Recording Paper Pickup Function; Paper Size Error - Canon LASER CLASS 730i Service Manual

3.1 Recording Paper Pickup Function

(from Multi-purpose (MP) tray)
In case of paper pickup from the MP tray, while the main motor rotates, the MP tray pickup
solenoid is turned ON. Then, the MP tray pickup roller rotates, and a sheet of paper is fed into
the printer section.
Up to 100 pages (80 g/m
movable paper guides can be adjusted for recording paper.
(from cassette)
In case of paper pickup from the cassette, while the main motor rotates, the pickup solenoid is
turned ON. Then, cassette pickup roller, feed roller rotate, and a sheet of paper is fed into the
printer section.
(from duplex feed unit)
While the Face-up tray is closed, the paper eject sensor detects the trailing edge of the recording
paper, and about in 0.1 second, the ECU board rotates the reverse motor in the
counterclockwise, sending the paper to the duplex feed unit.
When the paper reaches the reverse paper sensor and about 0.68 second passes, the ECU board
turns the duplex solenoid ON to rotate the oblique roller. The recording paper is transported by
the oblique roller, with its right side touching the standard plate. This corrects the skew of the
paper. The paper is then sent to the registration roller. During this operation, if next paper is
picked up, the duplex-fed recording paper stops at the specified position (about 0.74 second
passes after the duplex paper sensor detects the paper).
Then the following paper reaches the page top sensor, the specified period of time passes, and
the duplex-fed paper is transported again.
The re-transported paper is printed with the other side and delivered to the output tray.

3.1.1 Paper size error

The machine does not have a paper size sensor. It recognizes the paper sizes (Letter, A4, and
Legal etc.) according to the user data setting.
A paper size error occurs if the specified paper size is different from the size of the paper
placed in the MP tray and cassette when one page is actually printed.
In this case, a message INCORRECT PAPER SIZE appears on the display, the Alarm lamp
blinks.
LASER CLASS 730i/720i/710 Chapter 2: Technical Reference
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) can be loaded into the MP tray at one time and the position of the
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