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F-68

F-68

TROUBLESHOOTING AND REPAIR

CONTROL BOARD POWER SUPPLY TEST (continued)

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TEST PROCEDURE

NOTE 1: In this test procedure, the positive output stud is used for common.

NOTE 2: This test procedure does not test the engine control power supply portion of the control board.

1.Using the 5/16” nut driver, open the control panel and tilt out. Remove the control board cover.

2.Using the control PC board layout, locate capaci- tor C112 (Figure F.31) and scrape the environmen- tal coating off the negative lead. Start the machine.

WARNING

There are high voltages present inside the control box while the machine is running. THE VOLTAGES ARE HIGH ENOUGH TO KILL. Use extreme cau- tion to avoid the backside of the recep-

tacles, breakers, and terminal strip while checking voltages inside the control box.

3.Refer to the Stator Voltage Test, step 10, to test the E1-E2 stator winding that powers the control PC board. If the voltage is correct, proceed to step 4. If the voltage is incorrect, shut down the machine, unplug J2, restart the machine, and check the voltage again at J2 pins 1 to 4. If the voltage is still incorrect, abort the “Control Board Power Supply Test” and proceed to the “Stator Resistance Test”.

4.With the machine running, measure the voltages at the control board per the following table.

5.If any of the voltage checks in the Table F.2 below are incorrect, replace the control board.

6.If the test is complete, replace the control board cover and close the control panel.

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Table F.2

Measurement Point

Voltage

Description

 

 

 

J5 pin 2 to common

15 VDC +/- 5%

+15V supply for display

J4 pin 6 to common

10 VDC +/- 5%

+10V supply for weld control & exciter module

J5 pin 7 to common

5 VDC +/- 5%

+5V supply for microprocessor

C112 neg. lead to common

-10 VDC +/- 5%

-10V supply for weld control

J8 pin 2 to J8 pin 3

24 VDC +/- 5%

+24V supply for 2-4 circuit

J20 pin 3 to J20 pin 4

15 VDC +/- 5%

+15V supply for CV SCR gate drive circuit

 

 

 

Figure F.31 Control Board Plugs C112 & J2

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C112

J20

J22

J2

 

 

 

J1

J6

J5

J8

J7

 

 

J4

C112

Pin #1

Pin #2

Pin #3

Pin #4

Plug J2

COMMANDER 400

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Lincoln Electric SVM133-B service manual C112

SVM133-B specifications

The Lincoln Electric SVM133-B is an innovative welding machine designed to meet the diverse needs of welders and fabrication shops. This versatile equipment combines state-of-the-art technology with user-friendly features, making it ideal for both novice and professional welders.

One of the main features of the SVM133-B is its advanced inverter technology. This allows for a more efficient power delivery, which translates into reduced energy consumption and lower operational costs. The machine is capable of delivering optimal welding performance across a range of materials, from thin sheets to heavier sections, making it suitable for various applications in industries such as automotive, construction, and repair.

The SVM133-B supports multiple welding processes, including MIG, stick, and TIG welding. This flexibility ensures that users can adapt to various job requirements without needing multiple machines. The intuitive control panel allows users to switch between modes effortlessly, providing a seamless welding experience.

Another notable characteristic of the SVM133-B is its compact and lightweight design. Weighing significantly less than traditional welding machines, it is highly portable, making it easy to transport to different job sites. Additionally, its rugged construction ensures durability, allowing it to withstand tough working conditions.

The SVM133-B is equipped with advanced safety features, such as overheat and overload protection, which safeguard both the machine and the user during operation. It also includes a digital display that provides real-time feedback on settings, voltage, and amperage, which enhances precision and control during welding tasks.

Lincoln Electric has prioritized ease of use in the SVM133-B, with quick setup guides and clear instructions. This user-centric approach not only facilitates a smoother learning curve for beginners but also optimizes the workflow for experienced welders, enabling them to maximize productivity.

One of the standout features is the capability to weld aluminum with ease, thanks to its spool gun compatibility. This feature sets the SVM133-B apart from many competitors, providing added value for users who require flexibility in their welding projects.

In summary, the Lincoln Electric SVM133-B stands out in the welding machine market due to its inverter technology, multi-process capabilities, portability, and robust safety measures. It embodies the perfect blend of innovation and practicality, making it a top choice for welders looking to enhance their skills and productivity across a wide array of applications. Whether for professional use or hobbyist projects, the SVM133-B offers a reliable solution for high-quality welding tasks.