Ricoh MP C6502SP Field Service Manual page 1386

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5. Troubleshooting

White spots in low-temperature, low-

humidity environment

White spots in Winter Environment

White spots with toner cores

White, fish-shape stains

Small granular toner fixation

Troubleshooting for Color spots (189mm/40mm pitch)

Colored spots appear at 40mm or 189mm intervals in solid image areas (black or white) or

throughout the entire image on the single-color Independent Pattern (1-dot), when printing onto A3

or SRA3 sheets.

• Scratches or foreign particles on the OPC surface

• Scratches or foreign particles on the charge rollers

Do the following:

1. Load A3 or SRA3 paper in the tray.

2. In SP2-1090-003, set the test pattern to solid white, solid black, and single color

Independent Pattern 1-dot.

3. Print out the pattern and check the interval of the spots.

If the symptom occurs at 189mm intervals:

• If there are any scratches on the OPC, replace the OPC.

• If there are no scratches, wipe the OPC surface with a damp cloth and then with a dry

White spots may appear in low-temperature, low-humidity

(10 °C/15 %) environments.

White spots appear in an area ranging 40mm from the

leading edge.

White spots or black spots may appear when printing

halftone images in low-temperature, low-humidity

environments immediately after replacing the developer.

White spots with toner cores may appear inside solid

White points or short lines may appear in the feed direction

in 189 mm pitch.

0.5-1mm or trailing toner fixation may appear in halftone

Chapters

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