Lincoln Electric SVM 113-A service manual M17578 Idler PC Board, M17578-1

Page 104

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G-6

G-6

DIAGRAMS

M17578 IDLER PC BOARD

 

 

M17578-1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J1

 

 

 

 

 

 

J2

 

 

 

 

 

WP125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R17

 

 

 

 

 

 

C8

 

 

 

 

 

 

 

 

 

R26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R27

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IDLER

D4

D9

 

CR1

 

 

TP1

 

 

R13

 

 

 

 

C11

 

D2

D1

D3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D11

 

 

 

 

 

 

 

DZ3

 

 

Q3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C14

 

 

 

 

 

 

 

 

 

 

R18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D13

 

D10

 

 

 

 

 

C6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R8

 

D5

 

 

 

 

 

 

 

 

 

 

 

 

 

C5

 

R9

 

 

 

 

 

 

 

R20

 

 

 

 

 

 

 

C9

 

 

 

 

R7

R6

R10

R12

D6

R1

 

DZ1

 

 

 

 

 

 

 

 

 

 

 

 

 

Q2

 

Q1

DZ2

R30

R5

D12

 

 

 

 

X1

 

 

 

C1

 

 

 

 

 

 

 

C3

 

 

R29

C7

R4

R23

R3

R2

 

 

 

C2

 

 

 

 

 

 

 

 

 

 

Q4

 

 

C13 R24

 

 

 

R11

 

 

 

R28

DZ4

 

C12

R25

R22

 

 

NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is provided for reference only. Lincoln Electric discour- ages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in dam- age to the machine.

WELDANPOWER 125

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Contents Weldanpowertm 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 WeldanpowerStoring Safety PrecautionsLocation and Ventilation PRE-OPERATION Engine Service Electrical Output Connections Welding Cable ConnectionsPlugs and HAND-HELD Equipment Auxiliary Power ReceptaclesMachine Grounding Premises Wiring Circuit BreakersThese Devices Without Table of Contents Operation Section Safety Instructions OperationOperating Instructions General DescriptionOperational Features and Controls Design Features AdvantagesRecommended Applications Welding CapabilityControls and Settings WELDER/GENERATOR ControlsGasoline Engine Controls Figure B.2 Gasoline Engine ControlsStarting the Engine Engine OperationBefore Starting the Engine Stopping the Engine For Best Engine StartingWelding Operation BREAK-IN PeriodGeneral Information LOW OIL SensingTo USE the Weldanpower 125 for WELD- ING TIG WeldingTable B.2 Electrode Selection Guide Auxiliary Power To USE the Weldanpower 125 AS AN Auxiliary Power SupplyTable B.3 Generator Power Applications Table of Contents Accessories Briggs and Stratton Accessories OPTIONS/ACCESSORIESLincoln Electric Accessories Table of Contents Maintenance Routine and Periodic Maintenance Engine MaintenanceFigure D.3 Clean Finger Guard MaintanenceFigure D.5 SET Spark Plug GAP WELDER/GENERATOR Maintenance Table D.2 Engine Maintenance PartsFigure D.6 Major Component Locations Table of Contents Theory of Operation Section ENGINE, EXCITATION, Rotor and Stator Idler BoardRotor Field Feedback Auxiliary Power Engine Idle Control Auxiliary Power Overcurrent ProtectionWeld WINDING, Output Rectifier and Choke Figure E.4 Weld WINDING, Output Rectifier and ChokeTable of Contents Trouble Shooting & Repair Section Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Electric Shock can killTroubleshooting Guide Output ProblemsOutput Rectifier Troubleshooting & Repair Perform the Engine Throttle Engine Problems Main Stator Winding Test Engine Throttle Adjustment Troubleshooting & Repair Weldanpower Materials Needed Rotor Voltage TestTest Description Test Procedure Rotor Voltage TestRotor Resistance Test Rotor Resistance Test Figure F.3 Brushes Retained with Cable TIE Output Rectifier Bridge Test Output Rectifier Bridge Test Main Stator Test Main Stator Test Figure F.6 Main Stator Molex Plug Test Points Rotor Flashing Circuit Test Rotor Flashing Circuit Test WP125 Idler Engine Throttle Adjustment Test Test Procedure Figure F.12 Idle Speed Adjustment Screw Locations Figure F.13 LOW Idle Adjustment NUT on Idler Solenoid TOC High Idle no Load Output Control AT Maximum Scope SettingsNormal Open Circuit Weld Voltage Waveform Normal Open Circuit Voltage Waveform 115 VAC Supply Machine Loaded to 125 Amps AT 25 VAC Typical Weld Output WaveformMachine Loaded Abnormal Open Circuit Weld Voltage Waveform Brush Removal and Replacement DescriptionProcedure Figure F.14 Brushes Retained with Cable TIEProcedure Rheostat Removal and Replacement Rheostat Removal and Replacement Field Capacitor Removal and Replacement Field Capacitor Removal and Replacement Field Diode Bridge Removal and Replacement Field Diode Bridge Removal and Replacement Figure F.18 Field Diode Bridge Location Idler Printed Circuit Board Removal Replacement Carefully remove the board Output Rectifier Bridge Removal Replacement Output Rectifier Bridge Removal and Replacement Troubleshooting & Repair Output Choke Removal and Replacement Output Choke Removal and Replacement Section TOC STATOR/ROTOR Removal and Replacement InstructionsStator Removal Procedure Troubleshooting & Repair Rotor Removal Procedure Reassembly ProcedureFigure F.24 Checking ROTOR-STATOR AIR GAP Feeler Gauge Troubleshooting & Repair Auxiliary Power Receptacle OUTPUT1 Retest After RepairEngine Output WELDER/GENERATOR OUTPUT1Weldanpower Table of Contents Diagrams Section Wiring Diagram Code 10158 Idler PC Board M17578 DiagramsSchematic Dimension Print Weldanpower Weldanpower M17578 Idler PC Board M17578-1M17578 Idler PC Board Bill of Materials DescriptionWeldanpower