Lincoln Electric SVM207-A service manual Normal Open Circuit DC Weld Voltage Waveform CC Mode

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F-36	TROUBLESHOOTING AND REPAIR	F-36
F-36		F-36

NORMAL OPEN CIRCUIT DC WELD VOLTAGE WAVEFORM (CC MODE)

HIGH IDLE - NO LOAD - OUTPUT CONTROL AT MAXIMUM

CH1

50 volts

5 ms

This is the typical DC output voltage generated from a properly operating machine. Note that each vertical divi- sion represents 50 volts and that each horizontal division represents 5 mil- liseconds in time.

Note: Scope probes connected at machine 115VAC receptacle.

SCOPE SETTINGS

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

RANGER® 3 PHASE

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Contents Ranger 3 Phase Safety Ranger 3 PhaseFumes and Gases Welding Cutting Précautions DE Sûreté Safety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Auxiliary Power InstallationTechnical Specifications Ranger 3 Phase K2337-1 & K2337-2 Height Width Depth WeightSpark Arrester Safety PrecautionsMachine Grounding TowingVehicle Mounting PRE-OPERATION ServiceGasoline Can cause fire or explosionHigh Altitude Operation Welding Output CablesTotal Combined Length of Electrode and Work Cables Angle of OperationInstructions Gfci Duplex Receptacles Auxiliary PowerVolt 3 Phase Receptacle with Ground 120/240 Volt Dual Voltage ReceptacleAuxiliary Power While Welding Ground WireStandby Power Connections TABLE A.1 Simultaneous Welding and PowerConnection of Ranger 3 Phase to Premises Wiring Figure A.3Devices Without Addi Tional Resistive Type Loads Electrical Device USE with the Ranger 3 PhaseUSE These Devices with a Ranger 3 Phase Table of Contents Operation Section GENERAL DESCRIPTION Engine SwitchOperation Welder Controls Function and OperationRange Switch Polarity SwitchRanger 3 Phase Approximate Fuel Consumption Control DialStick Constant Current Welding Wire Feed Welding Processes Constant VoltageWelding Process TIG Constant Current WeldingStick Auto Starting the Engine STARTING/SHUTDOWN InstructionsBREAK-IN Period Stopping the EngineTable of Contents Accessories Section Accessories K1745-1 Welding GAS Cylinder LPG Tank HolderStick WIRE FEEDRECOMMENDED EQUIPMENT TIGRanger 3 Phase Table of Contents Maintenance Section Maintenance Safety PrecautionsOIL Filter Change Gfci Receptacle Testing and RESET- Ting ProcedureAIR Cleaner and Other Maintenance Slip Rings Do not attempt to polish slip rings while engine is runningFram CA79 BatteryEngine Maintenance Parts KOHLER C23S CHAMPION RC12YCMAINTENANCED-5 Figure D.1 Major Component LocationRanger 3 Phase 1TABLE of CONTENTS-THEORY of Operation Section E-1 Engine Components and Operation Theory of OperationGeneral Description ROTOR, Stator & Control Circuits Figure E.2 ROTOR, Stator and Control CircuitsWeld Circuitry Figure E.2 Weld Circuitry1TABLE of Contents Troubleshooting and Repair F-1 Troubleshooting and Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Return to SectionDiagram Perform the Output Bridge Test Gram Wiring Wiring Diagram Troubleshooting and Repair Figure F.4 and/or the Wiring Materials Needed Rotor Voltage Test ProcedureTest Description Test Procedure Rotor Voltage TestRotor Resistance Test TEST PROCEDURE Figure F.2 Slip RingsAuxiliary and Field Winding Test Auxiliary Windings To test the 480 VAC 3 Phase windingProbes Reading To test the 120 VAC windingFigure F.4 Control PC Board Field WindingRanger 3 Phase Output Rectifier Bridge Test Figure F.5 OUTPUT RECTIFIER + Meter Lead Meter ReadingToroid Test Toroid Test Charging Circuit Test Voltage Regulator AC Lead DC Lead Engine Throttle Adjustment Test Engine Throttle Adjustment Test Low Idle Adjustment SolenoidNut Housing Figure F.9 115VAC Supply Waveform High IDLE- no Load High Idle no Load Output Control AT Maximum Scope SettingsNormal Open Circuit Voltage Waveform 115 VAC Supply Typical DC Weld Output Waveform CV Mode Machine LoadedTypical DC Weld Output Waveform CC Mode Machine Loaded to 200 Amps AT 26 VDCTypical AC Weld Output Waveform Machine Loaded to 225 Amps AT 25 VDC Abnormal Open Circuit Weld Voltage Waveform CV Mode Abnormal Open Circuit DC Weld Voltage Waveform Normal Open Circuit Weld Voltage Waveform CV Mode Normal Open Circuit DC Weld Voltage Waveform CC Mode Normal Open Circuit AC Weld Voltage Waveform Ranger 3 Phase Brush Removal and Replacement Procedure Brush Removal and Replacement Procedure ProcedureBrush Assembly Bracket Bolts Ranger 3 Phase Printed Circuit Board Removal Replacement Procedure Printed Circuit Board Removal Figure F.10 Door RemovalOutput Rectifier Bridge Removal Replacement Procedure Output Rectifier Bridge Removal Figure F.11 OUTPUT RECTIFIERENGINE/ROTOR Removal and Replacement Procedure ENGINE/ROTOR Removal and Replacement Procedure Procedure Rotor Removal Procedure Figure F.13 Engine and Rotor Removed from StatorReassembly Procedure Retest After Repair Table of Contents Diagram Section Ranger 3-PHASE RaNGEr 3 phaSESchEmaTic cOmplETE machiNE l12259 L12259ElEcTrical DiaGramS