Service manual

COPYRIGHT  2003 CANON INC. CANOSCAN 9900F REV.0 FEB. 2003 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
........................................... 2-5
II. OPTICAL SYSTEM ..................... 2-6
A. Outline ................................ 2-6
B. Lamp Lighting Circuit ......... 2-7
C. FARE (Film Automatic Retouching
and Enhancement) .............. 2-9
D. Motor Control Circuit ........ 2-11
III. IMAGE PROCESSING ............... 2-12
A. Outline .............................. 2-12
B. Image Processing............... 2-12
IV. CONTROL SYSTEM .................. 2-17
A. Control System Diagram.... 2-17
B. Main PCB .......................... 2-17
V. INTERFACE ............................. 2-18
A. USB ................................... 2-18
B. IEEE 1394 ......................... 2-19
VI. POWER SUPPLY ....................... 2-20