Lincoln Electric SVM176-A Troubleshooting & Repair, PC Board Troubleshooting Procedures

Page 31

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F-3

 

TROUBLESHOOTING & REPAIR

F-3

 

 

 

PC BOARD TROUBLESHOOTING PROCEDURES

 

 

 

 

WARNING

- Remove the PC board from the static-shielding bag

 

 

 

and place it directly into the equipment. Donʼt set the

 

 

 

ELECTRIC SHOCK

PC board on or near paper, plastic or cloth which

 

 

 

can kill.

could have a static charge. If the PC board canʼt be

 

•

Have

an electrician install and

installed immediately, put it back in the static-shield-

 

ing bag.

 

 

 

 

service this equipment. Turn the

- If the PC board uses protective shorting jumpers,

 

 

 

input

power OFF at the fuse box

 

 

 

before working on equipment. Do

donʼt remove them until installation is complete.

 

 

 

 

not touch electrically hot parts.

- If you return a PC board to The Lincoln Electric

 

 

 

CAUTION

Company for credit, it must be in the static-shielding

 

 

 

bag. This will prevent further damage and allow prop-

 

 

 

er failure analysis.

 

 

Sometimes machine failures appear to be due to PC

4. Test the machine to determine if the failure

 

board failures. These problems can sometimes be

symptom has been corrected by the

 

traced to poor electrical connections. To avoid prob-

replacement PC board.

 

 

lems when troubleshooting and replacing PC boards,

NOTE: It is desirable to have a spare (known good)

 

please use the following procedure:

 

1. Determine to the best of your technical ability

PC board available for PC board troubleshooting.

 

NOTE: Allow the machine to heat up so that all

 

that the PC board is the most likely component

 

causing the failure symptom.

electrical components can reach their operating

 

2. Check for loose connections at the PC board

temperature.

 

 

5. Remove the replacement PC board and

 

to assure that the PC board is properly

substitute it with the original PC board to

 

connected.

 

 

recreate the original problem.

 

 

3. If the problem persists, replace the suspect PC

a. If the original problem does not reappear by

 

board using standard practices to avoid static

substituting the original board, then the PC

 

electrical damage and electrical shock. Read

board was not the problem. Continue to look

 

the warning inside the static resistant bag and

for bad connections in the control wiring

 

perform the following procedures:

harness, junction blocks, and terminal strips.

 

PC board can be damaged by static electricity.

b. If the original problem is recreated by the

 

 

 

- Remove your bodyʼs static

substitution of the original board, then the

 

 

 

 

 

 

charge before opening the static-

PC board was the problem. Reinstall the

 

 

 

shielding bag. Wear an anti-static

replacement PC board and test the machine.

 

 

 

wrist strap. For safety, use a 1

6. Always indicate that this procedure was

 

ATTENTION

 

Meg ohm resistive cord connected

followed when warranty reports are to be

 

 

to a grounded part of the

submitted.

 

 

Static-Sensitive

 

equipment frame.

NOTE: Following this procedure and writing on the

 

Devices

 

- If you donʼt have a wrist strap,

 

Handle only at

 

touch an un-painted, grounded,

warranty report, “INSTALLED AND SWITCHED PC

 

Static-Safe

 

part of the equipment frame. Keep

BOARDS TO VERIFY PROBLEM,” will help avoid

 

Workstations

 

touching the frame to prevent

denial of legitimate PC board warranty claims.

 

 

 

 

static build-up. Be sure not to

 

 

 

 

 

touch any electrically live parts at

 

 

 

 

 

the same time.

 

 

 

- Tools which come in contact with the PC board must

 

 

 

be either conductive, anti-static or static-dissipative.

