Image defect ruler
Use a ruler to measure occurrences of repetitive image defects to help solve image quality problems.
Place the ruler next to the first occurrence of the defect on the page. Find the distance between identical
defects and use the figure below to identify the component that is causing the defect.
OPTICAL PHOTO CONDUCTOR 96mm
FUSER 76mm
PRESSURE ROLLER 62mm
DEVELOPER 47mm
TRANSFER ROLLER 43.6mm
PRIMARY CHARGING ROLLER 38mm
0mm
238 Chapter 6 Troubleshooting ENWW
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