Canon MF4690 - ImageCLASS B/W Laser Service Manual

Also see for ImageCLASS MF4690: Reference guide Instructions Starter Guide Operation guide Driver guide

Contents

Chapter 77-17.1 Overview/Configuration7.1.1 Overview 0016-1844The pickup/feeding system is the part to pickup and feed a paper, and it is composed of the main motor, solenoid, and various motors.In this machine, a paper is picked up from either the pickup tray or the manual feed tray, and it is delivered from the delivery tray.A paper set in either the pickup tray or the manual feed tray is picked up with the same pickup roller. Then, it is fed to the photosensitive drum, transfer chargingroller, fixing film, pressure roller, and face-down delivery roller, in that order, and is delivered to the delivery tray.On the feed path of a paper, the following 4 photointerrupters are allocated: the leading edge/paper width sensor (PS801, PS802), delivery sensor (PS803), anddelivery paper width sensor (PS804), and they detect either the arrival or passage of paper.If a paper does not arrive or pass each sensor, except the fixing paper width sensor, within the predetermined time, CPU on the DCNT board judges as a jam andnotify the occurrence of jam to the SCNT board.The diagrammatic illustration for each motor, solenoid, and sensor is shown below.F-7-1[1] Face-down delivery roller[2] Pressure roller[3] Fixing film unit[4] Transfer charging roller[5] Photosensitive drum[6] Pickup roller[7] Separation pad[8] Manual feed tray[9] Pickup trayM1: Main motorSL1: Pickup solenoidPS801: Leading edge sensorPS802: Paper width sensorPS803: Delivery sensorPS804: Delivery paper width sensor7.2 Other Control7.2.1 Overview 0016-1845Pickup/Feed OperationThe pickup/feed assembly is the mechanism to pickup and feed paper one at a time from the pickup tray or the manual feed tray.SCNT [1]PS804PS803[3][2][4] [5]PS801PS802SL1 [6][7]M1[8][9]