Xerox Phaser 4500

Error Messages and Codes 3-57
Close Duplex Unit Cover
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ HVPS/Engine Logic Board
■ LVPS
■ Duplex Unit Lower Housing
■ Duplex Unit Housing Cover
■ Duplex Unit Switch
■ Duplex Unit PWBA
■ “Duplex Unit Signal Diagram” on page 10-30
■ “Duplex Unit General Wiring Diagram” on
page 10-29
■ “Duplex Unit Plug/Jack Locator” on page 10-12
Troubleshooting Procedure
Steps Actions and Questions Yes No
1 Open the Duplex Unit Housing Cover.
Is the tab on the Duplex Unit Lower
Housing that actuates the cover
interlock switch damaged?
Replace the
Duplex Unit Lower
Housing
(page 8-121).
Go to step 2.
2 Enter Service Diagnostics, and from the
Sensor Tests menu select the Duplex
Cover Switch test.
Is the position correctly reported when
the Duplex Unit Cover is opened and
closed?
Replace the
HVPS/Engine
Logic Board
(page 8-89).
Go to “Duplex
Unit Switch” on
page 4-58.