Canon 7086 Series Service Manual - page 206
Chapter 5
5-20
F-5-46
[1] 1st half even-numbered pixel analog image signal
[2] 1st half odd-numbered pixel analog image signal
[3] 2nd half even-numbered pixel analog image signal
[4] 2nd half odd-numbered pixel analog image signal
[5] 1st half digital image signal
[6] 2nd half digital image signal
2. Digital Image Processing
- shading correction
F-5-47
[1] 1st-half digital image signal
[2] 2nd-half digital image signal
5.3.6.2 Overview
0011-2248
iR7086
The PCBs used in the image processing system have the following functions:
CDD/AP PCB: CCD drive, analog image processing, A/D conversion
Reader controller PCB: shading correction
F-5-48
1. Analog Image processing
- CCD drive
- CCD output gain correction, offset correction
- CCD output A/D conversion
CCD
Analog image
process
- gain correction
- offset correction
A/D
conversion
Analog
image
signal
CCD/AP PCB
CCD drive
control
Gain correction
data
20bit
J101
J204
20bit
CCD control
signal
A12V
A5V
Gain correction
data
[2]
[1]
[2]
Analog image
process
- gain correction
- offset correction
[3]
[4]
[5]
[6]
[4] [3]
J102
J208
[1]
A/D
conversion
Gain correction data
EEP-ROM
SRAM
CPU
CCD/AP
PCB
Reader controller PCB
20bit
8bit
Target
value
J101
J204
[1]
[2]
[1]
[2]
Shading correction
J102
J208
J202
20bit
8bit
CCD/AP PCB
Reader controller
PCB
CCD
A/D
conversion
Shading processing
Analog image
processing
Analog image processing block
Controller
block
Digital image processing block