HP Scitex FB910 Printer series, FB910, ColorSpan Legacy Printers Troubleshooting guide

HP Scitex FB910 Printer series, FB910, ColorSpan Legacy Printers Troubleshooting guide
Recovering Jets
On ColorSpan Legacy UV-Cure Printers
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Preventing Jet Problems
The piezo printhead technology used in ColorSpan Legacy UV-Cure printers is robust and long-lived when properly
maintained. The nature of UV-curable ink, however, does mean that individual jets on a printhead that stop working
may be difficult or impossible to recover. To avoid this situation, be sure to always follow these guidelines:
1. Clean the printheads daily. See Tech Note 2736, DisplayMaker UVR & UVX: Daily Cleaning Procedures, for the
step-by-step cleaning process that should be performed each day.
2. Maintain a good environment for the printer:
• Protect the printer from external light pollution. Leave all light-blocking apparatus in place on the printer.
Avoid placing the printer in locations where it is exposed to natural or artificial light sources that could
reach the printheads.
• Avoid leaving the printer idle in environments with sustained high temperatures.
3. React to any possible headstrike by the carriage on media by cleaning the printheads immediately, even if you
don’t think the printheads touched the media. Despite the precautionary designs built in to the printer to protect the
printheads, accidents can happen. It is not possible to know whether a headstrike touched the printheads or not.
Cleaning the printheads any time there is a headstrike event is the best preventative process.
Recovering Missing Jets
Clean the Printheads
A simple cleaning of the printheads with an appropriate cleaning cloth moistened with HP Printhead Flush Solution
is always the first step in recovering jets. See the aforementioned Tech Note 2736, DisplayMaker UVR & UVX: Daily
Cleaning Procedures, for the step-by-step cleaning process.
Perform a Standard Air Purge
The Purge option found on the printer’s Front Page is the next step to attempt to recover missing jets. Consult the printer’s
User Manual for detailed information the Purge. In summary, the steps include:
1. Remove the left-side parking station from the printer.
2. Select Purge from the Front Page of the printer’s control panel.The carriage will travel from Home to the left side of
the printer. The Vacuum/Pressure system will then use air pressure applied to the printheads to force a small quantity
of ink out of the printhead jetting orifices.
3. Use an appropriate cleaning cloth moistened with HP Printhead Flush Solution to blot away the expelled ink.
4. Return the carriage to Home and reinstall the parking station.
5. Print a Prime Bar to check for jetting improvement.
Print the Jet Recovery Pattern
The Jet Recovery Pattern uses an increased firing impulse applied to the printheads to “jump start” any jets that appear
to be hesitant to fire. After the operator selects the desired printheads, the Jet Recovery Pattern prints a six-inch long
solid block across the width of the media, then follows with a Prime Bar pattern printed with the normal printhead firing
impulse.
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Perform a Performance Air Purge
The Performance Air Purge is found in the Maintenance menu. The Performance purge uses more air pressure to force
a larger quantity of ink through the printheads. Consult the printer’s User Manual for detailed information the Purge.
In summary, the steps include:
1. Select “Menu -> Maintenance -> Air Purge”, then select Performance Purge.
2. The carriage will move to the left to allow you to open the wiping station cover. The carriage then returns to Home
position over the wiping station.
3. The Vacuum/Pressure system will then use air pressure applied to the printheads to force a large quantity of ink
out of the printhead jetting orifices.
4. When prompted, use the supplied wiping tool to gently wipe away remaining excess ink. The action does not clean
the printheads, it only removes ink that would otherwise fall an splatter on the platen or media when the carriage
next moves.
5. The carriage will travel to the left side of the printer.
6. Remove the parking station.
7. Use an appropriate cleaning cloth moistened with HP Printhead Flush Solution to blot away the expelled ink.
8. Close the wiping station cover, allow the carriage to return to Home, and reinstall the parking station.
Use AutoJet or Manual Jet Mapping to Compensate for Missing Jets
If jets are still missing after performing all of the above steps, use the printer’s built-in software features to identify the
missing jets through AutoJet calibration or Manual Jet Mapping. The printer will then use the remaining good jets as
substitutes for the missing jets, allowing continued use of the printhead despite the missing jets. In extreme cases, it
may be necessary to print in High Quality mode, which offers the maximum amount of jet replacement compared to
Production mode.
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© Copyright 2008 Hewlett-Packard Development Company, L.P.
The information contained herein is subject to change without notice.
The only warranties for HP products and services are set forth in the express warranty statements accompanying such
products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for
technical or editorial errors or omissions contained herein.
TN2739C
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