Lincoln Electric SVM146-A service manual Test Point

Page 78

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F-38

F-38

TROUBLESHOOTING & REPAIR

LOW VOLTAGE CIRCUIT TEST (continued)

FIGURE F.13 – OUTBOARD LOW VOLTAGE CIRCUIT TEST POINTS AND LEDs

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X4

(B12)

(B21)

X2

(B11)

TEST POINT

D29

 

 

 

 

 

G3439 PRO-CUT 80 OUTPUT

 

 

 

 

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TEST POINT

 

C13

 

 

 

 

 

 

 

D25

LED3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LED5

 

 

 

 

 

 

 

 

LED1

 

 

 

 

 

LED4

 

 

 

 

 

LED2

J33

X20

X40

J31

 

J34

J32

J30

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PRO-CUT 80 OUTPUT BOARD LED DEFINITIONS

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LED1: (Red) This light indicates that 24 VAC is being supplied to the output board from the aux- iliary transformer. It also shows that the 24 VAC is being rectified to approximately 28 VDC. This DC voltage is used for the "parts-in-place" check for the torch circuit.

LED2: (Red) This light indicates that 12 VAC is being supplied to the output board from the aux- iliary transformer. It also shows that the 12 VAC is being rectified to approximately 17 VDC. This DC voltage is used to power the trigger circuit and solenoid driver circuits incorporated on the output board.

LED3: (Green) This light indicates that the air solenoid driver circuit is functioning. When this LED is lit, the air solenoid should be activated.

LED4: (Green) This light indicates that the trig- ger circuit on the output board has been acti- vated. This LED should be lit when the torch or remote trigger is closed. This trigger circuit, on the output board, then sends a signal to the control board.

LED5: (Green) This light indicates that the elec- trode solenoid driver circuit is functioning. When this light is lit, the electrode solenoid should be activated. The electrode solenoid should be energized during gas (air) pre-flow time. During pilot and cutting arc periods, the LED should be off. When the arc goes out, the machine enters the post-flow state. Two seconds after the start of post-flow the electrode solenoid is activated a few times. The LED should blink to indicate this activity. The electrode solenoid will then be energized for the duration of post-flow. (The LED should be on).

