16
Phaser 840 and 850 Color Printers
Combination sensors and their meanings
Combinations of sensors are used by the printer to determine the type of standard
(or upper) media tray installed in the printer.
Media tray type sensing
The combinations of the three tray sensors inform the print engine what type of
media tray is installed. (The print engine does not detect the type of media
installed in the tray; it only detects the particular tray being used by the presence
of sensor flags on the side of the tray.) The tray sensors are located on the
right-side interior of the paper tray slot, mounted on I/O board right. There are
four tray types:
■
Letter (A-size).
This tray is sized for 8.5 x 11-inch (U.S.) paper as well as
low-volumes of A-size transparency film.
■
Metric Letter (A4-size).
This tray is used for 210 x 297 mm (Metric)
paper as well as low-volumes of A4-size transparency film.
■
High-volume Transparency/Label (A).
This tray supports high
volumes of U.S.-size transparency film as well as laser quality, adhesive
label stock.
■
High-volume Transparency/Label (A4).
This tray supports high
volumes of Metric-size transparency film as well as laser quality,
adhesive label stock.
Table 1 Tray switch sensor combinations
Tray type
A Paper
A4 Paper
A Transparency
A4 Transparency
Top switch
Closed
Open
Closed
Open
Middle switch
Open
Closed
Open
Closed
Bottom switch
Open
Open
Closed
Closed
The slide switch actuators on the media trays will open a switch in the
forward position and close a switch in the rear position
Summary of Contents for Phaser 840
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Page 65: ...54 Phaser 840 and 850 Color Printers ...
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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 ...