COPYRIGHT © 2001 CANON INC. CANOSCAN D1230U/D2400U REV.0 MARCH 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2
OPERATION AND TIMING
I.
BASIC OPERATION ........................ 2-1
A.
Functions ................................. 2-1
B. Electrical System ..................... 2-2
C. Main PCB Input and Output ... 2-4
D.
Document Scanning
Sequence ................................. 2-6
II.
OPTICAL SYSTEM .......................... 2-7
A.
Outline ..................................... 2-7
B.
Lamp Lighting Circuit .............. 2-8
C.
FARE (Film Automatic Retouching
and Enhancement) ................. 2-10
D.
Motor Control Circuit ............ 2-12
III. IMAGE PROCESSING .................... 2-13
A.
Outline ................................... 2-13
B.
Image Processing ................... 2-13
IV. CONTROL SYSTEM ...................... 2-20
A.
Control System Diagram ........ 2-20
B.
Main PCB ............................... 2-20
V.
INTERFACE ................................... 2-21
A.
Outline of USB Standard ........ 2-21
B.
Benefits of USB Scanner ........ 2-21
C.
Signal Definitions .................. 2-22
D.
Interface Connection ............. 2-22
VI. POWER SUPPLY ........................... 2-23