Lincoln Electric SVM189-B service manual See Figure F.12

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F-34	TROUBLESHOOTING & REPAIR	F-34

RECTIFIER, TRANSFORMER, CHOKE ASSEMBLY & CAPACITOR REMOVAL AND REPLACEMENT PROCEDURE (CONTINUED)

FIGURE F.10 – LOCKING TABS

Locking Tabs

3/8”Bolted Lead

(oppositesidenotshown)

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1.Remove the input power to the machine.

2.Perform the Case Cover Removal Procedure.

3.Perform the Power Module Removal Procedure.

WARNING

ELECTRIC SHOCK can kill.

•Have an electrician install and service this equipment. Turn the input power OFF at the fuse box before working on equipment. Do

not touch electrically hot parts.

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4.With the Power Module removed from the machine, depress locking tabs and remove the top chassis of the module. See Figure F.10.

5.Using a 3/8” nutdriver, remove the two bolted leads from the sides of the Rectifier. See Figure F.10.

6.Label and disconnect any associated leads.

7.Remove Rectifier and Capacitor from the machine.

See Figure F.12.

COMPACT WIRE WELDERS

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Contents Safety Depends on You SVM189-BSafety California Proposition 65 WarningsElectric Shock can kill ARC Rays can burn For Electrically Welding CuttingIii Précautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical SpecificationsSafety Precautions Select Suitable LocationStacking TiltingIdentify and Locate Components Table of Contents Operation Section Operation Product Description Product CapabilitiesCommon Welding Abbreviations Wear eye, ear and body protec- tionSee Figure B.1 Controls and SettingsSee Figure B.2 See Figure B.3 Drive Roll Tension Thumbscrew TurningWire Diameter Drive Roll Drive Roll Part Inner Wire Guide Number Part NumberSetting UP and Making a FLUX-CORED Weld Items Needed for Flux Cored WeldingConnect Leads and Cables on Load Wire SpoolMachine Figure B.9 MIG Conversion Kit K2526-1 025Install Shielding GAS Shielding GAS11OPERATION Connect Leads and Cables on the Machine12OPERATION Do not Remove or Conceal Warning LabelsFigure B.20 Compact Wire Welders Table of Contents Accessories Section Accessories K2525-1 Spot Timer KitK2532-1 Magnum 100SG Spool Gun K2377-1 Small Canvas CoverK520-Utility Cart K2275-1 Welding Cart Technical Specifications Magnum 100SG Spool GUN K2532-1 Unpacking the Spool GUNSafety Precautions Locating Spool GUN Components FeaturesAssembly of Items Inside the Magnum Spool GUN Figure C.3Recommended Welding Machines Safety Precautions Welding MachinesSpool GUN Disconnect input power from the machine Spool GUN / Wire Drive Selector Switch InstallationOpen the Machine 11.B. Connect P5 6-pin to harness J8 6-pin Electrical Connections11.C. Connect harness P8 6-pin to board J5 6- pin If Machine does have Optional Spot Timer .A. thru 12.D 544A 543AMounting the Switch RE-ASSEMBLE Machine AS FollowsACCESSORIESC-13 Disconnect input power to the machineRoutine Welding Machine Preparation Preparing the Spool GUNLoading Aluminum Wire Figure C.5Figure C.11 Connecting the GUN to the Welding Machine Figure C.17Table of Contents Maintenance Section Maintenance Safety Precautions MaintenanceRoutine Maintenance Overload Protection GUN and Cable MaintenanceFor Magnum 100L GUN GUN Handle Parts Changing LinerLiner trim length Major Component Locations Maintenance 1TABLE of CONTENTS-THEORY of Operation Section E-1 Theory of Operation General DescriptionFigure E.3 Input Power Circuits Input Line VOLTAGE, FAN Motor & Main TransformerOutput CONTROL, Rectification & Voltage Feedback Figure E.4 Output CircuitsTRIGGER, GAS Solenoid and Wire Drive Figure E.5 TRIGGER, GAS Solenoid & Wire DriveSCR Operation Figure E.6 SCR OperationElectronic Wire Drive Motor Protection Compact Wire Welders Table of Contents Troubleshooting & Repair Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Wiring Diagram OUTPUT/FEEDING Problems Feeding Problems Welding Problems Maintenance Section Issues Maintenance Section Cone or gas diffuser Test Description Case Cover Removal and Replacement ProcedureMaterials Needed Procedure Figure F.1 Case RemovalGAS Solenoid Test GasSolenoid Leads Wire Drive Motor Test Test Procedure MOT-MOT+Main Transformer Test Secondary Test Procedure Secondary Lead Compact Wire Welders FAN Motor Test Figure F.5. Control Board Lead Locations Typical Output Voltage Waveform Machine Loaded Scope SettingsVolts 10Volts 20ms Abnormal Open Circuit Voltage Waveform Control Board Removal and Replacement Procedure See Figure F.7 Nameplate Control Knob Compact Wire Welders Power Module Removal and Replacement Procedure Viewed from Rear of Machine Center Panel PolarityPanel CenterPanelScrews OutputStuds Compact Wire Welders Misc. Hand Tools Dow Corning Fine Steel Wool See Figure F.12 Dow Corning Figure F.12 DOW Corning Application Areas Transformer Compact Wire Welders Wire Drive Motor Removal and Replacement Procedure Lincolnelectric Phillips Mounting Screws Compact Wire Welders FAN Motor Assembly Removal and Replacement Procedure Viewed from Rear of Machine Center Panel CenterPanelScrews Locking Tabs Fan Troubleshooting & Repair Retest After Repair 125 AMP Units Wire Speed RangeRetest After Repair 140 AMP Units Open Circuit VoltageTroubleshooting & Repair Retest After Repair 180 AMP Units Table of Contents Diagram Section Wiring Diagram COmpacT WirE WElDErSSpool GUN Interface Wiring Diagram Wiring Diagram M20410-3 a COmpacT WirE WElDErS Thermostat TMP FAN TS1SchEmaTic cOmplETE machiNE m21240 C12 R1Feed R24