Toshiba e-STUDIO163, Service Manual

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© 2005 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO163/203
PAPER FEEDING SYSTEM
10 - 3
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 transports it to the registration roller. One rotation of the pickup roller transports one sheet of
paper to the registration roller.
2) Pickup solenoid (SOL1)
Starts transmission of 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, but is transmitted when it
is turned ON. The pickup roller rotates once for every one ON of the pickup solenoid (SOL1).
3) Drawer pickup clutch
This is a spring-type mechanical one-way clutch used to transmit the drive from the main motor (M3)
to the pickup roller. When the pickup solenoid (SOL1) is turned OFF, the spring tension of the one-
way clutch is decreased 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
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
Transports the paper from the bypass pickup roller to the registration roller.
7) Bypass separation pad
When two or more sheets of paper are transported from the bypass pickup roller, since the resis-
tance force of the separation pad is larger than the frictional force between the sheets, the lower
sheets are not transported any further.
8) Bypass sensor (S8)
Detects whether paper is set in the bypass tray or not. When 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 the paper has
passed the bypass feed roller or not.). The sensor is also used to detect jams such as paper mis-
sending in the bypass unit.
9) Bypass pickup solenoid (SOL2)
Starts transmission of 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 is transmitted to move down the pickup roller and rotate the
bypass pickup roller and bypass feed roller when it is turned ON.
10)Bypass pickup clutch
This is a spring-type mechanical one-way clutch used to transmit the drive from the main motor (M3)
to the cam which moves the bypass pickup roller up and down. When the bypass pickup solenoid
(SOL2) is turned OFF, the spring tension of the one-way clutch decreases so that the bypass pickup
roller moves to the upper position (standby position), and moves to the lower position (operation
position) when the solenoid is turned ON.