Document Feeding/Delivery; Basic Operation - Canon H1 Service Manual

Color image reader unit
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2
Technology > Controls (DADF) > Document Feeding/Delivery > Basic Operation
Reversal/feed 1
When the trailing edge of the fed document moves past the delivery reversal sensor (SR3),
the pickup/feed motor stops. Immediately after this, the pickup/feed motor starts turning in the
reverse direction to feed the document to the registration roller, then it stops. At this time, the
pressurization solenoid (SL2) turns on to release the delivery reversal roller.
M1
S
L
2
Delivery reversal sensor
Reversal/feed 2
The pickup/feed motor turns to feed the document to the reading wait point and stops.
Thus, the document has been reversed. Next, the document is picked up again and its
reverse side is read, turning off the pressurization solenoid. After this, the
document is reversed again, fed, and then delivered.
Registration roller
M1
CL2
S
L
2
Read roller 1
Reading wait position
2
Technology > Controls (DADF) > Document Feeding/Delivery > Basic Operation
M1
S
L
2
F-2-40
M1
Delivery reversal
roller
S
L
2
F-2-41

Document Feeding/Delivery

■ Basic Operation

After completion of stream reading on the document glass, the document is delivered to the
document delivery unit as discussed below.
Document feed/delivery
After moving past the reading position, the document is fed by the read roller 2 and delivery
reversal roller driven by the pickup/feed motor (M1) which is turning in the reverse direction.
The delivery reversal roller is normally pressurized; the Shift solenoid (SL2) turns on only
when the document is reversed for duplex printing.
M1
Delivery reversal
roller
S
L
2
Reading position
2-23
M1
S
L
2
F-2-42
2-23

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