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F-25

F-25

 

 

TROUBLESHOOTING & REPAIR

DC BUS POWER SUPPLY PC BOARD TEST(CONTINUED)

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6.Check the DC Bus Power Supply PC Board input and output voltages according to Table F.3. See Figure F.7 and the Wiring Diagram.

If plug P46 pin 1-3 voltage is missing, perform T1 Auxiliary Transformer Test.

WARNING

ELECTRIC SHOCK can kill.

High voltage is present at the terminals of Capacitor C3 near where testing is to be done.

7.If all the voltages are correct, the DC Bus Power Supply PC Board is operating prop- erly.

8.If any of the output voltages are not correct and the input voltage is correct, the DC Bus Power Supply PC Board may be faulty, or the supplied board may be bad.

9.If the input voltage is not correct, check the leads between the DC Bus Power Supply PC Board and the Power PC Board Rectifier. See the Wiring Diagram.

10.When finished testing, replace the case top.

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TABLE F.2 – DC BUS POWER SUPPLY PC BOARD VOLTAGE TABLE

Positive Meter Probe

Negative Meter Probe

Approximate Voltage

Conditions/Comments

Test Point

Test Point

Reading

 

 

 

 

 

 

Plug P46 – Pin 1

Plug P46 – Pin 3

65

– 75 VDC

Should be same as the

 

 

 

 

Power PC Board

 

 

 

 

Rectifier

 

 

 

 

 

Plug P47 – Pin 7

Plug P47 – Pin 6

38.0

– 42.0 VDC

Supply to Power PC

 

 

 

 

Board

 

 

 

 

 

Plug P47 – Pin 8

Plug P47 – Pin 6

38.0

– 42.0 VDC

Supply to Power PC

 

 

 

 

Board

 

 

 

 

 

Plug P47 – Pin 4

Plug P47 – Pin 2

38.0

– 42.0 VDC

Supply to Feed Head PC

 

 

 

 

Board

 

 

 

 

 

Plug P47 – Pin 3

Plug P47 – Pin 1

38.0

– 42.0 VDC

Supply to S1 Wire

 

 

 

 

Feeder Receptacle

 

 

 

 

 

POWER WAVE 455M/MSTT

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Image 71
Lincoln Electric SVM173-A service manual Table F.2 DC BUS Power Supply PC Board Voltage Table

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.