Autoconnect System, Paper Tray Options, Envelope Feeder - Lexmark T520 - 20ppm 8MB Par USB Pcl6 Ps3 Ppds Service Manual

4520-xxx
Autoconnect System, Paper Tray Options,
Envelope Feeder
Electrical
Autoconnect Cabling and Connectors
The printer options make electrical connection automatically,
requiring no external cables when the option is mechanically
installed under the printer. Communication between the option and
the base printer stops when you remove an option. The printer no
longer recognizes the option and deletes associated messages.
Each installed option below the base printer provides an electrical
autoconnect to the option attached below it. We do not recommend
to attach or "Hot Plug" any options with the base printer power
turned on.
Duplex Unit
The duplex unit interface is a six pin autoconnector that provides a
+24 V dc, +24 V dc return, serial interface transmit signal, serial
interface receive signal and two ground pins. The duplex unit
receives the +24 V dc from the base printer for the duplex motors
and also converts the voltage to +5 V dc for duplex electronics.
Duplex chassis grounding is provided from the printer to the duplex
unit through a ground spring attached to the frame and base of the
printer. The ground connection is automatically made when the
option is installed below the printer.
The paper input sensor is located in the rear of the duplex unit under
the input paper guide. The paper exit sensor is located on the left
frame assembly.
Option Microcode
The options are "Smart Options" or options that have a system
board. The option system board has a microprocessor that controls
the option mechanism. A software architecture is provided that
controls the option and communicates information such as paper
path status, sensor status, motor status and so on to the base
printer.
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Service Manual