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F-49

TROUBLESHOOTING & REPAIR

F-49

POWER BOARD TEST (cont.)

FIGURE F.23 - POWER BOARD TEST POINTS

309

310

212A

301 302

 

 

POWER BOARD

 

 

 

L8033

 

 

J7

J14

 

J6

275D

 

313

311

211A

 

501

 

305

 

 

 

 

 

 

504

 

 

 

 

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6.Test for 18 VAC input from Auxiliary Transformer between leads 504 and 501 (J7-pin 5 & pin 6) on Power Board.

If 18 VAC is not correct, check the 3 amp fuse, the Auxiliary Transformer and associated wires.

7.Test for 15 VDC output between leads 275D (-) and 302 (+) (J6-pin1 & pin 6) on Power Board.

If 15 VDC output is not present, replace Power Board.

NOTE: If relays energized in Step 4a, skip to Step 10.

8.Test for 24 VAC from lead 211A to lead 212A (J6- pin 4 & pin 9).

If 24VAC is not present, test the Auxiliary trans former and associated wires. The Control Board or thermostats may also be defective. (See Fig. F.24).

9.Test for 24VDCfrom lead 309 (+) to lead 313 (-) (J7pin 2 to J14 pin 2).

If 24VDC is not present but 24VAC (step 8) is cor rect, the Power Board is defective.

10.Test for 24VDC from lead 309(+) to lead 310(-) (J7 pin 2 to J7 pin 4).

If 24 VDC is not present, check the voltage from lead 311(+) to lead 313(-).

If the voltage is greater than 1VDC, perform the Protection Board test.

If the voltage is approximately 1vdc and the 24vdc is not present between leads 309 & 310, the Power Board is defective

V300-PRO

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Image 79
Lincoln Electric SVM105-B service manual Figure F.23 Power Board Test Points

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.

The SVM105-B also boasts an impressive output range, typically between 10A to 105A, allowing for adaptability to different welding tasks. Its ability to seamlessly switch between DC and AC modes makes it an ideal choice for professionals working in diverse environments, facilitating operations such as TIG and stick welding. This versatility is further enhanced by its compatibility with various electrode types, ensuring a more efficient and effective welding process.

User safety and comfort have not been overlooked in the design of the SVM105-B. Equipped with an efficient cooling system, this machine effectively manages heat during prolonged use, ensuring durability and longevity. Additionally, its intuitive digital display provides real-time feedback on settings, making it easier for users to monitor parameters and make necessary adjustments on the fly.

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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.