Phaser 4400 Laser Printer Service Manual 2-39Tray [#] 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 FullActuator.Does the message on the display alternatebetween ìFullî and ìNot Fullî as you lift andrelease the actuator (the indication may have ashort delay because of the sensor circuit)?ReplaceEngine LogicBoard (RRP9.3 onpage 6-89).Go to OutputTray FullSensor onpage 3-22.Low Paper Troubleshooting ProcedureStep Actions and Questions Yes No1 Fill the tray in the affected position.Does the message reappear?Go to step 2. Problemsolved.2 1. Remove the affected tray Assembly.2. Push up the Low Paper Actuator manually and thenrelease.The Low Paper Actuator moves smoothly.Go to step 3. Repair orreplace theLow PaperSensorAssembly(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 thenrelease.Does the message on the Front Panel displayalternate between ìLowî and ìNot Lowî as youpress the Low Paper Actuator?Replace theEngine LogicBoard (RRP9.3 onpage 6-89).Go to step 4.4 Check the wiring associated with the specific LowPaper Sensor.Is the wiring OK?Replace theLow PaperSensor(RRP 3.5,page 6-32/RRP 11.14,page 6-133)Replace thefaulty wiring.Output Tray Full Troubleshooting Procedure (cont'd.)Step Actions and Questions Yes No
