COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 3EXPOSURE SYSTEMI. OUTLINE OF OPERATION ..................... 3-1A. Changing the Reproduction Ratio ...... 3-1II. LENS DRIVE SYSTEM ............................ 3-3A. Driving the Lens ................................. 3-3III. SCANNER DRIVE SYSTEM .................... 3-6A. Outline ................................................ 3-6B. Scanner Motor Control Circuit ........... 3-7C. Relationship between Scanner Sensorand Signals ......................................... 3-7D. Basic Sequence of Operations(scanner) ........................................... 3-8E. Scanner Movement inPage Separation Mode ...................... 3-9IV. OTHERS ................................................. 3-10A. Detecting the Original Size .............. 3-10V. DISASSEMBLY/ASSEMBLY ................. 3-11A. Scanner Drive Assembly .................. 3-12B. Lens Drive Assembly ....................... 3-18This chapter discusses the principles of operation used for the copier's lens drive unit and scanner driveunit. It also explains the timing at which these drive units are operated, and shows how they may bedisassembled/assembled and adjusted.
