Image Defects; Image Defect Examples; Diameter Of Rollers - Brother mfc8440 Service Manual
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Also See for mfc8440:
- User manual (426 pages) ,
- Software user's manual (183 pages) ,
- Quick setup manual (52 pages)
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CHAPTER 6 TROUBLESHOOTING
8.
IMAGE DEFECTS
8.1
Image Defect Examples
I-1 Light
I-6 Black vertical
I-10 White horizontal
streaks
I-15 White spots
I-20 Downward fogging
of solid black
8.2
Diameter of Rollers
The diameter of each roller and the pitch which appears in the image are listed below;
No.
1
2
3
4
5
6
7
I-2 Dark
I-2 Dark
I-6 Black vertical
streaks
streaks
I-11 Faulty
registration
I-16 Black spots
I-21 Horizontal lines
Parts Name
First Paper Feed Roller
Paper Feed Roller
Transfer Roller
Photosensitive Drum
Heat Roller
Pressure Roller
Development Roller
I-3 Completely blank
I-4 All black
I-7 Black horizontal
I-8 Black vertical
stripes
streaks
I-13 Image distortion
I-12 Poor fixing
I-18 Gray background
I-17 Black band
I-23 Ghost
I-22 Light rain
Fig. 6-14
Diameter (The pitch which
appears in the image)
φ 13.6 mm (42.7 mm)
φ 14.0 mm (44.0 mm)
φ 15.20 mm (47.7 mm)
φ 29.97 mm (94.1 mm)
φ 25.0 mm (78.5 mm)
φ 25.0 mm (78.5 mm)
φ 20.0 mm (39.0 mm)
6-34
I-5 Dirt on back of paper
I-9 White vertical
streaks
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I-14 Faint print
I-19 Hollow print
I-24 Toner specks
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