Duplex Unit Motor - Xerox Phaser 4500 Service Manual

General Troubleshooting

Duplex Unit Motor

4-50
Troubleshooting Procedure (continued)
Steps Actions and Questions
Check the LVPS harness assembly:
2
1. Disconnect P/J27 from the HVPS/engine
logic board.
2. Test each cable between J27 <=> J2750
for continuity.
Is each cable continuous?
3 Replace the duplex unit PWBA
(page 8-102).
Is the problem cleared after replacement?
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?
Check the LVPS harness assembly:
2
1. Disconnect P/J27 from the HVPS/engine
logic board.
2. Test each cable between J27 <=> J2750
for continuity.
Is each cable continuous?
Yes
Go to step 3.
Problem
solved.
Wiring and Plug/Jack Map References
"Duplex Unit Signal Diagram" on page 10-35
"Duplex Unit General Wiring Diagram" on
page 10-34
"P4500: 24 V Interlock, Rear Cover Switch,
Main Motor, Sub Fan, Exit Motor Assembly" on
page 10-21
"Duplex Unit Plug/Jack Locator" on page 10-14
Yes
Go to step 2.
Go to step 3.
Phaser 4500/4510 Service Manual
No
Replace the
LVPS harness
assembly.
Replace the
HVPS/engine
logic board
(page 8-73).
No
Replace the
duplex unit
assembly
harness.
Replace the
LVPS harness
assembly.