Xerox Phaser 4500 Service Manual

General Troubleshooting 4-55
Duplex Unit Motor
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Duplex Unit Motor
■ Duplex Unit PWBA
■ Duplex Unit Assembly Harness
■ HVPS/Engine Logic Board
■ LVPS
■ LVPS Harness Assembly
■ “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 Assembly Harness:
1. Remove the Duplex Unit.
2. Disconnect P/J50 from the Duplex Unit
PWBA.
3. Test each cable between J2750 <=> J50
for continuity.
Is each cable continuous?
Go to step 2. Replace the
Duplex Unit
Assembly
Harness.
2
Check the LVPS Harness Assembly:
1. Disconnect P/J27 from the HVPS/
Engine Logic Board.
2. Test each cable between J27 <=> J2750
for continuity.
Is each cable continuous?
Go to step 3. Replace the
LVPS Harness
Assembly.
3
Check the Duplex Unit Motor for rotation:
1. Enter Service Diagnostics, and from the
Motors/Fan Test menu select Duplex
Motor High and Duplex Motor Low
tests.
Does the motor rotate?
Replace the
HVPS/Engine
Logic Board
(page 8-89).
Go to step 4.
4
Replace the Duplex Unit Motor.
Is the problem cleared after replacing
the Duplex Unit Motor?
Problem solved. Go to step 5.
5
Check the power to the Duplex Unit Motor:
Measure the voltage across P/J27-8 <=>
P/J27-7 on the HVPS/Engine Logic Board.
Is the voltage +24 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