Overview Of The Electrical Circuitry - Canon Finisher-T1 Service Manual

Chapter 2

2.1.2 Overview of the Electrical Circuitry

The finisher's sequence of operation 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
machine (serial) in addition to controlling the finisher's sequence of operations.
The finisher controller PCB responds to the various commands coming from the host machine
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
machine through a serial communications circuit.
The ICs used on the finisher controller PCB are designed for the following:
<IC108 (CPU)>
Controls sequence of operations.
Contains sequence programs.
<IC105 (EEP-ROM)>
Backs up adjustment values.
Backs up initial setting data.
<IC107 (communications IC)>
Communicates with the host machine and the saddle stitcher unit.
<IC102 (regulator IC)>
Generates 5V.
<IC109 (regulator IC)>
Generates 3.3V.
The following figure shows the flow of signals between the finisher and the options controller.
Punch controller PCB
(Puncher unit (option))
Host machine
(DC controller PCB CPU)
2-2
Finisher controller
PCB
IC108
CPU
IC105
EEP-ROM
IC107
Communications IC
IC102
Regulator IC
IC109
Regulator IC
F-2-2
0009-2509
Motor
Solenoid
Switch
Sensor