Fluke 5725A instruction manual Accessing the High Voltage Sense Assembly A6, 6-12

Maintenance 6

Access Procedures

Accessing the High Voltage Sense Assembly (A6) 6-12.

Warning

To avoid electrical shock, do not proceed with the following access procedure until you have completed the initial access procedure, which removes line power and checks for high voltage on the power supply. Line voltage comes directly to this assembly.

The High Voltage Sense assembly lays flat on the top of the instrument, toward the rear. Proceed as follows to access the High Voltage Sense assembly:

1.Perform the Initial Access Procedure.

2.Return the High Voltage Amplifier assembly (and the Current Amplifier assembly if it has been accessed) to the normal position, and reinstall the assembly retaining screws.

Note

When reinstalling assemblies, lower them in place squarely to make sure their connectors seat correctly in the Interconnect assembly connectors.

3.Turn over the 5725A so that the bottom is facing up.

4.Remove the bottom cover by removing the six screws on the bottom surface.

5.Remove the two jack screws from the 5700A subminiature D-connector.

6.Remove the five retaining screws on the High Voltage Sense assembly. Lift the High Voltage Sense assembly by pulling on the plastic wire-tie loops, and place the assembly in the service position.

Caution

When reinstalling the assembly, refer to Figure 6-6 and make sure cable harnesses are dressed as shown, to avoid shorting wires to the bridge rectifier heat sink or chassis.

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