Image Processing - Canon imageRUNNER ADVANCE C350 series Service Manual

2
Technical Explanation > Original Exposure and Feed System > Image Processing > Overview

Image Processing

■ Overview
The image processing is executed by the CIS Unit (AFE) and the Main Controller PCB.
The functions related to the image processing are shown below:
Processing part
CIS Unit (AFE) Contact Image Sensor (CIS)
Original Reading Sensor Drive
LED Intensity Adjustment
Analog Control Performed by the CIS
Original Reading Sensor Output Gain Correction and Offset Correction
Original Reading Sensor Output A/D Conversion
Main Controller Communication with CIS Unit (AFE)
(Reader ASIC)
Shading Correction
Dust Detection Control
2 Technical Explanation > Original Exposure and Feed System > Image Processing > Overview
Function
T-2-7
6ch CIS
LED
Control Signal 2
LED
Drive IC
Sensor
Sensor
Sensor
Sensor
Sensor
Sensor
Sensor
Sensor
Sensor
1
ADF Sensor
2
Motor
3
Sensor
AFE
4
5
Reader
Sensor
6
Motor
LED
Drive IC
LED
Control Signal 1
ADF+Reader
Printer
Motor
Reader ASIC
Driver
(cheddar)
Motor
Driver
Controller
(CB)
2-14
4ch CIS
LED
Sensor
1 1
Sensor
2 2
Sensor
3 3
Sensor
4 4
Sensor
5 5
Sensor
6 6
Sensor
7 7
Sensor
8 8
Sensor
9 9
Sensor
10 10
1
Sensor
2
11 11
3
AFE Sensor
4
12 12
LED
F-2-18
2-14