|
Select
the best image or images below to characterize the problem your
printer is experiencing:
2-1.
If
horizontal bands appear at regular intervals ensure the Autowipe
function is turned off. Also ensure Preheat values are returned
to default (Init Settings selected will return all user settings
to default). Perform
a test print from multiple applications to verify problem is not
application or RIP specific. Call for service.
2-2.
For
colors which are inconsistent across the image, typically the left
and right sides are different from the rest of the color space (referred
to as ghosting), please ensure the preheat levels are optimized.
Also slow the printer speed down and increase print pass mode, adjust
preheat levels of affected color as necessary. You may have to fill
white space areas with 2% yellow to control on printer models that
do not have preheat settings (NovaJet PRO 50 and earlier).
2-3.
If
horizontal swath shifts appear in randomly throughout the print
then the carriage bushings are either dirty or worn. Replace carriage
bushings. The exception is NovaJet PRO 600e printers with firmware
versions 2.12 and below. Upgrade firmware on the NovaJet PRO 600e
printers before assuming bushings are defective. Call for service.
2-4.
If
long horizontal swath shifts appear randomly across the entire print
and extend beyond the page layout borders then the firmware version
is functioning incorrectly or the servo motor is starting to fail.
On the NovaJet PRO 600e printer models with firmware versions 2.12
and below this problem has been observed. Upgrade the firmware on
the NovaJet PRO 600e printers before assuming hardware is defective.
Symptoms could also be caused by dirty or worn carriage bushings.
Inspect carriage bushings. Call for service.
2-5.
If
the color changes slowly (i.e. over 1 meter) in the vertical direction
as the image is printed then the media may have suffered humidity
exposure and damage. If the media is verified good and the problem
continues then the Main Board may be defective. Rotate image 90
degrees in application and ensure blur filters are not used. Perform
a test print from multiple applications to verify problem is not
application or RIP specific. Call for service.
2-6.
If
the color dramatically changes or shifts once (exhibits a hard border)
at the beginning of each print then the network, NT server, print
server, or printer carriage board is at fault. Verify the Raster
Image Processor or Driver is not causing the problem by printing
a test print directly to printer from the sample images CD supplied
with printer. Call for service.
2-7. 
If
the color changes or shifts quickly (soft border) and one color
fails to continue to print then ink starvation has occurred (i.e.
magenta is lost completely in the example above). Ensure the cartridge
is primed properly and contains approximately 20 ml of ink. The
ink level inside the cartridge must be between 8 ml and 40 ml to
sustain the required negative pressure for normal print operations.
Use the syringe and syringe tip provided with the printer to place
ink into cartridge (print head). Reprime the cartridge using the
suction bulb, NovaPrime, or EasyPrime device. Check all ink delivery
line connections and retest by running a color test in a low pass
print mode.
If the problem continues or returns after a short period of time
then replace cartridge tubing needle and cartridge to help isolate
the problem. Call for service.
2-8. 
If
the color dramatically changes or shifts multiple times (each change
exhibits a hard border) down the print then the RIP or NT server
likely has a problem with the service pack version or a problem
exists with the print server. Verify the Raster Image Processor
or Driver is not causing the problem by printing a test print directly
to printer from the sample images CD supplied with printer. For
parallel cable connectivity verify all hardware is IEEE 1284 compliant
(includes wall switches). Perform a test print to isolate problem.
Call for software support.
2-9. 
If
microbanding (depicted above) is occurring in the printed output
then defective cartridges, printer calibrations, or low print pass
modes typically cause the error. Ensure the proper print pass mode
is utilized for enhanced photo operations. Use the following suggested
printer settings to ensure microbanding does not occur for each
printer model:
NovaJet
PRO/PRO 50/Croma24/NovaCut:
-4 Pass, UNI-DIR, 7000 firing rate
NovaJet
PROe/600e/500/505/630/700/750:
-6 Pass, BI-DIR, 10 Speed
NovaJet
850, 2x4 mode:
-4 or 5 Pass, BI-DIR, 10 Speed
NovaJet
850, 1x4 mode:
-6 Pass, BI-DIR, 10 Speed
NovaJet
850, 1x8 mode:
-4 or 6 Pass, BI-DIR, 10 Speed
Ensure
the Prime pattern is correct. The jet test (diagonal line) for each
color must be consistent in thickness and color. Ensure no clogs
are present (either bypassed or cleared through cleaning.) The integrity
of the prime pattern is critical to prevent microbanding. The example
of the prime pattern below illustrates a defective magenta cartridge.
Rotate
image 90 degrees in application and ensure blur filters are not
used, resend file to printer. Perform a test print from multiple
applications to verify problem is not application or RIP specific.
Do not use printers internal test print to verify banding problems
as this is vector data which may exhibit normal vector dithering
patterns. Replace all cartridges of affected color to isolate problem.
Call for service.
2-10. 
If
data is missing within a print then the print server is typically
at fault. Ensure 10/100 baseT network hubs are used (not switches);
100 baseT ethernet connectivity is suggested to ensure optimum data
rate. Turn off redundant IP protocols and screen savers. Isolate
the printer from other peripherals on the network by placing printer
on its own direct network interface if necessary; some RIPs allow
multiple printer configurations. The NovaJet 850 printer (and some
NovaJet 700 printers) require 100 baseT networking to meet the 1
MB/sec data rate requirement or data starvation will occur. Call
for network administration support.
2-11. 
If
diagonal banding appears down the image then typically the printer
hardware is at fault (servo motor pulley is bent) assuming the Raster
Image Processor (RIP) is not causing the error. In some cases the
diagonal banding can be caused by dirty or defective carriage bushings
(but typically only up to a 10 degree angle from the vertical plane.)
Rotate image 90 degrees in application, resend file to printer.
Perform a test print from multiple applications to verify problem
is not application or RIP specific. Call for service.
2-12. 
If
regular horizontal bands appear along the right edge of the media
then typically the service station or cartridge print heads are
dirty. Clean service station by rinsing with distilled water and
blot the bottom surface of all cartridges with a lint-free towel
saturated with distilled water. Reprime cartridges using the suction
bulb, NovaPrime, or EasyPrime to clear all jets. Ensure adequate
vacuum suction is present on printer's underside; air should be
blowing out of exhaust port (s) when print operations are activated.
Call for service.
Continue
to Next Page
|