Functions - Toshiba e-STUDIO163 Service Manual

10.3 Functions

1) Pickup roller
This roller, which has a semicircle shaped roller section, draws out a sheet of paper from the drawer
and transport it to the registration roller. One rotation of the pickup roller transports one sheet of
paper to the registration roller.
2) Pickup solenoid (SOL1)
The solenoid which starts transmitting the drive to the drawer pickup clutch. The driving force is not
transmitted to the drawer pickup clutch when the pickup solenoid (SOL1) is turned OFF, and trans-
mitted when turned ON. The pickup solenoid (SOL1) rotates one turn for every one turn of the
pickup roller.
3) Drawer pickup clutch
Spring-type (mechanical) one-way clutch which used to transmit the drive from the main motor (M4)
to the pickup roller. When the pickup solenoid (SOL1) is turned OFF, the spring tension of the one-
way clutch is decreases to cut off the drive.
4) Paper empty sensor (S7)
This is a transmissive-type sensor and detects the availability of paper in the drawer. When there is
no paper in the drawer, the actuator blocks the light path of the sensor, and the sensor determines
that there is no paper.
5) Bypass pickup roller
This roller draws out a sheet of paper from the bypass tray, and transports it to the bypass feed
roller. The roller goes down and starts rotating when the drive is transmitted.
6) Bypass feed roller
This roller transports the paper from the bypass pickup roller to the registration roller.
7) Bypass separation pad
When two sheets of paper or more are transported from the bypass pickup roller, the resistance
force of the separation pad is larger than the frictional force between the sheets. As the result, the
lower paper is not transported any further.
8) Bypass sensor (S8)
This sensor detects whether paper is set in the bypass tray or not. When the paper is set in the
bypass tray, bypass feeding is performed in preference to drawer feeding. And it also detects
whether paper has been transported from the bypass tray or not (i.e. whether the leading/trailing
edge of paper has passed the bypass feed roller or not.). The sensor is also used to detect the jams
such as paper misfeeding in the bypass unit.
9) Bypass pickup solenoid (SOL2)
The solenoid which starts transmitting the drive to the bypass pickup clutch and bypass feed clutch.
The driving force is not transmitted to the bypass pickup clutch and bypass feed clutch when the
bypass pickup solenoid (SOL2) is turned OFF, and transmitted to rotate the bypass pickup roller and
bypass feed roller when turned ON.
10)Bypass pickup clutch
Spring-type (mechanical) one-way clutch which used to transmit the drive from the main motor (M4)
to the bypass pickup roller. When the bypass pickup solenoid (SOL2) is turned OFF, the spring ten-
sion of the one-way clutch decreases to cut off the drive.
December 2005 © TOSHIBA TEC e-STUDIO163/203 PAPER FEEDING SYSTEM
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