3-86 Phaser 7400 Color Printer Service ManualPaper Not Available Load Tray 1 (MPT) with [size] [type]Tray 1 (MPT) Paper Size mismatch error. The size setting stored in NVRAM differsfrom the size specified by the print job.Initial Actions:■ Check that the size setting in NVRAM, media loaded in the tray, andspecification for the job match.■ Cycle printer power.■ If the problem persists, follow the procedure below.Troubleshooting Reference TableApplicable Parts Wiring and Plug/Jack References■ Front Sensor Board, PL8.1.7■ Engine Control Board, PL1.1.4■ Print Engine Map 9 (page 10-12)■ Print Engine Front Sensor Board (2/2) (page 10-27)Troubleshooting Procedure TableStep Actions and Questions Yes No1 Check the following for evidence of fault,debris, damage, of misalignment:■ Feed-Out #1 Sensor Actuator■ Registration Sensor #1 Actuator■ MPTSNS HarnessReplace the partsconcerned.Go to Step 2.2 Check the MPTSNS Harness continuity.Is the harness conductive?Go to Step 3. Replace theharness.3 Check for +5 V to the sensor.Disconnect MPTSNS at the Front SensorBoard.Is there +5 V across MPTSNS-4 <=>ground?Replace the sensor(page 8-32).Go to Step 4.4 Check for +5 V to the Front Sensor Board.Disconnect FSNS at the Motor DriverBoard.Is there +5 V across FSNS-10 and -14<=>ground?Replace the FrontSensor Board(page 8-150).Go to Step 6.5 Check the FSNS Harness continuity.Is the harness conductive?Replace the MotorDriver Board(page 8-141).Replace the FSNSHarness.
