Replaceable Parts
Assembly and Disassembly Guidelines
5-8 HP EPM-441A/442A Service Guide
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 and 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.
4402serv.book Page 8 Monday, March 11, 2002 11:34 AM
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