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F-84

F-84

 

 

TROUBLESHOOTING & REPAIR

OUTPUT RECTIFIER, STT CHOPPER BOARD AND RECTIFIER MODULE

REMOVAL AND REPLACEMENT (CONTINUED)

RECTIFIER MODULE REMOVAL AND

RECTIFIER ASSEMBLY REPLACE-

REPLACEMENT PROCEDURE

MENT PROCEDURE

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1.Using the 9/64” allen wrench, remove the cap screw from the center of the rectifier module that is to be replaced.

2.Using the 7/16” wrench, remove the two mounting bolts and associated washers from the rectifier module to be replaced.

3.Remove the faulty module.

4.This module requires special mounting con- siderations to prevent warping of the base plate. The heat sink surfaces must be clean and flat. Apply a thin, even coating of ther- mal compound, (Penetrox A13) 0.004 to 0.010 inches thick. Keep the compound away from the area of the mounting holes.

5.Press the new module firmly against the heat sink while aligning the mounting holes. Start all three screws two to three turns by hand.

6.Tighten each of the outer screws to between 5 and 10 in-lbs.

7.Tighten the center screw to between 12 and 18 in-lbs.

8.Tighten each of the outer screws again, this time to between 30 and 40 in/lbs.

1.Position the assembly in place with the mounting bolts.

2.Assemble the nuts and associated wash- ers to the mounting bolts.

3.Using the 7/16” wrench, tighten the four nuts on the mounting bolts.

4.Replace leads #292 and #291 to the ther- mostat.

5.Connect plug J10 to the STT Chopper Board.

6.With the 7/16” wrench, attach lead #287 from the STT Snubber Diode D5.

7.With the 7/16” wrench, attach lead #289B from the STT Snubber Capacitor C10.

8.Connect the eight transformer leads to the correct rectifier modules. Tighten the screws (with two flat washers and one lock washer) to between 30 and 40 in/lbs. Do not stress the terminals when making these connections.

9.Apply a thin coat of Penetrox A13 to the heat sink where the Power Wave positive output lead and the STT output lead attach.

10.Attach the Power Wave positive output lead to the heat sink using the 9/16” wrench.

11.Attach the STT output lead to the heat sink using the 7/16” wrench.

12.Install the case top and sides using the 3/8” nut driver.

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POWER WAVE 455M/MSTT

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Lincoln Electric SVM173-A service manual Troubleshooting & Repair

SVM173-A specifications

The Lincoln Electric SVM173-A is a highly regarded welding power supply that stands out for its advanced features, robust performance, and innovative technologies. This machine is specifically designed to meet the demands of both industrial and commercial welding applications, making it a versatile choice for professionals.

One of the main features of the SVM173-A is its high efficiency, which contributes to reduced energy costs and enhanced productivity. The device operates on a powerful DC output, ensuring stable and reliable arc performance. This is particularly beneficial when working with various materials, allowing for smooth and consistent welds.

The SVM173-A leverages Lincoln Electric's proprietary inverter technology. This innovation allows for a lighter weight and more compact design without compromising on power. The inverter technology also enables precise control of the welding parameters, which is critical for maintaining quality across different welding tasks. Additionally, the machine features a wide input voltage range, accommodating various power sources and enhancing its adaptability on job sites.

Another key characteristic of the SVM173-A is its user-friendly interface. The machine is equipped with an intuitive control panel that allows users to easily adjust settings, making it accessible for both novice and experienced welders. The digital display provides clear readouts of output parameters and error notifications, facilitating quick troubleshooting in the field.

Safety is paramount in welding operations, and the SVM173-A incorporates several protection features. These include overcurrent protection, overheating protection, and circuit protection, ensuring that the machine operates safely and efficiently under various conditions.

The SVM173-A also supports a wide range of welding processes, including MIG, TIG, and stick welding. This flexibility makes it an ideal choice for workshops that require a multi-process machine capable of handling diverse applications. Furthermore, the SVM173-A supports spool gun operation, which is particularly useful for aluminum welding, enhancing its versatility even further.

In summary, the Lincoln Electric SVM173-A is a powerful and adaptable welding machine that combines innovative technologies, user-friendly features, and robust safety mechanisms. Its high efficiency, precision control, and multi-process capabilities make it an excellent investment for professionals seeking reliable performance in demanding environments. Whether for heavy-duty industrial use or more specialized applications, the SVM173-A stands as a testament to Lincoln Electric's commitment to quality and innovation in welding solutions.