printer
Page 1: ...Service Manual P h a s e r L a s e r P r i n t e r 3450...
Page 2: ......
Page 13: ...xii Phaser 3450 Laser Printer...
Page 19: ...xviii Phaser 3450 Laser Printer...
Page 28: ...General Information 1 9 Consumables 1 Print Cartridge 1 s3450 164...
Page 47: ...2 14 Phaser 3450 Laser Printer Service Manual...
Page 92: ...6 Chapter Adjustments and Calibrations In this chapter Margin Calibration Resetting NVRAM...
Page 97: ...7 4 Phaser 3450 Laser Printer Service Manual...
Page 143: ...8 46 Phaser 3450 Laser Printer Service Manual...
Page 175: ...10 6 Phaser 3450 Laser Printer Service Manual...
Page 179: ......
Page 180: ...071 0866 00...