Toshiba e-studio550 Service Manual page 129

9. 3. 4. General operation
[A] From power ON to standby status
(1) When the copier is turned ON, the tray-up motor is activated and 1st cassette tray starts to rise. When
the tray-up sensor is turned ON (H
this time, if the empty sensor is OFF (L), it is judged that there is no paper in the cassette. With the
empty sensor being ON (H), there is paper in the cassette. The tray stops at the raised position
regardless of availabilty of paper.
Then the tray-up motor starts to rotate in reverse and 2nd cassette starts to be lifted. 2nd cassette tray
is stopped in the same manner as 1st cassette tray and the empty sensor detects if there is paper in
the cassette.
(2) When the cassette is not completely inserted when the copier is turned ON, the tray for that cassette
is not raised. When the cassette is inserted completely, the tray is raised and checks the availability of
the paper.
(3) When either of the sensors at the transport path is ON (meaning there is paper on the transport path)
when the copier is turned ON, it is determined that a paper jam has occurred and no operation is
enabled until the paper is removed.
[B] Standby status
(1) After the tray is moved up and availability of paper is checked as described above, the copier enters
the standby state. In the standby mode, the tray remains at raised position.
(2) When a cassette is inserted or removed in the standby state, the tray is raised again to check the
availability of paper.
[C] Bypass feeding
• The bypass sensor detects the availability of paper.
• The bypass feed clutch is turned ON and the bypass pickup roller and bypass feed roller rotate.
• The bypass pickup solenoid is turned ON and the bypass pickup roller is lowered to start feeding.
• The leading edge of the paper turns ON the registration sensor and the paper is aligned with the
registration roller.
• The bypass feed clutch is turned OFF and the bypass pickup roller and the bypass feed roller are
stopped, and then the bypass pickup roller is raised.
• The registration motor is turned ON and paper is transported to the transfer unit.
[D] Cassette feeding
• The feed clutch is turned ON and the pickup roller and feed roller rotate to start feeding.
• The leading edge of paper turns ON the transport sensor, the feed clutch is turned OFF and the
transport clutch is turned ON.
• The leading edge of paper turns ON the registration sensor and paper is aligned with the registration
roller.
• The transport clutch is turned OFF and the transport roller is stopped.
• The registration motor and transport clutch are turned ON and paper is transported to the transfer unit.
e-STUDIO550/650/810 PAPER FEEDING SYSTEM
L), the tray-up motor is turned OFF and the tray is stopped. At
9 - 6 JUNE 2002 © TOSHIBA TEC