Xerox 8500DN Service Manual - Page 259
Timing the Drum Maintenance Camshaft, After replacing the Process Drive
UPC - 095205022063
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Timing the Drum Maintenance Camshaft Adjustments and Calibrations Caution Use either the pins that come with replacement Process Drives, or a paper clip, bent into a U shape to hold the gears in their proper position during removal and replacement. If the Process Drive is incorrectly installed, the printer could be damaged. See "Homing the Process Drive Train" on page 6-8. The Process Drive screws are torqued to 12 in. lbs. Irreversible damage to the chassis mounting bosses or the threads can result if screws are over tightened. After replacing the Process Drive, Drum Maintenance Pivot Plate or the Drum Maintenance Camshaft (or any component requiring removal of the Process Drive), the printer may experience Front Cover jams from Tray 2. The jam occurs with paper in the Preheater and C3T jam errors (strip flag timeout during transfix) recorded in Jam History. In many cases, Tray 1 (MPT) prints with no jams. These symptoms indicate that the Transfix Load Module is incorrectly timed resulting in a late arrival of the leading edge at the strip flag. The likely cause is the position of the Drum Maintenance Camshaft gear in relation to the Process Drive gear. To correct the timing problem requires removal of the Process Drive and realignment of the Drum Maintenance Camshaft. To correct the problem, follow these steps: 1. Using a flat-blade screwdriver, rotate the Drum Maintenance Camshaft clockwise to tilt the Printhead forward to its home position. This disengages the Printhead and Head Tilt Gear from the Drum Maintenance Camshaft. s8560-198 2. Pin the Process Drive gears using a paper clip or similar object to keep the gear set in its disengaged orientation during removal and replacement. 3. Remove the Process Drive (page 8-43). Phaser 84000/8500/8550/8560 Color Printer Service Manual 6-9