Solution

In the “Adjustment Settings for Skilled Operators” menu, select “0506: [Smooth Fusing Belt]”.

Execute “02: [For Uneven Gloss (Short Time)]” (SP1-133-111).

Print the target image (1 sheet).

Is the printed image acceptable?

Yes: Finish

No: Repeat executing “02: [For Uneven Gloss (Short Time)]”.