Envelope Feeder Control - Lexmark W820 Service Manual

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Envelope Feeder Control

Envelope Feeder Control is a broad term used to describe the printer resources that
monitor and control the actions and operations of the printer and the Envelope Feeder;
from envelope feed to Envelope Feeder error detection.
The center of Envelope Feeder control is the Envelope PWB. The MCU PWB provides
the logic and information processing necessary for the printer to function, and the
Envelope PWB provides the logic and information processing necessary for the Envelope
Feeder to function. Every electrical component within the Envelope Feeder is connected
to the Envelope PWB. Sensors in the Envelope Feeder send status information to the
Envelope PWB. The Envelope PWB processes that information and shares it with the
MCU PWB. Acting on the results of the processing, the Envelope PWB sends commands
to the various Envelope Feeder components; switching off the motor or switching on the
Feed Clutch.
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