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

4025 Options

High Capacity Feeder Power and Control

All active components within the High Capacity Feeder are electrically connected to the
HCF 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 HCF PWB. The MCU
PWB provides most of the High Capacity Feeder logic, while the HCF PWB executes the
MCU commands.

High Capacity Feeder Drive Generation and Distribution

The High Capacity Feeder has one +24VDC motor, the HCF Motor, that supplies drive to
the entire High Capacity Feeder. A succession of gear assemblies and feed clutches
control and transfers motor drive to High Capacity Feeder components. The HCF also
contains three tray Lift Motors that raise each HCF Tray bottom plate so the paper stack
contains the Feed Rolls.

High Capacity Feeder Power

The HCF PWB, located inside the High Capacity 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 HCF PWB. The +5VDC powers the HCF PWB and
the High Capacity Feeder Sensors. The +24VDC powers the HCF Feed Motor, the Lift
Motors, and the Feed Clutches.
1-42
Service Manual