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Lincoln Electric SVM161-A service manual Main Igbt Inverter Board LOW Voltage Test, Led

Models: SVM161-A

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F-21

TROUBLESHOOTING AND REPAIR

F-21

MAIN IGBT INVERTER BOARD LOW VOLTAGE TEST (continued)

Table F.1 Test Points

Machine Mode

Test Point

LED

Value

ON

TP13-TP14

L2

+15 VDC

ON

TP11-TP14

L3

+5 VDC

ON

TP12-TP14

L1

+15 VDC

ON

TP3-TP5

L4

+24 VDC

ON

TP4-TP5

L5

+48 VDC

ON

TP17-TP18

L6

+15 VDC

ON

TP21-TP18

L7

+15 VDC

ON

TP2[+],TP18[-]

---

+14.5 VDC

INVERTEC® V205-T AC/DC™

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Lincoln Electric SVM161-A service manual Main Igbt Inverter Board LOW Voltage Test, Led

Contents

Invertec V205-T AC/DC Invertec V205-T AC/DC SafetyCan be dangerous Electric Shock can kill ARC Rays can burnWelding Cutting Powered equipmentCylinder may explode Sparks can cause fire or If damaged ExplosionSûreté Pour Soudage a L’Arc Précautions DE SûretéSafety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Operating Temperature Range Storage Temperature Range InstallationStacking Select Suitable LocationTilting Environmental AreaInput Connections Reconnect Procedure230V Input Attachment Plug Installation115V Input Engine Driven GeneratorOutput and GAS Connection for TIG Welding Figure A.1 Output ConnectionsWork Cable Connection Shielding GAS Connection Remote Control ConnectionInvertec V205-T AC/DC Table of Contents Operation Section Operation Safety InstructionsGeneral Description Welding CapabilityRear Control Panel Figure B.1 OPERATIONB-3Figure B.2 Controls and SettingsLocal/Remote push button Selects the welding Step DiagramTIG DC TIG AC Indicator Parameter Default SET UP MenuWelding Polarity Output LimitationsFigure B.7 Copper TIG Welding Steel TIG WeldingTips for AC TIG Welding Filler MaterialProtective GAS AC TIG Welding Quick Start UPDC TIG Welding Quick Start UP Table of Contents Accessories Section Optional Accessories AccessoriesCompatible Equipment Cable PlugsTable of Contents Maintenance Section Safety Precautions MaintenanceInput Filter Capacitor Discharge Procedure Routine MaintenanceFigure D.1 Major Component Locations 3MAINTENANCEInvertec V205-T AC/DC 1TABLE of CONTENTS-THEORY of Operation Section E-1 Input Board and BUS Board Theory of OperationFigure E.3 Main Igbt Inverter Board Main Igbt Inverter BoardOutput Module Transistor Board Main TransformerOutput Module and Clamping Board Superimposition BoardHigh Frequency HF Board CONTROL/DISPLAY BoardOutput Filter Board Passive Active Insulated Gate Bipolar Transistor Igbt Operation1TABLE of Contents Troubleshooting and Repair F-1 HOW to USE Troubleshooting Guide Troubleshooting and RepairElectric Shock can kill PC Board Troubleshooting ProceduresIgbt Perform the Input Filter Board Igbt Inverter Board Test Secondary Output Board Assembly Test See the Output Filter Display Troubleshooting and Repair External DiagnosticsFigure F.2 Troubleshooting and Repair Internal DiagnosticsLED Internal DiagnosticsInvertec V205-T AC/DC Materials Needed Test DescriptionCapacitor Solder Resistor Pads Input Filter Capacitor Discharge ProcedureInput Filter Board Test Input Filter Board Test ProcedureInput Filter Board Input Filter Board Invertec V205-T AC/DC Test Description Main Igbt Inverter Board LOW Voltage TestFigure F.6 Main Igbt Inverter Board Location Main Igbt Inverter Board LOW Voltage TestLED Main Igbt Inverter Board LOW Voltage TestFigure F.7 Main Igbt Inverter Board Location TP2 MF2Test Description CONTROL/DISPLAY Board TestFigure F.8 CONTROL/DISPLAY Board Location CONTROL/DISPLAY Board TestFigure F.9 CONTROL/DISPLAY Board Location CN2Figure F.10 Plugs CN1, CN2 & CN7 CN1Test Description BUS Board TestFigure F.11 BUS Board Location BUS Board TestTable F.6 Plug CN3 Test Points Table F.5 Plug CN2 Test PointsTable F.7 Plug CN4 Test Points Table F.8 Plug CN7 Test PointsCN1 CN2 Test Description Main Inverter Board Power Factor Section TestTable F.10 Voltage Checks with 115 VAC Applied to Machine Main Inverter Board Power Factor Section TestTable F.11 Resistance Checks TP9 Gndpwr RL1 Invertec V205-T AC/DC Test Description Output Filter Board TestFigure F.16 Output Filter Board Location Output Filter Board TestFigure F.18 Output Filter Board Plug CN1 Figure F.17 Output Filter Board Plug LocationInvertec V205-T AC/DC Test Description Secondary Output Board Assembly TestFigure F.19 Secondary Power Board Location Secondary Output Board Assembly TestOFF GA-SA Table F.14 Output Diode Resistance Check Mode Positive Meter Negative Meter Expected Reading ProbeTest Description Main Inverter Board Welding Logic and Inverter Section TestWelding Logic and Inverter Section Test Main Inverter BoardTable F.18 LED Check in Stick Mode Table F.16 Feedback Voltage SignalsTable F.15 LED Function Table F.17 Voltage Checks with 115 VAC Applied to MachineFigure F.22 Main Board Inverter Section TP9 Ground Power Invertec V205-T AC/DC Test Description Input Filter Board Removal and ReplacementFigure F.24 Input Filter Board Location Input Filter Board Removal and ReplacementRV1 RV2 Invertec V205-T AC/DC Test Description Main Igbt Board Removal and ReplacementFigure F.27 Main Igbt Board Location Main Igbt Board Removal and ReplacementRV1 RV2 CN4 RV3 RV4 CN5 RV5 RV7 RV6 Invertec V205-T AC/DC Test Description CONTROL/DISPLAY Board Removal and ReplacementFigure F.29 CONTROL/DISPLAY Board Location CONTROL/DISPLAY Board Removal and ReplacementCN2 Invertec V205-T AC/DC Test Description Output Filter Board Removal and ReplacementFigure F.32 Output Filter Board Location Removal and ReplacementPhillips Head Screws CN1 Test Description Output Diodes Removal and ReplacementTo Replace ANY of the Output Diodes D1, D2, D3 or D4 Output Diodes Removal and ReplacementOutput Transistor Removal and Replacement Figure F.36 Output Transistor Location Output Transistor Removal and ReplacementPlug CN1 5mm Allen Bolts Invertec V205-T AC/DC Table of Contents Diagram Section ELECTriCaL DiaGramS