168 Phaser 5400 Laser Printer Service GuideRAP 66 Pre-Registration Sensor.Table 96 Pre-Registration Sensor Troubleshooting ProcedureStep Actions and Questions Yes No1 PRE-REGISTRATION SENSOR ACTUATOR1. Open the 500-Sheet Feeder Rear Cover.2. Manually actuate and deactuate the Pre-RegistrationSensor Actuator.Does the Pre-Registration Sensor Actuator movesmoothly?Go toStep 2.Replace thePre-RegistrationSensorActuator[RRP 11.21,page 351].2 PRE-REGISTRATION SENSOR1. Enter Diagnostics mode.2. From the Main Menu, select Component Test / SensorInput / press [4] to start, [0] to stop.3. Press and release the Pre-Registration SensorActuator.Does the LCD counter increment each time youpress and release the actuator?Replace thePrint EngineControllerBoard[RRP 8.5,page 310].Go toStep 3.3 P133-7 and P133-9 VOLTAGE MEASUREMENT1. Switch printer power OFF.2. Remove the 500-Sheet Feeder Left Cover [RRP 11.3,page 330].3. Disconnect P/J133 from the Feeder Board.4. Switch printer power ON.5. Measure the voltage between P133-7 and frameground, the between P133-9 and frame ground.Do both voltages measure +3.2 VDC?Go toStep 4.Replace theFeederBoard[RRP 11-7,page 334].4 ìYESî FROM STEP 4 ABOVE1. Switch printer power OFF.2. Reconnect P/J133.3. Switch printer power ON.4. Measure the voltage between P/J133-9 and frameground as you actuate and deactuate thePre-Registration Sensor Actuator.Does the voltage measure +3.2 VDC whendeactuated and 0.0 VDC when actuated?Go toStep 5.Check forcontinuitybetweenP/J133 andP/J13P, thenbetweenP/J13P andP/J13C.Repair orreplace asnecessary. Ifharnesschecks OK,replace thePre-Regis-trationSensor[RRP 11.21,page 351].5 ìYESî FROM STEP 4 ABOVEWith Paper in the tray and the tray inserted into the500-Sheet Feeder, measure the voltage betweenP/J132-7 and frame ground as you actuate anddeactuate the Pre-Registration Sensor.Does the voltage measure +2.76 VDC whendeactuated and +3.2 VDC when actuated?Go toStep 6.Replace theFeederBoard[RRP 11-7,page 334].
