Xerox Phaser 4500

3-56 Phaser 4500 Service Manual
Close Top Cover/Close Rear Cover
Error Indication
Close Top Cover
Close Rear Cover
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Top Cover Switch
■ 5 V Interlock
■ Rear Cover Switch
■ Interlock Switch Assembly
■ Top Cover
■ HVPS/Engine Logic Board
■ LVPS
■ “24 V Interlock, Rear Cover Switch, Main Motor, Sub
Fan, Exit Motor Assembly” on page 10-18
■ “Laser Unit, 5 V Interlock, Interlock Switch
Assembly” on page 10-24
■ “Print Engine General Wiring Diagram” on
page 10-17
■ “Print Engine Plug/Jack Locator” on page 10-3
Troubleshooting Procedure
Steps Actions and Questions Yes No
1
Check the Top and Rear Covers:
1. Open both the Top and Rear Covers.
2. Inspect the tabs that actuate the
interlock switches on both sides of the
Top Cover and the left side of the Rear
Cover.
Are the tabs damaged?
Replace Top
Cover or Rear
Cover.
Close both covers
and go to step 2.
2
Check Top Cover Switch:
Enter Service Diagnostics, and from the
Sensor Tests menu select the Top Cover
Switch test.
Is the position of the Top Cover
accurately reported when the Top Cover
is opened and closed?
Go to step 3. Go to and
complete the
following:
■ “24 V Interlock”
on page 4-26
■ “5 V Interlock,
Interlock Switch
Assembly” on
page 4-26
■ “Interlock
Switch Assembly”
on page 4-29
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 8-89)
Go to and
complete the
following:
■ “24 V Interlock”
on page 4-26.
■ “Rear Cover
Switch” on
page 4-28.