Canon C850 Practical Manual page 140

When Your Printouts Look Like���
A part of the image is faint, and fine streaks
appear in the faint area�
← Feeding Direction
138 138
imagePRESS C850/C750/C650/C65
Check the Cause and Remedy Below
Cause
1� The primary voltage that transfers toner to the paper
does not match the specific characteristics of the
paper�
2� Too much toner is being used�
Remedy
• To improve this situation, adjust the value for <Adj�
Primary Transfer Voltage> to match the specific
characteristics of the paper�
→ [Preferences] → [Paper Settings] →
Press
[Paper Type Management Settings] → select the type
of paper you are using that is having this problem
→ press [Details/Edit] → [Change] for <Adj� Primary
Transfer Voltage> → adjust the voltage value of black
toward the minus end�
"Paper Type Management" > "Adjusting the
Primary Transfer Voltage" in the User's Guide
• To improve this situation, do an automatic gradation
adjustment that adjusts the total amount of toner�
→ [Adjustment/Maintenance] → [Adjust
Press
Image Quality] → [Auto Adjust Gradation]�
"Adjustment for Image Quality and Finishing
(Calibration)" > "Automatic Gradation Adjustment"
in the User's Guide