COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 3EXPOSURE SYSTEMI. OUTLINE OF OPERATION ................3-1A. Varying the Reproduction Ratio.....3-1II. LENS DRIVE SYSTEM ......................3-2A. Moving of the Lens ........................3-2III. SCANNER DRIVE SYSTEM ..............3-6A. Scanner Movement .......................3-6IV. OTHERS.............................................3-20A. Original Size Detection..................3-20V. DISASSEMBLY AND ASSEMBLY......3-23A. Scanner Drive Assembly ...............3-24B. Lens Drive Assembly.....................3-32This chapter discusses the principles of operation used for the copier's lens drive unit and scannerdrive unit. It also explains the timing at which these drive units are operated, and shows how they may bedisassembled/assembled and adjusted.Download service manual and resetter printer at http://printer1.blogspot.com