114 Chapter 6 Troubleshooting C4170-90959
Image Formation Troubleshooting
When working with customers, obtain a print sample before troubleshooting the printer. Ask
the customer to explain the quality they expect from the printer. The print sample will also
help clarify the customer’s explanation.
Often an image formation problem can be linked to media that is outside the specifications
established by Hewlett-Packard for optimum printer performance. See “Media
Troubleshooting” (page 134) for help with persistent image formation problems.
Table 6-10. Image Quality Checks
Image Quality Checks Action
Does the problem repeat on
the page?
Use the “Repetitive Defect Ruler” (page 132).
Is the Toner Cartridge full
and is it manufactured by
HP?
“Check the Toner Cartridge” (page 115).
Is the customer using print
media that meets all HP
paper specification
standards?
For more information about HP’s paper specification standards,
see “Media Specifications” (page 28).
Is the print sample similar to
those in the Image Defect
Ta bl es ?
Compare and perform the actions recommended in the “Image
Defect Tables” (page 116).
Is the problem on the Toner
Cartridge drum or the
Transfer Roller?
Perform the “Half Self-Test Functional Check” (page 132) to
determine where the defect is.
If a dark and distinct toner image is present on the drum’s
surface, assume that the first four functions of the
electrophotographic process are functioning (cleaning,
conditioning, writing, and developing - see Chapter 5: Functional
Overview), and troubleshoot the failure as a transfer or fusing
problem.
Does the media meet HP
specifications?
See “Media Troubleshooting” (page 134).
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