EPSON Stylus Pro 9000 Revision B
Troubleshooting Troubleshooting Based on Your Printout 67
3.3 Troubleshooting Based on Your Printout
This section describes the conceivable print quality problems that may occur
with this printer and the troubleshooting points for those errors.
DOT MISSING
When the printer is not used for a long period of time, the ink in the nozzles can
dry up and clog the nozzles. Clogged nozzles cannot fire ink and cause the
dot-missing problem in printed documents. If the printhead nozzles do not clear
after attempting multiple cleaning operations, check the following points.
1. If there is no output at all or only some the colors print, check the ink valves
on either side of the printer I/H Assemblies to make sure the knobs are set
to “Open”. (Also, see the user’s guide or printer software.)
2. Perform ink charging again
Select the “Cleaning” function on the control panel’s Self-Diagnostic menu.
This sends a lot of ink into the heads and forces out the old ink that is
clogging the nozzles.
3. If the extra ink charge does not clear the clogged nozzles, confirm the
following.
n There is no damage to or foreign materials in rubber of the Cap
Assembly
n The Cap Assembly valve is operating normally (if it is not, the Cap
Assembly will not properly absorb ink
n The Cap Assembly retention spring is working properly.
n The ink tubes and pipes between the ink cartridges and printheads are
properly connected and are not damaged (check the nuts for tightness,
the O-rings for warping, and the tubes/pipes for ink leakage)
4. If after following the above steps the printout still shows missing dots,
replace one of the parts listed below and check the print out.
n Main Board
n Printhead(s)
Table 3-4. Print Quality Problems
Description Refer to
Dot missing page 67
Uneven printing/poor resolution page 68
Smudged or marred printout on front side page 68
Smudged or marred printout on reverse side page 68
White/black banding page 68
CAUTION
Do not charge ink too often as this operation
consumes a lot of ink. Each head consumes about
88.58ml per operation.
CAUTION
n Before you uninstall the Main Board or a printhead,
make sure all cables are disconnected. After
installing the new board or head, make sure all
cables are properly connected; if cable connectors
not completely inserted, they can damage circuits
or the heads when current is turned on.
n Make sure you replace the correct head, B head or
C head.
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