Canon 1730, Service Manual

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2-23
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Technical Explanation > Original Exposure and Feed System > Control of ADF > Reversal Operation
Technical Explanation > Original Exposure and Feed System > Control of ADF > Reversal Operation
● Upstream Reversal Feed Operation
After the front of the original is read, the flapper solenoid 1 (SL7) turns off and the flapper
solenoid 2 (SL6) turns on to feed the original to the upstream reversal path with the delivery
reversal flapper 1 and delivery reversal flapper 2.
When the original is fed by the registration roller, the roller release solenoid (SL8) turns on
to raise the delivery reversal roller, thus preventing the delivery reversal roller from applying
pressure to the paper.
1) The flapper solenoid 1 turns off and the flapper solenoid 2 turns on to feed the original to
the upstream reversal path.
SL
7
SL
6
Delivery reversal flapper 1
Flapper solenoid 1: OFF
Delivery reversal flapper 2
Flapper solenoid 2: ON
2) After being fed by the specified distance in the upstream reversal path, the original
stops.
SL
6
Delivery reversal flapper 2
Flapper solenoid 2: ON
Delivery reversal roller
F-2-35
F-2-36
3) The delivery reversal roller turns in the reverse direction to feed the original for back
side read. After the original arrives at the registration roller, the roller release solenoid
(SL8) turns on to raise the delivery reversal roller.
SL
6
SL
8
Delivery reversal flapper 2
Flapper solenoid 2: ON
Delivery reversal roller (upper)
Roller release solenoid: ON
Registration roller
F-2-37