Canon IR2200, IR3300, IR2800 manual Copy has a white spot horizontal

CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

3.12The copy has a white spot (horizontal).

Exposure system

1)Generate a halftone test print in service mode. Enter ‘4’ to the following: COPIER>PG>TYPE. Does the output image have a white spot?

NO: Go to step 4.

Developing assembly

2)Does the problem occur at intervals of about 35 mm? YES:

•Clean the developing block members.

•Dry wipe the surface of the developing cylinder.

•If a scratch is found on the surface of the developing cylinder, re- place the developing cylinder.

Drum unit

3)Does the problem occur at intervals of about 94 mm? YES:

•Clean the drum.

•If a scratch is found on the drum, replace the drum unit.

Paper

4) Try paper fresh out of package.

YES: The paper may be moist. Advise the user on the correct method of storing paper.

Transfer charging roller, Developing bias

5)Is there a white spot on the photosensitive drum during copying opera- tion?

NO: Check the transfer charging roller for leakage.

YES: Check the developing bias.

COPYRIGHT © 2001 CANON INC. CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001 4-17 T