Lexmark Optra S Service Manual - Page 252
Scheduled Maintenance (2420/2450/2455/3455), 99A0503 - 220V/750W 2420/2450/2455
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4059-XXX Scheduled Maintenance (2420/2450/2455/3455) The operator panel displays the message "80 Scheduled Maintenance" at each 250K page count interval. It is necessary to replace the fuser assembly, transfer roller, compensator pick-rolls and charge roll at this interval to maintain the print quality and reliability of the printer. The parts are available as a maintenance kit with the following part numbers: 99A0290 - 100V/750W 2450 99A0500 - 115V/750W 2420/2450/2455 99A0503 - 220V/750W 2420/2450/2455 99A0823 - 115V/750W 3455 99A0824 - 220V/750W 3455 After replacing the kit, the maintenance count must be reset to zero to clear the "80 Scheduled Maintenance" message. Refer to "Maintenance Page Count (2420/2450/2455/3455)" on page 3-20. 6-2 4059 Service Manual