Xerox 8500DN Service Manual - Page 247

Head-to-Drum Gap (8400 Only) Print-Quality Troubleshooting These prints indicate if the gap between the Printhead and the Drum is correct. EFGHIJKLMNOPQ EFGHIJKLMNOP FGHIJKLMNOPQ EFGHIJKLMNOPQ EFGHIJKLMNOP EFGHIJKLMNOP s8500-055 Lines: The horizontal lines of the print are made up of long and short dashes. Inspect the first and last 1/2 in. (12 mm) of the black lines for the vertical distance between the short dashes and long dashes. A difference indicates the Printhead gaps at each end of the Printhead are not equal. Text: Examine each end of the band of text. Look for fuzziness or differences between the quality of the characters on the left and right ends of the print. A difference indicates the Printhead gaps at each end of the Printhead are not equal. The ends of this printer's Printhead rests on two spacers on the ends of the Drum that hold the head-to-drum gap under much tighter control than in previous solid ink printers. There is no head-to-drum adjustment possible in this printer. If the gap is suspect, check that the Printhead is correctly and completely installed. Phaser 8400/8500/8550/8560 Color Printer Service Manual 5-41