Phaser 5400 Laser Printer Service Guide 1317 ìNOî FROM STEP 6 ABOVEMeasure the voltage between P/J21-3 and frameground.Does the voltage P/J21-3 and frame groundmeasure +5.0 VDC.Replace thePrint EngineControllerBoard[RRP 8.5,page 310].Go toStep 8.8 ìNOî FROM STEP 7 ABOVE1. Switch printer power OFF.2. Remove the Lower Rear Cover [RRP 1.7, page 256].3. Disconnect P/J16 from the Print Engine ControllerBoard.4. Measure the resistance between pin 5 of thedisconnected plug and P/J161-10 on the LVPS.Is there continuity between P16-5 andP/J161-10?Replace theLVPS[RRP 8.6,page 312].Replace thePrint EngineControllerHarness[PL 9.2,page 406].9 ìYESî FROM STEP 6 ABOVEMeasure the voltage between P/J21-3 and frameground.Does the voltage between P/J21-3 and frameground measure +5.0 VDC?Replace thePrint EngineControllerBoard[RRP 8.5,page 310].Go toStep 10.10 PRINT CARTRIDGE TAB1. Open the Top Cover and remove the Print Cartridge.2. Inspect the tab on the left side of the Print Cartridgethat actuates the Print Cartridge Switch.Is the tab on the Print Cartridge intact?Go toStep 11.Replace thePrintCartridge[PL 8.1,page 402].11 LASER SAFETY SWITCH ACTUATORPress and release the Laser Safety Switch Actuator.Does the Laser Safety Switch Actuator levermove smoothly?Go toStep 12.Replace theCRUM PWB[RRP 3.7,page 281].12 ìYESî FROM STEP 11 ABOVE1. Switch printer power OFF.2. Install the Print Cartridge.3. Leave the Top Cover open.4. Disconnect P/J21 from the Print Engine ControllerBoard.5. Check for continuity between J21-4 and J21-3 as youlift and lower the cartridge.Is there continuity between J21-4 and J21-3when you lower the cartridge and no continuitywhen you lift the cartridge?Replace thePrint EngineControllerBoard[RRP 8.5,page 310].Replace theCRUM PWB[RRP 3.7,page 281].13 ìYESî FROM STEP 5 ABOVE1. Run a test print while measuring the voltage betweenP/J11-5 and frame ground.2. Run a test print while measuring the voltage betweenP/J11-6 and frame ground.Does the voltage on both pins change from0.0 VDC to +1.1 VDC and back to 0.0 VDC?Go toStep 14.Replace thePrint EngineControllerBoard[RRP 8.5,page 310].Table 77 Laser Assembly Troubleshooting Procedure (cont'd.)Step Actions and Questions Yes No
