Duplex Unit Sensor - Xerox Phaser 4500 Service Manual

Duplex Unit Sensor

Phaser 4500/4510 Service Manual
Troubleshooting Procedure (continued)
Steps Actions and Questions
Check the duplex unit motor for rotation:
3
1. Enter Service Diagnostics, and from the
Motors/Fan Test
and
Motor High
tests.
Does the motor rotate?
Replace the duplex unit motor.
4
Is the problem cleared after replacing the
duplex unit motor?
Check the power to the duplex unit motor:
5
Measure the voltage across P/J27-8 <=> P/
J27-7 on the HVPS/engine logic board.
Is the voltage +24 VDC?
Check the HVPS/engine logic board:
6
1. Disconnect P/J10 from the HVPS/engine
logic board.
2. Test for continuity across P10-1 <=>
P27-8.
Is it continuous?
Troubleshooting Reference
Applicable Parts
Duplex unit sensor
Duplex unit actuator
Duplex unit sensor harness
Duplex Unit PWBA
Duplex Unit assembly harness
HVPS/engine logic board
LVPS
LVPS harness assembly
Troubleshooting Procedure
Steps Actions and Questions
Check the duplex unit actuator:
1
Does the duplex unit actuator operate
smoothly?
Does the flag move between the sensor
arms when there is no paper in the duplex
unit, and out of the sensor arms when the
paper is present?
Yes
Replace the
HVPS/engine
logic board
menu select Duplex
(page 8-73).
Duplex Motor Low
Problem
solved.
Go to "Duplex
Unit PWBA"
on page 4-49.
Go to "LVPS
(Low Voltage
Power
Supply)" on
page 4-4.
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.
General Troubleshooting
No
Go to step 4.
Go to step 5.
Go to step 6.
Replace the
HVPS/engine
logic board
(page 8-73).
No
Replace the
duplex unit
actuator.
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