Outline Of Electrical Circuitry - Canon FINISHER-C1 Service Manual

CHAPTER 2 FINISHER UNIT BASIC OPERATION
B.

Outline of Electrical Circuitry

The finisher's sequence of operations is controlled by the finisher controller PCB. The finisher
controller PCB is a 16-bit microprocessor (CPU), and is used for communication with the host
copier (serial) in addition to controlling the finisher's sequence of operations.
The finisher controller PCB responds to the various commands coming from the host copier
through a serial communications line to drive solenoids, motors, and other loads. In addition, it
communicates the finisher's various states (information on sensors and switches) to the host copier
through a serial communications circuit.
In the case of the Saddle Finisher-C2, the finisher controller PCB not only communicates with
the saddle stitcher controller PCB but also communicates the saddle stitcher unit's various states
(information on sensors and switches) to the host copier.
The ICs used on the finisher controller PCB are designed for the following:
Q1 (CPU)
Controls sequence of operations.
Q2 (EP-ROM)
Contains sequence programs.
Q3 (RAM)
Backs up initial settings data.
Q4 (communications IC)
Communicates with the host copier and the saddle stitcher unit.
Q9 (regulator IC)
Generates 5 V.
Figure 2-102 shows the flow of signals between the finisher and the options controller.
Saddle stitcher controller
PCB (Saddle Finisher-C2)
Copier
(DC controller PCB CPU)
2-2
Figure 2-102
COPYRIGHT © 1998 CANON INC. FINISHER-C1/SADDLE FINISHER-C2 REV. 0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Finisher
controller
PCB
Q1
CPU
Q2
EP-ROM
Q3
RAM
Q4
Communications IC
Q9
Regulator IC
Motor
Solenoid
Switch
Sensor