60
Phaser 840 and 850 Color Printers
Verifying power supply operation
The power supply is divided into two sections: the AC section used for heaters
and the DC section for control logic, printhead drivers and motors. Verifying the
power supply involves three steps:
■
Checking for proper AC voltage.
■
Inspecting the power supply fuses.
■
Testing for a shorted motor or solenoid driver, which shuts down the
power supply.
Measuring power supply voltages
Warning
AC line voltages are present on the power supply and possibly in the
printer, via the heaters, while the printer is plugged into an AC outlet,
even if the power switch is off.
1.
Turn off the printer and unplug it from its power outlet.
2.
AC Input:
With a DMM set to measure AC voltages, measure the
power being supplied to the printer; it should measure between 87 to
128 VAC (115 VAC nominal) or 174 to 250 VAC (220 VAC nominal).
3.
Proceed to the step, “Inspecting the power supply fuses” below.
If a heater shorts, F2 or F3 opens. The power supply does NOT shut
down, however, a
Service Required
error code is displayed on the
front panel.
Required tools
■
TORX T-20
screwdriver
■
Digital multi-meter (DMM)
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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