Xerox 1235N Service Guide - Page 68

Repeating defect or voids on print This can usually be traced to a dent-like defect in the developer roller of the imaging drum unit in question. Measure the spacing between the spots. The distance between the repeating spots indicates the source of the problem. In some instances, the spots may be dark instead of white. They may also be shaped something other than round. s If the spots are about 115 mm (4 in.) apart, then the problem is a defect on a fuser roller. Replace the fuser. s If the spots are 57.8 mm (2.27 in.) the problem is with the transfer roller of the transfer belt unit. Replace the transfer belt unit. s 94.2 mm (3.7 in.): Imaging drum. Replace the imaging drum unit. s 49 mm (1.9 in.): Developing roller. Replace the imaging drum unit of the affected color. s 57.8 mm (2.27 in.): Toner supply roller. Replace the imaging drum unit of the affected color. s 44 mm (1.7 in.): Charging roller. Replace the imaging drum unit of the affected color. 54 Phaser 1235 Network Color Printer