Ricoh Pro C7200S Troubleshooting Manual page 622

11.Image Quality Problem: Full Page
Uneven Density
Low Image Density of Black Area
Cause
Compared to color toner, Bk toner has a lower transfer charge. Therefore, low image density is caused
by excessive transfer at the PTR unit.
This is likely to occur if:

Printing in the high temperature and high humidity condition

Printing in FC mode or FCS mode (These modes have a higher paper transfer current than B/W
mode.)
Solution
See the troubleshooting for
Horizontal White Streaks: Around Black Text
The following unexpected images occur when printing a Bk image area in the FC mode.

Low image density on an entire page

Low density on sides of a text line

Streaks on sides of a text line
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Horizontal White Streaks: Around Black Text