Lincoln Electric V205-T service manual CONTROL/DISPLAY Board Removal & Replacement

Page 94

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F-58

F-58

TROUBLESHOOTING & REPAIR

CONTROL/DISPLAY BOARD REMOVAL & REPLACEMENT (continued)

FIGURE F.29 – CONTROL/DISPLAY BOARD LOCATION

Control/Display Board

PROCEDURE

5. Carefully remove the board assembly.

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

 

 

 

 

 

2. Using a phillips head screwdriver remove the

NOTE: The board assembly is attached

to the

 

nameplate/keypad and is to be replaced as

 

four screws from the corners of the

name-

 

 

 

one unit.

 

 

plate/keypad on the front of the machine. See

 

 

 

 

 

 

 

Figure F.30.

 

 

6. Replace the board assembly.

 

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

 

 

7.

Connect previously removed ground lead.

 

 

 

 

8.

Connect previously removed leads CN1,

CN2,

Observe static precautions detailed in PC Board

 

CN3, & CN7.

 

Troubleshooting Procedures at the beginning of

9. Replace the four phillips head screws previous-

this section. Failure to do so can result in perma-

 

ly removed from the corners of the

name-

 

 

 

 

 

nent damage to equipment.

plate/keypad.

 

3.Tilt display plate forward and carefully label and disconnect leads CN1, CN2, CN3 & CN7.

See Figure F.31.

4.Disconnect the ground lead running from the P.C. board to the machine frame. See Figure

F.31.

V205-T AC/DC

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Contents Invertec V205-T AC/DC Safety Electric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Operating Temperature Range Storage Temperature RangeTilting Select Suitable LocationStacking Environmental AreaReconnect Procedure Input Connections115V Input Attachment Plug Installation230V Input Engine Driven GeneratorOutput and GAS Connection for TIG Welding Figure A.1 Output Connection for StickWork Cable Connection Remote Control Connection Shielding GAS ConnectionV205-T AC/DC Table of Contents Operation Section Welding Capability Safety InstructionsGeneral Description LimitationsRear Control Panel Figure B.1 Figure B.1Controls and Settings Figure B.2Step Diagram Local/Remote push button Selects the weldingTIG DC TIG AC SET UP Menu Indicator Parameter DefaultOutput Limitations Welding PolarityFigure B.5 Tips for AC TIG Welding Steel TIG WeldingCopper TIG Welding Filler MaterialAC TIG Welding Quick Start UP Protective GASDC TIG Welding Quick Start UP Table of Contents AccessoriesCable Plugs Optional AccessoriesCompatible Equipment TIG Torch KitsTable of Contents Maintenance Input Filter Capacitor Discharge Procedure Safety PrecautionsRoutine Maintenance Table of Contents Theory of Operation Section General Description Theory of OperationInput Board and BUS Board Main Igbt Inverter Board Figure E.3 Main Igbt Inverter BoardOutput Module and Clamping Board Main TransformerOutput Module Transistor Board Superimposition BoardCONTROL/DISPLAY Board High Frequency HF Board Output Filter BoardInsulated Gate Bipolar Transistor Igbt Operation Figure E.6 IgbtTable of Contents Troubleshooting & Repair Section Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Electric Shock can killOutput Problems Function Problems Function Problems Secondary Power Board Test Welding Problems Troubleshooting & Repair External Diagnostics Figure F.1 External DiagnosticsTroubleshooting & Repair Internal Diagnostics Figure F.2Internal Diagnostics LEDV205-T AC/DC Input Filter Capacitor Discharge Procedure DescriptionInput Filter Capacitor Discharge Procedure Discharge ProcedureInput Filter Board Test Input Filter Board Figure F.5 Input Filter Board V205-T AC/DC Main Igbt Inverter Board LOW Voltage Test Main Board LED Table F.1 Test PointsTP2 MF2 Figure F.7 Main Igbt Inverter Board LocationCONTROL/DISPLAY Board Test Control/Display Board CN2 CN7 CN1 Figure F.9 CONTROL/DISPLAY Board LocationTable F.3 Plug CN2 Test Points CN1Table F.2 Plug CN1 Test Points Table F.4 Plug CN7 Test PointsBUS Board Test BUS Board Table F.7 Plug CN4 Test Points Table F.5 Plug CN2 Test PointsTable F.6 Plug CN3 Test Points Table F.8 Plug CN7 Test PointsCN2 CN4Main Inverter Board Upfr Section Test Figure F.14 Upfr Location on Main Board Table F.10 Voltage Checks with 115 VAC Applied to MachineTP9 Gndpwr RL1 DD1 MF9V205-T AC/DC Troubleshooting and Repair Output Filter Board TestOutput Filter Board Figure F.17 Output Filter Board Plug Location Figure F.18 Output Filter Board Plug CN1V205-T AC/DC Secondary Power Board Test Secondary Power Board Figure F.20 Secondary Power Board Test Point Locations Table F.13 Voltage Checks with 115 VAC Applied to MachineV205-T AC/DC Main Inverter Board Welding Logic and Inverter Section Test Main Inverter Board Figure F.21 Main Board LocationTable F.14 LED Functions Table F.15 Feedback Voltage SignalsTable F.17 LED Check in Stick Mode Table F.16 Voltage Checks with 115 VAC Applied to MachineTP14 TP15 TP16 TP19 TP31 CN4/1-2 Short Circuit Ohms CN5/1-2 Figure F.23 Main Board Lower Left TP9 Ground Power MF15 VDS MF12 MF16 VDSV205-T AC/DC Input Filter Board Removal and Replacement Input Filter Board Removal and Replacement RV1 V205-T AC/DC Main Igbt Board Removal and Replacement Main Igbt Board Removal & Replacement CN2 CN1 V205-T AC/DC CONTROL/DISPLAY Board Removal and Replacement CONTROL/DISPLAY Board Removal & Replacement CN7 CN3V205-T AC/DC Output Filter Board Removal and Replacement Removal and Replacement Casefront Mounting Screws Phillips Head Screws CN1 CN2 Output Diodes Removal and Replacement Output Diodes Figure F.35 Output Diode LocationOutput Transistor Removal and Replacement Output Transistor Removal and Replacement Plug CN1 5mm V205-T AC/DC Electrical Diagrams Table of Contents Electrical Diagrams SectionWiring Diagram V205-T AC/DC Standard Diagram SVM Error Reporting Form
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