Printing from the 1,500-sheet feeder
The paper-feeder driver controls the 1,500-sheet feeder operation sequences. An 8-bit
microprocessor in the paper-feeder driver controls the 1,500-sheet feeder sequences and the
communication with the dc controller PCA.
The paper-feeder driver drives the solenoid in response to the pickup command. The paper-feeder
driver also reports the paper-feeder status to the dc controller PCA.
The printer delivers a charge of +24 Vdc to the 1,500-sheet feeder, which then generates +3.3 V for
the integrated circuits.
Figure 5-12 1,500-sheet feeder I/O block diagram
128 5 Theory of operation
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