Agilent Technologies 6811B, 6813B, 6812B manual Line Voltage Conversion, Open the Unit

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Line Voltage Conversion

WARNING: Shock Hazard Hazardous voltage can remain inside the unit even after it has been turned off. This procedure should only be done by qualified electronics service personnel.

Open the Unit

♦Turn off the ac power to the unit and disconnect the power cord from the power outlet.

♦Remove the four screws that secure the two carrying straps and outer cover (use a T25 Torx drive).

♦Slightly spread the bottom rear of the cover and pull it back to remove it from the front panel.

♦Observe the two LEDs that are visible in the cutouts on each side of the unit. If either LED is on, there is hazardous voltage inside the unit. Wait until the LED goes out before proceeding (this may take several minutes).

Check the Jumper Wire (Model Agilent 6811B/6812B only)

♦Locate the line voltage jumper wire in the cutout at the side of the unit by the line cord (see Figure D-1).

♦For 100 V or 120 V operation, install the jumper on the lug labeled:100/120.

For 200 V, 208 V or 230 V operation, install the jumper on the lug labeled: 200/220.

Check the Line Jumpers (all Models)

♦Locate the line jumpers in the cutout at the side of the unit by the on/off switch.

♦Configure the jumpers according to the line voltage shown in the accompanying label. When configuring a unit for 208 V, use the jumper settings shown for 200 V.

Check the Power Transformer Connector (all Models)

NOTE: This procedure is only required if you are changing the input voltage between 100 V and 120 V or between 200/208 V and 230 V.

♦Remove the screws securing the inner cover (use a T15 Torx drive).

♦Remove the inner cover.

♦Remove the screws securing the pc board behind the front panel (use a T15 Torx drive).

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