The Output Has Uneven Density (Darker At The Front); The Output Has Uneven Density (Lighter At The Front) - Canon iR105 Service Manual

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CHAPTER 6 TROUBLESHOOTING

3.3.4 The output has uneven density (darker at the front)

1) Perform the Image Adjustment Basic Procedure. Is the problem

Development assembly (position)

2) Are the rolls of the developing assembly in firm contact with the

Scanner (dirt)

3) Clean the scanning lamp, reflecting plate, side reflecting plate, mir-

Pre-exposure lamp

4) Does the pre-exposure lamp ON evenly during copying operation?

Developing assembly

Charging assembly, Copy paper

5) Is the developing cylinder coated with an even layer of toner?

YES: [1] Clean all charging wires once again, and check the position of

photosensitive drum?

Check the developing assembly locking unit.

rors, lenses, and dust-proofing glass. Is the problem corrected?

[1] Replace the pre-exposure lamp.

[2] Replace the DC controller PCB.

[1] Clean the edge of the blade of the developing assembly (by

dry wiping).

[2] Clean the surface of the developing cylinder.

[3] Check to see if the toner inside the developing assembly is

level or not.

each once again.

[2] Try replacing the copy paper.

[3] Check the nip of the fixing roller.

2000 2000 2000 2000

CANON iR105 REV.0 JULY 2001

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