Lincoln Electric SVM140-A service manual T2 Auxiliary Transformer Test, Procedure

Models: SVM140-A

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F-35

F-35

TROUBLESHOOTING & REPAIR

(T2) AUXILIARY TRANSFORMER TEST (continued)

FIGURE F.8 – T2 AUXILIARY TRANSFORMER

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PLUG J21

PLUG J22

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

9

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLUG J21

(H5) 6

3 (H4)

 

2 (H3)

(H2) 4

1 (H1)

T2 AUXILIARY

PLUG J22 (6 Cavity)

 

 

 

 

 

 

 

 

TRANSFORMER

 

 

 

 

 

 

 

 

(H5) 8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(H4) 7

 

 

 

 

 

 

 

2 (H3)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(H2) 5

 

 

 

 

 

 

 

1 (H1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLUG J22 (8 Cavity)

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PROCEDURE

1.Remove main input power to the Pro-Cut 55 machine.

2.Perform the Input Filter Capacitor Discharge Procedure detailed earlier in this section.

3.Locate the auxiliary transformer just behind the input line switch on the lower right side of the machine.

4.Locate and disconnect plugs J21 and J22 from the wiring harness. Cut any necessary cable ties. See Figure F.8.

5.Carefully apply the 230 VAC isolated supply to leads H1 (1J22) and H3 (2J22) of the aux- iliary transformer. These leads are located in plug J22.

6.Carefully check for the presence of the fol- lowing primary and secondary voltages at the appropriate leads at plugs J21 and J22. See Figure F.8 and Table F.6..

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PRO-CUT 55

Page 72
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Lincoln Electric SVM140-A service manual T2 Auxiliary Transformer Test, Procedure