Ricoh Pro 8300S, Troubleshooting Manual, Page: 666 / 963

2.Image Quality Problems
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Periodic changes in the speed of paper feed can cause the images to stretch, leading to unevenness in
image texture in the shape of black vertical lines. This can also occur when:
 Ambient humidity is high
 Thick paper (above Thickness 3) is used
 There are large areas of halftone coverage
Solution
1. Enter the SP mode.
2. Check the fine adjustment settings of the PTR motor.
 SP1-012-005: Motor Adj: 96 ppm PTR Motor
 SP1-013-005: Motor Adj: 111 ppm PTR Motor
 SP1-014-005: Motor Adj: 136 ppm PTR Motor
3. Check the fine adjustment settings of the transfer timing roller with SP1-006-001 to 31: Fine Adj
Trans Tmg Roll Speed (Type): (Weight)
4. Are the settings at their lower limits?
Yes Go to the next step.
No Go to Step 8.
5. Is the ambient temperature higher than 23°C (73.4°F)?
Yes Go to the next step.
No Use different paper.
6. Is it possible to lower the ambient temperature?
Yes
Lower room temperature.
No Use different paper.
7. Print the image. Is the problem resolved?
Yes Finished.
No
Repeat Steps 6 and 7. If the problem persists, go to the next step.
8. Perform a fine adjustment of the PTR motor speed (-0.1%)
9. Perform a fine adjustment of the image transfer roller speed (-0.1%).
10. Print the image. Is the problem resolved?
Yes Finished.
No Repeat Step 4.
11. If the problem persists, consult the product specialist.
Black Dots Appear on Coated Paper
Some characteristics of the paper (such as slick surface or electrical resistance) can cause black spots
and specks to appear.