Lincoln Electric SVM103-A specification

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F-26

TROUBLESHOOTING & REPAIR

CAPACITOR AND/OR DIODE BRIDGE REMOVAL AND

REPLACEMENT

WARNING

Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty. For your safety and to avoid elec- trical shock, please observe all safety notes and precautions detailed throughout this manu- al.

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical trou- bleshooting assistance before you proceed. Call 216-383-2531 or 1-800—833-9353 (WELD).

DESCRIPTION

The following procedure will aid the technician in accessing and removing the capacitor and diode bridge for maintenance or replacement of either component.

MATERIALS NEEDED

5/16” Nut driver

Jumper wire with alligator clips on each end for discharging the field capacitor Slot head screw driver

Needle nose pliers Wiring Diagram

POWER-ARC 4000

Image 67

Lincoln Electric SVM103-A service manual Capacitor AND/OR Diode Bridge Removal Replacement

Contents

POWER-ARC TM4000 POWER-ARC Safety Electric Shock can kill Iii Welding Sparks can cause fire or explosion Précautions DE Sûreté Master Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications POWER-ARC Installation Location and Ventilation Safety PrecautionsStoring PRE-OPERATION Engine Service Cable Size and Length Power ARCElectrical Output Connections Welding Cable Connections Plugs and HAND-HELD Equipment Auxiliary Power ReceptaclesCable Installation Machine Grounding Circuit Breakers Premises Wiring Type Common Electrical Devices Possible Concerns Table A.2 Electrical Device USE with the POWER-ARC Table of Contents Operation Section General Description Safety InstructionsOperation Operating Instructions Welding Capability Operational Features and ControlsDesign Features Advantages Recommended Applications GENERATOR/WELDER Controls Controls and Settings Gasoline Engine Controls Figure B.2 Gasoline Engine Controls Before Starting the Engine Engine OperationStarting the Engine Running the Engine Stopping the EngineBREAK-IN Period Generator Operation To USE the Generator AS AN Auxiliary Power SupplyGeneral Information Table B.3 Generator Power Applications Welding Operation To USE the POWER-ARC 4000 for WeldingAfter YOU Finish the Weld Welding Guidelines Material Thickness Electrode Type Size SettingStick Welding ARC Welding Circuit Correct WAY to Strike AN ARC 12/95 POWER-ARCFour Factors of Successful Welding Electrode Correct Welding Speed Correct ARC Length Table of Contents Accessories Lincoln Electric Accessories OPTIONS/ACCESSORIESBriggs and Stratton Accessories Table of Contents Maintenance Engine Maintenance Routine and Periodic Maintenance Figure D.2 Clean Rotating SCREEN/FINGER GUARD/DEBRIS Guard Figure D.4 SET Spark Plug GAP GENERATOR/WELDER Maintenance Table D.2 Engine Maintenance PartsPart Part Number Figure D.6. Major Component Locations Table of Contents Theory of Operation Section ENGINE, EXCITATION, Rotor and Stator Theory of Operation Figure E.3 Field Excitation and Auxiliary Power Rotor Field Feedback and Auxiliary Power Weld Winding and Reactor Auxiliary Power Overcurrent Protection Table of Contents Trouble Shooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & Repair Output Problems Troubleshooting Guide Or contact your local Lincoln Local Lincoln Electric Authorized Troubleshooting & Repair Troubleshooting & Repair Engine Problems Engine Problems Welding Problems Test Description Rotor Voltage TestMaterials Needed Ground Stud Lead 200A Connection Output Panel Test Procedure Rotor Resistance Test Rings Slip Cable TIE Brushes Figure F.3 Brushes Retained with Cable TIE Engine Throttle Adjustment Test Oscilloscope Method MarkStrobe-tach Method Frequency Counter Method NUT Figure F.5 Location of Engine Throttle Adjustment NUT Normal Open Circuit Weld Voltage Waveform Scope SettingsHigh Idle no Load Normal Open Circuit Voltage Waveform 115 VAC Supply Machine Loaded Typical Weld Output WaveformMachine Loaded to 125 Amps AT 23 VAC Description Brush Removal and Replacement Figure F.6 Brushes Retained with Cable TIE Procedure Procedure Rheostat Removal and Replacement Figure F.7 Rheostat Removal Capacitor AND/OR Diode Bridge Removal Replacement Procedure Capacitor Removal and Replacement Capacitor AND/OR Diode Bridge Removal and Replacement Procedure Diode Bridge Removal and Replacement Instructions STATOR/ROTOR Removal and Replacement Terminals Stator Removal ProcedureTIE Wrap Output Figure F.10 Stator END Bracket Support and THRU-BOLTS Thru Bolts Support Nuts POWER-ARC Reassembly Procedure Rotor Removal ProcedureRotor THRU-BOLT Rotor Feeler Gauge WELDER/GENERATOR OUTPUT1 Auxiliary Power Receptacle OUTPUT1Retest After Repair Engine Output POWER-ARC Electrical Diagrams Table of ContentsSection G POWER-ARC Electrical Diagram POWER-ARC POWER-ARC