Canon CANOSCAN FB330 series Service Manual page 40

CHAPTER 2
2. Calibration sequence
<Black shading data composition>
Time required
about 0.5 seconds
2 - 12
COPYRIGHT © 1999 CANON INC. CANOSCAN FB330/FB630 SERIES REV.0 OCT. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Standby
Black shading
data is required?
YES
Returns scanning unit 1 mm
Initializes buffer RAM control
Obtains 1 line of data
to buffer RAM
6 lines of data
NO
was obtained?
YES
Moves scanning unit
forward 1 mm
Black data
was transmitted?
YES
Standby
Figure 2-8-1
NO
NO