Shutter Operation - Canon J1 Service Manual

2
Technology > Stack Tray Unit > Shutter Operation
Paper surface sensor (PI114)
Tray 2 paper surface
sensor (PI115)
Detected items
Area sensor 1
(PCB4)
Tray 1 upper limit OFF
Stack count 500 sheet limit exceeded ON
Stack count 1000 sheet limit ON
exceeded
Tray 1 lower limit ON
Detected items
Area sensor 1
(PCB5)
Tray 2 upper limit OFF
Stack count 500 sheet limit ON
exceeded
Stack count 1000 sheet limit ON
exceeded
Tray 2 lower limit (finisher) OFF
Tray 2 lower limit (saddle finisher) OFF
* The symbol for the area sensor of each PCB is same because tray 1/tray 2 shift area sensor
PCBs are the same board.
2
Technology > Stack Tray Unit > Shutter Operation
Paper surface sensor flag
Edge
Tray 1
Paper surface
sensor flag
Edge
Tray 2
F-2-20
Tray 1 shift area sensor PCB
Area sensor 2 Area sensor 3
(PCB4) (PCB4)
OFF OFF
ON OFF
OFF OFF
OFF ON
T-2-2
Tray 2 shift area sensor PCB
Area sensor 2 Area sensor 3
(PCB5) (PCB5)
ON OFF
ON OFF
OFF OFF
OFF OFF
OFF ON
T-2-3

Shutter Operation

When tray 1 passes the delivery section with paper already stacked, the stacked paper may
get caught by the delivery section.
A shutter is provided at the delivery section to prevent this.
The shutter closes when tray 1 passes the delivery section.
This is performed even when no paper is stacked.
When the shutter clutch (CL101) and stack ejection lower roller clutch (CL102) are ON, the
shutter moves up (close) when the stack ejection motor (M102) turns forward and moves
down (open, delivery enabled) when the motor turns backward.
The open/close of the shutter is detected by the shutter home position sensor (PI113).
Stack ejection lower roller clutch (CL102)
Stack ejection motor (M102)
Shutter home position
sensor (PI113)
Shutter
Shutter clutch (CL101)
2-13
Stack ejection
roller (lower)
F-2-21
2-13