Q2431-90912 Chapter 5 Theory of operation 95
Envelope feeder
The envelope-feeder driver controls the operation sequences of the envelope feeder. An 8-bit
microprocessor in the envelope feeder driver controls the envelope-feeder sequence and the
communication with the DC controller PCA.
The DC controller PCA sends the pickup command to the envelope-feeder driver with the
necessary timing. The envelope-feeder driver activates the solenoid in response to the
command.
The printer delivers a charge of +24 vdc to the envelope feeder, which then generates +5 v for
the integrated circuits.
Figure 27. Envelope feeder I/O block diagram
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