Detection Jams; Jam Detection Outline - Canon MF3110 - ImageCLASS Laser Multifunction Service Manual

Chapter 2
Pickup and Feed Operation (from the cassette)
If the cassette paper sensor detects the presence of paper while the absence of paper is identified in the manual feed
pickup assembly, the machine picks up paper from the cassette.
When the main motor operates and the cassette pickup solenoid goes on, the cassette pickup roller makes a single
rotation to pick up paper. The paper is then moved from the transfer assembly to the fixing assembly by the feed
roller; it is ultimately delivered outside the machine by the work of the delivery roller.
When the face up cover is open, the paper is delivered face up at the rear of the machine. If the face up cover is
closed, on the other hand, the paper is moved along the feed guide of the cover, and is delivered face down at the top
of the machine by the work of the face down delivery roller.
Pickup and Feed Operation (from the manual feed section)
When paper is inserted into the pickup assembly, the manual feed paper sensor detects the presence of paper, and the
machine uses the feed roller to pick and hold the leading edge of the paper. When printing starts, the machine turns
on the manual feed pickup solenoid to stop the rotation of the feed roller so that the paper will not move forward until
the laser/scanner and the fixing unit become ready for operation. When the laser/scanner and the fixing unit become
ready for operation, the machine turns off the manual feed pickup solenoid to rotate the feed roller, thus moving the
paper forward; the operation thereafter is identical to the operation used for pickup from the cassette.

2.4.2 Detection Jams

2.4.2.1 Jam Detection Outline

2.4.2.1.1 Type so Jams
0003-0655
The machine identifies the following types of jams:
Pickup Delay Jam
The top sensor does not go on within a specific period of time after pickup starts.
Pickup Stationary Jam
The top sensor goes on, but does not go off within a specific period of time.
Delivery Delay Jam
The top sensor goes on, but the delivery sensor does not go on within a specific period of time.
Wrap Jam
The delivery sensor goes on, but it goes off before a specific period of time passes.
Delivery Stationary Jam
The delivery sensor goes on, but it does not go off within a specific period of time.
Initial Jam
The top sensor or the delivery sensor goes on while the main motor is starting to rotate.
Cover Open Jam
The machine identifies a condition in which the front cover is opened while it is moving paper.
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