Xerox 3400N - Phaser B/W Laser Printer, Руководство по обслуживанию

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Repair Analysis Procedures 33
2
The paper supply is monitored by the paper empty sensor. When the tray runs out of paper,
the sensor will send a signal to the Print Engine Controller Board and the paper LED will
illuminate.
+5,
The drive for all rollers is provided by the main drive motor and a series of drive gears.
When the main motor turns, all the paper path components turn except the Pick-Up Roller.
The Pick-Up Roller assembly includes a mechanical clutch, released by the paper feed
solenoid.
+H
When the Print Engine Controller Board is ready to feed paper, it energizes the paper feed
solenoid. The solenoid armature releases the media unit clutch and the pick up roller
makes one revolution. This drives the paper to the Feed Roller and Pinch Roller. Note the
shape of the Pick-Up Roller. The flat side always faces the paper supply when not feeding
paper. This shape allows paper to be moved in and out of the assembly.
The feed roller and pinch roller now drive the paper toward the transfer area. Before
arriving at the transfer area, the paper actuates the registration sensor.
+45 "
P3400-011
Cartridge
LSU
Fuser
Idle Roller
Pick-Up
Roller
Pick-Up Roller
Transfer Roller
Exit
Roller
Pressure
Roller
Heat
Roller
Printed Paper
(250 sheets stacking:
face down)
Feed
Roller
Tray 1
Tray 2
Drum
Exit
Roller
Registration
Sensor
Out of Paper Actuator
Tray 1
Out of Paper Actuator
Tray 2
Fuser Exit
Sensor