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
How to Measure the Periodic Interval of Color Spots
Use a ruler to measure the periodic interval of color spots on the same line in the paper feed direction.
[A]: Spots Interval for Approx. 189mm
Do not use ethanol or other organic solvents when wiping the drum. Using such solvents may damage the drum.
Follow the specified procedures when attaching the drum to the machine after cleaning or replacement. Refer to the procedures in Chapter 4 “Replacement and Adjustment” of the field service manual.
[B]: Spots Interval for Approx. 40mm
After taking the above measures, do the color calibration adjustment of the external controller.
For the replacement procedures of the charge roller or charger unit, refer to Chapter 4 “Replacement and Adjustment” in the field service manual.
Do not use ethanol or other organic solvents when wiping the charge roller. Using such solvents may damage the roller.
