Control System; Iv. Control System - Canon DR-1210C Service Manual

IV. CONTROL SYSTEM

1. Control Block Diagram
The main PCB controls this machine.
However, it has no firmware. The low level
driver (LLD), which is installed on the com-
puter in conjunction with the driver, has the
functions as a firmware. When the scanning
start command is executed, the scanning
conditions are written on the memory for
controller (IC1) on the main PCB.
Operation
panel
Reading
unit
COPYRIGHT © 2006 CANON ELECTRONICS INC.
Scanner
motor
Flash
Motor
ROM
driver
(IC13) (IC14)
Controller
SDRAM
(IC7)
Analog
processor
(IC8)
Figure 2-401
CANON DR-1210C FIRST EDITION FEB. 2006
CHAPTER 2 FUNCTION & OPERATION
In addition, the operation panel is
equipped with an operation PCB for the
operation buttons and a liquid-crystal mod-
ule (LCM) for display.
The figure below shows a control block
diagram of the main PCB and the functions
of major ICs.
Feeder
Motor
driver
(IC12)
(IC1)
X'tal 12MHz
DC/DC
converter
(IC2/IC4/IC6)
Regulator
(IC3/IC5)
Main PCB
USB
AC adapter
Power
24V
switch
2-11