Laser Exposure System - Canon GP605 Service Manual

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
COPYRIGHT © 1999 CANON INC.
CHAPTER 5
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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