Canon LBP-1210 Service Manual page 175

is worn.
2. Dirty or worn feed roller.
Action: Clean the feed roller. Replace the roller if the dirt cannot be removed or the roller
is worn.
3. Defective top of page sensing lever.
Action: Replace the lever if it does not move smoothly or is damaged.
Periodical dirt and spots appearing on the image
Susceptible location
Transfer charging roller
Primary charging roller
Photosensitive drum
Developing cylinder
Fixing film unit
Pressure roller
Table 4-2-2
Diameter Period of the image
(mm) (mm)
Approx. 14.4 Approx. 45.2
Approx. 12 Approx. 37.7
Approx. 24 Approx. 75.4
Approx. 12 Approx. 37.7
Approx. 18 Approx. 56.5
Approx. 20 Approx. 62.8
Phenomenon
Blank
Dirt on back
Dirt
spots
of paper
CHAPTER 4
Poor fixing
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