Xerox Phaser 7400

Error Messages and Codes 3-177
Warning Messages
No Paper in Tray 1 (MPT)
The Tray 1 (MPT) No Paper Sensor indicates the tray is empty.
Initial Actions:
■ Cycle the printer's power.
■ If the problem persists follow the procedure below.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ No Paper Sensor, PL4.2.89
■ No Paper Actuator, PL4.2.65
■ Print Engine Map 9 (page 10-12)
■ Print Engine Front Sensor Board (1/2) page 10-26
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Fill the tray.
Does the error occur even if the tray is full?
Go to Step 2. Complete
2
Check the following for evidence of fault or
damage:
■ No Paper Sensor
■ No Paper Actuator
Is there any damage?
Replace any
damaged parts.
Go to Step 3.
3
Test the Tray 1 (MPT) No Paper Sensor.
Run the Service Diagnostics No Paper
Sensor test.
Does the sensor function correctly?
Replace the Engine
Control Board
(
page 8-112).
Go to Step 4.
4
Check the No Paper Sensor signal.
Does the voltage level change across
MPTPAP-2 when the sensor is actuated?
Go to Step 5. Replace the No
Paper Sensor.
5
Check all pins on the FSNS Harness for
continuity.
Is the harness conductive?
Replace the Engine
Control Board
(
page 8-112).
Replace the FSNS
Harness.