08/2012
3-22
WorkCentre 5021/5019
IDS11, IDS12
Initial Issue
Image Quality
IDS11 Moire Due to Interference With Copy Documents
Cause
When copying, interference with the document may cause moire. Combinations of certain
angles of screen ruling near 150lpi and Reduce/Enlarge ratio may cause moire. Precautions
should be taken during enlargement.
Action
• Reduce sharpness. Use KO to change the default value of P4000 from '2' to '1'.
– Secondary defect: Text is blurred.
• Make copies at a different Reduce/Enlarge ratio.
• Change the orientation of the document.
• If the moire occurs in Photo Mode, change to Photo & Text Mode.
IDS12 Light Background Due to Background Suppression
in Copies of Documents With Frames
For documents with dark frames along the Lead Registration Edge, the suppression value is
set so large such that areas of medium density appear extremely light.
Figure 1 Light Background Due to Background Suppression in Copies of Documents
With Frames Defect Sample (j0lj3229)
Cause
Background Suppression performs background detection of images at a distance of up to 10
mm from the Lead Registration Edge. As there were dark frames along the Lead Registration
Edge, it could not detect the original background density, which resulted in the Background
Suppression being performed based on the density of the frames.
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