39TROUBLESHOOTING & REPAIRF-39 | Lincoln Electric SVM162-B manual

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F-39TROUBLESHOOTING & REPAIRF-39

TYPICAL OUTPUT VOLTAGE WAVEFORM - MACHINE LOADED TO 2 AMPS

DC - TIG MODE

HIGH VOLTAGE/ HIGH FREQUENCY can damage test equipment.

Perform all voltage and waveform checks with high frequency circuit OFF.

Perform High Frequency Disable Procedure.

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20V

5 ms

AC BALANCE CONTROL IN “AUTO”

OUTPUT CONTROL AT MINIMUM

This is the typical AC output voltage

waveform generated from a properly

operating machine. Note that each ver-

tical division represents 20 volts and

that each horizontal division represents

5 milliseconds in time.

NOTE: Scope probes connected at

machine output terminals: (+) probe to

electrode, (-) probe to work.

SCOPE SETTINGS

Volts/Div

20V/Div.

Horizontal Sweep

5 ms/Div.

Coupling

DC

Trigger

Internal

PRECISION TIG 275

0V

Image 85

Lincoln Electric SVM162-B 39TROUBLESHOOTING & REPAIRF-39, Typical Output Voltage Waveform Machine Loaded to 2 Amps

Contents

Precision TIG Safety Depends on You Powered equipment SafetyFor Engine Mar ʻ95 Fumes and Gases ARC Rays can burnAug ʻ06 Cylinder may explode If damaged Welding Sparks canIii Précautions DE Sûreté Pour Précautions DE SûretéLES Machines À Souder À Transformateur ET À Master Table of Contents for ALL Sections Table of Contents Installation Section Unbalance 70% Penetration AC TIG 16.1 255 60% 29.0 225 InstallationUnbalance 70% Penetration AC TIG 15.4 200 100% 28.0 Unbalance 70% Penetration AC TIG 14.8 150 Maximum Open Output Current Protection Safety PrecautionsSelect Suitable Location Disconnect switch or fuse box Turn the input power OFF atBefore working on this equip Ment Work Cable Connection Figure A.2 Figure A.3 Auxiliary Power Connections Figure A.4 Robotic Interface Connection Return to Section TOC Table of Contents Operation Section Product Description OperationPipe Thawing Equipment Recommended Processes When the Power Source is on Controls and SettingsStick mode the Electrode circuits Both the Stick and TIG torch cables Maximum Output Control The large knob AC Balance Ontrol TIG Mode Menu Menu Button and Display Switch CodesOperation for Codes Above 11000 only Select Gure B.3 Advanced Panel Controls Time Control PULSE% on Pulse Frequency ControlPulse Background Current Control TIG Welding Features Internal SET UP ControlsStick Welding Features Step Trigger Modes Figure B.4 Codes below 11000 K1829-1 TIG Weld Cycle Chart Figure B.6 Setup Guidelines for TIG Welding With AN Amptrol Recommended Electrode Amperage Ranges Precision TIG Making a TIG Weld with AN AmptrolSmaw Process Gtaw Process Table of Contents Optional Equipment Accessories for Codes belowMagnum PTA and PTW Series Torches Accessories for Codes Above Return to Section TOC Component Location and Access Maintenance Overload Protection Safety Precautions Spark GAP Adjustment Service ProceduresUNDER-COOLER Service Warni Table of Contents Theory of Operation Section Theory of Operation Input Power CircuitGeneral Description Control board also monitors the thermostats Output RectificationSee SCR Operation Figure E.4 High Voltage / High Frequency Circuit High VOLTAGE/HIGH Frequency Circuit Figure E.5 DC Welding Output DC Welding Output Figure E.7 AC Welding Output AC Welding Output Figure E.9 SCR Operation SCR Operation Protection Circuits 8THEORY of OPERATIONE-8FAN-AS-NEEDED F.A.N Thermal Protection Table of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide 2TROUBLESHOOTING & REPAIRF-2 Troubleshooting & Repair Procedure Troubleshooting GuideReconnect Test Transformer Control BoardSCR Bridge Test Machine functions normally Installed, remove it and replacePerform the Protection Board T1 Transformer Protection Board See Note belowPerform the T1 Transformer Perform the SCR Bridge Test Perform the SCR Bridge Tests Perform the Gas Solenoid Test Est Electric Shock MaintenanceCan Kill High frequency transformer Maintenance Section Symptoms Misadjustments Course of Action Problems Possible AreasSee the Maintenance Secti To Technical Specifications Stick electrode blasts-off Welding current may be too high Stick Welding Problems Function Problems Be plugged into J3 Installation Manual Display switch may be faulty Precision TIG Meter Calibration Adjustments 19TROUBLESHOOTING & REPAIRF-19Voltmeter/Ohmmeter Nut Driver Wiring Diagram Description Meter Calibration Adjustments 20TROUBLESHOOTING & REPAIRF-20Calibration