Canon fb1210u サービスマニュアル
CHAPTER 2
2 - 1
COPYRIGHT
©
2000 CANON INC. CANOSCAN FB1210U REV.0 APR. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
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Host
Computer
Optional Film Adapter Unit FAU S-11
Scanning
Lamp
Lens
Scanning
Unit
Optical System
Drive
Motor
Image Processing System
Control
System
CCD
BGR
B
G
R
G
R
I. BASIC OPERATION
A. Functions
The scanner functions are divided into the following three main systems.
1. Optical System
The optical system consists of the scanning lamp, lens and mirrors. It exposes a document,
then the reflected light from the document is collected onto a light-sensitive device CCD
(charge-coupled device ) via the lens and mirrors.
then the reflected light from the document is collected onto a light-sensitive device CCD
(charge-coupled device ) via the lens and mirrors.
2. Image Processing System
The image processing system consists mainly of the CCD, analog IC, and ASIC. It converts
analog signals from the CCD into digital signals, which is read by the host computer.
analog signals from the CCD into digital signals, which is read by the host computer.
3. Control System
The control system consists mainly of ASIC, USB controller, CPU, and motor driver. The CPU
controls the whole scanning operation. The USB controller controls the interface between the
CPU and ASIC, while the CPU interprets all commands from the host computer.
controls the whole scanning operation. The USB controller controls the interface between the
CPU and ASIC, while the CPU interprets all commands from the host computer.
Figure 2-1