Phaser 4500/4510 Service Manual 3-59
Error Messages and Codes
Close Duplex Unit Cover
3 Check the rear cover switch
Enter Service Diagnostics, and from
the Sensor Tests menu select the
Rear Cover Switch test.
Is the position of the rear cover
accurately reported when the rear
cover is opened and closed?
Replace the
HVPS/engine
logic board.
(page 8-73)
Go to and
complete the
following:
■ “24 V
Interlock” on
page 4-24.
■ “Rear Cover
Switch” on
page 4-26.
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 10-35
■ “Duplex Unit General Wiring Diagram” on
page 10-34
■ “Duplex Unit Plug/Jack Locator” on page 10-14
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 8-100).
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 8-73).
Go to “Duplex
Unit Switch” on
page 4-53.
Troubleshooting Procedure (continued)
Steps Actions and Questions Yes No
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General
Weight and Dimensions
