# B30 RGB PATTERN

#Overview

Print patterns for checking the banding level of each color.

#Paper and feed tray

• Paper size: A4, Letter

• Paper type: Plain paper, Business plain paper

• Paper feed tray: Paper Cassette (C1) to paper cassette (C3), Rear ASF

#Adjustment pattern

#Criteria

Visually check the banding levels of the check pattern to confirm that there is no problem.

#Work Procedure

1. Start the printer in the service mode.

   • Service mode startup

2. Select “B30 RGB Pattern” refer to “How to select an Adjustment item”.

   • HOW TO SELECT AN ADJUSTMENT ITEM

3. Load paper into the paper feed tray.

4. Confirm the current setting and print the adjustment pattern.
   When changing the print setting, select and change the item following the instruction on the screen.
   

5. Check the check patterns. If not good, refer to the following table and take the corresponding measure.

   No.	Symptom	Suspected cause	Measure
   1	Multiple white bands are occurring.	Nozzles missing	Perform head cleaning.
   2	The banding level differs depending on the color.	LUT_POL adjustment value is incorrect.	Perform user adjustment (LUT_POL adjustment).
   3	White banding or black banding is occurring over the entire pattern.	Adjustment is incorrect.	Perform band feed adjustment again.
   4	White banding or black banding is occurring at the top and middle of the pattern.	Adjustment is incorrect.	Perform band feed adjustment again.
   5	White banding or black banding is occurring at the bottom edge.	Adjustment is incorrect.	Perform band feed adjustment again.