Envelope Feeder Power And Control; Envelope Feeder Drive Generation And Distribution; Envelope Feeder Power - Lexmark W820 Service Manual

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Envelope Feeder Power and Control

All active components within the Envelope Feeder are electrically connected to the
Envelope PWB. The Base Engine Low Voltage Power Supply supplies +5VDC and
+24VDC to the I/O PWB, and the I/O PWB supplies +5VDC and +24VDC to the Envelope
PWB. The MCU PWB provides most of the Envelope Feeder logic, while the Envelope
PWB executes the MCU commands.

Envelope Feeder Drive Generation and Distribution

The printer Envelope Feeder has one +24VDC motor, the Envelope Motor, that supplies
drive to the entire Envelope Feeder. A Gear Assembly and Feed Clutch controls and
transfers motor drive to Envelope Feeder components.

Envelope Feeder Power

The Envelope PWB, located inside the Envelope Feeder, plugs into the I/O PWB. The
Base Engine LVPS supplies +5VDC and +24VDC to the I/O PWB. The I/O PWB then
supplies +5VDC and +24VDC to the Envelope PWB. The +5VDC powers the Envelope
PWB and the Envelope Feeder Sensors, the +24VDC powers the Envelope Motor and
the Feed Clutch.
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Service Manual