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Phaser 840 and 850 Color Printers
Drum position encoder gap
This procedure ensures that the drum-position sensor assembly’s encoder wheel
rotates freely inside the gap of the drum-position sensor without the encoder
wheel’s disk touching the sensor. If the disk touches the sensor, it can abrade the
disk and result in erroneous drum position readings.
Note
Do not rotate the encoder will on the drum shaft. Altering the
position of the encoder wheel relative to the drum shaft will alter
the location that the stripper fingers (Phaser 840 printer) or rapid
release guide (Phaser 850 printer) contact the drum. Any marks
on the drum left by the stripper finger or rapid release guide in
their original position would then appear in the printed area of the
drum.
With a marker pen, draw an alignment mark on the shaft end and
the encoder wheel to help ensure their positions to each other do
not change.
1.
Phaser 840 printer only: Ensure that the retaining spring is not in the
drum-position sensor assembly’s encoder wheel groove. This ensures
that the encoder wheel is not tensioned and slides easily onto the drum
shaft.
2.
If not already mounted in place, secure the drum-position sensor
assembly onto the drum shaft and secure it to the printer frame.
3.
Through the access hole in the drum-position sensor assembly, position
the encoder gap tool on the drum shaft.
4.
Reposition the drum-position sensor assembly’s encoder wheel on the
drum shaft until it butts firmly against the encoder gap tool.
5.
Phaser 840 printer only: Holding the gap tool in place, with a small,
flatblade screwdriver, slide the encoder wheel’s retaining spring into
the encoder wheel’s groove.
6.
Remove the gap tool. Reassemble the printer and make a test print.
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 ...