Canon 1120 Service Manual page 9

2. Bank Note Detection
Mechanism .................... 4-14
P. CMYBk/RGB Integration ..... 4-15
Q. Texture Processing ............. 4-15
R. Color Conversion ................ 4-15
V. DISASSEMBLY/ASSEMBLY .... 4-16
A. Electrical Parts .................... 4-17
CHAPTER 5 LASER EXPOSURE SYSTEM
I. OPERATIONS .............................5-1
A. Functions................................5-1
B. Sequence of Operations
(laser exposure system) .........5-2
II. GENERATING THE BD
SIGNAL .......................................5-3
III. LASER DRIVER CIRCUIT ..........5-4
A. Controlling the Laser
System ...................................5-4
B. Controlling the Temperature
of the Laser Unit .....................5-5
IV. LASER SCANNER MOTOR .......5-6
CHAPTER 6 IMAGE FORMATION SYSTEM
I. IMAGE FORMATION SYSTEM ..... 6-1
A. Outline ....................................6-1
B. Controlling
the C Sensor ..........................6-3
C. Sequence of Operations (image
formation system) ..................6-7
II. IMAGE STABILIZATION ..............6-8
A. Outline ....................................6-8
B. Controlling the Surface Potential
of the Drum ......................... 6-10
1. Outline ........................... 6-10
2. Measuring the Surface
Potential of the Drum .... 6-10
3. Measuring the Dark Area
Potential Attenuation ..... 6-11
4. Controlling the Environment
Contrast Potential .......... 6-11
5. Setting the Grid Bias and
the Developing Bias ...... 6-12
COPYRIGHT © 1999 CANON INC. CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
1. Removing the CCD
Unit ................................ 4-17
2. Removing the Analog
Processor PCB ............. 4-18
3. Removing the Image
Processor PCB (IP-MAIN,
IP-ED, IF, IP-ECO) ........ 4-19
V. DISASSEMBLY/ASSEMBLY .......5-7
A. Electrical Parts .......................5-8
1. Removing the Original
Scanner Motor
Dirver PCB .......................5-8
2. Removing the Laser
Scanner Unit ....................5-8
3. Removing the Laser
Controller PCB/Laser
Driver PCB .................... 5-10
4. Adjusting Laser Power .. 5-11
5. Adjusting the Laser ....... 5-13
6. Sequence of Operations
(initial drum surface
potential control timing) .. 6-13
7. Auto Gradation Correction in
User Mode .................... 6-14
8. Checking the LED Activation
for the Potential
Measurement Circuit ..... 6-14
III. CONTROLLING THE CHARGING
MECHANISM ........................... 6-17
A. Controlling the Primary
Charging Mechanism and
the Grid Bias ....................... 6-17
1. Operation ...................... 6-17
2. Protection Circuit ........... 6-17
B. Controlling the
Developing Bias .................. 6-18
1. Operation ...................... 6-18
2. When Controlling the M
Developing Bias ............ 6-19
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