3-74 Phaser 7400 Color Printer Service Manual
Out of Paper Load Tray 1(MPT) with [size] [type]
The Tray 1 (MPT) No Paper Sensor indicates the tray is empty.
Initial Actions:
■ Inspect the tray to ensure that it is free of obstructions, is loaded with
supported media, and the guides are adjusted correctly.
■ Cycle printer power.
■ If the problem persists, follow the procedure below
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ No Paper Sensor, PL10.1.32
■ No Paper Sensor Actuator, PL10.1.79
■ MPTPAP Harness, PL10.1.33
■ Print Engine Map 9 (page 10-12)
■ Print Engine Map 10 (page 10-13)
■ Print Engine Front Sensor Board (1/2) (page 10-26)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Check the following for evidence of fault or
damage:
■ Tray 1 (MPT) No Paper Sensor,
PL5.3.14
■ Sensor Actuator, PL5.3.15
Is there any damage?
Replace any
damaged parts.
Go to Step 2.
2
Test the Tray 1 (MPT) No Paper Sensor.
Run the Service Diagnostics Tray 1 (MPT)
Switches No Paper Sensor test.
Does the sensor function correctly?
Replace the
Engine Control
Board
(
page 8-112).
Go to Step 3.
3
Check for +5 V to the Tray 1 (MPT) No
Paper Sensor.
Is there +5 V across MPTPAP-1 <=>
ground?
Replace the sensor
(
page 8-33).
Replace the Front
Sensor Board
(
page 8-150).
4
Check all pins of the FSNS harness for
continuity.
Disconnect the FSNS Harness.
Is the harness conductive?
Replace the Motor
Driver Board
(
page 8-141). If the
error persists, go to
Step 5.
Replace the
FNSNS Harness.
5
Check all pins of the DRV0 harness for
continuity.
Disconnect the DRV0 ribbon cable.
Is the cable conductive?
Replace the
Engine Control
Board
(
page 8-112).
Replace the DRV0
Harness.
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