Duplex Unit Motor - Xerox Phaser 4500 Service Manual

Duplex Unit Motor

Troubleshooting Reference
Applicable Parts
Duplex Unit Motor
Duplex Unit PWBA
Duplex Unit Assembly Harness
HVPS/Engine Logic Board
LVPS
LVPS Harness Assembly
Troubleshooting Procedure
Steps Actions and Questions
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?
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?
3 Check the Duplex Unit Motor for rotation:
1. Enter Service Diagnostics, and from the
Motors/Fan Test
Motor High
tests.
Does the motor rotate?
4
Replace the Duplex Unit Motor.
Is the problem cleared after replacing
the Duplex Unit Motor?
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?
General Troubleshooting
Wiring and Plug/Jack Map References
"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
menu select Duplex
and Duplex Motor Low
Yes
Go to step 2.
Go to step 3.
Replace the
HVPS/Engine
Logic Board
(page 8-89).
Problem solved.
Go to "Duplex Unit
PWBA" on
page 4-54.
No
Replace the
Duplex Unit
Assembly
Harness.
Replace the
LVPS Harness
Assembly.
Go to step 4.
Go to step 5.
Go to step 6.
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