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Maintenance 3-20
NovaJet 800 Series Service Manual
5. Clean the cartridge electrical and carriage flex driver cable
contacts with isopropyl alcohol. Refer to Scheduled Maintenance.
Reseat the flex driver cable connection for print images which
contain vertical bar patterns along the right edge of print. If more
than one color (represented by the vertical bars) is present then
the trailing cable is either unseated or defective.
6. Clean the encoder strip (top and bottom) and inside of carriage
belt with distilled water. Clean the slide shaft with isopropyl
alcohol.
7. Change media to see if electrostatic discharge from media is
causing the banding to occur. Add 3rd party protection if required.
8. Ensure vacuum fan is providing adequate suction for media. It is
possible that binding of the feed roller may also occur (leading to
microbanding and abnormal print anomalies) if the stand legs are
not secured to the printer head securely. A rocking motion (from
the weight of the carriage assembly movement during printing) is
created which can cause shifting of the printer base.
9. Turn printer off. Slowly move carriage head back and forth
manually to ensure no obstructions are causing the print defects
observed (i.e. tape on the rear cover, tie-straps under the
electronics cover, or low carriage head height).
10. Check E-Connect Print Server. Carriage head hesitation (which
causes microbanding) is normally caused by a low data port rate
(information cannot get through the print server fast enough).
While the E-Connect is rated for 700 kilo bytes per second (fast
enough to handle any large format demands at the fastest printer
speed available), an improperly configured server or a server in a
high traffic environment may be the cause of the microbanding.
Test printer with limited or no network traffic to verify. Reconfigure
the E-Connect if necessary and turn off any redundant or unused
protocols. Please consult a network administrator for assistance.
11. Print a test RTL file to verify banding, if banding is absent, then
check software. Obtain the Demo Images CD and refer to the
Multimedia Operations CD - 'Demonstration Print' for proper
procedure. Print at least 50% of the test print (1/2 meter long)
before deciding the next course of action. The Test Print (Utility