Mottling occurs in solid-filled areas.
Normal
Mottled
Cause:
The transfer electric field in the indentations in the paper is weak, causing a decrease in image transfer. This may occur when:
- Using paper with a rough surface
- Continuously printing an image that consumes little toner
- Printing at high temperature or humidity
Solution:
Before you perform the solution procedure, make sure that thePM parts have not reached their expiration period. If the PM parts have reached the end of their service life, replace them.
Check to see if any PM parts have exceeded the expiration date.
Yes
Replace parts that have exceeded service life.
No
Go to the next step.
Print the image. Is the problem resolved?
Yes
Finished!
No
Go to the next step.
- On the machine operation panel: Adjustment Settings for Skilled Operators > Image Quality > Adjust Image Density > Image Density Adjustment: Manual Execute. (SP3-011-002: Manual ProCon :Ex Density Adjustment)
Print the image. Is the problem resolved?
Yes
Finished!
No
Go to the next step.
Print 100 full-page, solid-fill A4 or LT sheets. Is the problem resolved?
Yes
Finished!
No
Reload with paper that is dry.
Print the image. Is the problem resolved?
Yes
Finished!
No
Replace the paper with smoother paper.
Print the image. Is the problem resolved?
Yes
Finished!
No
Go to the next step.
Is the paper smaller than A4 SEF (210 mm)?
Yes
Go to the next step.
No
Go to Step 10.
Use wider paper. Is the problem resolved?
Yes
Do the procedure in the next section: “Rough Images with Paper Smaller Than A4 SEF (210 mm)”
No
Go to the next step.
- In Advanced Settings for the custom paper in use, select Adjust Toner Adhesion and check the setting. (SP3-921-001 to 100: Procon Target M/A Custom Paper 1 to 100)
Is the setting for coverage (M/A) at the upper limit?
Yes
Use different paper.
No
Raise the setting one point.
Print the image. Is the problem resolved?
Yes
Finished!
No
Repeat Steps 11, 12. If this does not solve the problem, do the next step.
Open the SC log. Is there a logged SC code?
Yes
If either of the following SC codes were logged, do the procedure to solve the problem:
- SC443-00: Image Transfer Roller Error
- SC453-00: Paper Transfer Roller Error
No
Go to Step 15
Print the image. Is the problem resolved?
Yes
Finished!
No
Go to the next step.
Is it possible to raise the toner density setting?
Yes
In Advanced Settings for the paper in use, select Adjust Toner Adhesion, and raise the setting (+). (SP3-921-001 to 100: Procon Target M/A Custom Paper 1 to 100
No
Consult the product specialist.
Print the image. Is the problem resolved?
Yes
Finished!
No
Consult the product specialist.
- Adjust the toner adhesion setting carefully. Raising the toner adhesion setting increases the amount of toner consumption and reduces toner yield.