Muratec MFX-C4000, Field Engineering Manual

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Alignment & Troubleshooting
Service Manual
4-16
4.1.3 Abnormal Image Printing and Defective Roller
If a mark or other printing defect occurs at regular intervals down the page, it may be caused by a damaged
or contaminated roller. Make sure the repetition interval by consulting the table below.
If the roller is dirty, try to clean it. If the problem is still occurred after cleaning the roller, replace the part
including the defective roller.
NO Roller
Period
(mm)
Phenomenon Replace part
1 Pressure Roller 91.1 Offset, Spot, Line Burst Fuser Unit
2 T2 Roller 88.0 White and Black Spot, Periodic Banding,
Rear Side Paper Dirty
Transfer Roller
3 Registration Roller
59.7
Roll Mark -
4 Pick-up Roller 72.3 Roll Mark -
5
Drive Roller 77.8 Periodic Banding, Color Registration ITB Unit
6 T1 Roller 44.0 White and Black Spot, Periodic Banding ITB Unit
7 Exit Roller 47.1 Roll Mark, Vertical Scratch -
8 OPC Drum 94.3 White and Black Spot, Periodic Banding,
Ghost, Color Registration
Imaging Unit
Charger Roller 44.0 White and Black Spot, Periodic Banding Imaging Unit
Magnetic Roller (K)
35.3
Periodic Banding Imaging Unit
Magnetic Roller
(YMC)
35.3
Periodic Banding Imaging Unit
9 Fuser Belt 127.7 Waving, Offset, Spot, Line Burst Fuser Unit
10 ITB
785.4
White and Black Spot, Periodic Banding ITB Unit