Canon LBP-1760 Service Manual page 177

Problem location
Cassette feed roller
Separation roller
Feed roller
Pre-transfer roller
Primary charging roller
Photosensitive drum
Developing cylinder
Transfer charging roller
Fixing film unit
Pressure roller
Table 4-2-1
Periods of appearance of dirt, blank spots on images
Diameter
Period on
(mm)
image (mm)
24 About 75
24 About 75
15.8 About 50
15.8 About 50
12 About 38
30 About 94
16 About 50
14.9 About 47
24 About 75
20 About 63
Phenomenon
Dirt on back
Dirt Blank spots
of paper
CHAPTER 4
Poor fixing
4 - 15