5-4 Phaser 6121MFP Service Manual
Print-Quality Troubleshooting
Transfer Roller
• Blank Copy or Black Copy (page 5-8)
• Light Print (page 5-10)
• White or Colored Lines and Bands in Feed Direction (page 5-14)
• White or Colored Lines and Bands in Scan Direction (page 5-16)
• Void Areas and White Spots (page 5-21)
• Incorrect Color Image Registration (page 5-25)
• Back Marking (page 5-28)
• Uneven Pitch (page 5-29)
• Uneven Density in the Feed Direction (page 5-33)
• Uneven Density in The Scan Direction (page 5-34)
Fuser
• White or Colored Lines and Bands in Feed Direction (page 5-14)
• White or Colored Lines and Bands in Scan Direction (page 5-16)
• Void Areas and White Spots (page 5-21)
• Colored Spots (page 5-23)
• Poor Fusing Performance or Offset (page 5-26)
• Brush Effect or Blurred Image (page 5-27)
• Back Marking (page 5-28)
• Uneven Pitch (page 5-29)
Repeating Defects
Repeating Defects
Maintenance Item Component Distance between Defects
Developer Assembles Magnetic (Mag) Roller
[YMCK]
34 mm (1.34 in.)
Imaging Unit Drum Charge (RTC)
Rollers
31 mm (1.22 in.)
OPC Drum Rollers 74 mm (2.91 in.)
IDT Rollers 132 mm (5.20 in.)
Transfer Roller Transfer Roller 64 mm (2.52 in.)
Fuser Heat Roller 83 mm (3.26 in.)
Belt 94 mm (3.70 in.)
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