Toshiba e-STUDIO200L Service Manual page 209

1) Pickup roller
This roller moves up and down to draw out a sheet of paper from the bypass tray or the drawer, and
transport it to the feed roller.
2) Feed roller
This roller transports the paper from the pickup roller to the registration roller.
3) Separation roller
This roller is mounted against the feed roller. When two sheets of paper or more are transported
from the pickup roller, the load of the torque limiter (spring) of the separation roller is greater than the
frictional force between the sheets. As the result, the separation roller is stopped and the lower
sheet of paper is not transported any further. When only one sheet of paper is transported from the
pickup roller, the separation roller is forced to rotate following the feed roller.
4) 1st transport roller
This roller relays the paper transported from the drawer, bypass unit, ADU to secure the transport
performance in the registration roller. After the paper is aligned in the registration roller, it is trans-
ported in the 1st transport roller at the same speed (low speed) as that of registration roller.
5) 2nd transport roller
This roller transports the paper from the lower drawer or PFP/LCF to the 1st transport roller.
6) Registration roller
Paper transported from the 1st transport roller is pushed against the registration rollers, which aligns
the leading edge of paper. The registration roller then rotates to transport the paper to the transfer
section.
7) Bypass paper sensor
This sensor detects whether paper is set in the bypass tray or not. If it is, bypass feeding is per-
formed in preference to drawer feeding. And also detects whether paper has been transported from
the bypass tray or not. In other words, whether the leading/trailing edge of paper has passed the
feed sensor or not. This sensor is utilized to detect the jams such as paper misfeeding in the bypass
unit.
8) Drawer empty sensor
This is a transmissive-type sensor which detects the presence/absence of paper in the drawer using
an actuator. When there is no paper in the drawer, the actuator blocks the light path of the sensor.
Then the sensor determines that there is no paper.
9) Drawer paper stock sensor
This is a transmissive-type sensor which detects the amount of paper remaining in the drawer using
an actuator. When the remaining paper has become around 100 sheets, the actuator blocks the light
path of the sensor to notify that the paper quantity is getting less.
10)Feed sensor
This sensor detects whether the leading/trailing edge of paper has passed the feed roller or not. It
also detects jams such as paper misfeeding.
11)Registration sensor
This sensor detects whether the leading edge of the paper has reached the registration roller or not,
and the trailing edge of paper has passed the registration roller or not.
12)Upper transport clutch
Drives the 1st transport roller at high speed by transmitting the drive from the main motor.
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PAPER FEEDING SYSTEM
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