Lincoln Electric SVM179-B service manual Table of Contents Diagram Section

Page 79

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G-1

TABLE OF CONTENTS - DIAGRAM SECTION

G-1

 

 

 

 

Electrical Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-1

Wiring Diagram - Code 11387, 11388 (G5681) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-2 Wiring Diagram - Code 11507, 11508 (G5681-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-3 Wiring Diagram - Code 11620, 11621,11716,11717 (G5681-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-4 Wiring Diagram - Code 11746, 11747 (G5681-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-5 Schematic - Complete Machine - Code 11387, 11388 (G5683) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-6 /G-7 Schematic - Complete Machine - Code 11507, 11508 (G5683-1) . . . . . . . . . . . . . . . . . . . . . . . . . . .G-8 / G-9 Schematic - Complete Machine - Code 11620, 11621,11716, 11717 (G5683-2) . . . . . . . . . . . . . .G-10 / G-11 Schematic - Complete Machine - Code 11746, 11747 (G5683-3) . . . . . . . . . . . . . . . . . . . . . . . . .G-12 / G-13 Schematic - Control PC Board* - Code 11387/8, 11507/8 (G4745-1) . . . . . . . . . . . . . . . . . . . . . .G-14 / G-18 Schematic - Control PC Board* - Code 11620/1, 11716/7, 11746/7 (G4783-1) . . . . . . . . . . . . . . .G-19 / G-23

Schematic - Motor Filter PC Board* - Code 11746, 11747 (S27505-1) . . . . . . . . . . . . . . . . . . . . . . . . . . .G-24 Schematic - K2330-2 Timer Kit PC Board* - All Codes (M21341-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-25

*NOTE: Many PC Board Assemblies are now totally encapsulated, surface mounted and or multi-layered and are therefore considered to be unserviceable. Assembly drawings of these boards are no longer provided.

LN-25™ PRO

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Contents LN-25PRO Wire Feeder LN-25 PRO SafetyElectric Shock can kill ARC Rays can burn For Electrically Welding CuttingIii Sûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation ELECTRIC SHOCK can Kill Safety PrecautionsHigh Frequency Protection LocationChanging the GUN Receiver Bushing Wire Drive ConfigurationCable Connections Shielding GAS ConnectionWire Guides Procedure to Install Drive RollsLoading Spools of Wire Pressure ARM AdjustmentGUN Connection Across the ARC SET-UPS Power Source to LN-25 PRO Cable Connection DiagramsDescription Figure A.7 Table of Contents Operation Section Operation Safety PrecautionsGeneral Description Description Wire Feed Speed KnobAnalog Voltmeter Figure B.2 Wire Feed Speed, CC Operation See Figure B.2 orTable B.2 VV CC Wire Speed Setting Figure B-3 Constant Current VS Constant Voltage Wire WeldingThermal LED, Motor Overload See Figure B.1 PIN GUN Trigger Connector See Figure B.1Wire Feed Speed Range Switch K2613-5 and K2613-7 only Work Sense LeadFigure B.4 Internal ControlsCold Feed Pushbutton Step Trigger Interlock SwitchCV/CC Switch Internal Controls DescriptionPreflow Timer Optional PREFLOW, Burnback Postflow Timer KIT K2330-2Figure B.5 Rear ControlsScfh POWER-UP SequenceGAS Purge Pushbutton Flow MeterLN-25 PRO Table of Contents Accessories Section Drive Roll Kits AccessoriesFactory Installed Equipment Wire TypeAccessories Accessories K435 Spindle Adapter, for mounting Installation of the K590-6 Water Cooling KIT Table of Contents Maintenance Section Calibration Specification MaintenanceRoutine Maintenance Periodic MaintenanceCover Wire Feed SpeedBoard Figure D.3. Major Component Location Control Board 1TABLE of CONTENTS-THEORY of Operation Section E-1Figure E.2 General Description Theory of OperationTRIGGER CIRCUIT Input PowerFigure E.4 Feedback & Control Circuits Feedback and Control CIR- CuitsFigure E.5 Optional Circuits & Digital Display Board Optional CircuitsLN-25 PRO Table of Contents Troubleshooting & Repair HOW to USE Troubleshooting Guide Troubleshooting & RepairPC Board Troubleshooting Procedures Fault Code Description Possible Adjustment Motor Solenoid Test Possible Areas Misadjustments Problems SymptomsRecommended Course of Action LN-25 PRO Test Description Case Removal ProcedureMaterials Needed Figure F.1 Case Removal ProcedureGAS Solenoid Test GAS Solenoid Control BOX Control BOX Cover Contactor Test Control BOX Contactor Drive Motor and Tach Feedback Test Case Control BOX Assembly Motor Overload Test Figure F.5 Control BOX Assembly Contactor Removal and Replacement Procedure Figure F.6 Control BOX Removal ProcedureFigure F.7 Buss BAR and Mounting Block Replacement ProcedureLN-25 PRO Front Panel Removal and Replacement Procedure Front Panel Troubleshooting & Repair Gas Hose Control BOX Wire Drive Panel Drive Gear Cover LN-25 PRO PC Board Removal and Replacement Procedure Figure F.11 Control PC Board Location PC BOARD Removal and Replacement ProcedureGAS Solenoid Removal and Replacement Procedure GAS Solenoid GAS Hose Control BOX Lock NUT Operation Verification SET UPRetest After Repair Retest a machineLN-25 PRO Table of Contents Diagram Section Wiring Diagram LN-25 PRO WiriNG DiaGram lN-25 prO CODEs 11507, 11508 G5681-1 Wiring DIAGRAM- LN-25 PRO Analog WiriNG DiaGram lN-25 prO CODEs 11746, 11747 G5681-3 G5683 LN-25 PRO Wire FeederLN-25 PRO Wire Feeder ElECTriCal DiaGrams G5683-1 Pushbutton LN-25 PRO Analog G5683-2G5683 G5683-3 Circuitryconfidential Equipmenttype Xres RXD Work 624 4783-1C0 Flexiblepowerfeede R 50V OF05 Circuitryconfidential S27505-1B0 R2 CW