NovaJet 800 Series Service Manual

Menu, Service Menu, Test Print) may be used, but this test is a compressed vector based file and may exhibit certain dithering properties different from that of another rasterized print.

12.Refer to 'Cartridge Misfires' and 'Ink Dropout' to ensure all other troubleshooting checks have been made.

13.For single color or multiple color print failures replace the carriage PWA. If normal test patterns (i.e. Color Test and normal basic test patterns) are seriously degraded then replace the carriage PWA. Refer to Disassembly.

14.Inspect and clean stepper motor and lower roller drive gears if printer is older than 5 years. Other unique causes include synchronization errors from the stepper drive system due to defects or gear cleanliness.

15.Replace stepper motor for consistently spaced horizontal patterns (2 - 10 mm apart) when printer is run in the best mode with a test print. Often a lower roller drive noise will accompany the banding. Inspect stepper motor gearing/lower roller for damage/debris (ensure screws are tight).

Check stepper motor winding resistance.

16.Check lower roller height for head scrapes on media. Banding will have jagged or slightly angled lines at the termination points or may even appear as light cuts in the media (like a utility knife cut the surface of a print). The normal head height range between the bottom surface of the cartridges and the platen surface is 0.062" to 0.068". Use the Carriage Head Height Kit for proper adjustment. Refer to Alignments.

17.Replace the servo motor for horizontal bands (thicker than 2 mm) which extend beyond the page layout from .5 mm to 20 mm. The servo motor bearings may be faulty; normal servo motor life is 1600 to 2500 plot hours. Horizontal bands (0.2 mm to 1 mm) which extend beyond the page layout are usually caused by the workstation memory or the driver not having sufficient work space. Ensure 1GB is free on hard drive at all times; 256 MB of memory is suggested. Partitioning the hard drive is recommended. Refer to Disassembly.

MAINTENANCE

Maintenance 3-21

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Kodak 800 SERIES service manual Maintenance