10.Image Quality Problem: Spots
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10. Image Quality Problem: Spots
Spots
Black (color) Spots (1)
Black spots occur at 189mm or 40mm interval.
Cause
If black spots occur at 189mm interval, this problem is caused by a damaged or dirty drum.
If black spots occur at 40mm interval, this problem is caused by a damaged or dirty charge roller.
Solution
Do test printing and check the interval of color spots. There are two measures for the interval of color
spots.
Test Printing and Checking Interval of Color Spots
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