12.1.2.1.2. Outline of the Electrical Circuitry
The sequence of finisher operations is controlled by the Finisher Controller PCB. The Finisher Controller
PCB is a 16-bit microprocessor (CPU), and is also used for combination with the Host Machine (serial).
The Finisher Controller PCB Drive Motors, and other loads in response to the various commands from the
Host Machine. It also communicates such data as on the states of various sensors, and switches to the
Host Machine by way of the serial communication line.
The ICs mounted to the Finisher Controller PCB have the following functions:
• IC13 (CPU)
Controls sequence of operations.
• IC12 (EEP-ROM)
Backs up adjustment settings.
• IC6 (EP-ROM)
Stores sequence programs.
• IC11 (communication IC)
Communicates with the host machine.
• IC1 (regulator IC)
Generates 5 V.
Fig. 2-001 shows the flow of signals between finisher, and options controller.
Ver. 1.1
Finisher Unit
Finisher
Controller
PCB
Motor
IC13
CPU
Clutch
IC12
Switch
EEP-ROM
Sensor
IC11
Communication
Punch Unit (Option)
IC
IC6
Punch Controller
EP-ROM
PCB
IC1
Regulator IC
Motor
Fig. 2-002
762
Host Machine DC
Controller PCB
PCU
Sensor
DP-C405/C305/C265
FEB 2008