HP Pro 4300 C9H70UT C9H70UT#ABA manual Image-formation troubleshooting

Image-formation troubleshooting

The image formation system is the central hub of the printer. During image formation, an image of toner is formed 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 image formation troubleshooting, check that the media meets the specifications listed in chapter 1 and/or the HP LaserJet Printer Family Print Media Guide. See “Supported sizes and weights of media” on page 10 and “Supported types of media” on page 14.

Print quality problems associated with media

Some print quality problems arise from use of inappropriate media.

●Use paper that meets HP paper specifications. See the specifications listed in the HP LaserJet Printer Family Print Media Guide.

●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 driver/printer is set incorrectly. Change the paper type setting.

●The media you are using is too heavy for the printer, and the toner is not fusing to the media.

●The transparencies you are using are not designed for proper toner adhesion or high fusing temperatures. Use only transparencies designed for monochrome

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 the paper has not been previously used.

●The letterhead you are using is printed on rough paper. Use a smoother, photocopy paper. If this solves your problem, consult with the printer of your letterhead to verify that the paper used meets the specifications for this printer.

●The paper is excessively rough. Use a smoother, photocopy paper.

●The paper has a coating that is not compatible with the electrophotographic process used by this printer.

●The letterhead or other pre-printed media was printed with inks or other materials that can contaminate the fuser which can cause offset or repeated images.

●The use of some carbonless papers can cause printer contamination and can cause printer damage if used repeatedly.

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