4-124.2.2.8 Frequent double feed and skewCause RelevantUnitCheckMethodMaintenance MethodPaper settingfailureOperationerrorIs the papercorrectly set inthe paperchute?Teach users to properlyposition the paperPaper failure OperationerrorIs thespecifiedpaper usedNonePad assemblyfailurePad assembly Check the padassembly forwear and tear.Replace the padassembly/ touch springunit.Ultrasonicfunction failureFunction fail Retry theultrasonicsetup orreplace theultrasonicreceiverboard.NoneTable 4.104.2.2.9 Strange sound generatedCause RelevantUnitCheck Method MaintenanceMethodPaper setting failure OperationerrorIs the papercorrectly set in theADF Input Tray?Teach users toproperlyposition thepaperpaper failure OperationerrorIs the specifiedpaper used?NoneMotor noise AssemblyerrorIs the motorcorrectly assembledon the metal plate?NoneTable 4.11