.A complete Parts List is available at www.MillerWelds.com
6-3. Measuring Input Capacitor Voltage
3
1
| ! | Significant DC voltage can | |
|
| remain on capacitors after | |
|
| unit is Off. Always check ca- | |
|
| pacitors as shown to be sure | |
|
| they have discharged before | |
|
| working on unit. | |
3 | Turn Off welding power source and | ||
disconnect input power. | |||
| |||
| Remove case. | ||
| 1 | Input Capacitor C3 Terminals | |
2 | 2 | Input Capacitor C4 Terminals | |
| 3 | Voltmeter | |
| Check input capacitors as shown. | ||
| Measure the dc voltage across the | ||
| positive (+) and negative (−) | ||
| terminals until voltage drops to near | ||
| 0 (zero) volts. | ||
| Proceed with job inside unit. | ||
| Reinstall case when finished. | ||
Tools Needed:
5/16 in
221
