Pickup And Feed System; Overview/Configuration; Overview; Detection Jams - Canon L120 Series Service Manual

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2.4 Pickup and Feed System

2.4.1 Overview/Configuration

2.4.1.1 Overview

FAX-L100 / FAX-L120
[2]
[3]
[1] Face-down delivery roller
[2] Fixing pressure roller
[3] Transfer charging roller
[4] Separation pad
[5] Pickup roller
[6] Photosensitive drum
[7] Fixing film unit
Pickup and Feed Operation
The pickup/feed system consists of the main motor, solenoid, and various rollers.
The system operates as follows:
1) The DCNT board turns on the main motor (M1) immediately after it receives the print command from the SCNT board. In response, the rollers other
than the pickup roller start to rotate.
2) When the initial rotation ready state (Note) starts, the pickup solenoid (SL1) goes on for about 0.2 sec, causing the rotation of the main motor to rotate
the pickup roller.
3) The pickup cam starts to rotate in keeping with the rotation of the pickup roller. The shape of the cam causes the spring to push up the holding plate.
The paper on the holding plate is picked up by the work of the pickup roller.
4) The DCNT board sends the laser beam detection signal (/BD) to the SCNT board a specific period of time after the leading edge sensor (PS801) detects
the leading edge of print paper that has been picked up.
5) The SCNT board sends video signals to the laser/scanner assembly based on the /BD signal so as to form an image on the surface of the photosensitive
drum, making sure that the leading edge of the image and the leading edge of the print paper will match.
6) The print paper is then moved to the face-down tray for delivery by the work of the pressure roller and the face-down delivery roller.
When the initial rotation ready state:
The machine is in an initial rotation ready state when the main motor is on and, in addition, the fixing assembly temperature has reached a specific
level and the scanner motor has reached a specific revolution.

2.4.2 Detection Jams

2.4.2.1 Jam Detection Outline

2.4.2.1.1 Type so Jams

FAX-L100 / FAX-L120
[1]
PS803
PS804
[7]
[6]
PS801
PS802
[8]
SL1
[5]
[4]
M1
F-2-4
T-2-4
[8] Toner sensor
[PS801] Paper leading edge sensor
[PS802] Paper width sensor
[PS803] Delivery sensor
[PS804] Paper width 2 sensor
[M1] Main motor
[SL1] Pickup solenoid
Chapter 2
0010-2282
0010-2300
2-5

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