HP M1522nf Service Manual - Page 210

Problem-solve diagrams ● Repetitive image defects ● Interface ports ● ECU connectors ● Formatter PCA ● Fax card ● Solenoid and motor ● Rollers ● Sensors ● Major components ● PCAs (base unit) ● Scanner and ADF ● Circuit diagram Repetitive image defects If the product output has a consistent, repetitive defect, then use Table 6-3 Repetitive image defects on page 192 to determine which part needs to be replaced based on the measured distance between the repetitions of the defect. NOTE: The following table replaces the graphical repetitive defect ruler. You can make your own ruler by using these measurements. Table 6-3 Repetitive image defects Distance between identical Dirty or damaged roller defects Solution 26.7 mm (1.05 inches) Primary charging roller Replace the print cartridge. 29.1 mm (1.14 inches) Developing cylinder Replace the print cartridge. 39.3 mm (1.55 inches) Transfer roller Replace the transfer roller. 56.2 mm (2.21 inches) Pressure roller Replace the fuser. 56.5 mm (2.22 inches) Fuser film (fuser sleeve) Replace the fuser. 192 Chapter 6 Problem solve ENWW