Xerox Phaser 4500 Service Manual

4-58 Phaser 4500 Service Manual
Duplex Unit Switch
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Duplex Unit Switch
■ LVPS Harness Assembly
■ Duplex Unit Cover Assembly
Harness
■ Duplex Unit PWBA
■ Duplex Unit Assembly Harness
■ HVPS/Engine Logic Board
■ LVPS
■ “Duplex Unit Signal Diagram” on page 10-30
■ “Duplex Unit General Wiring Diagram” on
page 10-29
■ “24 V Interlock, Rear Cover Switch, Main Motor, Sub
Fan, Exit Motor Assembly” on page 10-18
■ “Duplex Unit Plug/Jack Locator” on page 10-12
Troubleshooting Procedure
Steps Actions and Questions Yes No
1
Check the Duplex Unit Switch:
1. Remove the Duplex Unit Switch.
2. Test for continuity across J520-2 <=>
J520-1 while pushing and releasing the
Duplex Switch.
Is the switch continuous when pushed,
and open when released?
Go to step 2. Replace the
Duplex Unit
Switch
(page 8-131).
2
Check the Duplex Unit Cover Harness:
1. Remove the Duplex Unit Cover Harness.
2. Test J52 <=> J520 for continuity.
Is the harness continuous?
Go to step 3. Replace the
Duplex Unit
Cover Assembly
Harness.
3
Check the Duplex Unit Harness:
1. Remove the Duplex Unit Harness.
2. Test J50 <=> J2750 for continuity.
Is the harness continuous?
Go to step 4. Replace the
Duplex Unit
Assembly
Harness.
4
Check the LVPS Harness Assembly:
1. Remove the LVPS Harness Assembly.
2. Test J27 <=> J2750 for continuity.
Is the harness continuous?
Go to step 5. Replace the
LVPS Harness
Assembly.
5
Check the 3.3 V line to the Duplex Unit:
1. Remove the Print Cartridge.
2. Measure the voltage across P/J27-4 <=>
P/J27-3 on the HVPS/Engine Logic
Board.
Does the voltage measure 3.3 VDC?
Go to “Duplex Unit
PWBA” on
page 4-54.
Go to step 6.

Xerox Phaser 4500 Specifications

General

Brand	Xerox
Model	Phaser 4500
Category	Printer
Language	English