Manuals / Lincoln Electric / Power Tools / Welding System

Lincoln Electric SVM153-A service manual Check Igbt For Shorts

Models: SVM153-A

1 156

Download 156 pages 27.22 Kb

Page 101

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

F-48		F-48
		TROUBLESHOOTING & REPAIR

POWER MODULE TEST (CONTINUED)

FIGURE F.22 – IGBT TEST

HEAT SINK

POSITIVE (+)

CAPACITOR

TERMINAL

CONNECTIONS

Check IGBT For "Shorts"
7. Using the analog ohmmeter, connect the	8. Reverse the meter probe leads. The resis-
positive meter probe to the heat sink and the	tance should be very high (over 50,000
negative meter probe to the positive capaci-	ohms). It the resistance is low in either Step
tor terminal on the Power Module PC board.	7 or 8, the IGBT may be shorted or leaky.
See Figure F.22. The resistance reading
should be high (over 20,000 ohms).

COMMANDER 500

Image 101

Lincoln Electric SVM153-A service manual Check Igbt For Shorts

Contents

CommanderTM California Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications Commander 500 K1639-1 InstallationLocation / Ventilation Safety PrecautionsStoring StackingLifting High Temperature OperationTowing High Altitude OperationPRE-OPERATION Engine Service Spark Arrester Muffler Outlet PipeStandby Power Connections Auxiliary Power ReceptaclesWelding Output Cables Machine GroundingCompany Table of Contents Operation Section Operation Safety InstructionsOperating Instructions General DescriptionRecommended Applications Design Features and AdvantagesWelding Capability Controls and SettingsK1639-1 Commander 500 Standard Model Idler Switch RUN/STOP SwitchStart Pushbutton Fuel Level Gauge and LightWelding Terminals Switch Weld Mode Output ControlTable B.1 Weld Mode and Output Control Functions Hour MeterAuxiliary Power Controls Starting the Engine Engine OperationBREAK-IN Period Typical Fuel ConsumptionStick Welding Welder OperationConstant Current CC Welding TIG WeldingCommander 500 Settings When Using the K930-1 TIG Module Commander 500 Settings When Using the K799 HI-FREQ UnitTable B.3 Typical Current RANGES1 for Tungsten ELECTRODES2 TIG TorchWire Feed Constant Voltage Welding Auxiliary Power OperationSimultaneous Welding and Auxiliary Power Loads ARC GougingPermissible Permissible Auxiliary Extension Cord RecommendationsTable of Contents Accessories Section OPTIONS/ACCESSORIES AccessoriesField Installed Options Stick Welding AccessoriesConnection of Lincoln Electric Wire Feeders Semiautomatic Welding AccessoriesOther Wire Feeders for the Commander 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 Routine and Periodic Maintenance MaintenanceEngine Maintenance DailyFigure D.1 OIL Drain and Refill Fuel Filters Figure D.2 Fuel PRE-FILTER/WATER Separator AssemblyFigure D.3 Secondary Fuel Filter AIR Filter Maintenance Table D.2 Engine Maintenance Parts Manufacturer Part Number Frequency Maintenance RequiredConnecting a Battery Charger Battery MaintenanceWELDER/GENERATOR Maintenance Figure D.5 Major Component Locations Table of Contents Theory of Operation Section CommanderTheory of Operation CommanderWeld WINDINGS, RECTIFIER, Power Modules and Feedback Analog Control Power Supply Board and Weld Control Board Insulated Gate Bipolar Transistor Igbt Operation 6E-6 Pulse Width ModulationMinimum Output Maximum Output70-80VDC External DC Solid State Inductor ARC Source Switch DiodeChopper Technology Fundamentals Section F-1 Table of ContentsTroubleshooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & RepairPC Board can be damaged by static electricity PC Board Troubleshooting ProceduresDetailed 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 Symptoms Misadjustments Course of Action Problems Possible AreasEngine Starting Diagnostic Chart Return START-UP and OCV Diagnostic ChartMaterials Needed Case Cover Removal and Replacement ProcedureDescription Procedure Case Cover Removal Replacement ProcedureFigure F.1 Removal Case Front Knobs Removal and Replacement ProcedurePower Module Capacitor Discharge Procedure Procedure Test Description Idler Solenoid TestFigure F.5 Idler Solenoid Leads Test ProcedureShutdown Solenoid Test Figure F.6 Shutdown Solenoid Lead Terminals Engine Throttle Adjustment Test Strobe-tach Method Figure F.7 Strobe Mark Location Mark Blower Paddle HereLocking NUT Oscilloscope Method 28F-28Frequency Counter Method Rotor Resistance Test Test Procedure Flashing and Rotor Voltage Test Lead # 201A 10 11 12 13 14 15Troubleshooting & 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 Weld Winding Lead Connections W6W1Analog Power Supply PC Board Voltage Test J41 Control Circuit Input Power40F-40 Test Points Component Tested Voltage Reading Analog Control Power Supply PC Board TestOutput 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 Check Diode Module When all tests are completeCharging Circuit Test #239 #281 #238 Figure F.24 Engine Alternator LocationNormal Open Circuit Voltage Waveform 115VAC Supply Scope SettingsHigh Idle no Load 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 MAX Control POT High Idle no Load Normal Open Circuit Voltage Waveform Wire CV TAPShutdown Solenoid Removal and Replacement Figure F Shutdown Solenoid Lead Connections Figure F Shutdown Solenoid Linkage ARM Assembly ReassemblyDescription Control Panel Removal Screws Front Green Ground Lead Figure F Power Module Capacitor Lead Removal Troubleshooting & Repair Replacement Procedure Description Figure F.30 Power Module PC Board Power Module PC Board RemovalPower Module PC Board Replacement Diode Module Removal Diode Module ReplacementOutput Rectifier Bridge Diode Removal and Replacement Refer to Figure F.32 Turn the engine off Diode Stud Size Foot Pounds Inch Pounds Return Section TOCSTATOR/ROTOR Removal and Replacement Plug Fuel Lines Bolts Preparation and Lead Removal ProcedureLeads #229 #242D Filter Field Diode Capacitor #200D #5P #201 #201A#232M Figure F.35 Brush Holder and Lead RemovalFigure F.37 Alternator Shroud Removal Screws Acoustical Foam Figure F.38 Lift Frame and Associated Component Removal Figure F.39 Stator Removal Stator Removal ProcedureReassembly Notes Rotor Removal ProcedureOutput Panel and Control BOX Lead Reconnection ChecklistEngine Retest After Repair Welder CV Wire OutputEngine RPM Welder DC Stick OutputAuxiliary Power Output Touch Start TIG Mode OutputTable of Contents Electrical Diagrams Section Electrical DiagramsElectrical Diagrams G3834 Schematic Complete Machine CommanderSchematic Battery PC Board Return to Section PC Board Assembly Battery PC BoardPWM Input Schematic Chopper PC BoardReturn to Section Return to Section TOC PC Board Assembly Chopper PC BoardSchematic Peripheral PC Board Return to Section PC Board Assembly Peripheral PC BoardSchematic Power Supply Analog PC Board PC Board Reference QTY Designators Description PC Board Assembly Power Supply Analog PC BoardSchematic PULL-COIL PC Board MOSFET/HEATSINK ASBLY,T12704-82&S1810 PC Board Assembly PULL-COIL PC BoardSchematic Weld Control PC Board Sheet Electrical Diagrams Electrical Diagrams Electrical Diagrams Electrical Diagrams RESISTOR,SMD,METAL FILM,1/10W,150OHMS PC Board Assembly Weld Control PC BoardSVM Error Reporting Form