ENWW Chapter 7 Troubleshooting 209
Image-formation troubleshooting
When you are working with customers, obtain a print sample before troubleshooting the printer.
Ask the customer to describe the quality expected from the printer. The print sample also helps
clarify the customer’s description of the problem.
Often an image-formation problem can be linked to media that is outside the specifications that
Hewlett-Packard has established for optimum printer performance. See “Media troubleshooting”
on page 217 for help with persistent image-formation problems.
Image-quality
checks
Action
Does the problem
repeat on the page?
Use the “Repetitive defect ruler” on page 226 to determine the source of the
problem.
Is the print cartridge full
and is it manufactured
by HP?
See “Check the print cartridge” on page 210 for information about the print
cartridge.
Is the customer using
print media that meets
all HP specification
standards?
See chapter 2, beginning on page 34, for information about media specifications.
Is the print sample
similar to those in the
image-defect tables?
Compare the sample to the tables and perform the actions recommended in the
“Image-defect tables” on page 211.
Is the problem on the
print cartridge or the
transfer roller?
Perform a half-self-test functional check (see page 227) to determine the location
of the defect.
If a dark and distinct toner image is present on the drum surface, assume that the
first four functions of the electrophotographic process—cleaning, conditioning,
writing, and developing—are functioning correctly, and troubleshoot the failure as
a transfer or fusing problem. (See chapter 5 for information about the the
electrophotographic process.)
Is the customer using a
media type that is
recommended for this
product?
See “Media troubleshooting” on page 217.
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