Xerox Phaser 4500, Service Manual

Page: 178 / 537

General Troubleshooting 4-25
Output Tray Stack Full Sensor
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■
Stack Full Sensor
■
Stack Full Actuator
■
Exit Sensor Assembly Harness
■
HVPS/Engine Logic Board
■
“Paper Exit” on page 10-25
■
“Fuser Assembly, Power Switch” on page 10-20
■
“Print Engine General Wiring Diagram” on
page 10-17
■
“Print Engine Plug/Jack Locator” on page 10-3
Troubleshooting Procedure
Steps Actions and Questions Yes No
1 Check the Stack Full Actuator:
1. Open the Paper Exit Assembly Cover.
2. Manually operate the Stack Full
Actuator.
Does the Stack Full Actuator operate
smoothly?
Does the flag move between the sensor
arms when there is no paper, and out of
the sensor arms when paper is present?
Go to step 2. Replace the
Stack Full
Actuator
(“Stack Full
Sensor” on
page 8-65).
2 Check the Stack Full Sensor (1):
1. Enter Service Diagnostics, and from the
Sensor Tests menu select Output Tray
Full Sensor .
2. Manually raise and lower the Stack Full
Sensor Actuator.
Does the sensor correctly report the
position of the sensor actuator?
Replace the
HVPS/Engine
Logic Board
(page 8-89).
Go to step 3.
3 Check the Exit Sensor Assembly Harness:
1. Remove the Paper Exit Assembly
(page 8-61)
2. Remove Exit Sensor Assembly Harness.
3. Check the following for continuity:
■
J29-1 <=> J290-3
■
J29-2 <=> J290-2
■
J29-3 <=> J290-1
Are all continuous?
Go to step 4. Replace the Exit
Sensor Harness.
4 Replace the Stack Full Sensor (page 8-65).
Is the problem cleared? Problem solved. Replace the
HVPS/Engine
Logic Board
(page 8-89).