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Paper Feed System 5-41
Printing from the Optional 500-sheet
Universal Tray
The operation sequences of the Paper Feeder are controlled by the
Paper Feeder Driver. A 4-bit microprocessor is used in the Paper
Feeder Driver, which controls the sequences of the Paper Feeder and
the serial communication with the Engine Controller Board.
The Engine Controller Board outputs the pickup command to the
Paper Feeder Driver with the necessary timing.
The Paper Feeder Driver drives the solenoid in response to the
pickup command. The Paper Feeder Driver also returns the status of
the Paper Feeder to the Engine Controller Board.
+24VDC is supplied to the Paper Feeder from the printer, and +3.3V
for the integrated circuits is generated from +24VDC inside the Paper
Feeder Driver.
Figure 5-26 Paper Feeder Driver I/O