image-quality Troubleshooting
Phaser® 3500 Laser Printer Service Manual
3-3
Repeating Defects
Some image-quality problems can be associated with specific assemblies, the most common
problems and the associated assemblies are listed below. Also, see the specific image-quality
troubleshooting procedure for more information.
Print Cartridge
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Streaks
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Fine Lines
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Banding in Process Direction
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Uneven Density
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Voids
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Repeating Defects
Transfer Roller
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Toner on the back side of the printed page (simplex mode)
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Light Prints
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Repeating Defects
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Spots on Image
Fuser
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Hot or Cold Offsetting
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Repeating Defects
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Voids
Repeating Defects Measurement Table
Assembly
Component
Distance between
Defects
Typical Defect
Print Cartridge
Developer Roller
50 mm (1.97 in.)
Horizontal image band
Drum
94 mm (3.70 in.)
White spots on black image
or black spots on white
Drum Charge Rollers
38 mm (1.50 in.)
Black spots
Supply Roller
42 mm (1.65 in.)
Light or dark horizontal
image bands
Transfer Roller
Transfer Roller
56 mm (2.20 in.)
Image ghost
Fuser Assembly
Heat Roller
126 mm (4.96 in.)
Black spots and image
ghost
Pressure Roller
126 mm (4.96 in.)
Black spots on back