37Error MessagesSome of the more common errormessages appear below. For additionalerror messages, see “Error Messages”under “Troubleshooting” in youron-line User’s Guide.XXX TONER SENSOR ERRORAppears on the second line of thedisplay to indicate that the lever forthe toner cartridge color indicated isnot pushed all the way back.What to DoOpen the cover. Push the lock levertoward the back of the printer as far asit will go. Close the cover. If this doesnot clear the message, call your localservice dealer.XXX TONER LOWAppears on the second line of thedisplay to indicate that color XXXtoner cartridge is getting low.Note:If you have changed the LOWTONER item in the SYSTEMCONFIG MENU to STOP, theATTENTION light will blink and youmust either replace the toner cartridgeimmediately or press the ON LINEbutton to continue printing.What to DoBe sure you have a replacement tonercartridge (see page 3) on hand.INSTALL NEW TONERnnn: XXXX TONER EMPTYThe toner cartridge indicated (XXX)has run out of toner.What to DoReplace the toner cartridge.XXXX DRUM NEAR LIFEAppears on the second line of thedisplay to indicate that color XXXX(e.g, BLACK) image drum needs to bereplaced.What to DoReplace the XXXX image drum. (Seethe instructions supplied with the newimage drum.)INSTALL ADDITIONAL MEMORY420: MEMORY OVERFLOWThe amount of data in the file beingprinted has exceeded the printer’smemory.What to Do• Reduce the size of the file beingprinted (e.g., print the file asseparate groups of pages instead ofall the pages at one time).• Install additional memory in theprinter (see your on-line User’sGuide for more information).