Xerox Phaser 4510 - Page 206

4-52 Phaser 4500/4510 Service Manual
General Troubleshooting
2 Check the duplex unit sensor (1):
1.Enter Service Diagnostics, and from the
Sensor Tests menu select Duplex
Sensor test.
Does the sensor correctly report the
position of the actuator?
Replace the
HVPS/engine
logic board
(page 8-73).
Go to step 4.
3 Check the duplex unit sensor (2):
1.Open the duplex unit housing cover and
keep open.
2.Measure the voltage across P/J53-3 <=>
P/J53-2 while manually operating the
duplex unit actuator.
Does the voltage measure 0 VDC when the
actuator is pushed, and 3.3 VDC when
released?
Replace the
HVPS/engine
logic board
(page 8-73).
Go to step 4.
4 Replace the duplex unit sensor
(page 8-106).
Does the problem still occur after
replacement?
Go to step 5. Problem
solved.
5 Check the duplex unit sensor harness:
1.Remove the duplex unit sensor.
2.Disconnect P/J53 from the duplex unit
PWBA.
3.Test each cable between J53 <=> J530
for continuity.
Is each cable continuous?
Go to step 6. Replace the
duplex unit
sensor
harness.
6 Check the duplex unit harness:
1.Remove the duplex unit harness.
2.Test for continuity across J50 <=> J2750.
Is it continuous?
Go to step 7. Replace the
duplex unit
harness.
7 Check the LVPS harness assembly:
1.Remove the LVPS harness assembly.
2.Test for continuity across J27 <=> J2750.
Is it continuous?
Go to step 8. Replace the
LVPS harness
assembly.
8 Check the HVPS/engine logic board:
1.Disconnect P/J11 from the HVPS/engine
logic board.
2.Test for continuity across P11-16 <=>
P27-4.
Is it continuous?
Go to “LVPS
(Low Voltage
Power
Supply)” on
page 4-4.
Replace the
HVPS/engine
logic board
(page 8-73).
Troubleshooting Procedure (continued)
Steps Actions and Questions Yes No