Phaser 8400/8500/8550/8560 Color Printer Service Manual 5-43Print-Quality TroubleshootingManuf. Skew MarginsThis print consists of an image used by manufacturing to gauge skew andmargin on 2 sided prints.To measure skew, measure between the edge of the paper and the magentaframe should be within tolerance along the entire length of the top of thepaper. For example, the measurement on the top left side of the sheet shouldbe the same as the measurement on the top right side of the sheet (withintolerance).To calculate skew, measure the margin at the leading edge of each corner,then take the difference between them. For example, if the margin at the rightleading edge corner is 5.1 mm, and the margin at the left leading edge corneris 4.9 mm, then the skew is (5.1 - 4.9) = 0.2 mm. Skew tolerances are:■ All sizes except envelopes and custom sizes: 0.0 +/- 0.89 mm■ Envelopes: 0.0 +/- 1.04 mm■ Custom media: evaluate with the following formula: Skew Spec (mm) =998.4*(width-12.5)^(-1.02), where width is in millimeters.To measure margin, measure from the magenta frame to the edge of thepaper at the midpoint on the top and left-edge margin (right side of paper, leftside of printer). Margin tolerance is the margin +/- 2. See the Media MarginSpecification in the Appendix.NoteMeasurements for skew and margin for Sides 1 and 2 may not matchCheck: The media must be supported for the tray. The side and rear guidesmust be adjusted to the size of the paper to ensure correct deskewing.If you have skew on simplex prints in Trays 2, 3, or 4, check for a worn takeaway roller or pick roller; in Tray 1, check for a worn pick roller. This test printuses the tray selected in Paper Source on the Paper Handling Menu.s8400-1451 2 3MMs8400-2011 2 3MM1 2 3MM