Check Ammeter Calibration Procedure 21TROUBLESHOOTING & REPAIRF-21Control board. See Figure F1 Return to Section TOC High Frequency Circuit Disable Procedure 23TROUBLESHOOTING & REPAIRF-23Nut Driver Electrical Insulating Tape High Frequency Circuit Disable Procedure 24TROUBLESHOOTING & REPAIRF-24Procedure Protection Board Test 25TROUBLESHOOTING & REPAIRF-25Test Description Resistance Between Reading Protection Board Test T1 Main Transformer Test 27TROUBLESHOOTING & REPAIRF-27 Test Procedures 28TROUBLESHOOTING & REPAIRF-28T1 Main Transformer Test Primary Windings Test Points Acceptable Voltages Return to Section TOC GAS Water Solenoid Test 31TROUBLESHOOTING & REPAIRF-31 Disable Procedure Test ProcedureGAS Water Solenoid Test Perform the High Frequency Circuit Static SCR Test 33TROUBLESHOOTING & REPAIRF-33 Removal and Replacement 34TROUBLESHOOTING & REPAIRF-34Assembly. See SCR Bridge Assembly Static SCR Test Active SCR Test Service and repair Active SCR Test 36TROUBLESHOOTING & REPAIRF-36 Active SCR Test Figure F.9 SCR Gate Locations DC TIG Mode 39TROUBLESHOOTING & REPAIRF-39Scope Settings Typical Output Voltage Waveform Machine Loaded to 2 Amps AC TIG Mode 40TROUBLESHOOTING & REPAIRF-40Milliseconds in time. The machine Was loaded with a resistance grid bank Typical AC Voltage Waveform Machine Loaded to 50 Amps 41TROUBLESHOOTING & REPAIRF-41This is the typical DC + output voltage Horizontal Sweep Ms/Div Typical AC Voltage Waveform Machine Loaded to 2 Amps 42TROUBLESHOOTING & REPAIRF-42AC Balance Control in Auto Output Control AT Minimum 43TROUBLESHOOTING & REPAIRF-43 Return to Section TOC High Voltage Transformer Removal and Replacement 45TROUBLESHOOTING & REPAIRF-45Nut Driver Phillips Head Screwdriver Off-set Wire Cutters Removal and Replacement 46TROUBLESHOOTING & REPAIRF-46Removal Procedure Replacement Procedure Figure F.11 3/8 Screw & Leads S and F Locations 47TROUBLESHOOTING & REPAIRF-47 Return to Section TOC Control Board Removal and Replacement 49TROUBLESHOOTING & REPAIRF-49Nut Driver Phillips Head Screwdriver Wire Cutters Control Board Removal and Replacement 50TROUBLESHOOTING & REPAIRF-50 J10 J11 J12 51TROUBLESHOOTING & REPAIRF-51 Return to Section TOC SCR Bridge Assembly Removal and Replacement 53TROUBLESHOOTING & REPAIRF-53Nut Driver Pliers Crimp Wire Cutters SCR Bridge Assembly Removal and Replacement 54TROUBLESHOOTING & REPAIRF-54See Figure F.14 SCR Bridge Removal and Replacement Diode Stud Foot Inch Size Pounds Mounting of Stud Type Diodes to Aluminum Heat Sinks CONT’D25-27 300-324 10±.5 125+0/-5 22-25 Polarity Switch Removal and Replacement 57TROUBLESHOOTING & REPAIRF-57 Polarity Switch Removal and Replacement 58TROUBLESHOOTING & REPAIRF-58 SCR Removal and Replacement 59TROUBLESHOOTING & REPAIRF-59 SCR Removal and Replacement 60TROUBLESHOOTING & REPAIRF-60Special Instructions Input Idle Amps Retest After RepairOpen Circuit Voltages Recommended Meters for Machine Output Tests Return to Section TOC Control P.C. Board Schematic Electrical Diagrams Section Section G Wiring Diagram Entire Machine Code 10806 G4031 Electrical Diagrams SCR2 Wiring Diagram Entire Machine Code 10807 G4031-1 Wiring Diagram Entire Machine Code 10893 G4031-2 Precision TIG 275 Wiring Diagram Precision TIG 275 Wiring Diagram Wiring Diagram Entire Machine Code 11158 G5692Schéma DE Câblage Diagramas DE Cableado Robotic Interface Connection Connexion Interface Robotique Wiring Diagram Entire Machine Code 11159 G5692-1 Return to Section Schematic Entire Machine below Code 11000 G4075 Change Detail Released from X A.02 Schematic Entire Machine Above Code 11000 G5691 Schematic Control PC Board below Code 11000 G3908 Electrical Diagrams Electrical Diagrams G3909 PC Board ASSEMBLY-CONTROL below Code 11000 G3909-2 Schematic Control PC Board Above Code 11000 G4762 Electrical Diagrams Electrical Diagrams Electrical Diagrams Electrical Diagrams G4763 PC Board ASSEMBLY-CONTROL Above Code 11000 G4763-1 16115 M SCHEMATIC-PROTECTION P.C. Board M16115 Reqd Identification PC Board ASSEMBLY-PROTECTION M16062-1 SCHEMATIC-BYPASS / Stabilizer P.C. Board S22530-1 Code 10806 L10121-1 PC Board ASSEMBLY-BYPASS / Stabilizer L10121-1 Code 10806 Frame Ground SCHEMATIC-BYPASS and CE P. C. Board S24206 Code Bottom View PC Board ASSEMBLY-BYPASS and CE L10882-1 Code Schematic TIG Option P.C. Board below Code 11000 G4039 Electrical Diagrams Return to Section TOC To Section TOC Schematic TIG Option P.C. Board Above Code 11000 G4760 Electrical Diagrams Electrical Diagrams MAK E Detail SVM Error Reporting Form