Canon F-1, Service Manual

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Technology > Controls > DADF > Original Pickup Tray Assembly
Technology > Controls > DADF > Original Pickup Tray Assembly
Pickup Operation
a. Pickup start
1) A use presses the start key or navigates the control panel (see Note : Additional functions
(Timing to Raise Feeder Tray)).
2) The pickup lifter motor (M10) starts driving and the cam that holds the pickup roller unit
rotates upward.
3) Upward shift of the cam makes the pickup roller unit tilt toward the original pickup tray and
the pickup roller is moved down.
[1] Pickup roller unit lifter motor drive signal
[2] Pickup roller unit lifter home position detection signal
[3] Tray home position detection signal
M10
[2] [3]
SR12
SR13
[1]
Tray lifter arm
Cam Original
Pickup
roller unit
DADF driver PCB
F-2-86
4) Tray lifter motor (M8) starts driving and the tray lifter arm pushes the original pickup tray
(upper) upward.
5) The pickup roller unit is pushed up until the original contacts the pickup roller unit and the
paper surface sensor (SR6) detects it.
6) The tray lifter motor (M8) stops driving once the paper surface sensor (SR6) detects the
pickup roller unit.
7) The machine executes pickup (after the start key is pressed)(see Note : Additional functions
(Timing to Raise Feeder Tray)).
8) If the paper surface sensor (SR6) cannot detect the pickup roller unit during pickup, the tray
lifter motor (M8) starts driving and the original pickup tray is again moved up until the paper
surface sensor (SR6) detects the pickup roller unit.
[Reference] Technology > Controls > Original Pickup Assembly > Original Pickup/Separation
Control
[1] Paper surface detection signal
[2] Tray lifter motor drive signal
M8
SR6
[2] [1]
DADF driver PCB
F-2-87