Oki MC770x, User Manual

Page: 26 / 78

TROUBLESHOOTING FOR COPYING
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Copied image has black streaks
in the horizontal direction. The scanning area or guides are stained. Clean them.
Copied image has white streaks
or color streaks in the vertical
direction. The LED print head is stained. Clean the LED print head.
A color original is copied in black
and white even if [AUTO
COLOR] is selected for the color
mode. Some color originals may be copied in black
and white:
• Originals with very little colored part
• Overall blackish originals
• Originals in light color
Set the color mode to [FULL COLOR].
You can change the criterion for determining whether an
original is black and white or color.
For further information, refer to the
Advanced Guide .
A black-and-white original is
copied in color even if [AUTO
COLOR] is selected for the color
mode. Some black and white originals may be
copied in color:
• Yellowed originals
• Originals with background color
Set the color mode to [BLACK].
You can change the criterion for determining whether an
original is black and white or color.
For further information, refer to the
Advanced Guide .
Problem Description Cause Corrective Action