Schematic Digital Control PC Board #4 | Lincoln Electric SVM159-A

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G-7	ELECTRICAL DIAGRAMS	G-7
SCHEMATIC - DIGITAL CONTROL PC BOARD #4

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

POWERWAVE 355/405

Image 127

Lincoln Electric SVM159-A service manual Schematic Digital Control PC Board #4

Contents

Power Wave 355/405 Safety Electric Shock can kill Welding Sparks can cause fire or explosion Safety Sûreté Pour Soudage a L’Arc Précautions DE Sûreté Electromagnetic Compatibility EMC Installation Installation Master Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications Power Wave Installation Power Wave 405 Input Current Select Suitable Location Safety Precautions Negative Electrode Polarity Output CABLES, Connections and LimitationsVoltage Sensing Table A.1 Figure A.1 System Description Figure A.2 System SET-UP Figure A.3 Figure A.5 Control Cable Specifications Welding with Multiple Power WavesTWO Power Waves DIP Switch Settings and Locations Receptacle SpecificationsControl Board DIP Switch Table of Contents Operation Section Operation Safety Precuations General Description Case Front Controls Required EquipmentLimitations Duty Cycle and Time Period Making a Weld Welding AdjustmentsNominal Procedures Fringe Procedures Current Wave Form CV Constant Voltage Welding Special Welding Processes Available on this Machine Power ModeTIG Gtaw Figure B.3 Pulse Welding GMAW-P PULSE-ON-PULSE GMAW-PP Welding Procedures for PULSE-ON-PULSE Table of Contents Accessories Section Optional Equipment AccessoriesFactory Installed Field Installed Maintenance Table of Contents Visual Inspection Capacitor Discharge ProcedureRoutine Maintenance Periodic Maintenance 355 Power Wave 355/405 Table of Contents Theory of Operation Section General Description Theory of OperationInput Line VOLTAGE, Auxiliary TRANSFORMER, & Precharge 42VAC Switch Board Main Transformer Power Board DC BUS BOARD, Power Board and Control Board DC BUS BoardControl Board Figure E.5 Output Rectifier and Choke Output Rectifier and Choke UNDER/OVER Voltage Protection Thermal ProtectionProtective Circuits Over Current Protection Figure E.6 Igbt Insulated Gate Bipolar Transistor Igbt Operation Minimum Output Maximum Output Pulse Width Modulation 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 Transformer Test Perform the Power Board TestPerform the Main Switch Board Auxiliary Perform the Output Rectifier Power BoardSee Fault Code Explanations Board Test Perform the T1 Auxiliary trans Removal Procedure will beFan Motor And Control Board Current Current Calibration Procedure Light Condition Indication Using the Status LED to Troubleshoot System Problems Status LED Error Code Table Troubleshooting & Repair Power Wave 355/405 Description Input Filter Capacitor Discharge Procedure Discharge Procedure Input Filter Capacitor Discharge Procedure Main Switch Board Test Main Switch Board Test Main Switch Board Removal and Replacement Power Wave 355/405 Input Rectifier Test #207 #207A #209 + Probe Input Rectifier Bridge Removal & Replacement procedureProbe Power Wave 355/405 Power Board Test J42 J41 J43 Test Procedure Table F.3 Power Board Voltage Checks Check Point Power Wave 355/405 Test Description DC BUS Board TestMaterials Needed J47 Table F.4 DC BUS Power Supply PC Board Voltage Table Power Wave 355/405 Output Diode Modules Test Output Diode Modules Test Figure F.8 Terminal Probes Diagram Left Side Auxiliary Transformer Test Plug P52 Normal Expected Voltage Auxiliary Transformer NO.1 Test Power Wave 355/405 Current Transducer Test Troubleshooting and Repair Plug J8 Output Load Current Transducer Removal and Replacement Procedure Power Wave 355/405 FAN Control and Motor Test FAN Control and Motor Test Perform the Input Filter Capacitor Discharge Procedure Current Transducer Removal and Replacement Procedure FAN Control Test Procedure Power Wave 355/405 Control Board Removal and Replacement Control Board J10A Mounting Main Switch Board Removal and Replacement Troubleshooting Procedures at the beginning Main Switch Board Removal & Replacement Allen Bolts Power Wave 355/405 Snubber Board Removal and Replacement Perform the Input Filter Capacitor Discharge Snubber Board Removal and Replacement Power Board Removal and Replacement Left Side J42 J41 J43 Power Wave DC BUS Board Removal and Replacement DC BUS Board Removal and Replacement J47 Troubleshooting & Repair Input Rectifier Removal and Replacement Input Rectifier Removal and Replacement #207 #207A #209 Power Wave 355/405 Output Rectifier Modules Removal Replacement Output Rectifier Modules Removal and Replacement Mounting Bolts Allen Power Wave 355/405 Current Transducer Removal and Replacement Rear Nut Return to Section Section TOC Perform the Snubber Board Removal Procedure Perform the Snubber Board Replacement Procedure Input Idle Amps and Watts Retest After RepairMaximum Output Voltages Table of Contents Electrical Diagrams Section Electrical Diagrams Wiring Diagram Powerwave 355/405 G4131 Wiring Diagram Power Wave 355/405 To Section Schematic Complete Machine Schematic Digital Control PC Board #1 Schematic Digital Control PC Board #2 Schematic Digital Control PC Board #3 Schematic Digital Control PC Board #4 ‡‚ÁËÌ‰ü¬ÓÌÛÒÓÎüœÓˆ‰ÒüÙÔÔÎ¯ Schematic Power Supply Printed Circuit Board Schematic Switch PC Board Return to Section PC Board Assembly Switch PC Board 2000 S24761 Schematic Snubber PC Board Reqd Description PC Board Assembly Snubber PC Board Schematic 40 VDC Buss PC Board SVM Error Reporting Form