Lincoln Electric SVM149-A service manual Table of Contents Troubleshooting & Repair Section

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Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Section F-1	Section F-1
TABLE OF CONTENTS
TROUBLESHOOTING & REPAIR SECTION
Troubleshooting & Repair Section	Section F
How to Use Troubleshooting Guide	F-2
PC Board Troubleshooting Procedures and Replacement	F-3
Troubleshooting Guide	F-4
Test Procedures
Input Filter Capacitor Discharge Procedure	F-9
Main Inverter Board Resistance Test	F-11
Input Board Voltage Test	F-17
Main Inverter Board Voltage Test	F-21
Torch Continuity and Solenoid Test	F-25
Air/Gas Solenoid Test	F-29
Replacement Procedures
Control Board Removal and Replacement	F-31
Input Board Removal and Replacement	F-35
Main Inverter Board Removal and Replacement	F-39
Switch Removal and Replacement	F-43
Fan Removal and Replacement	F-45
Retest after Repair	F-48

PRO-CUT 25

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Contents PRO-CUT Safety Cylinder may explode if damaged Précautions DE Sûreté SafetyMaster Table of Contents for ALL Sections PRO-CUT Installation Section Table of ContentsTechnical Specifications PRO-CUT 25 K1756-1 InstallationInput Electrical Connections Safety Precautions Electric Shock can KillSelect Proper Location High Frequency Interference ProtectionGAS Input Connections Torch Output ConnectionsPRO-CUT Table of Contents Operation Section Description Safety PrecautionsPreheat Temperature for Plasma Cutting OperationUser Responsibility Operational Features and ControlsDesign Features Advantages Consumable Life Cutting CapabilityLimitations Controls and SettingsPilot ARC Discussion Apparently wrong, reset the machine by turningGeneral In All Cases Procedure RecommendationsPRO-CUT Accessories General Options Accessories Maintenance Electric Shock can kill Routine MaintenancePRO CUT PRO-CUT Table of Contents Theory of Operation Section Input Line VOLTAGE, and Auxiliary Transformer Theory of OperationGeneral Description Figure E.3 Precharge and Protection Precharge and ProtectionReturn Return to Section TOC Main TransformerFigure E.5 Plasma Output Section and Torch Figure E.6 Control Board Control BoardAccidental Operation Protection Safety PARTS-IN-PLACE ProtectionProtection Circuits Insulated Gate Bipolar Transistor Igbt Operation Table of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & RepairPC Board Troubleshooting Procedures Output Problems Function Problems See the Operation section Troubleshooting & Repair LED Function Problems Description Input Filter Capacitor Discharge ProcedureRight Side of Machine Discharge ProcedureMain Inverter Board Resistance Test Right Side of Machine IGBT’s D2 D1 D11 D10 PRO-CUT Input Board Voltage Test Test Points Fan PRO-CUT Main Inverter Board Voltage Test P2 P1 P2 P1 PRO-CUT Torch Continuity and Solenoid Test Torch Continuity and Solenoid Test Torch Continuity and Solenoid Test PRO-CUT AIR/GAS Solenoid Test AIR/GAS Solenoid Test Control Board Removal and Replacement Small Red Cap Screws Over tighten Input Board Removal and Replacement Input Board Input Board Removal & Replacement PRO-CUT Main Inverter Board Removal and Replacement Main Board Main Inverter Board Removal & Replacement PRO-CUT Switch Removal and Replacement PRO FAN Removal and Replacement Fan Do Not Over tighten Machine Input and Output Retest After RepairTable of Contents Electrical Diagrams Section Electrical DiagramsInput Voltage Board Pressure SCHEMATIC- Control Printed Circuit Board Sheet Electrical Diagrams Electrical Diagrams PC Board Assembly Main Inverter Board PC Board Assembly Input Board Cutting Current Path SVM Error Reporting Form