Lincoln Electric SVM151-A service manual Multi-Weld TM 350 Arc Converter

Page 1

Return to Master TOC

Return to Master TOC

Return to Master TOC

pReturn to Master TOC

View Safety Info

View Safety Info

View Safety Info

View Safety Info

RETURN TO MAIN INDEX

SVM151-A

September, 2002

Multi-Weld TM 350 Arc Converter

For use with machines having Code Numbers: 10645 10736

Safety Depends on You

Lincoln arc welding and cutting equipment is designed and built with safety in mind. However, your overall safety can be in- creased by proper installation . . .

and thoughtful operation on your part. DO NOT INSTALL,

OPERATE OR REPAIR THIS

EQUIPMENT WITHOUT

READING THIS MANUAL AND

THE SAFETY PRECAUTIONS

CONTAINED THROUGHOUT.

And, most importantly, think before you act and be careful.

SERVICE MANUAL

Copyright © 2000 Lincoln Global Inc.

• World's Leader in Welding and Cutting Products •

• Sales and Service through Subsidiaries and Distributors Worldwide •

Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com

Image 1

Contents Multi-Weld TM 350 Arc Converter 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 MULTI-WELD 350 K1735-1 InstallationQUICK-CONNECT PIG-TAILS Safety PrecautionsCase Grounding Work ConnectionFixed Parallel Operation Converters Cable Size On Cable AWG mm2 Power Source SetupTable of Contents Operation Section Operation Safety InstructionsOperating Instructions Versatile Product DescriptionPortable PIG-TAIL Leads and Connectors MULTI-SYSTEM Power SourceRecommended Equipment and Processes Distribution BOXCC Mode Stick Welding and Gouging CV Mode Wire WeldingRemote Output Control Options Front Panel Controls Input Power/ Mode Switch has three positionsRecessed Panel Controls Paralleled Converters For CC STICK/GOUGE Mode onlyTransporting and Storage of the MULTI-WELD Cable HandlingProtection Features MULTI-WELD Table of Contents Accessories Section OPTIONS/ACCESSORIES AccessoriesSemiautomatic Welding Accessories Connection of Lincoln Electric Wire FeedersTo Work MULTI-WELD Maintenance Section Table of ContentsSection D-1 Maintenance MaintenanceSee additional warning information throughout this manual Figure D.2 Major Component Locations ServiceMULTI-WELD Table of Contents Theory of Operation Section General Description Theory of OperationFigure E.3 Power Modules and Feedback Power Modules and FEED- BackAnalog Control Power Supply Board and Weld Control Board Figure E.5 Mode Selector and Output Controls Mode Selector and Output ControlsOVER-VOLTAGE Protection Insulated Gate Bipolar Transistor Igbt Operation 8E-8 Pulse Width Modulation70-80VDC Chopper Technology FundamentalsMULTI-WELD Table of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & RepairPC Board can be damaged by static electricity PC Board Troubleshooting ProceduresPower Supply Board Test Troubleshooting GuidePerform the DC Buss Supply Board TestPerform the Input Contactor SpecificationsCoil Resistance and Supply Voltage TestTest Input Voltage and ResistanceFunction 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 ProcedurePower Module Capacitor Discharge Procedure Figure F.2 Power Module Capacitor Terminal Discharge ProcedureInput Contactor Coil Resistance and Supply Voltage Test Perform the Power Module Capacitor Discharge procedure Coil Test ProcedureInput Contactor Coil Resistance Supply Voltage Test Leads #303A #330Supply PC Board Test Test for Contact ContinuityAnalog Control Power Supply PC Board Test Figure F.4 Analog Control Power Supply PC Board Test ProcedurePower Supply PC Board Test DC Buss Power Supply PC Board Test P46 P47 DC Buss Power Supply PC BoardTable 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 DetailsPower Module Capacitor Discharge Procedure Test Procedure for the Left Side Power ModuleScope 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 ModeMachine Loaded to 350 Amps AT 34 Volts CV Mode CV Mode Output Control AT Minimum Description Case Front Assembly Removal and ReplacementReplace 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 ProcedureRefer to Figure F.9 Output Control Potentiometer Removal ProcedureInput Contactor Removal and Replacement Lead #331 Figure F.10 Input Contactor Assembly DetailsReplacement Procedure Input Diode Removal and Replacement Figure F.11 Input Diode Assembly Details Refer to Figure F.11 25-27 300-324FAN Motor Assembly Removal and Replacement Figure F.12 FAN Motor Assembly Details Perform the Input Diode Removal proce- dure Perform the Input Diode Replacement procedurePower 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 ReplacementRefer to Figure F.14 ReplacementFigure F.15 Diode Module Mounting Details Diode Module Removal and ReplacementRefer to Figure F.15 Figure F.16 Diode Module Tightening Sequence Idle Amps Retest After RepairOpen Circuit Voltages Load TestTable of Contents Electrical Diagrams Section Electrical DiagramsWiring Diagram MULTI-WELD MULTI-WELD 350 Wiring DiagramSchematic 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-CONTROLSchematic Peripheral Printed Circuit Board PC Board Reference Description Designators PC Board ASSEMBLY-PERIPHERALSchematic Power Printed Circuit Board Return to Section Return to Section TOC To Section TOC PC Board ASSEMBLY-POWERSchematic 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 BoardPC Board Assembly Chopper SVM Error Reporting Form