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Service Guide
13
Sensors in the printer provide information to the main board to determine the
state of the printer. The printer monitors the positions of some of the movable
assemblies, such as the drum, as well as the temperature of many other
assemblies, such as the printhead, paper preheater and the drum.
Note
Unlike the Phaser 840 printer, the Phaser 850 printer does not
have a separate drum-home position sensor.
Sensors and switches on the right side of the print engine
0388-07
Maintenance
blade position
sensor
Paper-empty
sensor
Cap/wipe/purge
home sensor
A4-size media
sensor
Ink-load
cover sensor
Ink-stick-
low sensor
Ink-stick-
out sensor
Exit / tray-full
sensor
Top cover
switch
Front cover
switch
A-size media
sensor
Tray type
sensors
Paper-pick
sensor
Hand-feed
sensor
Preheater
entry/left
edge sensor
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 ...