Xerox Phaser 840 Service Manual page 211

Remove the three screws securing the drum position sensor assembly housing to the
7.
print engine. Insert the gap tool to hold the encoder wheel in position. Slide the
assembly off the drum shaft. If necessary, use the small flat-blade screwdriver to push
the encoder disk hub along the shaft as you remove the assembly.
Fig 7-14 Removing the drum position sensor assembly
(Phaser 850 printer)
Reverse these steps to reinstall the drum position sensor assembly. Use the encoder wheel
gap tool to space the encoder wheel to the drum position sensor.
Drum position
sensor
assembly
Screws
Removal and Replacement Procedures
840-4-78
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