Lincoln Electric SVM157-A service manual Main Transformer Replacement, See Figure F.17

Models: SVM157-A

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TOC

F-42

TROUBLESHOOTING AND REPAIR

F-42

 

 

 

 

MAIN TRANSFORMER REPLACEMENT (Continued)

 

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PROCEDURE

1.Using a 3/8” nutdriver, remove both sides of the case wraparound cover.

2.Using a 5/16” nutdriver, remove the tool tray.

3.Locate the main transformer. See Figure F.16.

4.Label and disconnect leads X9, X10, 104B, & 104C. See Figure F.17.

5.Using a flathead screwdriver, Label and dis- connect lead H1B and other associated lead connected to the same terminal. These leads are connected to the ON/OFF switch.

See Figure F.17.

6.Using a 7/16” nutdriver, Label and discon- nect leads X8, X7, X6, X5, X4, X3, & X2 from the switch assembly. Note washer position upon removal. See Figure F.18.

7.Using a 1/2” nutdriver, label and remove lead X1 from the output diode bridge rectifi- er.

8.Using a 5/16” Nutdriver, open the rear access panel. See Figure F.20.

9.Disconnect lead 118 from the rear access panel. See Figure F.21.

10.Feed lead 118 toward the inside of the machine.

11.Cut any necessary cable ties.

12.Remove any necessary wiring harnesses.

13.Disconnect lead 121. See Figure F.19.

14.Using a 1/2” nutdriver, remove the four main transformer mounting bolts and associated washers. See Figure F.16.

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FIGURE F.16. - MAIN TRANSFORMER LOCATION

Main Transformer

1/2" Mounting

Bolts

POWER MIG 200

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Lincoln Electric SVM157-A service manual Main Transformer Replacement, See Figure F.17