Canon IR2200, IR3300, IR2800 manual Copy has inadequate sharpness

CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

3.20The copy has inadequate sharpness.

Copyboard glass

1)Is there oil or the like on the copyboard glass? Is there foreign matter on the copyboard glass stay?

YES: Clean the copyboard glass.

Scanner

2)Clean the scanning lamp, reflecting plate, mirrors, and lenses. Is the problem corrected?

YES: End.

Mirror (position)

3) Is the horizontal reproduction ratio in Direct as indicated?

NO: Adjust the position of the No. 1 mirror an the No. 2 mirror.

Developing bias

4)Are the connection and the electrical continuity of the high-voltage for the developing bias normal? (The resistance of the cable for the developing

bias and the resistance between the terminal of the composite power supply PCB and the terminal on the developing assembly is about 10 kΩ.)

NO: Check the connection; and replace the cable. If the problem is still not corrected,

1.Replace the composite power supply PCB

2.Replace the DC controller PCB.

Drum unit, Transfer charging system

5)Try replacing the drum unit. Is the problem corrected? YES: End.

NO: Check the transfer charging system.

COPYRIGHT © 2001 CANON INC. CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001 4-23 T