Canon DR-9080C Service Manual

Also see for DR-6080: Quick reference Instructions Maintenance Guide

Contents

2 - 6 COPYRIGHT © 2003 CANON ELECTRONICS INC. CANON DR-6080/9080C REV.0 SEPT. 2003CHAPTER 2 FUNCTIONS & OPERATIONNo. ExplanationWhen documents are placed on the document tray and pick-up is started, the documenttray motor is started. The document tray is raised by a preset amount after the documenttray HP sensor is switched from ON to OFF.When the document tray is raised and the pick-up sensor detects the document, thedocument tray motor stops and the main motor is started.The pick-up motor, feed motor, and retard motor are started at the same time.When the two front registration sensors (R & L) detect the document, the pick-up motorstops and the pick-up solenoid turns ON. While the pick-up solenoid is ON, the pick-uproller retracts from the document.If there is a difference in detection timing between the front registration sensors (R & L), itindicates skewing. When roller deskew (skew correction) is selected, the document ispressed against the registration roller to perform skew correction.The registration clutch is turned ON a specified time after the front registration sensors (R& L) detect the document together.After the back registration sensor detects a document, the feed motor stops.After the end of the document passes the front registration sensors (R/L), the documenttray is raised by one sheet when both sensors detect no document.After the end of the document passes the back registration sensor, feeding of the seconddocument is started when the sensor detects no document.Same as .Same as .Same as .After the end of the document passes the front registration sensors (R & L), theregistration clutch is turned OFF when both sensors detect no document. Since thepick-up sensor is turned off, no document is detected on the document tray.After the end of the document passes the back registration sensor, the pick-up motor, feedmotor, retard motor and main motor are turned OFF a given period of time after the sensordetects no document. The document tray motor turns in reverse to lower the documenttray.A given period of time after the document tray HP sensor switches from OFF to ON, thedocument tray motor is turned OFF.Note: In high speed feeding, the second document is picked up immediately after the end of the firstdocument passes the front registration sensors (R & L) and both sensors detect no document. In slowspeed feeding, the second document is picked up a given time after both sensors detect no document,after the end of the first document passes the back registration sensor. Thus, the document feedingcan maintain specific intervals for high speed, medium speed, and slow speed feeding.Table 2-102