Manuals / Lincoln Electric / Power Tools / Welding System

Lincoln Electric SVM161-A service manual BUS Board Test, Figure F.11 BUS Board Location

Models: SVM161-A

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F-28	TROUBLESHOOTING AND REPAIR	F-28

BUS BOARD TEST (continued)

FIGURE F.11 – BUS BOARD LOCATION

BUS BOARD

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PROCEDURE

1.Remove input power to the V205-T machine.

2.Using a phillips head screwdriver, remove the case wraparound cover.

3.Perform the Capacitor Discharge Procedure detailed earlier in this section.

4.Locate the Bus board and associated plugs. Do not remove plugs from the board. See Figure F.11.

5.Carefully apply the correct input voltage to the V205-T and check for the correct voltages per

Tables F.5, F.6, F.7, F.8 & F.9

6.Machine should be set to “STICK” mode.

INVERTEC® V205-T AC/DC™

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Lincoln Electric SVM161-A service manual BUS Board Test, Figure F.11 BUS Board Location

Contents

Invertec V205-T AC/DC Safety Invertec V205-T AC/DC Electric Shock can kill ARC Rays can burn Can be dangerous Powered equipment Welding CuttingCylinder may explode Sparks can cause fire or If damaged Explosion Précautions DE Sûreté Sûreté Pour Soudage a L’Arc Safety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Operating Temperature Range Storage Temperature Range Select Suitable Location StackingTilting Environmental Area Reconnect Procedure Input Connections Attachment Plug Installation 230V Input115V Input Engine Driven Generator Work Cable Connection Output ConnectionsOutput and GAS Connection for TIG Welding Figure A.1 Remote Control Connection Shielding GAS Connection Invertec V205-T AC/DC Table of Contents Operation Section Safety Instructions OperationGeneral Description Welding Capability OPERATIONB-3 Rear Control Panel Figure B.1 Controls and Settings Figure B.2 Step Diagram Local/Remote push button Selects the welding TIG DC TIG AC SET UP Menu Indicator Parameter Default Output Limitations Welding Polarity Figure B.7 Steel TIG Welding Copper TIG WeldingTips for AC TIG Welding Filler Material AC TIG Welding Quick Start UP Protective GAS DC TIG Welding Quick Start UP Table of Contents Accessories Section Accessories Optional AccessoriesCompatible Equipment Cable Plugs Table of Contents Maintenance Section Maintenance Safety PrecautionsInput Filter Capacitor Discharge Procedure Routine Maintenance 3MAINTENANCE Figure D.1 Major Component Locations Invertec V205-T AC/DC 1TABLE of CONTENTS-THEORY of Operation Section E-1 Theory of Operation Input Board and BUS Board Main Igbt Inverter Board Figure E.3 Main Igbt Inverter Board Main Transformer Output Module Transistor BoardOutput Module and Clamping Board Superimposition Board Output Filter Board CONTROL/DISPLAY BoardHigh Frequency HF Board Insulated Gate Bipolar Transistor Igbt Operation Passive Active 1TABLE of Contents Troubleshooting and Repair F-1 Troubleshooting and Repair HOW to USE Troubleshooting Guide PC Board Troubleshooting Procedures Electric Shock can kill Igbt Perform the Input Filter Board Igbt Inverter Board Test Secondary Output Board Assembly Test See the Output Filter Troubleshooting and Repair External Diagnostics Display Troubleshooting and Repair Internal Diagnostics Figure F.2 Internal Diagnostics LED Invertec V205-T AC/DC Test Description Materials Needed Input Filter Capacitor Discharge Procedure Capacitor Solder Resistor Pads Input Filter Board Test Input Filter Board ProcedureInput Filter Board Test Input Filter Board Invertec V205-T AC/DC Main Igbt Inverter Board LOW Voltage Test Main Igbt Inverter Board LOW Voltage Test Figure F.6 Main Igbt Inverter Board Location Main Igbt Inverter Board LOW Voltage Test LED TP2 MF2 Figure F.7 Main Igbt Inverter Board Location CONTROL/DISPLAY Board Test CONTROL/DISPLAY Board Test Figure F.8 CONTROL/DISPLAY Board Location CN2 Figure F.9 CONTROL/DISPLAY Board Location CN1 Figure F.10 Plugs CN1, CN2 & CN7 BUS Board Test BUS Board Test Figure F.11 BUS Board Location Table F.5 Plug CN2 Test Points Table F.6 Plug CN3 Test PointsTable F.7 Plug CN4 Test Points Table F.8 Plug CN7 Test Points CN1 CN2 Main Inverter Board Power Factor Section Test Table F.11 Resistance Checks Main Inverter Board Power Factor Section TestTable F.10 Voltage Checks with 115 VAC Applied to Machine TP9 Gndpwr RL1 Invertec V205-T AC/DC Output Filter Board Test Output Filter Board Test Figure F.16 Output Filter Board Location Figure F.17 Output Filter Board Plug Location Figure F.18 Output Filter Board Plug CN1 Invertec V205-T AC/DC Secondary Output Board Assembly Test Secondary Output Board Assembly Test Figure F.19 Secondary Power Board Location OFF GA-SA Mode Positive Meter Negative Meter Expected Reading Probe Table F.14 Output Diode Resistance Check Main Inverter Board Welding Logic and Inverter Section Test Main Inverter Board Welding Logic and Inverter Section Test Table F.16 Feedback Voltage Signals Table F.18 LED Check in Stick ModeTable F.15 LED Function Table F.17 Voltage Checks with 115 VAC Applied to Machine Figure F.22 Main Board Inverter Section TP9 Ground Power Invertec V205-T AC/DC Input Filter Board Removal and Replacement Input Filter Board Removal and Replacement Figure F.24 Input Filter Board Location RV1 RV2 Invertec V205-T AC/DC Main Igbt Board Removal and Replacement Main Igbt Board Removal and Replacement Figure F.27 Main Igbt Board Location RV1 RV2 CN4 RV3 RV4 CN5 RV5 RV7 RV6 Invertec V205-T AC/DC CONTROL/DISPLAY Board Removal and Replacement CONTROL/DISPLAY Board Removal and Replacement Figure F.29 CONTROL/DISPLAY Board Location CN2 Invertec V205-T AC/DC Output Filter Board Removal and Replacement Removal and Replacement Figure F.32 Output Filter Board Location Phillips Head Screws CN1 Output Diodes Removal and Replacement Output Diodes Removal and Replacement To Replace ANY of the Output Diodes D1, D2, D3 or D4 Output Transistor Removal and Replacement Output Transistor Removal and Replacement Figure F.36 Output Transistor Location Plug CN1 5mm Allen Bolts Invertec V205-T AC/DC Table of Contents Diagram Section ELECTriCaL DiaGramS