Lincoln Electric SVM176-A service manual Perform Potentiometer Test

Page 33

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F-5

TROUBLESHOOTING AND REPAIR

 

 

F-5

 

 

Observe Safety Guidelines detailed in the beginning of this manual.

 

 

 

 

 

 

 

PROBLEMS

 

 

POSSIBLE AREAS OF

 

RECOMMENDED

 

 

 

 

 

 

 

 

 

(SYMPTOMS)

 

 

MISADJUSTMENT(S)

 

COURSE OF ACTION

 

 

 

Drive rolls turn but wire does not

 

FEEDING PROBLEMS (cont.)

 

1. Straighten gun and clean if nec-

 

 

 

 

 

 

 

1. Gun cable is excessively bent or

 

 

 

 

 

feed or feed is erratic.

 

 

is dirty.

 

essary. Perform Gun Test.

 

 

 

 

 

 

2. Weld wire tangled or binding in

 

2. Open Cannister and if neces-

 

 

 

 

 

wire reel enclosure.

 

sary cut and reload wire.

 

 

 

 

 

 

3. Worn drive rolls.

 

3. Reverse or replace. Refer to

 

 

 

 

 

4. Improper drive roll tension.

 

Section D.

 

 

 

 

 

 

 

 

 

4. Reset tension . Refer to Section

 

 

 

 

 

 

 

D.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Improper speed control.

 

 

1.Defective potentiometer, Control

 

1. Perform Potentiometer

Test,

 

 

 

 

 

Board or motor.

 

Wire Feeder

Test

and

Feed

 

 

Erratic arc action.

 

 

1. Incorrect speed or voltage set-

 

Head Test.

 

 

 

 

 

 

 

 

1. Check procedures.

 

 

 

 

 

 

 

ting.

 

2. Replace.

 

 

 

 

 

 

 

 

2. Worn contact tip.

 

 

 

 

 

 

 

 

 

3. Poor connections in weld circuit

 

3. Repair or replace weld cables

 

 

 

 

 

or weld cables too small.

 

 

 

 

 

 

 

Cannot obtain desired voltage.

 

OUTPUT PROBLEMS

 

1. Make sure power source is set

 

 

 

 

 

 

 

1. Power Source defective or set

 

 

 

 

 

 

improperly.

 

for remote control and CV mode.

 

 

 

 

 

 

NOTE: SAM 400 & 650 CV con-

 

 

 

 

 

 

 

trols will always affect the

 

 

 

 

 

2. Defective control cable from LN-

 

output voltage.

 

 

 

 

 

 

 

2. Check continuity of voltage con-

 

 

 

 

 

23P to Adapter or from Adapter

 

trol circuit,

leads

75,76,&77

 

 

 

 

 

to power source.

 

(A,B,&C) from feeder to power

 

 

 

 

 

 

source.

 

 

 

 

 

 

 

 

3. Defective voltage control rheo-

 

3. Perform Potentiometer Test.

 

 

 

 

 

stat.

 

4. See the K350 Adapter test

 

 

 

 

 

4. Defective K350 Adapter

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 1-888-935-3877.

LN-23P

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Contents LN-23P Safety Depends on YouPowered equipment SafetyFor Engine Electric Magnetic FieldsElectric Shock can kill ARC Rays can burn Fumes and GasesCan be dangerous Cause fire or explosion If damaged Cylinder may explodeFor Electrically IiiPrécautions DE Sûreté Pour Précautions DE SûretéLES Machines À Souder À Transformateur ET ÀMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications LN-23PEnvironmental Rating Input Cable Safety PrecautionsWork Cable and Remote Voltage Sensing Work LeadWire Drive Rolls and Guide Tubes Optional Features InstallationInnershield GUN and Cable Power Source AccessoriesLN-23P Table of Contents Operation SectionOperation Section B Loading the Wire Reel OperationProduct Description Drive Roll Pressure Adjusting Wire Feed SpeedVoltage Making the WeldLN-23P Accessories Section C Accessories SectionOptional Equipment Enclosed Wire Reel SupportGUN and Cable Assemblies K350 Adapter KITMaintenance Section D Maintenance SectionGUN and Cable Maintenance MaintenanceWire Drive Assembly Maintenance Removing Idle Roll AssemblyNameplates Circuit ProtectionLN-23P Section E E-2E-2E-3E-3E-3E-4 Theory of Operation SectionInput Power Circuit Theory of OperationGeneral Description Figure E.3 Control Circuits K350 / K350-1ADAPTER Kits Optional CircuitsK350 / K350-1ADAPTER Kits LN-23P Troubleshooting and Repair Troubleshooting and Repair Section FSection F-1 Important Troubleshooting Tips How To Use Troubleshooting GuideTroubleshooting & Repair PC Board Troubleshooting ProceduresElectric Shock Gun Perform Potentiometer Test Call LN-23P K350 Adapter ProblemsWire Feeder Test Test DescriptionMaterials Needed Test Procedure Wire Feeder TestGUN Test GUN Test 10TROUBLESHOOTING and REPAIRF-10Feed Head Test Feed Head Test 12TROUBLESHOOTING and REPAIRF-12Potentiometer Test 14TROUBLESHOOTING and REPAIRF-14 Wire Speed Control PotentiometerPotentiometer Test K350-1 Adapter Test K350-1 Adapter Test 16TROUBLESHOOTING and REPAIRF-16Measurement Points Expected Reading Calibration Check 18TROUBLESHOOTING and REPAIRF-18Electrical Diagrams Section Electrical Diagrams Section GSection 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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