Lincoln Electric SVM 113-A service manual Figure F.18 Field Diode Bridge Location

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F-44 F-44

TROUBLESHOOTING & REPAIR

FIELD DIODE BRIDGE REMOVAL AND REPLACEMENT (continued)

FIGURE F.18 - FIELD DIODE BRIDGE LOCATION

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7A (Blue)

201(Black) 201C (Black)

–

200(Red)

200C (Red)

+

9A (Brown)	Field Diode Bridge
9B (Brown)

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5.The field diode bridge is mounted to the sheet metal just above the capacitor. See Figure F.18. Remove it using the slot head screw driver and the 11/32” wrench.

6.With the needle nose pliers, gently remove the 7 wires from the diode bridge.

7.Replace the wires to their appropriate loca- tions on the new diode bridge:

Lead 200 and 200C are piggy-backed to the positive (+) terminal. Depending on the bridge used, this corner may be beveled and/or marked with a + sign.

Lead 201 (Black) and 201B (Black) are piggy- backed on the negative (–) terminal, which will always be located diagonally across from the positive (+) terminal.

The Blue lead (7A) is attached to one AC ter- minal. Leads 9A and 9B are piggy-backed to the other AC terminal.

8.Mount the field diode bridge using the screw, washers and nut. Use the slot head screwdriver and 11/32” wrench.

9.Check that the leads are not grounded and for clearance and tightness.

10.Replace the control panel and tighten the 6 sheet metal screws with the 5/16” nut driver and 5/16” wrench.

11.Replace the top cover of the control box and tighten the 8 sheet metal screws with the 5/16” nut driver.

WELDANPOWER 125