C5100 Troubleshooting • 137TroubleshootingLCD MESSAGESMessage Meaning What to Do* TONER SENSOR ERROR Flashes across thesecond line of thedisplay: the indicatedcolor toner (*) ismissing from theprinter.Open the top cover andmake sure theindicated toner is thereand properly seated inthe printer: C = Cyan, Y= Yellow, M = Magenta,K = Black.ADD MORE MEMORY420: MEMORY OVERFLOWThe document sizeis too large for theprinter’s memory.Reduce the size of thedocument. If thishappens frequently,install additionalmemory (see “RAMMemory” on page 113).CANCELLING JOB(JAM)The setting for JamRecovery in themenu has beenchanged to off and apaper jam hasoccurred. Anyunprinted data isbeing deleted.Clear the jam andresend the missingpages of the print job.CHECK BELT330: BELT MISSINGThe belt unit is notproperly installed.Open the top cover andlift out the black (K)and Yellow (Y) imagedrums, placing them ona flat surface. Check tobe sure that the beltunit latches are fully inthe latched position:then reinstall the imagedrums.
