Canon CANOSCAN FB330 series Service Manual page 37

NOTE: If the peak light intensity
does not reach the black
level even after checking
several lines more, the
home position detection is
in error.
3
COPYRIGHT © 1999 CANON INC. CANOSCAN FB330/FB630 SERIES REV.0 OCT. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
2
Peak light intensity to CIS
reached black level?
YES
Stops scanning unit
Peak light intensity to CIS
reached black level?
YES
Detects border between
black and white
Sets HP return
distance (2 mm)
Returns scanning unit
Scanning unit
returned 2 mm?
YES
Stops scanning unit
Initializes buffer RAM control
Standby
Figure 2-6-4
CHAPTER 2
NO
Fixed feeding
limit was exceeded?
YES
NOTE: Fixed feeding is limited to A4.
Scanning unit stops at the point
the limit is exceeded even when
black area is not detected.
NO
Returns scanning unit
NO
NO
2 - 9