Canon multipass c3000 Service Manual (en)

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6. ELECTRIC CIRCUIT
6.1 Component Block Diagram
Chapter 2: Technical Reference
2-27
+5V
Data backup
RO
M
8M bit
(IC301)
SRAM
256K bit
(IC302)
Real-time
clock IC
(IC203)
System control section
NCU board
DRAM
4M bit
(IC303)
Communication
control section
Serial transmission
Operation panel unit
Modem IC
R144EFXL
(IC701)
Reset IC
(IC202)
Address Bus  A0 to A23
Document
edge sensor
System controller (1/3)
(IC401)
MPU
(IC201)
32 MHz
Address/Data Bus  AD0 to AD7
Driver IC
(IC 12)
Driver IC
(IC 6)
Sub-
heater
Carriage
motor
Home position
sensor
BJ head
Paper feed
motor
Printer
controller
(IC5)
System controller (2/3)
(IC401)
ROM
8M bit
(IC3)
Temperature
sensor
DRAM 4M bit
(IC4)
Data Bus D0 to D15
Cartridge detection
Bi-Centronics
interface
Printer control
 section
M
M
MPU
(PRINTER)
(IC1)
Power supply
unit
+12V
+24V
+5V
AC120V
Ink detect
sensor
Document sensor
20MHz
EEP ROM
(IC8)
Heater
driver
Heater
driver
Speaker
AMP.
Address Bus A0 to A23
Pulse
genration
circuit
Driver IC
(IC 302)
Document feed
motor
M
Regulator
(IC403)
DRAM
4M bit
(IC307)
Pickup roller
sensor
UHQ-6.5
function
SRAM
256K bit
(IC402)
Contact sensor
Document
scanning
section
System controller
 (3/3) (IC401)
Paper edge
 sensor
Figure 2-21 Block Diagram