HP Color LaserJet Enterprise CP4020 HP Designjet 4020 and 4520 Printer Series - Page 203
Preventive maintenance
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About printer ● HP-GL/2 palette: shows the color or grayscale definitions in the currently-selected color palette. ● PostScript font list: lists the PostScript fonts installed in the printer (PostScript printers only). ● Image diagnostics: helps you to solve print quality problems. See How do I... (Image Diagnostics Print topics) on page 117. ● Service information: provides information needed by service engineers. Preventive maintenance During the life of your printer, components that are used constantly can wear out with time and use. To avoid these components being so worn that the printer breaks down, the printer keeps track of the number of cycles the printer carriage makes across the axis of the printer and on the total quantity of ink printed. The printer uses this number to advise you of the need for preventive maintenance, displaying one of the following messages on the front panel: ● Maintenance #1 required ● Maintenance #2 required These messages mean that some components are nearing the end of their lives. You can continue printing for quite some time, depending on your use of the printer. However it is strongly recommended that you contact your customer service representative and arrange for a preventive maintenance onsite visit. The service engineer can then replace the worn parts, which will prolong the life of the printer for a further period. The benefits of arranging a service engineer's visit when the front panel displays these messages are two-fold: ● The printer components can be replaced at a time that is convenient for you and so will not disturb your daily workflow. ● When the service engineer performs a preventive maintenance visit he will replace several parts at once. This will avoid the need for repeat visits. ENWW Preventive maintenance 193