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F-47

F-47

TROUBLESHOOTING & REPAIR

SCR BRIDGE ASSEMBLY REMOVAL AND REPLACEMENT (continued)

FIGURE F.13 – SCR BRIDGE CONNECTIONS

 

"POS" LEAD (STEP 7)

 

"NEG" IN SLEAVING

 

(STEP 8)

LEAD

SHUNT & #220 LEAD

#217

 

LOCATIONS (STEP 11)

LEAD #216

"B" (STEP 12)

X2 LEAD LOCATION (STEP 10)

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For Steps 7-13, see Figure F.13.

7.Using the 7/16” wrench, label and remove the “POS” lead from the left side heat sink assem- bly. It is not necessary to remove the #218 lead.

8.Using the 7/16” wrench, label and remove the “NEG” lead from the D1 diode pigtail. NOTE: It will be necessary to remove the sleeve insulation to gain access to the con- nection.

9.Remove plug J1 from the control board. Also remove the plug and lead harness from the internal divider panel.

10.With the 1/2” wrench, remove the X2 trans- former secondary lead from the right side heat sink assembly. It is not necessary to remove the jumper lead or the #216 lead.

11.With the 7/16” wrench, remove the shunt and one #220 lead from the right side negative heat sink assembly. It is not necessary to remove the other #220 lead.

12.Using the 1/2” wrench, remove the “B” lead from the AC left side heat sink. It is not nec- essary to remove the copper jumper or the #217 lead.

13.Using the 3/8” wrench, remove the four mounting screws holding the SCR Bridge Assembly to the transformer iron assembly.

14.Carefully remove the SCR Bridge assembly from the machine.

SQUARE WAVE TIG 275

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Image 87
Lincoln Electric SVM141-A service manual Figure F.13 SCR Bridge Connections

SVM141-A specifications

The Lincoln Electric SVM141-A is a cutting-edge solution designed for operators requiring precision, efficiency, and versatility in their welding applications. This machine is known for its compact form but robust feature set, making it an ideal choice for both professional welders and industrial applications.

One of the standout features of the SVM141-A is its advanced inverter technology. This innovation allows for a stable arc, providing consistent results even under varying conditions. The machine minimizes power consumption, making it energy-efficient without compromising performance. The inverter technology also supports a wider input voltage range, making the SVM141-A suitable for use in diverse environments and job sites.

Another key characteristic is its multi-process capability. The SVM141-A supports MIG, stick, and TIG welding processes, providing flexibility for various welding tasks. This versatility enables operators to tackle different materials, including mild steel, stainless steel, and aluminum, making it a valuable tool for numerous projects.

The user-friendly interface of the SVM141-A includes an intuitive digital display, which allows welders to adjust settings with ease. This feature is crucial for ensuring the right configurations for specific welding tasks, reducing the chances of errors and enhancing the overall finish of welds.

Safety is also a priority with the Lincoln Electric SVM141-A. It comes with built-in safety features such as overheat protection and automatic shutdown, ensuring operator safety and equipment longevity. The machine's lightweight design enhances portability, allowing it to be used in various workspaces with ease.

Durability is another hallmark of the SVM141-A. Constructed with high-quality materials, the machine is designed to withstand the rigors of demanding work environments. This ensures reliability over time, providing consistent performance even under heavy use.

In summary, the Lincoln Electric SVM141-A is a versatile, efficient, and user-friendly welding machine that appeals to a wide range of users. Its advanced inverter technology, multi-process capabilities, safety features, and durable construction make it a strong contender in the welding market, suitable for both professionals and hobbyists alike. Whether it’s for light fabrication, repairs, or industrial welding tasks, the SVM141-A meets diverse needs with precision and reliability.