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AR-651/810 PAPER FEEDING SECTION 9 - 7
[E] Tandem LCF
(E-1) From power ON to standby status
(1) When the copier is turned ON, the power is supplied to start the pre-running operation. The tandem LCF
tray-up motor starts to rotate forward and raises the tray. The tandem LCF tray-up motor is turned OFF
when the tray turns ON the tandem LCF tray-up sensor, and the tray is then stopped. At this time, it is
judged whether there is paper on the feed side tray when the tandem LCF empty sensor is ON. On the
other hand, the absence of paper on the feed side tray is assumed when the sensor is OFF, and the
tandem LCF standby side empty sensor is subsequently checked. When the tandem LCF standby side
empty sensor is OFF, paper is absent on the standby side tray and it is therefore assumed that there
is no paper in the tandem LCF. When the tandem LCF standby side empty sensor is ON, paper on the
standby side tray is moved onto the feed side tray. The tandem LCF tray-up motor is rotated in reverse
and lowers the feed side tray. The lowered tray turns ON the tandem LCF tray bottom sensor, and the
tandem LCF tray-up motor is turned OFF to stop the tray. The end fence solenoid and pickup solenoid
are then turned ON. The end fence motor rotates forward and the paper on the standby side tray is
moved onto the feed side tray. The end fence motor is stopped for a second when the end fence stop
position sensor is turned ON, and the motor immediately starts to rotate in reverse to return the end
fence to the position where the end fence home position sensor is turned ON. When the returning
operation is started, the end fence solenoid and pickup solenoid are turned OFF, and the tandem LCF
tray-up motor is rotated forward to raise the tray. The tandem LCF tray-up motor is turned OFF when the
tray being raised turns ON the tandem LCF tray-up sensor and stops the tray. At this time, the pres-
ence of paper is judged when the tandem LCF empty sensor is ON.
(2) Whe the power is turned ON after the tray unit is removed, the tandem LCF tray-up motor is turned ON.
The tray is raised as soon as the tray unit detects that the tray is fully inserted.
(3) If either of the tandem LCF feed sensors is ON (there is paper at the transportation path) when turning
ON the power, a paper jam is judged and the operation is disabled until the paper is removed.
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