Canon CANOSCAN FB330 series Service Manual page 71

CHAPTER 2
B. CanoScan FB630U/FB636U
CanoScan FB630U/FB636U draws its power +5 VDC from USB interface. +5 VDC is used
for the IC in the main PCB, the scanning unit drive motor and the contact image sensor.
Host computer Main PCB
Contact
image sensor
+5 VDC
USB port
Scanning unit
drive motor
Figure 2-36
2 - 43
COPYRIGHT © 1999 CANON INC. CANOSCAN FB330/FB630 SERIES REV.0 OCT. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)