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Lincoln Electric SVM153-A service manual Normal Open Circuit Voltage Waveform Wire CV TAP

Models: SVM153-A

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F-57

F-57

TROUBLESHOOTING & REPAIR

NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM (WIRE CV TAP)

MAX CONTROL POT – HIGH IDLE – NO LOAD

0 volts

50V5MS

This is the typical DC open circuit output voltage generated from a properly operating machine. Note that each vertical division represents 50 volts and that each horizontal division represents 5 milliseconds in time.

SCOPE SETTINGS

Volts/Div	50V/Div.
Horizontal Sweep	5 ms/Div.
Coupling	DC
Trigger	Internal

COMMANDER 500

Image 110

Lincoln Electric SVM153-A Normal Open Circuit Voltage Waveform Wire CV TAP, MAX Control POT High Idle no Load

Contents

CommanderTM Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications Commander 500 K1639-1Storing Safety PrecautionsLocation / Ventilation StackingTowing High Temperature OperationLifting High Altitude OperationPRE-OPERATION Engine Service Muffler Outlet Pipe Spark ArresterWelding Output Cables Auxiliary Power ReceptaclesStandby Power Connections Machine GroundingCompany Table of Contents Operation Section Operating Instructions Safety InstructionsOperation General DescriptionDesign Features and Advantages Recommended ApplicationsWelding Capability Controls and SettingsK1639-1 Commander 500 Standard Model Start Pushbutton RUN/STOP SwitchIdler Switch Fuel Level Gauge and LightTable B.1 Weld Mode and Output Control Functions Weld Mode Output ControlWelding Terminals Switch Hour MeterAuxiliary Power Controls BREAK-IN Period Engine OperationStarting the Engine Typical Fuel ConsumptionConstant Current CC Welding Welder OperationStick Welding TIG WeldingTable B.3 Typical Current RANGES1 for Tungsten ELECTRODES2 Commander 500 Settings When Using the K799 HI-FREQ UnitCommander 500 Settings When Using the K930-1 TIG Module TIG TorchSimultaneous Welding and Auxiliary Power Loads Auxiliary Power OperationWire Feed Constant Voltage Welding ARC GougingExtension Cord Recommendations Permissible Permissible AuxiliaryTable of Contents Accessories Section Field Installed Options AccessoriesOPTIONS/ACCESSORIES Stick Welding AccessoriesOther Wire Feeders for the Commander Semiautomatic Welding AccessoriesConnection of Lincoln Electric Wire Feeders High Frequency Generators for TIG ApplicationsTo Work Electrode Cable To Wire Feed Unit ING CV ING CV ING CV Figure C.5 Commander 500/LN-23P Connection Diagram ING Terminals Always on Table of Contents Maintenance Section Engine Maintenance MaintenanceRoutine and Periodic Maintenance DailyFigure D.1 OIL Drain and Refill Figure D.2 Fuel PRE-FILTER/WATER Separator Assembly Fuel FiltersFigure D.3 Secondary Fuel Filter AIR Filter Maintenance Frequency Maintenance Required Table D.2 Engine Maintenance Parts Manufacturer Part NumberBattery Maintenance Connecting a Battery ChargerWELDER/GENERATOR Maintenance Figure D.5 Major Component Locations Commander Table of Contents Theory of Operation SectionCommander Theory of OperationWeld WINDINGS, RECTIFIER, Power Modules and Feedback Analog Control Power Supply Board and Weld Control Board Insulated Gate Bipolar Transistor Igbt Operation Minimum Output Pulse Width Modulation6E-6 Maximum Output70-80VDC External DC Solid State Inductor ARC Source Switch DiodeChopper Technology Fundamentals Section F-1 Table of ContentsTroubleshooting & Repair Section Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures PC Board can be damaged by static electricityDetailed in the beginning of this manual Troubleshooting GuideObserve Safety Guidelines Perform the Rotor Resistance Justment Test Function Problems Charging Circuit Test Engine Problems Shutdown Perform the Idler Solenoid Problems Possible Areas Symptoms Misadjustments Course of ActionEngine Starting Diagnostic Chart START-UP and OCV Diagnostic Chart ReturnMaterials Needed