Xerox Phaser 4500

General Troubleshooting 4-29
Interlock Switch Assembly
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Interlock Switch Assembly
■ LVPS
■ HVPS/Engine Logic Board
■ “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 Interlock Switch Assembly
1. Disconnect P/J411.
2. Test for continuity across points
P/J411-1 <=> P/J411-3 while manually
operating the switch.
Is the switch continuous when pushed
and open when released?
Go to step 2. Replace the
Interlock Switch
Assembly
(page 8-13).
2
Check the LVPS Harness Assembly:
1. Disconnect P/J11, P/J41, and P/J411.
2. Test for continuity across the following
points:
■ P411-3 <=> J41-5
■ P411-1 <=> J11-12
Are both continuous?
Go to “LVPS (Low
Voltage Power
Supply)” on
page 4-4.
Replace the
LVPS Harness
Assembly.