Canon F-1, Service Manual

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Technology > Controls > DADF > Original Pickup Tray Assembly
Technology > Controls > DADF > Original Pickup Tray Assembly
b. Pickup completion
1) When the original sensor (SR1) cannot detect an original, the tray lifter motor (M8) drives
the tray lifter arm (opposite direction to at the time of pickup) to move down the original
pickup tray.
2) Once the tray home position sensor (SR13) detects that the tray lifter arm is shifted down
to the lowest position, the pickup roller unit lifter motor (M10) starts driving to rotate the
cam downward.
3) Downward shifting of cam makes the pickup roller unit return to the pre-pickup position and
pickup operation completes.
[1] Pickup roller unit lifter motor drive signal
[2] Pickup roller unit lifter home position detection signal
[3] Tray home position detection signal
[4] Tray lifter motor drive signal
M10 M8
[2] [3]
SR12
SR13
[1] [4]
DADF driver PCB
F-2-88
Note : Additional functions (Timing to Raise Feeder Tray)
To reduce the time from when the start key is pressed until pickup is stared, the timing
for moving up the original pickup tray can be specified in additional function mode.
Setting is available as follows.
• When Start is pressed: the original pickup tray starts moving up when a start key is being
pressed. (default)
• From Panel: the original pickup tray starts moving up when any key or button is navigated
on a control panel after an original has been placed.
The lifter drive of the original pickup tray enables the stacking of 300 sheets (80 g/m2)
and stream scanning; however, it takes time for the original pickup tray to be moved up
to the pickup position in the case of scanning of small number of originals (such as 1
sheet of original).
Time for pre-pickup operation after pressing the start key can be reduced by making the
original pickup tray start moving up upon navigating the control panel.
Error Code
E401 (Pickup roller unit up/down error)
-0001 Even though the pickup roller unit lifter motor (M10) is driven, the level of the pickup roller
unit lifter home position sensor (SR2) does not change within the specified time.
-0002 Even though the pickup roller unit lifter motor (M10) is driven, the level of the pickup roller
unit lifter home position sensor (SR12) does not change within the specified time.
E407 (Tray up/down motor error)
-0001 Even though the tray lifter motor (M8) is driven, the tray home position sensor (SR13) is
not turned ON or OFF within the specified time.
-0002 Even though the tray lifter motor (M8) is driven, the paper surface sensor (SR6) is not
turned ON or OFF within the specified time.