Xerox 1235N Service Guide - Page 226

c gogo c gogo c gogo c gogo c gogo c gogo c gogo c gogo c gogo c gogo c gogo c gogo c gogo c gogo c gogo c gogo Test Pattern A 600 x 600 Test Pattern A 600 x 600 Abc Defg Hijk Abc Defg Hijk Lmnop Qrstuvw XYZ 123456789 Abc Defg Hijk Lmnop Qrstuvw XYZ 123456789 c gogo c gogo c gogo c gogo c gogo c gogo c gogo Interpreting Test Pattern A This pattern consists of color blocks and bars. Use this pattern to identify defects such as deletions, banding, color misregistration, side-to-side density problems, and text problems. Look for: 1. Solid fills in the color blocks. 2. Ensure the small text is legible and not broken. 0728-17 Color Balance and Density Adjustment Test Page Repeat as needed 1. Adjust Black Density until "Current"=30% Black Halftone BLACK/GRAYSCALE -3K -2K -1K Current +1K +2K +3K 0 Decrease Increase 2. Adjust Color Density to match Black Density Squares from Step 1. Cyan+Magenta+Yellow -3CMY -2CMY -1CMY Current 0 +1CMY +2CMY +3CMY Decrease Increase 3. Adjust Color Balance to match "Current Circle" with Gray Reference. 4. Iterate between Step 2 and Step 3 as needed. Gray Reference (30% Black Halftone) 7 abcdef abcdef abcdef abcdef 12 1 6 2 Current 0 5 3 11 4 8 abcdef abcdef abcdef abcdef 9 10 0728-18 Interpreting the Color Balance and Density Adjustment Page. You use this print to assess and adjust color balance, color density and black density. Use the 30% halftones to judge the current level and decide on a preference. Look for: The Color Density and Black Density should be at approximately the same level. This is important in order to make the Color Balance adjustment. To determine the correct Color Balance compare the circle in the center of the Color Balance object marked "CURRENT" with the gray background. The background is produced using black only and the circles are produced using a combination of cyan, magenta, and yellow. The adjustment objective is for the "CURRENT" circle to be the closest gray of any of the circles when compared to the gray background. Refer to the adjustment "Adjusting color density and balance" on page 77. 212 Phaser 1235 Network Color Printer