Repair
7-10
Replacing a VJ Printhead
Valve
If after backflushing a valve your print quality does not improve, it may be
necessary to replace a valve. To replace a valve follow the directions below:
1) Purge the printhead. (See “Purging a VJ Printhead” on page 5-3.)
2) Run a print sample while the printhead is in the “purge” mode.
3) Check the print sample to locate the problem valve. The problem valve
is indicated by either the missing or poor quality dot(s) on the print
sample.
4) Starting with the top dot of the print sample and working down, count
the dots of the sample; the problem valve will correspond with the
problem dot (see Figure 7J);
OR, using an ohm meter, check the coil resistance of each valve. The
resistance should be at 24 ohms, +/-1. Any valves that do not fall
within this range must be replaced.
5) Exit the purge mode on the controller.
Figure 7J: Valve to Nozzle Configuration
Nozzle
Message Print
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7
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16
Valves
Viewing Front of Printhead
VJ 16 Series
VJ 7 Combo
1" (26 mm)
VJ 7 Combo
1/2" (13 mm)
VJ 7 Series
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16
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7
Summary of Contents for PatrionPlus
Page 41: ...Installation ii 29669 02080 Rev AF...
Page 72: ...Operation iv 29669 02080 Rev AG...
Page 153: ...Maintenance ii 29669 02012 Rev AF...
Page 161: ...Troubleshooting ii 29669 02080 Rev AF...
Page 184: ...Repair ii 29669 02080 Rev AF...
Page 212: ...Parts List ii 29669 02080 Rev AF...
