Canon canoscan d660u Service Manual
CHAPTER 2
2 - 1
COPYRIGHT ©
2000 CANON INC. CANOSCAN D660U REV.0 JULY 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
I. BASIC OPERATION
A. Functions
The scanner functions are divided into the following three main systems.
1. Optical system
The optical system exposes a document by the scanning lamp and focuses the reflected light
from the document on the CCD by mirrors, a lens and a VAROS unit.
When scanning a film using FAU, turns OFF the scanning lamp to turn ON the FAU lamp,
and exposes the film by the FAU lamp and focuses the transparent light from the film on the
CCD by mirrors, a lens and a VAROS unit.
from the document on the CCD by mirrors, a lens and a VAROS unit.
When scanning a film using FAU, turns OFF the scanning lamp to turn ON the FAU lamp,
and exposes the film by the FAU lamp and focuses the transparent light from the film on the
CCD by mirrors, a lens and a VAROS unit.
2. Image processing system
The image processing system converts the analog image signal focused on the CCD into
digital data and performs image processing.
digital data and performs image processing.
3. Control system
The control system controls the interface with the host computer and the whole operation of
the scanner.
the scanner.
Figure 2-1
Host
computer
FAU
Scanning
lamp
Lens
Scanning
unit
Optical system
Image processing system
Control
system
CCD
BGR
B
G
R
R
Drive motor
VAROS
unit
FAU inverter PCB
FAU lamp