Image-formation troubleshooting
The image-formation system is the central hub of the MFP. During image formation, an image is
formed with toner and then fused onto the paper. The image-formation system consists of the
following physical components:
■ Laser/scanner
■ Print cartridge
■ Fuser
■ Transfer roller
■ Supporting circuitry (power supply and dc controller PCA)
Before beginning the image-formation troubleshooting, check that the media meets the specifications
that are listed the HP LaserJet Printer Family Print Media Guide. This guide is available for download
in .PDF file format at
www.hp.com/support/ljpaperguide. Also see Media specifications.
Media-related print-quality problems
Use media that meets HP paper specifications. See the specifications listed in the HP LaserJet
Printer Family Print Media Guide.
If any of the following conditions exist, print-quality problems can occur:
■ The surface of the media is too smooth. Use media that meets HP paper specifications. See the
specifications listed in the HP LaserJet Printer Family Print Media Guide.
■ The printer driver is set incorrectly. Change the paper-type setting.
■ The media is too heavy for the MFP, and the toner is not fusing to the media.
■ The transparencies are not designed for good toner adhesion or high fusing temperatures. Use
only transparencies that are designed for HP LaserJet printers.
■ The moisture content of the paper is uneven, too high, or too low. Use paper from a different
source or from an unopened ream of paper.
■ Some areas of the paper reject toner. Use paper from a different source or from an unopened
ream of paper. Make sure that the paper has not been previously used.
■ The letterhead is printed on rough paper. Use a smoother, photocopy-grade paper. If this solves
the problem, consult with the letterhead supplier to verify that the paper used meets the
specifications for this MFP.
■ The paper is excessively rough. Use a smoother, photocopy-grade paper.
■ The paper has a coating that is not compatible with the electrophotographic process.
■ The letterhead or other preprinted media was printed with inks or other materials that can
contaminate the fuser, which causes offset or repeated images.
■ The use of some carbonless papers contaminates the MFP and can cause damage if used
repeatedly.
Image-formation troubleshooting 363
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