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Service Guide
11
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.
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 46: ...36 Phaser 840 Color Printer ...
Page 95: ...Service Guide 85 Clearing PostScript NVRAM menu item ...
Page 96: ...86 Phaser 840 Color Printer ...
Page 121: ...Service Guide 111 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 ...
Page 125: ...Service Guide 115 Figure 3 Paper path FRUs 0388 16 2 1 5 11 10 9 12 6 4 3 7 13 8 ...
Page 127: ...Service Guide 117 Figure 4 Motors and fans FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 129: ...Service Guide 119 Figure 5 Circuit boards FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 13 12 ...
Page 131: ...Service Guide 121 Figure 6 Solenoids and clutches FRUs 4 5 3 2 1 0388 23 ...
Page 137: ...Service Guide 127 Figure 9 High capacity PaperTray 0388 65a 1 2 ...
Page 142: ...132 Phaser 840 Color Printer ...
Page 154: ...144 Phaser 840 Color Printer ...