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| TROUBLESHOOTING & REPAIR |
AMPS/VOLTS DIGITAL METER AND POTENTIOMETER
REMOVAL AND REPLACEMENT (CONTINUED)
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7.Carefully remove the Amps or Volts Digital Meter molex plug from the Weld Control PC Board. Press and hold the keeper on the plug as you remove it.
8.Using the 5/16" nut driver, remove the two nuts and flat washers holding the Amps or Volts Digital Meter in place.
9.Using the phillips screw driver, remove the two screws holding the bezel and lens (and the meter) to the front panel.
10.Carefully remove the Amps or Volts Digital Meter. Do not damage the gasket.
REPLACEMENT PROCEDURE
1.Fit the meter into position, adjustable slot side down. Verify that the gasket is in place.
2.Insert the two phillips screws through the bezel, and with the lens in place, tighten the screws into the meter.
3.Install the flat washers and 5/16" nuts onto the screws and tighten them.
4.Attach the molex plug to the Weld Control PC Board. See the Wiring Diagram.
5.Attach the rear panel with seven 5/16" screws.
6.Perform the Case Front Assembly Replacement procedure.
7.Perform the Case Cover Assembly Replacement procedure.
OUTPUT CONTROL POTENTIOMETER REMOVAL PROCEDURE
Refer to Figure F.9.
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.Perform the Power Capacitor Discharge procedure.
5.Perform the Case Front Assembly Removal procedure.
6.Using the 5/16" nut driver, remove the seven screws from the control box rear panel.
7.Carefully remove the potentiometer molex plug from the Weld Control PC Board. Press and hold the keeper on the plug as you remove it.
8.Using the diagonal cutters, cut the cable tie holding the potentiometer to the back panel.
9.Using the allen wrench, remove the set screw holding the potentiometer knob to the shaft.
10.Remove the knob, shaft seal, and spacer. Pull the potentiometer out from the panel.
REPLACEMENT PROCEDURE
1.Fit the potentiometer into position, verifying proper orientation. Install a new cable tie.
2.Install the spacer, shaft seal, and knob.
3.Tighten the knob onto the shaft with the set screw.
4.Attach the molex plug to the Weld Control PC Board. See the Wiring Diagram.
5.Attach the rear panel with seven 5/16" screws.
6.Perform the Case Front Assembly Replacement procedure.
7.Perform the Case Cover Assembly Replacement procedure.
