Ricoh Pro C7500 Original Instructions Manual page 162

5. Image Quality Problem: Lines/Streaks
Cause:
Vibration of the intermediate transfer belt due to paper transfer shock jitter occurs, resulting in image
transfer fluctuation and one or more horizontal bands.
• This occurs on the second and later sheets due to the intermediate transfer belt vibration made
when the leading edge of the paper enters the paper transfer nip and when the trailing edge of the
paper exits from the paper transfer nip (except for banner sheets).
• The problem occurs in various areas, depending on the paper length, print speed (PPM), and
color.
• This is prone to occur in black-and-white mode and S only mode.
• This problem becomes prominent on a single-color "4by4" image.
When the positions of the K and S toners have been switched, this occurs in black-and-white mode.
Black toner is positioned in "5st" and farther away from the paper transfer unit than in normal mode, so
the effect of vibration of the intermediate transfer belt is more prone to be apparent.
Solutions:
1. Check the print job properties when shock jitter occurs.
The color affected with the shock jitter was
used for printing 1000 or more sheets of
images covering a low image area
Other than the above
2. In the [Machine: Maintenance] group on the [Operator Adjust.] menu, execute 0506:
[Execute Developer Refreshing] to execute Developer Refreshing for the color with the
problem.
• Performing this once may not be sufficient to achieve the desired effect. As required, repeat
Step 2 up to 5 times.
3. Print the image. Has the problem been resolved?
Yes
No
4. Check if the positions of the K and S toners have been switched and whether the shock
jitter occurred in black-and-white mode.
Yes
160
Finished!
Go to the next step.
Go to the next step.
Go to the next step.
Proceed to Step 4.