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COPYRIGHT © 1999 CANON INC.
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
vi
A.
Outline .................................... 3-8
B.
Controlling the Temperature by a
Fluorescent Lamp Heater .... 3-10
C. Controlling Pre-Heat Voltage
............................................. 3-10
D. Initial Activation .................... 3-11
E.
Detecting an Error ................ 3-12
IV. DETECTING THE ORIGINAL SIZE
.................................................. 3-14
A.
Outline .................................. 3-14
B.
Detection by Original Sensors
............................................. 3-14
C. Detection by the Feeder ...... 3-14
V.
DISASSEMBLY/ASSEMBLY .... 3-15
A.
No. 1 Mirror Mount ............... 3-16
1.
Removing the Scanning
Lamp/Scanning Lamp Heater
........................................ 3-16
2.
Points to Note When
Replacing the Scanning Lamp
........................................ 3-19
3.
After Replacing the Scanning
Lamp ............................... 3-19
B.
Scanner Drive Assembly ..... 3-20
1.
Removing the Scanner Motor
........................................ 3-20
2.
Scanner Drive Cable ...... 3-21
C. PCBs .................................... 3-28
1.
Removing the Light Intensity
Control PCB .................... 3-28
2.
Removing the Inverter PCB
........................................ 3-29
D. Others .................................. 3-31
1.
Removing the Original Size
Sensor (1/2) .................... 3-31
2.
Removing the Original Size
Sensor (3/4) .................... 3-32
3.
Removing the Scanner Home
Position Sensor .............. 3-33
4.
Removing the Copyboard
Glass ............................... 3-33
5.
Removing the Image Leading
Edge Sensor ................... 3-34
6.
Removing the Standard White
Plate ................................ 3-35
7.
After Replacing the Standard
White Plate ..................... 3-36
CHAPTER 4 IMAGE PROCESSING SYSTEM
I.
OUTLINE ..................................... 4-1
II.
ANALOG IMAGE PROCESSING 4-4
A.
Outline .................................... 4-4
III. DIGITAL IMAGE PROCESSING 4-6
A.
Outline .................................... 4-6
B.
Image Procesing Functional
Block ...................................... 4-7
C. Shading Correction ................ 4-9
D. Line Conversion ................... 4-10
E.
Editing .................................. 4-11
F.
Density Processing .............. 4-12
1.
Outline ............................ 4-12
2.
Density Adjustment during
Printing ............................ 4-14
G. Binary Processing ................ 4-15
1.
Dither Screen Method ..... 4-15
2.
Random Error Diffusion (R-
ED) Method ..................... 4-16
H. Image Memory ..................... 4-17
I.
Detecting the Orientation of
Originals ............................... 4-19
J.
Black Pixel Count ................. 4-20
IV. DISASSEMBLY/ASSEMBLY .... 4-21
A.
CCD PCB ............................. 4-22
1.
Removing the CCD PCB
........................................ 4-22
2.
After Replacing the CCD Unit
........................................ 4-23
B.
Image Processor PCB ......... 4-24
1.
Removing the Image
Processor PCB ............... 4-24
2.
After Replacing the Image
Processor PCB ............... 4-25
C. Hard Disk (image server) ..... 4-26
1.
Removing the Hard Disk
(image server)................. 4-26
2.
After Replacing the Hard Disk
(image server)................. 4-26
D. Others .................................. 4-27
1.
Removing the System
Motherboard ................... 4-27
2.
Removing the Memory Board
........................................ 4-28
3.
Removing the Various Printer
Boards ............................ 4-28
4.
Removing the Original
Detection PCB ................ 4-29
Содержание GP605
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