Toshiba e-STUDIO4500c Service Manual page 819

August 2006
Tray Capacities
The machine has four paper trays:
Tandem Tray (Tray 1). 1550 + 1550 sheets
Universal Tray (Tray 2) 550 sheets
Universal Tray (Tray 3) 550 sheets
Bypass tray. 100 sheets.
Built-in Feed Stations
Paper feed and separation. Standard FRR system with a torque limiter for
paper separation and feed. Each tray has an independent stepper motor to drive
its paper feed mechanisms.
Forward and Separation Roller (FRR)
Tray lift motors. Provided for each tray, easily disengage when a tray is
removed and engage once again when the tray is re-installed. In trays 2 and 3,
the lift of the motors on the bottom plates is also used for paper near-end
detection.
Tandem tray paper end. A sensor near the top of the right rail detects paper
near end and another sensor under the bottom tray detects paper end after the
last sheet is fed. Three paper height sensors, on the left rail, are actuated as the
actuator rises with the bottom plate. The combinations of actuating and de-
actuating these sensors as the plate rises are used to detect the paper supply
display on the operation panel.
Paper size detection. For the tandem tray (Tray 1), an SP setting is required
(SP 5959 001). For the universal trays (Tray 2, 3), there is size detection switch
on each tray.
Vertical Transport. A grip roller at each feed station feeds the paper into the
vertical paper path.
Heaters. There are two anti-condensation heaters for the built-in paper feed
stations.
Bypass Feed
Capacity: 100 sheets.
Paper feed and separation: Standard FRR system with a torque limiter for
paper separation and feed. Bypass tray motor and clutch.
Paper end detection: Photointerrupter and feeler.
Size detection: Side fence is used for width detection, registration sensor pulse
count is used for length detection.
Thick paper feed: The bypass feed clutch switches on twice.
Paper Registration
Paper is guided to the registration roller from five sources: the 3 built-in paper
trays, 1 bypass tray, and 1 duplex tray.
There is a mylar strip over the entire length of the registration roller.
Jam Removal
Pulling out a paper tray releases the pressure on the rollers, making it easy to
remove paper jams.
Handling Paper> Paper Feed Methods>
6-103
PAPER FEED