Schematic Complete Machine G3575 | Lincoln Electric SVM188-A

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G-4	ELECTRICAL DIAGRAMS	G-4
SCHEMATIC - COMPLETE MACHINE - G3575
Printed by John Howell	Printed at 10:20 on 08/15/2008 (month/day/year)	Drawing Number- G3575

Revision- 12-17-99

Status- STANDARD

This print is Current

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

Image 94

Lincoln Electric SVM188-A service manual Schematic Complete Machine G3575

Contents

DC-600 ISAFETYi Fumes and Gases SafetyElectric Shock can kill Can be dangerous Powered equipment For Electrically Précautions DE Sûreté Sûreté Pour Soudage a L’Arc Electromagnetic Compatibility EMC Safety Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications DC-600 Electric Shock can Kill Safety PrecautionsSelect Proper Location Electrical Input Connections Fuse and Wire SizesGround Connection Reconnect Procedure Connection for Highest Rating Plate VOLTAGE, 50 or 60 HZ Connection for 440 Volts 50 or 60 HZ V 60HZ See Machine Rating Plate for Required Input Supply Voltage ELECTRODE, Work and #21 Lead Output ConnectionsConnections Terminal Strip 1 T.S.1 Auxiliary Power Control ConnectionsTerminal Strip 2 T.S.2 DC-600 Table of Contents Operation Section Safety Precautions Operation General Description Design Features AdvantagesRecommended Processes and Equipment Welding Capability Meanings of Graphical Symbols on Case FrontOFF Input Power Output Control Output Voltage Current Meaning of Graphical Symbol for Ground CON- Nection Controls and Settings Auxiliary Power in MS-RECEPTACLE OVERLOAD, OVERCURRENT, and Fault Protection Welding Procedure Recommendations Remote Control of Machine OperationOperating Steps NA-3 Automatic Wire Feeder Remote LN-8 or LN-9 SEMI-AUTOMATIC Wire Feeder LN-7 and Other Constant Wire Feeders DC-600 Table of Contents Accessories Section Factory or Field Installed Options AccessoriesWire Feeders and Tractors Field Installed Options Figure C.2 MULTI-PROCESS Switch Cable Connections Accessories Table of Contents Maintenance Section Safety Precautions Electric Shock can Kill MaintenanceRoutine and Periodic Maintenance 1TABLE of CONTENTS-THEORY of Operation Section E-1 Theory of Operation Input Circuit and Main TRANS- Former Rectification Firing CIRCUIT, Control CIR- Cuit and RectificationFiring Board Thermal Protection SCR Operation DC-600 1TABLE of Contents Troubleshooting and Repair F-1 2TROUBLESHOOTING and REPAIRF-2 HOW to USE Troubleshooting Guide Troubleshooting and Repair PC Board Troubleshooting Procedures Control Feeder. See Protective Devices Check all three phase input Output Control J1,Pin2. See Wiring Diagram Wiring Diagram Test Description PC Board Troubleshooting GuideMaterials Needed PC Board Troubleshooting Guide Control Board Figure F.2 Control Board LEDs DC-600 Internal Trigger Circuit Test Procedure Internal Trigger Circuit Test Internal Trigger Circuit Test 75 76 DC-600 Firing Board Test Firing Board Test Control Board Test Control Board Test Figure F.7 Control Board Main Transformer Voltage Test Main Transformer Voltage Test Figure F.8 Input Contactor and Reconnect Panel Figure F.9 Transformer Secondaries Main Transformer Voltage Test Control Transformer Test Procedure Control Transformer Test Input Contactor Test Input Contactor Test Voltage Test SCR Bridge Test Anode Cathode Remove Insulating Paint SCR Bridge Test Active Test Scope Settings Maximum Output Setting no Load Minimum Output Setting no Load 35TROUBLESHOOTING and REPAIRF-35 2V/Div Volts DC-600 Input Contactor CR1 CLEANING/REPLACEMENT Cleaning Procedure Input Contactor CLEANING/REPLACEMENT ProcedureContactor Replacement Procedure SCR Rectifier Bridge Removal and Replacement Procedure Removal Procedure 42TROUBLESHOOTING and REPAIRF-42Removal and Replacement Procedure SCR Rectifier Bridge Replacement Procedure Insulator Lock Washer Plain Washer Output Snubber Lead DC-600 Main Transformer and Choke Removal and Replacement Removal and Replacement Main Transformer and Choke Removal Procedure Weld Input Idle Amps and Watts Maximum Open Circuit Voltages DC-600 Table of Contents Diagram Section Electrical Diagrams Wiring Diagram 230/460/575 Volt Machines G3506-1 Schematic Complete Machine G3575 Schematic Control PC Board G3408-1 Control PC Board Assembly G3409-1 Schematic Firing PC Board G3741-1