HP LaserJet 9040/9050 Service Manual - Page 259
matches the pattern of the ruler, replace the indicated roller.
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Repeating defect ruler Repetitive print defects are usually caused by a specific roller in the printer or the print cartridge. Use the following figure to isolate the cause of repetitive print defects. Align the first occurrence of the defect with the top of the "ruler" (at the top or bottom of the misprinted page), and measure to the next occurrence of the defect to determine which roller is causing the defect. When the defect pattern matches the pattern of the ruler, replace the indicated roller. Figure 130. Repeating defect ruler Image-formation troubleshooting 243
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 |
Image-formation troubleshooting
243
Repeating defect ruler
Repetitive print defects are usually caused by a specific roller in the printer or the print cartridge. Use
the following figure to isolate the cause of repetitive print defects. Align the first occurrence of the
defect with the top of the “ruler” (at the top or bottom of the misprinted page), and measure to the
next occurrence of the defect to determine which roller is causing the defect. When the defect pattern
matches the pattern of the ruler, replace the indicated roller.
Figure 130.
Repeating defect ruler