E - Line Voltage Conversion; Open The Unit; Configure The Power Transformer; Install The Correct Line Fuse - Agilent Technologies 66111A User Manual

Fast transient dc source/mobile communications dc source
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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 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.
E
175

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