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173
E
Line Voltage Conversion
WARNING: Shock Hazard. Operating personnel must not remove instrument covers.
Component replacement and internal adjustments must be made only by qualified
service personnel.
Open the Unit
♦ Turn off ac power and disconnect the power cord from the unit.
♦ Use a #15 Torx drive and remove the two screws on the bottom of the unit. If your unit has feet, you
will need to remove one of the feet to access the screw.
♦ Use a #15 Torx drive and loosen the two screws on the rear bezel and remove the bezel.
♦ Slide the cover toward the back of the unit and remove it.
Configure the Power Transformer
♦ Locate the ac input wiring harness on the left side of the transformer
♦ Use a needle nose pliers and connect the ac input wiring harness according to the information in
figure E-1 on the following page.
Install the Correct Line Fuse
♦ Install the correct line fuse. The fuse is located on the bottom pc board directly behind the ac line
switch and is labeled F301.
For 100/120 Vac operation: 3.15 AT (time delay); part number 2110-0638
For 220/230 Vac operation: 1.6 AT (time delay); part number 2110-0773
♦ Mark the voltage setting that the unit has been set to on the rear panel label.
Close the Unit
♦ Slide the cover over the unit toward the front.
♦ Place the bezel on the rear of the unit and tighten the two screws using a #15 Torx drive.
♦ Replace the two screws on the bottom of the unit using a #15 Torx drive. Remember to replace the
foot if you previously removed it to access the screw.
♦ Reconnect the power cord and turn on the unit.