Toshiba E-STUDIO2008A, Руководство по обслуживанию, Страница: 87 / 1016

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OUTLINE OF THE MACHINE
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3.10.3 Functions
1. Pickup roller
This roller moves up and down to draw out a sheet of paper from 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. Transport roller
This roller transports the paper from the lower drawer or PFP/LCF to the 1st transport roller.
5. 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.
6. Bypass feed roller
This roller picks up and feeds paper from the bypass unit.
7. Bypass separation roller
This roller is mounted against the feed roller. When two sheets of paper or more are transported, the
load of the torque limiter (spring) of the bypass separation roller is greater than the frictional force
between the sheets. As a result, the bypass separation roller is stopped and the lower sheet of
paper is not transported any further. When only one sheet of paper is transported, the bypass
separation roller is forced to rotate the feed roller.
8. Bypass paper sensor(S8)
This sensor detects whether paper is set in the bypass tray or not. If it is, bypass feeding is
performed 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.
9. Upper/Lower drawer empty sensor (S12/S15)
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.
10.Upper/Lower drawer paper stock sensor (S10/S13)
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.
11. Registration sensor (S17)
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.
12.1st transport sensor (S16)
This sensor detects whether paper from each paper source is being transported or not.