Canon C850 Practical Manual page 137

When Your Printouts Look Like���
Tiny white spots that look like bubbles
appear� (Type B)
Tiny white spots appear� (Type B)
The definition of the printout is low�
Problems with Printouts That Look Like the Following Images
Check the Cause and Remedy Below
Cause
The secondary voltage that transfers toner to the paper
does not match the specific characteristics of the paper�
Remedy
To improve this situation, adjust the value for <Adj�
Secondary Transfer Volt�> to match the specific
characteristics of the paper� There are two types of
problems: type A and type B� Adjust the value according
to the problem with your printout�
→ [Preferences] → [Paper Settings] → [Paper
Press
Type Management Settings] → select the type of paper
you are using that is having this problem → press
[Details/Edit] → [Change] for <Adj� Secondary Transfer
Volt�> → adjust the voltage value� For type A, adjust the
voltage value toward the plus end� For type B, adjust the
voltage value toward the minus end�
"Paper Type Management" > "Adjusting the
Secondary Transfer Voltage" in the User's Guide
Cause
The dither settings are not appropriate for the image
being printed�
Remedy
To improve this situation, adjust the dither settings to
increase the space between halftone dots�
→ [Adjustment/Maintenance] → [Adjust Image
Press
Quality] → [Dither Settings] → decrease the setting
value for <Gradation> and <Resolution>�
"Adjustment for Image Quality and Finishing
(Calibration)" > "Dither Settings" in the User's Guide
imagePRESS C850/C750/C650/C65
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