Electrical Circuitry; Outline; Cpu Pcb; Control Panel - Canon CLC 1120 Service Manual

CHAPTER 2 BASIC OPERATION
B. Electrical Circuitry

1. Outline

The copier's major electrical functions are controlled by the CPU on the CPU PCB. Table 2-
101 shows the functional assignment of the CPU and the functions of the DIMMs and the RAMs.

2. CPU PCB

The CPU PCB is equipped with three CPUs, and this manual refers to these three as PANEL-
CPU, R-CPU, and DC-CPU with reference to their functions.
Name
PANEL-CPU
Flash memory (DIMM)
RAM
R-CPU
Flash memory (DIMM)
RAM
DC-CPU
Flash memory (DIMM)
RAM

3. Control Panel

Name
CPU
2-2
COPYRIGHT © 1999 CANON INC.
· Controls the control panel, controls service mode, controls
control panel controller communication.
· Contains control programs.
· Stores control data.
· Controls the scanning lamp, controls the scanner motor,
controls job management, controls scanner (reading).
· Controls image processing, controls fans, controls IPC
(RDF, film projector, CC-X).
· Controls the editor, controls bi-Centronics communication,
controls serial communication.
· Contains control programs.
· Stores control data.
· Controls fixing temperature, controls power supply to loads,
controls high voltage, controls potential, controls toner
supply.
· Controls paper feeding, controls output management,
controls motors, controls sensors.
· Controls solenoids, controls clutches, controls fans, detects
paper in cassettes.
· Detects original size, controls the paper deck, controls IPC
(sorter).
Contains control programs.
Store control data.
Table 2-101
· Monitors key input, controls buzzer volume, controls LCD
activation.
Table 2-102
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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