Xerox 4400DT - Phaser B/W Laser Printer, Руководство по обслуживанию, Страница: 458 / 503

Phaser 4400 Laser Printer Service Manual 8-45
Function of Major Components
The figure on page 8-46 shows the major components of the Option Feeder
Assembly.
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Turn Roller Clutch Assembly — Consists of a gear and an electric clutch
located on the end of the Turn Roller Assembly shaft. This clutch controls
the transmission of the drive power from Gear 4 of the Standard Feeder
Assembly to the Turn Roller Assembly by turning on and off the Turn Roller
clutch. When this clutch is activated, the drive power is transmitted to the
Turn Roller Assembly through the OPT Gear to the gear of the Feed Clutch
Assembly. When Optional feeders are installed, all Turn Roller clutches turn
on at the same time.
■
Feed Clutch Assembly — Consists of a gear and an electric clutch located on
the end of the Feeder Assembly shaft. This clutch controls the transmission
of the drive power from Gear 3 through the Turn Clutch Assembly to the
Roller Assembly of the Feeder Assembly by turning on and off the Feed
clutch. When this clutch is activated, the drive power is transmitted to the
Feeder Assembly.
■
Feeder Assembly — Consists of the Nudger Support Assembly, Shaft Feed
and Roller Assembly. The task of this Assembly is to pick the paper from the
Paper Tray and feed it to the Turn Roller. To ensure this task, the Nudger
Support Assembly acts as the actuator for the Stack Height Sensor Control
by swivelling itself up and down, synchronizing the height of the stacked
paper.
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Turn Roller Assembly — This Assembly feeds the paper through the
standard paper path. The mechanical activity is the same as the Turn Roller
Clutch Assembly.
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Feeder PWB — Connective interface between the Sensors, Clutches and
Motor, and the Size Option PWB. This PWB also monitors the No Paper
Sensor which detects the out of paper condition of the Paper Tray.
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Size Option PWB — Controls the Option Feeder Assembly, the interface
function between the Size Option PWBs, the Feeder PWB, and the Engine
Logic Board.
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No Paper Sensor — Detects when the Paper Tray Assembly is out of paper.
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No Paper Actuator — Actuates the No Paper Sensor. When out of paper, this
actuator will swivel down and shield the No Paper Sensor.
■
Low Paper Sensor — Detects when the paper level in the Paper Tray
Assembly falls to approximately 50 +/- 30 sheets of paper.
■
Stack Height Sensor — Detects the paper level (the position of the top sheet
of paper). This sensor is actuated by the Nudger Support Assembly.
■
Size Switch — Mounted on the Feeder PWB and detects the Paper Tray
Assembly’s paper size setting.