Replaceable Parts

Assembly and Disassembly Guidelines

Removing the A1 Power Supply Assembly

 

1.

Remove the power supply cover by lifting it out.

 

2.

Disconnect the line input module from the chassis and power supply

 

 

assembly.

 

3.

Disconnect the cable assembly from the power supply which connects to the

 

 

A2 processor assembly.

 

4.

Unscrew the power supply assembly and lift out the power supply. (When

 

 

replacing these screws use a 9 lb/in T15 screw driver.)

 

 

WARNING

When replacing the power supply unit in the power meter ensure that

 

all earth wiring is reconnected. There are two terminals to check:

The first is the force fit connector to the power supply unit itself. It is essential that the gap between the terminal and the adjacent large capacitor is maximized. Fit the connector so that its flat side faces towards the large capacitor.

The second, a closed loop terminal bonded to the chassis with an M3.5 machine screw (use a 9 lb/in T15 screw driver).

All the protective earth wiring can be identified by the insulation color green with a yellow stripe.

Agilent E4418B/E4419B Service Guide

5-9

Page 93
Image 93
Agilent Technologies e4419b, e4418b manual Removing the A1 Power Supply Assembly