PRO-CUT 80

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Contents PRO-CUT Safety California Proposition 65 WarningsElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications PRO-CUTTechnical Specifications Cont’d PRO-CUT GAS RequirementsLifting and Moving Safety PrecautionsSelect Suitable Location StackingInput Connections Input Power Cord Connector InstallationInput Wire and Fuse Size Ground ConnectionReconnect Procedure Reconnect ProcedureGAS Input Connections Return Return to Section TOCOutput Connections Torch ConnectionTable of Contents Operation Section Safety Instructions OPERATIONB-2Operating Instructions Operation Operational Features and ControlsDesign Features Advantages General DescriptionCutting Capability Consumable LifeLimitations Controls and Settings Cutting OperationPilot ARC Considerations Safety Status Indicator Plasma Cutting Preheat Temperature forProcedure Recommendations User ResponsibilityThick Sections of Metal Suggestions for Extra Utility from the PRO-CUT SystemARC Start ARC InitiatedARC Voltage PRO-CUT Table of Contents AccessoriesGeneral Options Accessories Table of Contents Maintenance Input Filter Capacitor Discharge Procedure Electric Shock can killRoutine Maintenance Periodic MaintenanceMaintenance Table of Contents Theory of Operation Section Input Line VOLTAGE, Switch and Main Transformer Theory of OperationPower Board Precharge and ProtectionMain Transformer Figure E.4 Main TransformerOutput Board and Torch Figure E.5 Plasma Output Board and TorchControl and Display Boards Figure E.6 Control and Display BoardsProtection Circuits Overload ProtectionThermal Protection Insulated Gate Bipolar Transistor Igbt Operation Pulse Width Modulation Minimum OutputMaximum Output PRO-CUT Table of Contents Troubleshooting & Repair Section Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures PC Board can be damaged by static electricityTroubleshooting Guide Output ProblemsFunction Problems Air begins to flow when Make sure the air pressure is Cutting Problems LED Function Problems Troubleshooting Guide Description Materials NeededInput Filter Capacitor Discharge Procedure Figure F.1 Location of Input Filter Capacitor TerminalsInput Rectifier Test Test Procedure Input Rectifier TestTest Point Terminals Analog Meter X10 Range Primary Power Board Resistance Test Capacitor Voltage Test Primary Power Board Resistance Test Capacitor Voltage TestBoard Removal and Replacement Procedure Test Procedure Table F.3 Capacitor Voltages Output Power Board Resistance Test Output Power Board Resistance Test Figure F.4 Output Power Board Lead LocationsOutput Power Board Removal and Replacement Procedure Torch Continuity and Solenoid Test Test Procedure Torch Continuity and Solenoid TestAIR/GAS Solenoid Test AIR/GAS Solenoid Test Figure F.6 AIR SolenoidT2 Auxiliary Transformer Test Procedure T2 Auxiliary Transformer TestTest Point Expected Voltage Yellow 1J21 Yellow 7J21 115VACTrigger Circuit Test Trigger Circuit Test Simplified Trigger CircuitPerform the Input Filter Capacitor Discharge Procedure PRO-CUT 80 Output Board LED Definitions Control Board LED Definitions Figure F.11 Control Board LEDsLOW Voltage Circuit Test LOW Voltage Circuit Test T2 Auxiliary TransformerFigure F.12, Low Voltage Circuit Diagram Test Point Figure F.15 Display Board Test Points Control Board Removal and Replacement Control Board Removal and Replacement ScrewsFigure F.18 Control Board Removal from Mounting Pins Display Board Removal and Replacement Display Board Removal & Replacement Figure F.19 Case Front Screw RemovalFigure F.20 Display Board Removal Output Power Board Removal and Replacement Output Power Board Removal & Replacement Output Power BoardFigure F.22 Output Board Lead Locations Replacement Procedure This procedure takes approximately 40 minutes to perform Primary Power Board and Filter Capacitor Removal and ReplacementRemoval Procedure Heatsink Mounting Screws Socket Head Capacitor Replacement and P.C. Board Replacement Capacitor RemovalInput Rectifier Bridge Removal and Replacement Input Rectifier Bridge Removal and Replacement Figure F.25 Input Rectifier Lead Locations PRO-CUTTroubleshooting & Repair Retest After Repair Input Idle Amps and WattsPRO-CUT Electrical Diagrams 2ELECTRICAL Diagrams G-2 Wiring Diagram PRO CUTSchematic Control PC Board Cutting Current Setpoint LocalPC Board Assembly Control Board Code 10574 only PRO-CUT 80 ControlPC Board Assembly Control Board Code 10577 & 10578 only G3560-16ELECTRICAL DIAGRAMSG-6 Schematic Power PC BoardPC Board Assembly Power Board PowerElectrical PC Board Assembly Output Board Reqd IdentificationSchematic Display PC Board FilenamePC Board Assembly Display Board Light BAR,LED,GREENSVM Error Reporting Form

SVM146-A specifications

Lincoln Electric's SVM146-A is a versatile and powerful multi-process welding machine designed for professionals in various industries. Known for its robustness and reliability, this machine excels in both performance and user-friendly features, making it a popular choice among welders.

One of the standout features of the SVM146-A is its multi-process capability, allowing users to perform MIG, TIG, and stick welding using a single unit. This versatility is enhanced by Lincoln Electric's innovative Auto-Set technology, which automatically adjusts the machine's settings based on the selected process and materials being welded. This feature significantly reduces the time spent on setup and helps ensure optimal weld quality, even for less experienced operators.

The SVM146-A is powered by a reliable inverter design, which provides greater efficiency compared to traditional transformer-based machines. This compact and lightweight design allows for easy transport, making it ideal for job sites or remote locations. The inverter technology also contributes to enhanced arc stability and better overall performance, providing high-quality welds in less time.

Another key characteristic of this welding machine is its robust construction, designed to withstand the rigors of heavy industrial use. The SVM146-A features a durable chassis and control panel, ensuring longevity and reliability under challenging working conditions. Additionally, its intuitive interface allows users to easily navigate settings and make adjustments as needed.

Safety is a paramount concern in welding applications, and the SVM146-A is equipped with several safety features, including over-temperature and over-voltage protection, ensuring that the machine operates safely even in demanding environments. It also features a start inhibit system, preventing the machine from being started under unsafe conditions.

The SVM146-A is compatible with a variety of welding accessories and consumables, enhancing its flexibility and usability across different applications. Whether it’s automotive repair, heavy fabrication, or maintenance work, this welding machine adapts to various tasks, making it a valuable addition to any professional's toolkit.

In conclusion, Lincoln Electric's SVM146-A stands out as a multi-process welding machine that combines advanced technology, robust design, and user-friendly features. It is engineered for performance and reliability, making it an excellent investment for professionals dedicated to achieving high-quality welds.
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