Canon CANOSCAN FB330 series Service Manual page 34

CHAPTER 2
D. Basic Sequences of CanoScan FB330P/FB630P
The basic sequences of CanoScan FB330P/FB630P are divided into power ON sequence,
calibration sequence, and document scanning sequence.
1. Power ON sequence
<Hardware setting>
Time required
about 0.7 seconds
2 - 6
COPYRIGHT © 1999 CANON INC. CANOSCAN FB330/FB630 SERIES REV.0 OCT. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Power ON
Sets CPU
Checks CPU internal
CPU internal was
checked normally?
YES
Sets gate array
Sets analog IC
Checks buffer RAM
Buffer RAM was
checked normally?
YES
1
Figure 2-6-1
NO
Sets CPU error flag
NO
Sets CPU error flag