Canon NP6251 Service Manual page 75

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