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Phaser 8400/8500/8550/8560 Color Printer Service Manual A-11
Reference
Step
11
Print Service
Test 1: 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 from the printer front panel up to
3 times as needed to recover a weak or missing jet.
x Perform the JetFix technique by downloading the appropriate
snippet (such as 8400_jetfix_c.ps for a missing cyan jet) to the
printer. The snippets are available on the Customer Support
Resources website in the Phaser 8400 web pages. Refer to
Service Bulletin 640.
x If the jet is still missing, replace the printhead.
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)
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
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 Two prints of Service Print 1
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
12346789 10 1112 13 14 1516 17 18 1920 21 22 23 2425 26 27 2829 30 31 3233 34 35 3637 38 39 4041 42 43 4445 46 47 4849 50 51 5253 54 55 5657 58 59 6061 62 63 64 6566 67 68 6970717273747576777879808182838485868788
5
12346789 10 1112 13 14 1516 17 18 1920 21 22 2324 25 26 27 2829 30 31 3233 34 35 3637 38 39 4041 42 43 4445 46 47 4849 50 51 5253 54 55 5657 58 59 6061 62 63 64 6566 67 68 6970717273747576777879808182838485868788
5
12346789 10 1112 13 14 1516 17 18 1920 21 22 2324 25 26 27 2829 30 31 3233 34 35 3637 38 39 4041 42 43 4445 46 47 4849 50 51 5253 54 55 5657 58 59 6061 62 63 64 6566 67 68 6970717273747576777879808182838485868788
5
74 7576 77 78 7980
Weak jet
9923-114
1234 678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788
5