130 Phaser 5400 Laser Printer Service GuideRAP 48 Laser Assembly.Table 77 Laser Assembly Troubleshooting ProcedureStep Actions and Questions Yes No1 LASER SCANNER MOTOR1. Enter Diagnostics mode.2. From the Main Menu, select Component Test / ROSMotor / press [4] to start, [0] to stop.Do you hear the Laser Scanner motor spin up?Go toStep 5.Go toStep 2.2 ìNOî FROM STEP 1 ABOVE1. Switch printer power OFF.2. Remove the Left Side Cover [RRP 1.1, page 250].3. Switch printer power ON.4. Measure the voltage between P/J11-11 on the PrintEngine Controller Board and frame ground.Does the voltage between P/J11-11 and frameground measure +24.0 VDC?Go toStep 4.Go toStep 3.3 ìNOî FROM STEP 2 ABOVEMeasure the voltage between P/J16-9 on the PrintEngine Controller Board and frame ground.Does the voltage between P/J16-9 on the PrintEngine Controller Board and frame groundmeasure +24.0 VDC?Replace thePrint EngineControllerBoard[RRP 8.5,page 310].Replace theLVPS[RRP 8.6,page 312].4 ìYESî FROM STEP 2 ABOVE1. Enter Diagnostics mode.2. From the Main Menu, select Component Test / ROSMotor.3. Measure the voltage between P/J11-13 and frameground.4. Press [4] and observe the voltmeter.Does the voltage drop from +5.8 VDC to 0.6VDC?Replace theLaserAssembly[RRP 7.1,page 297].Replace thePrint EngineControllerBoard[RRP 8.5,page 310].5 ìYESî FROM STEP 1 ABOVE1. Switch printer power OFF.2. Remove the Left Side Cover [RRP 1.1, page 250].3. Remove the Print Engine Controller Board Cover[RRP 8.5, page 310].4. Switch printer power ON.5. Measure the voltage between P11-8 and frameground.Does the voltage between P11 and frame groundmeasure +5.0 VDC?Go toStep 13.Go toStep 6.6 ìNOî FROM STEP 6 ABOVEMeasure the voltage between P/J21-4 and frameground.Does the voltage between P/J21-4 and frameground measure +5.0 VDC?Go toStep 9.Go toStep 7.
