Preventive maintenance 6-1
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6. Preventive maintenance
This chapter describes procedures for printer preventive maintenance. Follow these recommendations to help
prevent problems and maintain optimum performance.
Safety inspection guide
The purpose of this inspection guide is to aid you in identifying unsafe conditions.
If any unsafe conditions exist, find out how serious the hazard could be and if you can continue before you
correct the hazard.
Check the following items:
• Damaged, missing, or altered parts, especially in the area of the On/Off switch and the power supply
• Damaged, missing, or altered covers, especially in the area of the top cover and the power supply cover
• Possible safety exposure from any non-Lexmark attachments
Scheduled maintenance
The operator panel displays 80 Fuser Maintenance and 83 ITU Maintenance for scheduled maintenance.
80 Fuser Maintenance is displayed at 120,000 copies for C78x models, and at 200,000 copies for C77x models
indicating the fuser assembly needs to be replaced to maintain the print quality and reliability of the printer. The
parts are available as a maintenance kit with the following part numbers:
83 ITU Maintenance is displayed at each 120,000 copies when the ITU Assembly needs to be replaced to
maintain the print quality and reliability of the printer. There are two assemblies, ITU assembly and Second
Transfer Roll, in a maintenance kit. Both should be replaced at the same time. The parts are available as a
maintenance kits:
After replacing the kit, the fuser maintenance count must be reset to zero to clear the maintenance message.
84 Oiler Nearly Exhausted is displayed at each 100,000 copies when the Web Oiler Assembly is nearly
exhausted. Go to “Web Oiler Assembly” on page 7-9 for part number.
Standard fusers
Description
Part number
Models 1xx/3xx
(C77x)
Models 2xx/4xx
(C78x)
Maintenance kit 115 V fuser 40X1859 40X1831
Maintenance kit 220 V fuser 40X1860 40X1832
Maintenance kit 100 V fuser 40X1861 40X1833
ITU Maintenance kits
Description Part number
ITU Maintenance kit for 1xx and 3xx models 40X0342
ITU Maintenance kit for 2xx and 4xx models 40X0343
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