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F-30

TROUBLESHOOTING & REPAIR

F-30

SNUBBER RESISTOR TEST (cont.)

FIGURE F.9 - SNUBBER RESISTOR TEST POINTS

W R 401/

1/

9

12

4/

402/ R W

403

8

 

 

5

404

L8604-1 SWITCH

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1.Turn main Power off.

2.Perform Input Filter Capacitor Discharge proce- dure.

3.Remove leads 401,402 403 & 404 from theSwitch Boards.

4.Test for 25 ohms resistance from lead 401 to termi- nal 12 on Switch Board.

a.If 25 ohms is measured, Resistor R4 is OK.

b.If 30 ohms or more is measured, Resistor R4 is faulty and must be replaced.

c.If 20 ohms or less is measured, Resistor R4 is faulty and must be replaced.

5.Repeat same procedures to test R5, R6, and R7 per Table F.4.

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TABLE F.4 SNUBBER RESISTORS TEST

Check

 

Test Result

 

Conclusion

 

Next Test Step

 

Repair Action

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lead 401 to

 

25 ohms

 

OK

 

Continue

 

 

 

Terminal 12

 

>30 ohms

 

R4 open

 

 

 

Replace R4

 

 

 

<20 ohms

 

R4 faulty

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lead 402 to

 

25 ohms

 

OK

 

Continue

 

 

 

Terminal 9

 

>30 ohms

 

R5 open

 

 

 

Replace R5

 

 

 

<20 ohms

 

R5 faulty

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lead 403 to

 

25 ohms

 

OK

 

Continue

 

 

 

Terminal 12

 

>30 ohms

 

R6 open

 

 

 

Replace R6

 

 

 

<20 ohms

 

R6 faulty

 

 

 

 

 

Lead 404 to

 

25 ohms

 

OK

 

Continue

 

 

 

Terminal 9

 

>30 ohms

 

R7 open

 

 

 

Replace R7

 

 

 

<20 ohms

 

R7 faulty

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V300-PRO

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Lincoln Electric SVM105-B service manual Snubber Resistor Test, 402/ R W, 403 404

SVM105-B specifications

The Lincoln Electric SVM105-B is a state-of-the-art welding machine that represents a leap forward in welding technology, designed for both professionals and enthusiasts in the welding industry. This versatile machine combines robust performance with user-friendly features, making it suitable for a wide range of welding applications.

One of the key features of the SVM105-B is its advanced inverter technology. This allows for a lightweight design without compromising on power output. The inverter technology ensures a stable arc and precise control, enabling consistent weld quality across various materials, including mild steel, stainless steel, and aluminum. This feature is particularly beneficial for users who demand exceptional performance in both thin and thick materials.

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In conclusion, the Lincoln Electric SVM105-B stands out with its combination of advanced inverter technology, versatile output, user-friendly interface, and robust construction. Whether for professional or hobbyist use, this welding machine meets a wide array of welding needs while providing excellent performance and durability.