CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

3.23The copy has a block/white dot after replacement of the drum unit.

1)Execute the following in service mode: FUNCTION>DPC>D- GAMMA. Then, make copies of the NA-3 Chart. Is the copy image nor- mal?

YES: End.

Drum unit

2)Set the following to ‘1’: OPTION>BODY>PRIAC-SW. Then, make copies of the NA-3 Chart. Is the copy image normal?

YES: End.

NO: Replace the drum unit.

3.24The copy has a black line (stream reading).

Reading glass, Dirt

1)Does the problem occur on the same position on all copies? YES: Check the reading glass for dirt and a scratch.

NO: Paper lint (droppings) can be suspected. Clean the ADF roller, original path, and reading glass.

COPYRIGHT © 2001 CANON INC.

CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001

4-27 T

Page 459
Image 459
Canon IR3300, IR2800, IR2200 manual Copy has a black line stream reading