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| TROUBLESHOOTING & REPAIR |
POWER MODULE CAPACITOR DISCHARGE PROCEDURE (CONTINUED)
FIGURE F.2 – POWER MODULE CAPACITOR TERMINAL DISCHARGE
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AMPS |
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A |
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| VOL |
LINCOLN |
| TS |
V |
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ELECTRIC |
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MULTI- |
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WELD | 350 | |
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INPUT |
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CHOPPER |
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TECHNOLOGY |
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WORK |
| ELECTRODE |
POWER
MODULE CAPACITOR TERMINALS
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PROCEDURE
1.Set the CC/CV power switch to OFF.
2.Remove input power to the machine.
WARNING
ELECTRIC SHOCK can kill.
Disconnect input power before removing the case cover and performing tests or making repairs to the machine.
3.Perform the Case Cover Assembly Removal procedure.
4.Locate the power module capacitors on the right and left sides of the tunnel assembly. See Figure F.2.
5.Using the resistor and jumper leads, CARE- FULLY discharge the capacitor terminals.
NEVER USE A SHORTING STRAP FOR THIS PURPOSE. DO NOT TOUCH THE TERMINALS WITH YOUR BARE HANDS. Repeat the procedure for the second capacitor.
6.Using the volt/ohmmeter, check the voltage across the capacitor terminals. It should be zero volts.
