The tray motor [G] drives the tray drive belt [A] through a gear and the tray drive pulley. The tray drive belt [A] shifts the tray [B] up/down. ([C]: Near End Sensor, [D][E][F]: Paper Height Sensor 1 ~ 3)
After adding paper, when the upper cover is closed, the pickup solenoid [A] turns ON for the pickup roller [C] to drop down. In this state, if none of the paper height sensors are interrupted, the tray [B] shifts down until a sensor is interrupted. Then the tray shifts up.
To check the tray position, the following process is done and then the tray stops: the tray motor drives in reverse until the lift sensor [B] is not interrupted, and the tray motor drives forward until the lift sensor [B] is interrupted.
After some sheets are fed, when the top of the stack drops so that the actuator leaves the lift sensor [B], the tray motor drives forward again in order to lift the top of the paper stack to the correct position for feed.
When the tray down button [A] is pushed, the tray motor drives in reverse and the tray shifts down until the top of the paper stack reaches the stack sensor [B]. Then the tray motor [C] stops (approximately 500 sheets can be added).
The lower limit sensor [D] detects the lowest point that the tray can shift.
Tray Shift-up Trigger
- Power switch ON
- Lift sensor ON (Interrupted) while copying
- Closing the upper cover when lift sensor is ON
Lift Sensor OFF (Not Interrupted) means “shift-up stop”.
Tray Shift-down Trigger
- Pushing the tray down button
- At paper-end
Shift-down stops when the stack sensor is OFF.