3-78 Phaser 6250 Color Laser Printer Service ManualFuser Firmware FailureCode 76: The CRUM firmware has failed.WarningTo avoid the potential of electric shock, ensure the power to the printer is offand the power cord is disconnected from the wall outlet prior to performingStep 2 of the following troubleshooting procedure..9 Check J71 <=> J140 on the EEPROMHarness Assembly for continuity.Use the wiring diagram “Fuser Assembly”on page 10-21.Replace the EngineControl Board,page 8-107.Replace theEEPROMHarnessAssembly,PL 13.1.10.Troubleshooting Reference TableApplicable Parts Wiring and Plug/Jack Map ReferencesEEPROM Board, PL 10.1.14 “Fuser Assembly” on page 10-21FSR 4 Harness Assembly, PL 5.1.9 “Laser Unit” on page 10-22Troubleshooting Procedure TableStep Actions and Questions Yes No1 Check the Fuser Assembly for evidenceof fault or damage.Replace the partsconcerned.Go to Step 2.2 Remove the Fuser Assembly and checkfor broken or bent pins.Replace the partsconcerned.Go to Step 3.3 Does the error recur after the FuserAssembly has been replaced with a newone?Go to Step 4. Complete4 Are P/J 144 and P/J 145 on the EEPROMboard properly seated and defect free?Go to Step 5. Replace theEEPROM boardpage 8-86.5 Check continuity of Harness Assembly(FSR4) between J145 <=> J232. Refer tothe wiring diagram “Fuser Assembly” onpage 10-21.Go to Step 6. Replace theAssembly,Harness (FSR4)PL 5.1.9.Troubleshooting Procedure TableSteps Actions and Questions Yes No
