2-12 Phaser 4400 Laser Printer Service ManualFan Failure; Power Off Now. Code: U5 2-49Engine Logic Board NVRAM Failure. Code: U6 2-50Image Processor POST Error Codes 2-58Error Message SummariesNote: The messages listed in the ìDiagnostic Messageî columnappear only in Service Diagnostics while printing EngineTest Prints. The code numbers in these messages alsoappear as part of the Help information displayed when youpress i.Front PanelMessageDiagnosticMessageError Description TroubleshootingProcedureJam At Tray [#];Open Tray [#]and Front Coverto Clear.Press i.E2-01: Feed JamE2-02E2-03Paper arrives atRegistration Sensortoo early.Open Tray [#].Open Front Cover.Clear Paper Path.Go to Jam at Tray [#]. OpenTray [#] and Front Cover.on page 2-18.E2-11: Feed JamE2-12E2-13Paper does notarrive at RegistrationSensor positionwithin the specifiedtime.Jam AtEnvelopeFeeder;Remove Feederand Open FrontCover to Clear.Press i.E2-0E: Feed Jam Paper arrives atRegistration Sensortoo early.Remove Envelope Feeder.Open Front Cover.Clear Paper Path.Go to Jam at EnvelopeFeeder; Remove Feederand Open Front Cover. onpage 2-21.E2-1E: Feed Jam Paper does notarrive at RegistrationSensor positionwithin the specifiedtime.Jam At MPT;Open FrontCover To Clear.Press i.E2-0M: Feed Jam Paper arrives atRegistration Sensortoo early.Open Front Cover andremove paper.Go to Jam at MPT; OpenFront Cover to Clear. onpage 2-22.E2-1M: Feed Jam Paper does notarrive at REGSensor positionwithin the specifiedtime.Index of Errors (cont'd.)Front Panel Message Page