Miller Electric Welder operating instructions Removing Case and Measuring Input Capacitor Voltage

5-3. Removing Case and Measuring Input Capacitor Voltage

Tools Needed:

5/16 in

YSignificant DC voltage can remain on capacitors af- ter unit is Off. Always check the voltage as shown to be sure the input capacitors have discharged be- fore working on unit.

1

1

2

3

Turn Off welding power source, and disconnect input power.

1 Outside Handle Screws

To loosen top, remove two outside handle screws from both handles and all side bolts.

2Interconnect Board PC2

3Voltmeter

Measure the dc voltage across the screw terminals on PC2 as shown until voltage drops to near 0 (zero) volts.

Proceed with job inside unit. Rein- stall cover when finished.

+lead to lower right terminal, – lead to

upper right terminal

Ref. 801 914 / Ref. 801 917

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