The special properties of the paper (slick surface, electrical resistance, etc.) can cause black spots and specks to appear.
Cause:
Ambient conditions and special paper characteristics (slick surface, electrical resistance, etc.) can cause too much charge in the electrical field and cause dots to appear. This effect can occur when:
- High temperature, low humidity
- Coated paper is used
- Paper is thin (lower than 3 the scale)
- Halftones are used in fill areas
- Please remember that before paper can be used, it requires setting by the operator, especially if adjustments for a different type of paper (custom paper) are used.
Solution
- In Advanced Settings for the custom paper in use, check the present value in Image Transfer Voltage and PTR voltage settings.
- SP2-817-001 to 100: ITB Voltage Custom Paper 001 to 100
- SP2-811-001 to 100: PTR Current: Side1 Custom Paper 001 to 100
Is paper transfer current setting 140 or less?
Yes
Raise the paper transfer current 10 points.
No
Go to Step 4.
Print the image. Is the problem resolved?
Yes
Finished!
No
Repeat Steps 2, 3. If the problem persists, go to the next step.
- Set image transfer current to 140.
Is the absolute value of the paper transfer current less than 50?
Yes
Use different paper.
No
Go to the next step.
- Lower the absolute value of the paper transfer current by 10 points.
Print the image. Is the problem resolved?
Yes
Finished!
No
Repeat from Step 2.
If the problem persists, consult the product specialist.
- Adjustment of the image transfer current can cause white spots in images, so adjust carefully. If white spots appear, choose the best print from among the samples and apply the settings used for this test print.
- Adjustment of the paper transfer current can cause image density to fade, so adjust carefully. If images fade, choose the best print from among the samples and apply the settings used for this test print.