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COPYRIGHT
©
1999 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
CHAPTER 5
LASER EXPOSURE SYSTEM
This chapter provides descriptions on the copier's laser exposure operations,
functions of each operation, relationships between electrical and mechanical
systems, and timing at which each associated part is turned on.
I. OPERATIONS ............................ 5-1
A. Outline ................................... 5-1
B. Basic Sequence of Operations
(laser exposure system) ........ 5-4
II. GENERATING THE BD SIGNAL
................................................... 5-5
A. Outline ................................... 5-5
B. Flow of the BD Signal ............ 5-5
III. LASER DRIVER PCB .................5-7
A. Outline ................................... 5-7
B. Controlling Laser Activation ... 5-8
C. Controlling the Laser Intensity
............................................ 5-10
IV. CONTROLLING THE LASER
SCANNER MOTOR.................. 5-12
A. Outline ................................. 5-12
V. DISASSEMBLY/ASSEMBLY.... 5-13
A. Laser Unit ............................ 5-14
B. BD Unit ................................ 5-16