Canon FY8-13FW-000DADF-A1 Service Manual

Contents

COPYRIGHT © 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2-47CHAPTER 2 BASIC OPERATIONK. Detecting Original JamsMS1 MS2M4S14S4S1S7S3S8S12S6S1 Original tray papersensorS3 Registration paper sensorS4 Upper cover sensorFigure 2-269The timing at which the machine checks for jams is stored in memory in the microprocessor onthe DADF controller PCB, and a jam is detected in terms of the presence/absence of paper at aspecific sensor at the time.When a jam is detected, the machine communicates the fact to the copier in the form of a code.(Some copiers show such codes in service mode.)Jam typeOriginal retractionPick-up delayRegistration delaySensor typeS1,S7 01H02H03HS3,S7S7Description CodePick-upThe sensor S7 does not detect the leading edge of an original1500 msec after the pick-up motor (M1) has turned on and, inaddition, the sensor S1 does not detect an original.The sensor S7 does not detect the leading edge of an original1500 msec after the pick-up motor (M1) has turned on.The sensor S3 does not detect the leading edge of an original350 msec after the sensor S7 has detected the leading edge ofan original.Table 2-209aS6 Delivery sensor 1S7 Pick-up sensorS8 Reversal sensorS12 Delivery sensor 2S14 Re-circulation sensorMS1 DADF switchMS2 Upper cover switch