Xerox 4400DT - Phaser B/W Laser Printer, Service Manual, Page: 76 / 503

Phaser 4400 Laser Printer Service Manual 2-39
Tray [#] Paper is Low.
Paper stack in the Paper Tray Assembly is below 50 ±30 sheets.
5 1. Enter Service Diagnostics and select Sensor Tests.
2. Scroll to Output Tray Full Sensor and press OK .
3. Manually actuate and deactuate the Output Tray Full
Actuator.
Does the message on the display alternate
between “Full” and “Not Full” as you lift and
release the actuator (the indication may have a
short delay because of the sensor circuit)?
Replace
Engine Logic
Board (RRP
9.3 on
page 6-89 ).
Go to Output
Tray Full
Sensor
on
page 3-22.
Low Paper Troubleshooting Procedure
Step Actions and Questions Yes No
1 Fill the tray in the affected position.
Does the message reappear?
Go to step 2. Problem
solved.
2 1. Remove the affected tray Assembly.
2. Push up the Low Paper Actuator manually and then
release.
The Low Paper Actuator moves smoothly.
Go to step 3. Repair or
replace the
Low Paper
Sensor
Assembly
(RRP 3.5,
page 6-32 /
RRP 11.14,
page 6-133 ).
3 1. Enter Service Diagnostics and select Sensor Tests.
2. Scroll to Tray [#] Low Paper Sensor and press OK .
3. Press the Low Paper Actuator manually and then
release.
Does the message on the Front Panel display
alternate between “Low” and “Not Low” as you
press the Low Paper Actuator?
Replace the
Engine Logic
Board (RRP
9.3 on
page 6-89 ).
Go to step 4.
4 Check the wiring associated with the specific Low
Paper Sensor.
Is the wiring OK?
Replace the
Low Paper
Sensor
(RRP 3.5,
page 6-32 /
RRP 11.14,
page 6-133 )
Replace the
faulty wiring.
Output Tray Full Troubleshooting Procedure (cont'd.)
Step Actions and Questions Yes No