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5-44 Functional Information
Envelope Feeder
The operation sequences of the Envelope Feeder are controlled by
the Envelope Feeder Driver. A 4-bit microprocessor is used in the
Envelope Feeder Driver, which controls the sequences of the
Envelope Feeder and the serial communication with the Engine
Controller Board of the printer.
The Engine Controller Board outputs the pickup command to the
Paper Feeder Driver with the necessary timing.
The Envelope Feeder Driver drives the solenoid in response to the
command. The Envelope Feeder Driver also returns the Envelope
Feeder status to the Engine Controller Board.
+24VDC is supplied to the Envelope Feeder from the printer, and
+3.3V for the ICs is generated from the +24VDC inside the Paper
Feeder Driver.
Pickup and Feeding
The Envelope Feeder picks up the envelope from the Envelope
Feeder and feeds it to the printer. The envelope path is shown below.
Figure 5-29 Envelope Feed
The Envelope Feeder is driven by the Main Motor (M101) of the
printer.
When the /PRNT signal is sent to the printer from the Formatter, the
printer starts the initial rotation phase. (This phase consists of Main
Motor start-up, Scanner Motor start-up, High-voltage Control
Sequence, and Fusing unit start-up.) When the initial rotation phase