CHAPTER 2
2 - 10
COPYRIGHT © 1999 CANON INC. CANOSCAN FB330/FB630 SERIES REV.0 OCT. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Figure 2-6-5
****
RAM*
1********
1*****
4
L E D **
********
4
Detects border between
black and white
Sets detection mode for border
between black and white
NO
NO
YES
Peak light intensity to CIS
reached white level?
Stops scanning unit
Fixed feeding
limit (max. 15 mm) was
exceeded?
White level in
both ends of the obtained
data is normal?
NO
YES
NO
YES
Scanning unit
moved forward more
than 2 mm?
Standby
G LED ON
Sets document feed distance
(max. 15 mm)
Moves scanning unit forward
YES
Obtains 1 line of data
to buffer RAM
Moves 1 line
Sets error flag
G LED OFF