Envelope Feeder Control Components; Mechanical Drive - Lexmark W820 Service Manual

Envelope Feeder Control Components

Envelope Feeder Control is made up of four major components.
1.
2.
3.
4.

Mechanical Drive

Mechanical Drive is a term used to describe both the rotation of the Envelope Motor and
the action of the gears and rollers used to transmit motor rotation to the drive rolls within
the Envelope Feeder. The purpose of Mechanical Drive within the Envelope Feeder is to
provide the mechanical energy needed to drive an envelope from the Envelope Feeder
tray and into the printer base engine.
Drive for the Envelope Feeder
The Envelope PWB controls the Envelope Motor. The Motor rotates the Drive Gears.
When the Envelope PWB switches on the Envelope Motor, the Motor rotates the Drive
Gears. When the Envelope PWB actuates the Feed Clutch, the Clutch transmits drive to
the Envelope Feed and Transport Roll. The Friction Clutch transmits drive to the Retard
Roll.
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Service Manual
Envelope Feeder PWB
The Envelope Feeder PWB controls all Envelope Feeder functions, executes
commands sent by the MCU PWB, and sends information back to the MCU PWB.
No Paper Sensor
Monitors the envelope level in the Envelope tray.
Size Sensor
Monitors the envelope size loaded in the Envelope tray.
Feed Sensor
Monitors envelope travel out of the Envelope Feeder.
Monitors paper entering the Envelope Feeder from the printer.
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