Canon 1000 Service Manual page 43

OPERATIONS AND TIMING
I. BASIC MECHANISMS ............................. 3-1
A. Functional Construction ..................... 3-1
B. Outline of Electrical Circuitry ............. 3-2
C. Inputs to and Outputs from
Major PCBs ....................................... 3-3
D. Sequence of Basic Operations ........ 3-26
II. ORIGINAL EXPOSURE
SYSTEM ................................................ 3-29
A. Outline ............................................. 3-29
B. Sequence of Basic Operations
(original exposure system) .............. 3-30
C. Scanner Motor ................................. 3-32
D. Changing the Reproduction Ratio ... 3-33
E. Controlling the Intensity of the
Scanning Lamp ................................ 3-34
III. IMAGE PROCESSING
SYSTEM ................................................ 3-36
A. Outline ............................................. 3-36
B. CCD/CCD Driver ............................. 3-37
C. Analog Image Processing ................ 3-38
D. Digital Image Processing ................. 3-39
IV. LASER EXPOSURE SYSTEM .............. 3-62
A. Outline ............................................. 3-62
B. Sequence of Operations
(laser exposure system) .................. 3-64
C. Laser Scanner Motor ....................... 3-65
D. Generating the BD Signal ................ 3-66
E. Video Controller ............................... 3-67
F. Laser Driver ..................................... 3-72
G. Image Position Correction ............... 3-74
V. IMAGE FORMATION SYSTEM ............. 3-84
A. Outline ............................................. 3-84
COPYRIGHT © 2001 CANON INC.
CHAPTER 3
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
B. Basic Sequence of Operations
(image formation system) ................ 3-86
C. Stabilizing Images ........................... 3-87
D. Primary Charging Assembly ............ 3-97
E. Developing Assembly .................... 3-102
F. Cleaning the Photosensitive Drum 3-120
G. Controlling the Transfer Unit
Charging Mechanism ..................... 3-122
VI. PICK-UP/FEEDING
ASSEMBLY .......................................... 3-127
A. Outline ........................................... 3-127
B. Pick-Up Assembly ......................... 3-130
C. Paper Deck .................................... 3-145
D. Duplexing Unit ............................... 3-151
E. Transfer Unit .................................. 3-160
F. Pre-Fixing Feeding ........................ 3-177
G. Fixing/Delivery Assembly .............. 3-178
H. Detecting Jams .............................. 3-189
VII. CONTROL PANEL ............................... 3-192
A. Outline ........................................... 3-192
B. Operation ....................................... 3-192
VIII. EDITOR ............................................... 3-195
A. Outline ........................................... 3-195
B. Operation ....................................... 3-195
C. Zero-Level Adjustment
for Input Coordinates ..................... 3-197
IX. FANS .................................................... 3-198
X. POWER SUPPLY ................................. 3-201
A. Power Supply ................................. 3-201
B. Protection Mechanisms for the
Power Supply Circuits .................... 3-201