Case Cover Removal and Replacement ProcedureDescription Case Cover Removal Replacement Procedure ProcedureFigure F.1 Case Front Knobs Removal and Replacement Procedure RemovalPower Module Capacitor Discharge Procedure Procedure Idler Solenoid Test Test DescriptionTest Procedure Figure F.5 Idler Solenoid LeadsShutdown Solenoid Test Figure F.6 Shutdown Solenoid Lead Terminals Engine Throttle Adjustment Test Figure F.7 Strobe Mark Location Mark Blower Paddle Here Strobe-tach MethodLocking NUT Oscilloscope Method 28F-28Frequency Counter Method Rotor Resistance Test Test Procedure Flashing and Rotor Voltage Test 10 11 12 13 14 15 Lead # 201ATroubleshooting & Repair Stator Voltage Test Figure F.13 Front Control Panel Removal Screws Troubleshooting & Repair Behind Panel Auxiliary Power and Weld Windings TestAuxiliary Leads #5B, #5E, #8, #9, #11, #12 W6W1 Weld Winding Lead ConnectionsAnalog Power Supply PC Board Voltage Test J41 Control Circuit Input Power40F-40 Analog Control Power Supply PC Board Test Test Points Component Tested Voltage ReadingOutput Rectifier Bridge Test Perform the Power Module Capacitor Discharge Procedure Troubleshooting & Repair Figure F.20 Diode Lead Removal Power Module Test W10 Temperature SwitchPower Module PC Board Diode Lead D4 Positive + Strap Check Igbt For Shorts When all tests are complete Check Diode ModuleCharging Circuit Test Figure F.24 Engine Alternator Location #239 #281 #238High Idle no Load Scope SettingsNormal Open Circuit Voltage Waveform 115VAC Supply 15.8 ms Volts 50V5msVolts 50V5ms Normal Open Circuit Voltage Waveform StickMAX TAP MAX Control POT High Idle no Load Volts 20V0.1ms Normal Weld Voltage Waveform Stick CCMachine Loaded to 500 Amps AT 40 Volts Normal Weld Voltage Waveform Wire CV Volts 10V50ms Normal TIG Mode Voltage WaveformLoaded to 200A 16 Volts Normal Open Circuit Voltage Waveform Wire CV TAP MAX Control POT High Idle no LoadShutdown Solenoid Removal and Replacement Figure F Shutdown Solenoid Lead Connections Reassembly Figure F Shutdown Solenoid Linkage ARM AssemblyDescription Control Panel Removal Screws Front Green Ground Lead Figure F Power Module Capacitor Lead Removal Troubleshooting & Repair Replacement Procedure Description Power Module PC Board Removal Figure F.30 Power Module PC BoardPower Module PC Board Replacement Diode Module Replacement Diode Module RemovalOutput Rectifier Bridge Diode Removal and Replacement Refer to Figure F.32 Turn the engine off Return Section TOC Diode Stud Size Foot Pounds Inch PoundsSTATOR/ROTOR Removal and Replacement Plug Fuel Lines Bolts Preparation and Lead Removal ProcedureLeads #229 #242D #200D #5P #201 #201A Filter Field Diode CapacitorFigure F.35 Brush Holder and Lead Removal #232MFigure F.37 Alternator Shroud Removal Screws Acoustical Foam Figure F.38 Lift Frame and Associated Component Removal Stator Removal Procedure Figure F.39 Stator RemovalRotor Removal Procedure Reassembly NotesOutput Panel and Control BOX Lead Reconnection ChecklistEngine Engine RPM Welder CV Wire OutputRetest After Repair Welder DC Stick OutputTouch Start TIG Mode Output Auxiliary Power OutputElectrical Diagrams Table of Contents Electrical Diagrams SectionElectrical Diagrams Schematic Complete Machine Commander G3834Schematic Battery PC Board PC Board Assembly Battery PC Board Return to SectionSchematic Chopper PC Board PWM InputPC Board Assembly Chopper PC Board Return to Section Return to Section TOCSchematic Peripheral PC Board PC Board Assembly Peripheral PC Board Return to SectionSchematic Power Supply Analog PC Board PC Board Assembly Power Supply Analog PC Board PC Board Reference QTY Designators DescriptionSchematic PULL-COIL PC Board PC Board Assembly PULL-COIL PC Board MOSFET/HEATSINK ASBLY,T12704-82&S1810Schematic Weld Control PC Board Sheet Electrical Diagrams Electrical Diagrams Electrical Diagrams Electrical Diagrams PC Board Assembly Weld Control PC Board RESISTOR,SMD,METAL FILM,1/10W,150OHMSSVM Error Reporting Form