Lincoln Electric SVM176-A service manual Measurement Points Expected Reading

Page 45

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F-17

 

TROUBLESHOOTING AND REPAIR

 

F-17

 

 

 

 

K350(-1) ADAPTER TEST (cont.)

 

 

 

TEST PROCEDURE

 

 

 

 

3. Close the Power Switch (S1).

 

 

 

1. Connect a switched and grounded 120VAC supply

 

 

 

to terminals 31 & 32 of the Control Terminal Strip

4. Check for 24VAC at terminals 605 &606 on the PC

 

and the ground stud (GND) as shown in Fig. F.5.

 

2. Connect two toggle or push button switches to ter-

Board.If no voltage or incorrect voltage, check the

 

minals 602 & 604 of the Wire Feed Tereminal strips.

 

 

Control Transformer.

 

 

 

 

 

 

 

 

 

 

 

 

5. With an Ohmmeter or continuity tester, check for the

 

 

 

 

 

 

 

 

 

 

values listed in the troubleshooting chart (Fig.F.7),

 

 

 

 

WARNING

 

 

under all three conditions, (Switch A&B open,

 

 

 

 

 

 

 

 

 

 

Switch A closed and Switch B closed).

 

 

 

 

 

 

 

 

 

 

 

ELECTRIC SHOCK can kill.

 

 

this

6. When Switch A is closed, 1CR relay should function.

 

• Only qualified personnel should perform

When Switch B is closed, 2CR relay should func-

 

installation,

maintenance and

troubleshooting

tion. a. If neither relay functions the PC Board may

 

work.

 

 

 

 

 

 

 

 

 

be defective.

 

 

 

• Turn off the input power at the fuse box before

 

 

b. If one of the relays does not work, check for

 

working on other equipment connected to

the

 

 

24vdc at the relay coil. (See Wiring

 

welding system at the disconnect switch or fuse

 

 

Diagram).

 

 

 

 

box before working on this equipment.

 

 

 

 

If voltage is present, replace the relay.

 

• Do not touch electrically hot parts.

 

 

 

 

If no voltage, check the wiring.

 

 

 

 

 

 

 

 

 

 

7. If all of the above tests are correct, check the

 

 

 

 

 

 

 

 

 

 

Control Cable for continuity on all leads. (See the

 

 

 

 

 

 

 

 

 

 

Wiring Diagram)

 

 

 

 

 

 

 

FIGURE F.7 TROUBLESHOOTING CHART

 

 

 

 

MEASUREMENT POINTS

 

 

 

 

 

EXPECTED READING

 

 

 

 

 

 

 

 

 

 

 

 

CONTROL

 

WIRE FEED

 

SWITCH

 

SWITCH A

 

SWITCH B

 

INCORRECT

 

CORRECTIVE

 

 

 

 

 

 

 

 

 

 

TERMINAL

 

TERMINAL

 

A & B

 

CLOSED

 

CLOSED

 

READING

 

 

 

STRIP

 

STRIP

 

OPEN

 

B OPEN

 

A OPEN

 

INDICATES

 

ACTION

 

21

 

521A

 

OPEN (∞)

 

SHORT (0Ω)

 

OPEN (∞)

 

1CR or PC Bd

 

 

 

 

 

 

521B

 

OPEN (∞)

 

OPEN (∞)

 

SHORT (0Ω)

 

2CR or PC Bd

 

Perform

 

75

 

75A

 

OPEN (∞)

 

SHORT (0Ω)

 

OPEN (∞)

 

1CR or PC Bd.

 

 

 

 

 

 

 

 

tests in

 

 

 

 

75B

 

SHORT (0Ω)

 

OPEN (∞)

 

SHORT (0Ω)

 

2CR or PC Bd.

 

 

 

 

 

 

 

 

 

 

Step 6

 

76

 

76A

 

OPEN (∞)

 

SHORT (0Ω)

 

OPEN (∞)

 

1CR or PC Bd.

 

 

 

 

 

 

76B

 

SHORT (0Ω)

 

OPEN (∞)

 

SHORT (0Ω)

 

2CR or PC Bd.

 

Check for loose

 

77

 

77A

 

SHORT (0Ω)

SHORT (0Ω)

 

SHORT (0Ω)

 

Wiring

 

 

 

 

 

 

 

or broken con-

 

 

 

 

77B

 

SHORT (0Ω)

SHORT (0Ω)

 

SHORT (0Ω)

 

Wiring

 

 

 

 

 

 

 

 

 

nections

 

 

4 to 2A

 

----

 

OPEN (∞)

 

SHORT (0Ω)

 

OPEN (∞)

 

1CR or PC Bd.

 

Perform

 

 

 

 

 

 

 

 

tests in

 

 

4 to 2B

 

----

 

OPEN (∞)

 

OPEN (∞)

 

SHORT (0Ω)

 

2CR or PC Bd.

 

 

 

 

 

 

 

 

 

Step 6

 

 

 

 

 

 

 

 

 

LN-23P

 

 

 

 

 

 

Page 44 Page 46
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Page 44 Page 46
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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