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CHAPTER 2
2 - 3
COPYRIGHT © 1999 CANON INC. CANOSCAN FB330/FB630 SERIES REV.0 OCT. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
2. CanoScan FB630U/FB636U
Figure 2-3 shows the outline of electrical system of CanoScan FB630U/FB636U. CPU is not
equipped in the main PCB. The device driver installed in the host computer includes a control
program, which functions as CPU.
Image signals read by the contact image sensor are converted into digital data by the analog
IC. The converted image data are image-processed by the gate array, then converted into USB
data by USB to EPP bridge IC and output to the host computer via USB port.
Figure 2-3
J2
J1
J3
M1
CS1
Main PCB
Button PCB
Start button
BT1
USB to EPP
Bridge IC
Gate array
Home position
sensor
HP1
Host computer
Control
program
Contact
image
sensor
Analog
IC
Buffer RAM
Scanning unit
drive motor
USB
port
Содержание CanoScan FB 630P
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