Document Size Detection - Canon iR C1020 Series Service Manual

3) The ADF pickup motor rotates in reverse. The document is fed through the reverse path.
When the ADF paper trailing edge sensor detects the lead edge of the document, the ADF pickup motor stops.
As soon as receiving a drive signal from the main controller, the ADF pickup motor rotates forward. In this condition, the ADF delivery rollers are disengaged
by driving the ADF pickup solenoid (SL5016) so that the document is not pulled.
4) When the trailing edge of the document passes through the ADF delivery roller, the ADF pickup solenoid is turned OFF and the ADF delivery rollers are engaged.
5) When a specified period of time (time until the trailing edge of the document passes through the ADF delivery roller) elapses after the trailing edge of the doc-
ument passes through the ADF paper trailing edge sensor, the ADF pickup motor stops.
In the case of double-sided document reading, the ADF pickup roller has already moved up to a specified position.

6.2.2 Document Size Detection

The machine does not perform document size detection. (The machine is not equipped with the document size sensor.)
The machine performs reading in the size specified on the control panel when reading the document.
Reverse path
SL5016
SR719
M13
ADF pickup roller
ADF delivery roller
SL5016
SR719
M13
ADF delivery roller
F-6-11
F-6-12
Chapter 6
0019-8973
6-5