Solution

Check the counter of PM parts around the drum (photoconductor unit), and then replace parts for which the counter has been exceeded.

In “Adjustment Settings for Skilled Operators”, execute “0502: [Execute Process Initial Setting]” (SP3-020-001).

Print the target image.

Is the printed image acceptable?

Yes: Finish

No: Go to next step

Execute [All Colors] in “0515: [Execute Developer Refreshing]” (SP3-062-001).

Print the target image.

Is the printed image acceptable?

Yes: Finish

No: Go to next step

Check the interval (pitch) of the uneven density.

Prepare a monochrome halftone image, and then print it for each color.

Pitch (Problem Unit)	Measures
40 mm (Charge Roller)	Clean the charge roller. (Wipe the charge roller with a damped cloth, and then wipe it with a dry cloth) Never use alcohol to clean. Execute “0502 [Execute Process InitialSetting]” (SP3-020-001). Execute [DEMS] in “0201 [Adjust Image Density/DEMS]” (SP3-040-001), and then check the output image.
50 mm, 25 mm (Development Roller)	Execute [DEMS] in “0201 [Adjust Image Density/DEMS]” (SP3-040-001), and then check the output image.
63 mm (Paper Transfer Roller)	Banding (63 mm intervals) Also, Refer to Uneven density: 63 mm Interval
189 mm (Drum)	Banding (189 mm intervals) Also, Refer to Uneven Density: 189 mm Interval (1), Uneven Density: 189 mm Interval (2).

Pitch

(Problem Unit)

Measures

40 mm

(Charge Roller)

Clean the charge roller. (Wipe the charge roller with a damped cloth, and then wipe it with a dry cloth)
Never use alcohol to clean.
Execute “0502 [Execute Process InitialSetting]” (SP3-020-001).
Execute [DEMS] in “0201 [Adjust Image Density/DEMS]” (SP3-040-001), and then check the output image.

50 mm, 25 mm

(Development Roller)

Execute [DEMS] in “0201 [Adjust Image Density/DEMS]” (SP3-040-001), and then check the output image.

63 mm

(Paper Transfer Roller)

189 mm

(Drum)

After taking the above measures, do the color calibration adjustment of the external controller.