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Troubleshooting 4-47
NovaJet 800 Series Service Manual
Figure 4-50. ESD Problem.
7. Change media to see if electrostatic discharge from media is
causing the banding or ink over-spray to occur. Add 3rd party
ESD protection if required (static eliminator strip).
8. Perform the carriage vibration test under ‘Diagnostics’ Menu, the
lines should print fine lines with no jagged edges.
9. Print a demo print from the sample images CD. If no overspray or
similar problems show, then check the software driver or original
file. Draw a simple box and send to print from application; default
line thickness should be 0.008" (AutoCAD). Check printed output
for correct line thickness. Obtain the Servicing Support CD and
refer to ‘Demonstration Print’ for proper procedures. Ensure the
demonstration print is correct.
Cartridge Warranty
To check cartridge ink throughput select Utility Menu, Service Menu,
Cartridge Info. There is a 500 ml warranty on the print heads; the
cartridge shuts off at 1280 ml (NJ850) or 1500 ml (NJ880) with a “Car-
tridge End of Life” message and the cartridge must be replaced.
Note: replace defective cartridge with a warranty cartridge if less than
500 ml throughput and a problem cannot be corrected with cartridge
cleaning or manual jet bypass (see Cartridge Maintenance & Testing)
below.