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Original Pick-up
Paper Feed
When an original is placed on the original tray, its leading edge raises the feeler of the original set sensor and the sensor detects the original.
Pick-up Roller
When there is no original on the original tray, the pick-up roller [C] swings up to the limit of its vertical movement.
To lower the pick-up roller, the pick-up roller motor [A] rotates the lift cam [E] which lowers the pick-up arm [D] and the pick-up roller.
When the pick-up roller is lowered, the pick-up roller motor [A] switches on.
When the actuator switches off the bottom plate position sensor [B], the pick-up roller motor goes off, and then the lift cam [E] holds the roller up.
Pick-up Roller Down Timing
The pick-up roller lowers:
When an original (or stack of originals) is set on the original table.
When the trailing edge of the original passes the sensor (but, it does not lower for the last original).
For A4/LT LEF when the leading edge reaches the registration sensor.
Pick-up Motor On/Off Timing
The pick-up motor switches ON:
When the original set sensor detects the leading edge of the original.
Just after the machine is turned on The pick-up motor switches OFF:
When the original feed cover is open.
When an original jams in the ADF paper path.