Oki MC770 MC770/780 User Guide - Troubleshooting - Page 26

Problem Description, Cause, Corrective Action, Advanced Guide

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TROUBLESHOOTING FOR COPYING Problem Description Cause Copied image has black streaks The scanning area or guides are stained. in the horizontal direction. 1 Clean them. Corrective Action 2 Copied image has white streaks or color streaks in the vertical direction. The LED print head is stained. 3 Clean the LED print head. A color original is copied in black Some color originals may be copied in black Set the color mode to [FULL COLOR]. and white even if [AUTO and white: 4 COLOR] is selected for the color • Originals with very little colored part mode. • Overall blackish originals • Originals in light 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. 5 6 7 - 26 -

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TROUBLESHOOTING FOR COPYING
- 26 -
2
1
3
4
5
6
7
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