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30 November 1990
11. OVERALL MACHINE CONTROL
Copier
Main PCB
RXD
TXD
The DF CPU monitors the input signals from the sensors and switches, and en-
ergizes the solenoids and the indicator LEDs directly. The belt drive motor and
the feed-out motor are controlled by the DF CPU through their respective driver
ICs.
Also, the DF CPU communicates with the main system using a serial interface (fi-
ber optics).
DF Main Board
TXD
CPU
RXD
ROM
7-6
Sensors
Switches
Solenoids
Indicators
Belt Drive
Driver
Motor
IC
Feed-out
Driver
Motor
IC
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