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Phaser 840 and 850 Color Printers
Drum position sensor assembly (Phaser 850)
1.
Remove the left cover.
2.
Remove the top cover.
Caution
Unhook the head-tilt spring to avoid possible damage to the
printhead and drum.
3.
Disconnect the drum position encoder sensor cable at the drum position
assembly.
4.
Remove the clear plastic dust cover from the drum position assembly.
5.
Precisely mark the end of the drum shaft where it aligns with the home
reference line on the encoder so that the encoder can be reinstalled in
the same position on the shaft. This is not necessary if you are also
replacing the drum (as part of the drum/transfix assembly).
6.
Rotate the tilt gear to orient the gear’s missing teeth to the drum
position sensor assembly’s rear mounting screw.
Marking the shaft for drum home alignment
840-4-77
Mark the drum shaft where
it aligns with the home
reference mark
Drum position
encoder wheel
Summary of Contents for Phaser 840
Page 11: ...xii Phaser 840 and 850 Color Printers ...
Page 65: ...54 Phaser 840 and 850 Color Printers ...
Page 101: ...90 Phaser 840 and 850 Color Printers ...
Page 125: ...114 Phaser 840 and 850 Color Printers ...
Page 134: ...Service Guide 123 Clearing PostScript NVRAM menu item ...
Page 135: ...124 Phaser 840 and 850 Color Printers ...
Page 166: ...Service Guide 155 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 9 9 ...
Page 170: ...Service Guide 159 Figure 3 Paper path FRUs 0388 80 2 1 5 11 10 9 12 6 4 3 7 13 8 11a 11b ...
Page 172: ...Service Guide 161 Figure 4 Motor and fan FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 174: ...Service Guide 163 Figure 5 Circuit board FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 81 12 7a ...
Page 176: ...Service Guide 165 Figure 6 Solenoid and clutch FRUs 4 5 3 2 1 0388 23 ...
Page 182: ...Service Guide 171 Figure 9 High capacity PaperTray 0388 65a 1 2 ...