Lexmark C750 Service Manual - Page 279

5060-00x Print line length calibration 1. Press Return until you reach the main Diagnostic Menu (the top line is blank and bottom line displays Alignment). 2. Press Menu until Print Tests is displayed and press Select. 3. Select Print Line Length Calibration. There are six alignment groups, A through F. See "Print Line Len page" on appendix page B-12 for a color sample. 4. A color band is visible through the black bars. Locate the center of the color band and determine the value. • If all the color bands for cyan, magenta, and yellow on all six groups A through F are centered between -2 and +2, you are done. • If the center is located outside the area between -2 and +2, you need to calculate the appropriate alignment adjustment for that color. Continue to the next step. 5. Calculate the Alignment Group values. Alignment Group A B or C D E F Adjustment Calculation(s) dT=(A+B+B-C+D)/3 dT=(A+B+B-C+D)/3 dT=(A+B+B-C+D)/3 dL=(E-F)*6 dL=(E-F)*6 --dZ=(B-C)*2 ----dR=F*6 6. After completing calculations for the colors that are beyond -2 and +2 range, return to the Alignment menu. See "Electronic color alignment" on page 4-58. Repair information 4-61