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 129) for help with persistent image formation problems. Table 6-9. Image Quality Checks 110 Chapter 6 Troubleshooting C4170-90959 Image Quality Checks Action Does the problem repeat on the page? Use the “Repetitive Defect Ruler” (page 127).
Is the Toner Cartridge full and is it manufactured by HP? “Check the Toner Cartridge” (page 111). 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 Tables? Compare and perform the actions recommended in the “Image Defect Tables” (page 112). Is the problem on the Toner Cartridge drum or the Transfer Roller? Perform the “Half Self-Test Functional Check” (page 127) 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 129).