Lincoln Electric SVM146-A service manual LOW Voltage Circuit Test, T2 Auxiliary Transformer

Page 76

Section TOC

Master TOC

F-36

F-36

TROUBLESHOOTING & REPAIR

LOW VOLTAGE CIRCUIT TEST (continued)

FIGURE F.12 - LOW VOLTAGE CIRCUIT DIAGRAM

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T2 AUXILIARY

 

 

 

TRANSFORMER

 

TO H1

H1

 

 

"C" TERMINAL

 

BROWN

INPUT

 

 

 

RECTIFIER

 

12VAC BROWN

 

 

 

H2

 

 

 

 

 

RED

 

 

24VAC

RED

 

 

 

 

H3

 

 

TO

 

 

 

RECONNECT

 

 

 

LEAD "A"

 

 

 

 

H4

 

BLUE

 

 

 

 

 

18VAC

WHITE

 

 

 

 

H5

18VAC

BLUE

 

 

 

PROCEDURE

 

 

8

3

2

6

4

5

9

J21

#53

3J30

 

 

 

 

 

 

 

 

 

#56

 

17 VDC

 

 

 

 

 

 

 

6J30

 

 

 

PLASMA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT

 

 

 

 

 

#51

1J30

 

 

 

BOARD

 

 

 

 

 

#54

 

 

32 VDC

 

 

 

 

 

 

 

4J30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

#61

 

 

 

 

 

 

 

 

D

 

1J1

 

 

 

 

#216

 

 

 

 

 

 

6J2

 

15J40

I

B

 

=+15VDC

 

 

 

 

 

 

#62

 

 

 

 

 

 

+

 

S

O

2J1

 

CONTROL BOARD

 

+15VDC

 

#64

=-15VDC

 

9J2

#219

 

10J40

P

A

4J1

 

 

 

 

 

 

 

L

R

 

 

 

 

 

 

 

 

 

A

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

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1.Remove input power to the PRO-CUT 80 machine.

2.Using the 5/16" nutdriver remove the case wraparound cover.

WARNING

ELECTRIC SHOCK can kill.

• Do not touch electrically hot parts.

3.Apply the correct input power to the machine and carefully check for the following voltages.

4.Check for the presence of approximately 32 VDC on the output board.

a.LED1 should be lit when 32 VDC is present. See Figure F.13. See Output Board LED Definitions and Figure F.12, Low Voltage

Circuit Diagram.

b.To verify the presence of 32 VDC, check across capacitor C13. Make certain the voltmeter probes make good contact with the capacitor leads. See Figure F.13.

5.Check for the presence of 17 VDC on the out- put board.

a.LED2 should be lit when 17 VDC is present. See Figure F.13. See Output Board LED Definitions and Figure F.12, Low Voltage

Circuit Diagram.

b.To verify the presence of 17 VDC, check from plug J31 Pin-6 to diode D25 (anode). See Figure F.13. Make certain the volt- meter probes make good contact with pin- 6 and the diode anode lead. It will be nec- essary to penetrate the silicon sealant.

6.Check for the presence of +15 VDC on the control board.

a.LED1 should be lit when +15 VDC is pre- sent. See Figure F.13. See Control Board LED Definitions and Figure F.12,

Low Voltage Circuit Diagram.

7.Check for the presence of -15 VDC on the con- trol board.

a.LED3 should be lit when -15 VDC is pre- sent. See Figure F.13. See Control Board LED Definitions and Figure F.12, Low

Voltage Circuit Diagram.

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 RequirementsSafety Precautions Select Suitable LocationLifting and Moving StackingInput Power Cord Connector Installation Input Wire and Fuse SizeInput Connections Ground ConnectionReconnect Procedure Reconnect ProcedureGAS Input Connections Return Return to Section TOCOutput Connections Torch ConnectionTable of Contents Operation Section OPERATIONB-2 Safety InstructionsOperating Instructions Operational Features and Controls Design Features AdvantagesOperation General DescriptionConsumable Life Cutting CapabilityLimitations Cutting Operation Controls and SettingsPilot ARC Considerations Safety Status Indicator Preheat Temperature for Procedure RecommendationsPlasma Cutting User ResponsibilityThick Sections of Metal Suggestions for Extra Utility from the PRO-CUT SystemARC Initiated ARC StartARC 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 BoardsOverload Protection Protection CircuitsThermal Protection Insulated Gate Bipolar Transistor Igbt Operation Minimum Output Pulse Width ModulationMaximum 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 Removal and Replacement Primary Power Board and Filter CapacitorRemoval 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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