Xerox ii LINXSolid Inkjet 100 Service Manual page 106

Verifying Power Supply Operation
WARNING
3-6 ii LINX™ Solid Inkjet 100 Service Manual
Required tools:
• TORX T-20 screwdriver
• Digital multimeter (DMM)
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
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 the 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 topic, "Inspecting the power supply fuses" below.
NOTE: 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.
Inspecting The Power Supply Fuses
Three fuses (F1, F2 and F3) are mounted on the power supply.
1. Turn off the printer and remove the power cord.
2. Remove the screws securing the power supply. Disconnect the
wiring harnesses plugged into the power supply and remove
power supply.