Kodak 800 SERIES service manual Horizontal Banding, Defective Magenta Cartridge

NovaJet 800 Series Service Manual

Horizontal Banding

1.Check the print mode for the type of image being printed. Is the enhanced print pass mode printing OK? Note: photo pass mode may microband in some of the 2 tone color ranges including blue, gray, orange, and purple hues. Enhanced modes should not microband.

Check to see if the media is loaded correctly and is of proper thickness (no greater than 20 mil media can pass through the machine). Check to see if the media guides are in place and are not defective. Check the pinch rollers for alignment/ damage.

Figure 4-23. Defective Magenta Cartridge.

2.Are the color deadband and color calibrations correct? Refer to Printer Calibrations. Inspect the Prime pattern and verify diagonal line in the jet test is consistent throughout. The diagonal line in the Prime pattern should not have sections or lighter and darker shades, it should not be dissolved or broken. Refer to Printer Features - ‘Jet Out Detection’. Clean, manually bypass clogged jets, or replace the cartridge if any of these abnormal conditions exist. Defective or clogged cartridges account for 90% of the banding observed.

3.Change the preheat setting for the affected color. To gain access select SetUp Menu, Ink Option Menu, Ink PreHeat Settings, choose the appropriate color. If this does not help, then return settings to zero (0) default at completion of test.

Troubleshooting 4-31