Canon LBP-2000 Service Manual page 164

2 - 6 . Soiled back
<Possible Causes>
1 . The paper is soiled.
Action: Replace the paper with paper fresh out of package. At the same time, advise the user
on the correct method of storing paper.
2 . The setting and the type of paper used do not match.
Action: Check the selected fixing mode, and change it to suit the type of paper used.
3 . There is dirt at specific intervals (cassette pickup roller, manual fee pickup roller, registration
roller, transfer charging roller, delivery roller).
Action: Identify the soiled roller by referring to Tale 4-2-1, and clean it. If the dirt cannot be
removed, replace the roller.
4 . The fixing assembly is faulty.
Action: Replace the fixing assembly.
2 - 7 . Black vertical lines
<Possible Causes>
1 . There is a scratch in the peripheral direction of the photosensitive drum.
Action: Replace the cartridge.
2 . There is a scratch on the fixing roller.
Action: Remove the cause of the scratch, and replace the fixing assembly.
2 - 8 . Black horizontal lines
<Possible Causes>
1 . There is a scratch across the photosensitive drum.
Action: Replace the cartridge.
2 . The fixing roller is soiled, deformed, or worn.
Action: Replace the fixing assembly.
2 - 9 . Soiled face
<Possible Causes>
1 . The paper is soiled.
Action: Replace the paper with paper fresh out of package. At the same time, advise the user
on the correct method of storing paper.
2 . The delivery roller is soiled.
Action: Clean the soiled area. If the dirt cannot be removed, replace the delivery roller.
3 . There is dirt at specific intervals (separation roller, transfer charging roller, fixing roller, car-
tridge).
Action: Identify the soiled roller by referring to Table 4-2-1, and clean it. If the dirt cannot be
removed, replace the roller.
CHAPTER 4
4 - 13