Troubleshooting for Halo image

Symptom

A halo may appear especially in low-temperature, low-humidity environments (See the example below)

Cause

Toner particles forming the edges of the halftone image are sucked up by the solid image due to the substantial difference in the strength of the electric field at the boundaries of the solid and halftone images.

Action

For a GW controller

Change the dpi from “2400 x 600dpi” (Default setting) to “600 x 600dpi”

For an EFI controller

Change the halftone mode from “200 Dot + Fine Text” to “175 Dot” in the “Image” tab.