Service Guide
15
Caution
The actual position of some printer assemblies, such as the
printhead or the cap/wipe/purge assembly, cannot be ascertained
at all times. The printer records, in NVRAM, where it last
positioned such assemblies each time it moves them. If, after
power-down or a power interruption, the assemblies are manually
repositioned, the printer erroneously assumes that the assemblies
are in the position it last left them. This assumption can result in
damage to the printer when it tries to position the assemblies. For
example, the printhead could be tilted forward and crash into the
raised cap/wipe/purge assembly.
Before turning on the printer, ensure the printhead is tilted
forward, centered in front of the drum and the cap/wipe/purge
assembly is in the retracted, home position. The tilt cam gear
should be disengaged from the gear drive train.
Electric clutches and solenoids are used by the printer to engage rollers as needed
to move paper through the printer as well as start some print processes.
Solenoids and clutches on the print engine
Cap/wipe/purge
clutch
Transfix
solenoid
Drum maintenance
cam clutch
Upper feed-
roller clutch
Pick clutch
Air valve
solenoid
0388-08
Содержание Phaser 840
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Страница 134: ...Service Guide 123 Clearing PostScript NVRAM menu item ...
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Страница 166: ...Service Guide 155 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 9 9 ...
Страница 168: ...Service Guide 157 Figure 2 Imaging FRUs 4 2 3 6 5 7 8 11 9 13 15 17 16 12 14 1 2 0388 79 18 10 19 ...
Страница 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 ...
Страница 172: ...Service Guide 161 Figure 4 Motor and fan FRUs 0388 14 7 4 3 5 6 2 1 ...
Страница 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 ...
Страница 176: ...Service Guide 165 Figure 6 Solenoid and clutch FRUs 4 5 3 2 1 0388 23 ...
Страница 178: ...Service Guide 167 Figure 7 Gear and belt FRUs 0388 22 9 7 3 4 2 13 15 11 5 10 6 14 12 16 17 18 19 1 8 ...
Страница 180: ...Service Guide 169 Figure 8 Sensor and flag FRUs 0388 15 7 3 2 1 4 5 9 8 10 16 12 17 14 18 19 6 11 13 15 ...
Страница 182: ...Service Guide 171 Figure 9 High capacity PaperTray 0388 65a 1 2 ...
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