Xerox Phaser 4500 Service Manual

Error Messages and Codes 3-71
No Recognition of Duplex Unit
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ HVPS/Engine Logic Board
■ LVPS Harness Assembly
■ Duplex Unit PWBA
■ Duplex Unit Assembly Harness
■ “Duplex Unit Signal Diagram” on page 10-30
■ “Duplex Unit General Wiring Diagram” on
page 10-29
■ “Duplex Unit Plug/Jack Locator” on page 10-12
Troubleshooting Procedure
Steps Actions and Questions Yes No
1
Check the Duplex Unit detection signal:
1. Remove the Duplex Unit PWBA
(page 8-123).
2. Remove the Duplex Unit Assembly
Harness (page 8-121).
3. Connect J2750 of the Duplex Unit
Assembly Harness to P2750 of the
LVPS Harness Assembly.
4. Measure the voltage across P2750-5
and J2750-6.
Does the voltage measure +3.3 VDC?
Go to step 4. Go to step 2.
2
Check the Duplex Unit detection signal (2):
Measure the voltage across P/J27-4 and
P/J27-3 on the HVPS/Engine Logic Board.
Does the voltage measure +3.3 VDC?
Go to step 3. Replace the
HVPS/Engine
Logic Board
(page 8-89).
3
Check the LVPS Harness Assembly:
1. Remove the Duplex Unit Assembly
Harness (page 8-121).
2. Check the following for continuity:
■ J27-4 <=> J2750-5
■ J27-3 <=> J2750-6
■ J27-2 <=> J2750-7
■ J27-1 <=> J2750-8
Is each continuous?
Go to step 4. Replace the
LVPS Harness
Assembly.

Xerox Phaser 4500 Specifications

General

Brand	Xerox
Model	Phaser 4500
Category	Printer
Language	English