5-85.2.3 IMAGE UNCLEARCause RelevantUnitCheckMethodMaintenance MethodLamp toodark Lamp Visual check Replace the lampDirt onflatbed glass FlatbedglassVisual checkClean theflatbed glass with isopropylalcoholPrinter tonerlow Printer toner Visual check Check printer toner orreplace the tonerPrintermemory notenoughPrinter Visual checkAdd printer memoryTable 5.35.2.4 NOISE GENERATEDCause RelevantUnitCheckMethodMaintenance MethodMotor unitfailureMotor unit Replace themotor unitReplace the motorMain controlPCB failureMain controlPCBReplace themain controlPCBReplace the main controlPCBOpticalchassisfailureOpticalchassisCheck opticalchassisshakinessReplace the opticalchassisDirt on rail None Visual check Clean the railwith oilTable 5.4