Control System; Control System Diagram; Main Pcb - Canon CANOSCAN D1230 series Service Manual

CHAPTER 2
IV. CONTROL SYSTEM
A. Control System Diagram
Host Computer
Control
Program
USB
Controller
DRAM
B. Main PCB
The scanner is not equipped with CPU. The device driver installed in the host computer
includes a control program, which functions as CPU. Control program sends a command to the
ASIC in the main PCB, the ASIC controls the whole electrical circuits and image processing of
the scanner.
Main PCB consists of ASIC, DRAM, USB controller, analog I/C and motor driver.
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COPYRIGHT

Main PCB

Analog
IC
ASIC
Motor
Driver
Drive Motor
Figure 2-21
©
2001 CANON INC. CANOSCAN D1230U/D2400U REV.0 MAR. 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
+12V
AC Adapter
Scanning Unit
Inverter &
Scanning Lamp