Schematic BY-PASS Printed Circuit Board | Lincoln Electric SVM151-A

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

G-15	ELECTRICAL DIAGRAMS	G-15
SCHEMATIC - BY-PASS PRINTED CIRCUIT BOARD

NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.

MULTI-WELD 350

Image 115

Lincoln Electric SVM151-A service manual Schematic BY-PASS Printed Circuit Board

Contents

Multi-Weld TM 350 Arc Converter California Proposition 65 Warnings Safety Electric Shock can kill Iii Welding Sparks can cause fire or explosion Sûreté Pour Soudage a L’Arc Précautions DE Sûreté Master Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications MULTI-WELD 350 K1735-1 Installation QUICK-CONNECT PIG-TAILS Safety Precautions Case Grounding Work Connection Fixed Parallel Operation Converters Cable Size On Cable AWG mm2 Power Source Setup Table of Contents Operation Section Operation Safety InstructionsOperating Instructions Versatile Product DescriptionPortable Distribution BOX MULTI-SYSTEM Power SourcePIG-TAIL Leads and Connectors Recommended Equipment and Processes CC Mode Stick Welding and Gouging CV Mode Wire WeldingRemote Output Control Options Front Panel Controls Input Power/ Mode Switch has three positions Recessed Panel Controls Cable Handling For CC STICK/GOUGE Mode onlyParalleled Converters Transporting and Storage of the MULTI-WELD Protection Features MULTI-WELD Table of Contents Accessories Section Connection of Lincoln Electric Wire Feeders AccessoriesOPTIONS/ACCESSORIES Semiautomatic Welding Accessories To Work MULTI-WELD Maintenance Section Table of ContentsSection D-1 Maintenance MaintenanceSee additional warning information throughout this manual Figure D.2 Major Component Locations Service MULTI-WELD Table of Contents Theory of Operation Section General Description Theory of Operation Figure E.3 Power Modules and Feedback Power Modules and FEED- Back Analog Control Power Supply Board and Weld Control Board Figure E.5 Mode Selector and Output Controls Mode Selector and Output Controls OVER-VOLTAGE Protection Insulated Gate Bipolar Transistor Igbt Operation 8E-8 Pulse Width Modulation 70-80VDC Chopper Technology Fundamentals MULTI-WELD Table of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & Repair PC Board can be damaged by static electricity PC Board Troubleshooting Procedures Board Test Troubleshooting GuidePower Supply Board Test Perform the DC Buss Supply Voltage Test SpecificationsPerform the Input Contactor Coil Resistance and Supply Test Input Voltage and Resistance Function Problems Tion and Adjustment Test Analog Control Power Supply Board TestSee the Digital Meter Calibra Perform the DC Buss Supply Welding Problems Troubleshooting & Repair Troubleshooting & Repair Test Description Case Cover Assembly Removal Replacement ProcedureMaterials Needed Replacement Procedure Removal Procedure Power Module Capacitor Discharge Procedure Figure F.2 Power Module Capacitor Terminal Discharge Procedure Input Contactor Coil Resistance and Supply Voltage Test Leads #303A #330 Coil Test ProcedurePerform the Power Module Capacitor Discharge procedure Input Contactor Coil Resistance Supply Voltage Test Supply PC Board Test Test for Contact Continuity Analog Control Power Supply PC Board Test Figure F.4 Analog Control Power Supply PC Board Test Procedure Power Supply PC Board Test DC Buss Power Supply PC Board Test P46 P47 DC Buss Power Supply PC Board Table F.2 DC Buss Power Supply PC Board Voltage Table Chopper PC Board Input Voltages and Resistance Test Chopper PC Board Input Voltages Resistance Test Figure F.6 Power Module Assembly Details Power Module Capacitor Discharge Procedure Test Procedure for the Left Side Power Module Scope Settings CC Mode Input Voltage Applied 75 VDCNormal Open Circuit Voltage Waveform CV Mode Output Control AT Maximum Normal Weld Voltage Waveform Machine Loaded to 350 Amps AT 34 Volts CC-STICK Mode Machine Loaded to 350 Amps AT 34 Volts CV Mode CV Mode Output Control AT Minimum Description Case Front Assembly Removal and Replacement Replace the case cover Weld Control or Peripheral PC Board Removal and Replacement Figure F.8 Case Front Assembly Details Replacement Procedure Description Lens Bezel Spacer Seal Knob Digital Meter Removal Procedure Refer to Figure F.9 Output Control Potentiometer Removal Procedure Input Contactor Removal and Replacement Lead #331 Figure F.10 Input Contactor Assembly Details Replacement Procedure Input Diode Removal and Replacement Figure F.11 Input Diode Assembly Details Refer to Figure F.11 25-27 300-324 FAN Motor Assembly Removal and Replacement Figure F.12 FAN Motor Assembly Details Perform the Input Diode Removal proce- dure Perform the Input Diode Replacement procedure Power Capacitor Removal and Replacement Figure F.13 Power Capacitor Mounting Details Reassembly Chopper PC Board and Diode Module Removal and Replacement Removal Chopper PC Board Removal and Replacement Refer to Figure F.14 Replacement Figure F.15 Diode Module Mounting Details Diode Module Removal and Replacement Refer to Figure F.15 Figure F.16 Diode Module Tightening Sequence Load Test Retest After RepairIdle Amps Open Circuit Voltages Table of Contents Electrical Diagrams Section Electrical Diagrams Wiring Diagram MULTI-WELD MULTI-WELD 350 Wiring Diagram Schematic Control PC Board #1 Schematic Control PC Board #2 Schematic Control PC Board #3 Schematic Control PC Board #4 Schematic Control PC Board #5 RESISTOR,SMD,1W,243OHMS,1% PC Board ASSEMBLY-CONTROL Schematic Peripheral Printed Circuit Board PC Board Reference Description Designators PC Board ASSEMBLY-PERIPHERAL Schematic Power Printed Circuit Board Return to Section Return to Section TOC To Section TOC PC Board ASSEMBLY-POWER Schematic Analog Printed Circuit Board PC Board ASSEMBLY-ANALOG Schematic BY-PASS Printed Circuit Board PC Board Assembly BY-PASS 19303 M Schematic Chopper Printed Circuit Board PC Board Assembly Chopper SVM Error Reporting Form