Open the Unit, Close the Unit, 175 | Agilent Technologies 66111A, D

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.

175 66111A, 66309B, 66311B, D specifications

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