The operator panel displays the message 80 Scheduled Maintenance at each 300K page count interval. It is necessary to replace the fuser assembly, transfer roller, charge roll, and pick tires at this interval to maintain the print quality and reliability of the printer. After replacing the kit, the maintenance count must be reset to zero to clear the “80 Scheduled Maintenance” message. Compatible with: Lexmark T650dn Lexmark T650dtn Lexmark T650n Lexmark T652dn Lexmark T652dtn Lexmark T652n Lexmark T654dn Lexmark T654dtn Lexmark T654n Lexmark T656dne Lexmark TS654dn Lexmark X651de HV Lexmark X651de LV Lexmark X652de HV Lexmark X652de LV Lexmark X654de HV Lexmark X654de LV Lexmark X656de HV Lexmark X656de LV Lexmark X656dte HV Lexmark X656dte LV Lexmark X658de HV Lexmark X658de LV Lexmark X658dfe HV Lexmark X658dfe LV Lexmark X658dme HV Lexmark X658dme LV Lexmark X658dte HV Lexmark X658dte LV Lexmark X658dtfe HV Lexmark X658dtfe LV Lexmark X658dtme HV Lexmark X658dtme LV