8R1U-01Y
White Spots Caused by Insufficient Toner Fixing Appear
Temperature for fixing toner does not match the specific characteristics of the paper. Adjust the gloss value toward the plus end.
← Feeding Direction
Remedy
To improve this situation, adjust the value for <Adjust Gloss> to match the specific characteristics of the paper.
Press 
→ <Preferences> → <Paper Settings> → <Paper Type Management Settings> → select the type of paper you are using that is having this problem → press <Details/Edit> → <Change> for <Adjust Gloss> → adjust the value for Gloss toward the minus end.
→ <Preferences> → <Paper Settings> → <Paper Type Management Settings> → select the type of paper you are using that is having this problem → press <Details/Edit> → <Change> for <Adjust Gloss> → adjust the value for Gloss toward the minus end.
"Managing the Machine" > "Paper Type Management Settings" in the User's Guide > see the subsection "Adjust Gloss"