Ricoh Pro C7200S Troubleshooting Manual page 570

9.Image Quality Problem: Lines
randomly in the margins.
Cause
If the temperature or humidity is low, remaining toner might be missed by the cleaning blade of the ITB
cleaning unit or paper transfer unit, causing streaks to appear sporadically.
Solution
1.
To identify the affected color, print three full-page, solid-fill A3 or DLT sheets for each of cyan,
yellow, magenta, and black.
2.
Check whether the problem occurs at the front or back of the paper.
<If the problem affects single color at the front of the paper>
Proceed to the solutions in "Horizontal Black (color) Streaks (1)".
<If the problem affects multiple colors at the front of the paper>
Replace the ITB cleaning unit.
<If the problem occurs at the back of the paper>
Replace the paper transfer unit.

After taking the above measures, do the color calibration adjustment of the DFE.
Vertical White Streaks (1)
A part of an image like a shape of a vertical streak in the paper feed direction is missing.
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