 

 

Page 30 Page 32
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Contents LN-23P Safety Depends on YouElectric Magnetic Fields SafetyPowered equipment For EngineFumes and Gases Electric Shock can kill ARC Rays can burnCan be dangerous Iii Cylinder may explodeCause fire or explosion If damaged For ElectricallyTransformateur ET À Précautions DE SûretéPrécautions DE Sûreté Pour LES Machines À Souder ÀMaster Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications LN-23P InstallationEnvironmental Rating Sensing Work Lead Safety PrecautionsInput Cable Work Cable and Remote VoltageOptional Features Installation Wire Drive Rolls and Guide TubesInnershield GUN and Cable Power Source AccessoriesLN-23P Operation Section Table of ContentsOperation Section B Operation Loading the Wire ReelProduct Description Making the Weld Adjusting Wire Feed SpeedDrive Roll Pressure VoltageLN-23P Accessories Section C Accessories SectionK350 Adapter KIT Enclosed Wire Reel SupportOptional Equipment GUN and Cable AssembliesMaintenance Section D Maintenance SectionRemoving Idle Roll Assembly MaintenanceGUN and Cable Maintenance Wire Drive Assembly MaintenanceNameplates Circuit ProtectionLN-23P Section E E-2E-2E-3E-3E-3E-4 Theory of Operation SectionTheory of Operation Input Power CircuitGeneral Description Figure E.3 Control Circuits K350 / K350-1ADAPTER Kits Optional CircuitsK350 / K350-1ADAPTER Kits LN-23P Troubleshooting and Repair Section F Troubleshooting and RepairSection F-1 Important Troubleshooting Tips How To Use Troubleshooting GuidePC Board Troubleshooting Procedures Troubleshooting & RepairElectric Shock Gun Perform Potentiometer Test Call LN-23P K350 Adapter ProblemsTest Description Wire Feeder TestMaterials Needed Test Procedure Wire Feeder TestGUN Test GUN Test 10TROUBLESHOOTING and REPAIRF-10Feed Head Test Feed Head Test 12TROUBLESHOOTING and REPAIRF-12Potentiometer Test Wire Speed Control Potentiometer 14TROUBLESHOOTING and REPAIRF-14Potentiometer Test K350-1 Adapter Test K350-1 Adapter Test 16TROUBLESHOOTING and REPAIRF-16Measurement Points Expected Reading Calibration Check 18TROUBLESHOOTING and REPAIRF-18Electrical Diagrams Section G Electrical Diagrams SectionSection G-1 Wiring Diagram Entire Machine M14197 Electrical DiagramsSchematic Entire Machine L6518 Wiring Diagram K350 Adapter KIT M14247 Wiring Diagram K350-1 Adapter KIT M17514 Machine Schematic for K350/K350-1 Adapter PC Board Assembly for Codes below 10892 G1528-4 PC Board Assembly for Codes 10892 and Higher G4184-3 Schematic for LN-23P Codes 10892 and Higher L11838-3

SVM176-A specifications

The Lincoln Electric SVM176-A is a robust and versatile semiautomatic wire feeder designed to cater to a wide range of welding applications. Known for its reliability and ease of use, the SVM176-A is particularly favored in both industrial and construction settings, where efficiency and performance are paramount.

One of the standout features of the SVM176-A is its compact design. This relatively lightweight unit is easy to transport and can fit into tight spaces, making it an ideal choice for mobile applications or projects that require more maneuverability. The unit's construction is durable and built to withstand the rigors of demanding work environments, ensuring longevity and consistent performance.

The SVM176-A supports various welding processes, including MIG (Metal Inert Gas) and flux-cored arc welding, providing versatility for different materials and thicknesses. This adaptability is enhanced by its ability to accommodate a variety of wire sizes, allowing users to select the ideal wire type for their specific project requirements. The equipment also features adjustable wire feed speed, helping to ensure optimal weld quality by allowing operators to tailor their settings based on the needs of the job.

Innovative technologies in the SVM176-A contribute to its performance. The unit is equipped with a digitally controlled microprocessor that streamlines operations, providing enhanced control over welding parameters. This advanced technology enables users to achieve precise welds consistently, minimizing the risk of defects and improving overall efficiency.

Another remarkable characteristic of the SVM176-A is its user-friendly interface. The unit features easy-to-read displays and intuitive controls, enabling operators to make quick adjustments without having to consult an extensive manual. This is particularly beneficial in fast-paced work environments where time is of the essence.

Furthermore, the Lincoln Electric SVM176-A boasts a range of safety features, including thermal overload protection and a sturdy casing, which safeguard both the equipment and the operator. With these characteristics combined, the SVM176-A stands out as a preferred choice for professional welders seeking reliability, versatility, and operational excellence in their equipment. This exceptional wire feeder continues to uphold Lincoln Electric's commitment to quality and performance in welding technology.
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