Chapter 5Troubleshooting Self Diagnostic Codes5.1 Self Diagnostic Error CodesSelf Diagnostic Error Codes (Printer)Self Diagnostic Error Codes (Scanner/ADF)Self Diagnostic Error Codes (Finisher)Self Diagnostic Error Codes (Other Codes)5.2 General TroubleshootingNo Control Panel DisplayControl Panel LED is on, No Control Panel DisplayPrinter does not appear to Operate at Power On.Printer Continually Displays “Warming Up” or “Initializing”Troubleshooting AC Power SupplyTroubleshooting DC Power SupplyTroubleshooting RAM Memory FailuresPaper Size Errors5.3 Troubleshooting Error CodesFuser FailureEnvironmental Sensor FailureMotor Overheating FailureEngine Control Board FailureLVPS Power Supply FailureFiery Controller Fan FailurePower Supply Fan FailureFan FailureDuplex Interface FailureTray 2, 3, 4 Communication ErrorsInverter Unit Interface FailureCyan, Magenta, Yellow, Black LED FailureFuser Fan FailureFuser 110V/220V Mismatch ErrorUnsupported Duplex Unit RomFuse Cut Error (Fuser)Fuse Cut Error (Transfer Belt Unit)Fuse Cut Error C, M, Y, K Imaging Drum UnitFiery Controller to Engine Board Communication FailureFinisher Interface ErrorInverter Power Supply FailureControl Panel Communication FailureError in the Transfer BeltC, M, Y, K Imaging Drum Unit FailureEngine Board Flash Memory ErrorUnsupported ROMToner Sensor Detection ErrorMT Home Position Detection ErrorToner Feed Switch Error/Toner Lock ErrorColor Up/Down ErrorTop Cover Open ErrorFuser Unit Detected as MissingImage Drum Unit Life ErrorFuser Life ErrorBelt Life ErrorToner Out Error