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A-16 Phaser 8400/8500/8550/8560 Color Printer Service Manual
Reference
Step
11
Print Service
Test 2: Weak
and Missing
Jets.
Are there weak
or missing
jet(s)?
YES
NO
Circle
one
x If NO go to Step 12.
x If YES, do the following:
x Check the exit area of the paper path for debris that could be
scraping ink off the drum and may mimic a weak or missing jet.
x Select Eliminate Light Stripes - Basic from the printer front
panel up to 3 times as needed to recover a weak or missing jet.
x Select Eliminate Light Stripes - Advanced from the printer front
panel up to 2 times as needed to recover a weak or missing jet.
x Select Jet Substitution to substitute a working jet for the
missing jet. However, if any of the following criteria is met, you
should replace the printhead instead.
x If the customer uses the billing meters features.
x If three missing jets of the same color are adjacent (for
example cyan jets 79, 80, and 81).
x By the customer runs mainly in Fast Color or Standard mode
(as revealed on the Usage Profile page).
The repair is complete!
Step
12
Is the customer
experiencing
vertical bands
(not light
stripes) in solid
color areas?
YES
NO
Circle
one
x If YES, print 10 solid fill pages of cyan. If the bands vary in intensity
and/or location over the 10 prints, the customer is experiencing
stagnant ink discoloration. Continue to print solid fills of the
offending color until the output is uniform. It may take as many as 60
solid fill pages to refresh all of the ink in the printhead reservoir. The
repair is now complete!
x If No, the repair is complete!
Comments: (Xerox U.S. personnel please add all comments into FIST)
____________________________________________________________________________
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A completed checklist and
sample prints must be returned with each printhead.
Xerox reserves the right to refuse reimbursement
to service personnel who do not enclose a
completed troubleshooting checklist and a sample print with each returned printhead.
Please return the following items with the defective printhead:
x Service Print 1 (not necessary for error code-based
failures (not applicable for printheads replace because of
an error code)
x This Printhead Troubleshooting Checklist (filled out)
x Inventory control “Green Tag” (filled out)
x Sample prints that clearly show the observed print quality
defect (not applicable for printheads replace because of an
error code)
Service Print 1