Ricoh Pro C7500 Original Instructions Manual page 177

Cause:
This is caused by an abnormal electrical discharge in a low temperature and low humidity environment
due to the stains on the charge roller.
Occurrence conditions:
• When printing single-color dot image
• When printing is performed in a low-temperature environment (the problem is resolved as the
temperature inside the machine increases)
• When printing 20,000 sheets per day for 15 consecutive days, or when printing 30,000 sheets
per day for 8 consecutive days
• After printing approximately 30,000 sheets per day for approximately 8 consecutive days
Solution:
1. To identify the affected color, print three full-page, halftone A3 or DLT sheets for each of
cyan, magenta, and yellow.
2. Detach the charge unit of the affected color and wipe the charge roller with a well-wrung-
out damp cloth.
3. Wipe a dry, unused, lint-free cloth until no moisture remains.
4. Print the image. Has the problem been resolved?
Yes Finished!
CEZ604
Streaks
175