Lincoln Electric SVM188-A service manual Accessories

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C-4

ACCESSORIES

C-4

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12.Connect stick or air/carbon arc electrode and work cable. See Figure C.2.

•Insert the electrode and work cables through the strain relief loop on the right side (facing the front of the machine) of the DC-600.

•Connect the electrode cable to the "Positive" ter- minal on the right side of the MULTI-PROCESS SWITCH.

•Connect the work cable to the "Negative" terminal on the right side of the MULTI-PROCESS SWITCH.

NOTE: The instructions above are for connecting the stick polarity positive. To change the polarity, turn the DC-600 OFF, and reverse the cables.

NOTE: When it is not necessary to have separate ground cables for stick and semi-automatic or automatic welding, connect a jumper from the MULTI-PROCESS SWITCH "Work" terminal to the MULTI-PROCESS SWITCH "negative" terminal. See Figure C.2.

To operate the MULTI-PROCESS SWITCH, refer to the operating instructions on the switch nameplate.

CONNECTIONS FOR SEMI-AUTO- MATIC OR AUTOMATIC WIRE FEED- ER CONTROL

1.Set the DC-600 ON/OFF switch to OFF.

2.Set the DC-600 LOCAL/REMOTE switch to

REMOTE.

3.Set the DC-600 OUTPUT TERMINALS switch to

REMOTE.

4.Set the DC-600 MODE switch to the welding process being used.

5.Refer to the proper connection diagram in the DIA- GRAMS section for more information.

DC-600

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Contents DC-600 ISAFETYi Safety Electric Shock can killFumes and Gases Can be dangerousPowered equipment For ElectricallyPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcElectromagnetic Compatibility EMC Safety Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications DC-600Select Proper Location Safety PrecautionsElectric Shock can Kill Ground Connection Fuse and Wire SizesElectrical Input Connections Reconnect Procedure Connection for Highest Rating Plate VOLTAGE, 50 or 60 HZConnection for 440 Volts 50 or 60 HZ V 60HZ See Machine Rating Plate for Required Input Supply Voltage Connections Output ConnectionsELECTRODE, Work and #21 Lead Terminal Strip 2 T.S.2 Auxiliary Power Control ConnectionsTerminal Strip 1 T.S.1 DC-600 Table of Contents Operation Section Safety Precautions OperationRecommended Processes and Equipment Design Features AdvantagesGeneral Description Meanings of Graphical Symbols on Case Front OFF Input PowerWelding Capability Output Control Output Voltage CurrentMeaning of Graphical Symbol for Ground CON- Nection Controls and SettingsAuxiliary Power in MS-RECEPTACLE OVERLOAD, OVERCURRENT, and Fault ProtectionOperating Steps Remote Control of Machine OperationWelding Procedure Recommendations NA-3 Automatic Wire Feeder RemoteLN-8 or LN-9 SEMI-AUTOMATIC Wire Feeder LN-7 and Other Constant Wire FeedersDC-600 Table of Contents Accessories Section Accessories Wire Feeders and TractorsFactory or Field Installed Options Field Installed OptionsFigure C.2 MULTI-PROCESS Switch Cable Connections Accessories Table of Contents Maintenance Section Routine and Periodic Maintenance MaintenanceSafety Precautions Electric Shock can Kill 1TABLE of CONTENTS-THEORY of Operation Section E-1 Theory of Operation Input Circuit and Main TRANS- FormerFiring Board Firing CIRCUIT, Control CIR- Cuit and RectificationRectification Thermal Protection SCR Operation DC-600 1TABLE of Contents Troubleshooting and Repair F-1 2TROUBLESHOOTING and REPAIRF-2 HOW to USE Troubleshooting GuideTroubleshooting and Repair PC Board Troubleshooting ProceduresControl Feeder. See Protective Devices Check all three phase input Output Control J1,Pin2. See Wiring Diagram Wiring Diagram Materials Needed PC Board Troubleshooting GuideTest Description PC Board Troubleshooting Guide Control Board Figure F.2 Control Board LEDsDC-600 Internal Trigger Circuit Test Procedure Internal Trigger Circuit TestInternal Trigger Circuit Test 75 76DC-600 Firing Board Test Firing Board Test Control Board Test Control Board Test Figure F.7 Control BoardMain Transformer Voltage Test Main Transformer Voltage Test Figure F.8 Input Contactor and Reconnect PanelFigure F.9 Transformer Secondaries Main Transformer Voltage Test Control Transformer Test Procedure Control Transformer TestInput Contactor Test Input Contactor Test Voltage TestSCR Bridge Test Anode Cathode Remove Insulating Paint SCR Bridge TestActive 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 Contactor Replacement Procedure Input Contactor CLEANING/REPLACEMENT ProcedureCleaning Procedure SCR Rectifier Bridge Removal and Replacement Procedure 42TROUBLESHOOTING and REPAIRF-42 Removal and Replacement ProcedureRemoval Procedure SCR Rectifier BridgeReplacement Procedure Insulator Lock Washer Plain Washer Output Snubber LeadDC-600 Main Transformer and Choke Removal and Replacement Removal and Replacement Main Transformer and ChokeRemoval Procedure Weld Input Idle Amps and Watts Maximum Open Circuit VoltagesDC-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