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Troubleshooting 4-57
NovaJet 800 Series Service Manual
Figure 4-60. Excessive Ink Pressure.
Caution: overfilling the cartridges with ink (greater than 35 ml) can
cause pressure regulating problems in the ink delivery system where large
ink droplets can fall from cartridges, thus damaging the prints. High
humidity in the printing environment and a dirty environment can also
cause large ink droplets to form.
Ink Dropout
If the printer is experiencing ink dropout or temporary ink starvation
conditions it can be improved by modifying the preheat settings under the
‘Ink Option Menu’. Symptoms include horizontal bands that recover in all
cases and the typical banding pattern can either be consistent or inconsis-
tent. Please refer to the illustration below of the typical symptoms
encountered. Note: the vertical edges of the print are not skewed or
exhibit swath shift. If swath shifts are observed then this is a servo
motor or bushing problem.
NOTE: The horizontal bands do not extend beyond the page layout or
edges of the print.