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

Page 101

G-3

3-GDIAGRAMS	SCHEMATIC
	IDLER PC BOARD (M17578)
	TOC
	TOC

1N5406

J1

10

16

D1

D3

Q2

D13

1A

R8

1N5406

INPUT

300V

5.11K

C6

1N5406

+8V

D2

D4

68

COM

R9

63V

1N5406

t +

J1

9

9B

5.11K

C14

J1

202A

68

.25

2

63V

R15

DZ1 COM

D5

TO

D9

R5

10K

8.2V

RHEOSTAT

47.5K

1W

D11

1

1N5406

FLASHING

CR1

J1

14

R7

7

12Vdc

4

3

R2

R3

10K

COM

Q1

D

208

2

J1

221K

R6

18A

3

200V

5 CR1

5 CR1

33K1

R30

G

TO

S

SOLENOID

C3

C2

4.75K

D10

J1

209

0.1

200

6

9

DZ2

4

12/16V

50V

1

14

15V

+8V

X1

X1

J1

1W

8

7

8

3

R12

NOT USED

J2

26.7K

2

R20

10K

TO

J2

X1

R1

C7

C9

R28

1

681

47.5K

RHEOSTAT

10

D6

J1

200A

LM2901

Q4

5

1N4936

12

39

R4

31.6K

11

X1

13

R10

18

R11

5W

1A

J1

203

100V

C1

C5

6

10V

3.01K

15V

.5

TP1

3300

C8

DZ4

SNUBBER

R13

130V

5W

.05

15V

38J

1N4936

600V

1W

204

+8V

D12

J1

1

COM

COM

J2

Q3

R18

R16

3

4

R22

2N4401

2

162

150

51.1K

X1

C11

R17

CURRENT

R23

5

DZ3

R14

.47

C13

C12

1.50K

50V

10V

150

SENSE

10K

5W

R26

0.1

18

R25

22.1K

R29

10K

R24

50V

15V

150

J2

4

43.2K

R27

COM

GENERAL INFORMATION

150

NOTES :

COM

LAST NO. USED

ELECTRICAL SYMBOLS PER E1537

R-

30

N.A.

SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE

CAPACITORS =

MFD ( .022/50V

UNLESS OTHERWISE SPECIFIED)

LABELS

C-

14

WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY

RESISTORS = Ohms (

1/4W UNLESS OTHERWISE SPECIFIED)

D-

13

NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE

DIODES =

1A, 400V

(UNLESS OTHERWISE SPECIFIED)

SUPPLY

VOLTAGE NET

NUMBER.

10

6

4

3

POWER SUPPLY SOURCE POINT

J2

MOLEX

COMMON CONNECTION

2

1

FRAME CONNECTION

FILE:

M17630_1BB

5

J1

1

EARTH GROUND CONNECTION

WELDANPOWER 125

SCHEMATIC - IDLER P.C. BOARD

2-17-95

M 17630

Master to Return

TOC Master to Return

TOC Master to Return

Section to Return

TOC Section to Return

TOC Section to Return

TOC

TOC

PC	for	dia-
		This
board	Board Schematic is	PC board version.
resulting	Printed		PC	WELDANPOWER125
for liabilities	factory warranty. This	applicable to your	information
Lincoln Electric assumes no	Board repairs will invalidate	reference only. It may not be	gram is intended to provide
NOTE:
Master to Return
Section to Return
evelresponsibilityfromltroubleshooting.	ourircuitrovidedyCp	otallypecifictmachine’ss	oardgeneralregardingbfunction.

Image 101

Contents Weldanpowertm California Proposition 65 Warnings SafetyElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Master Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications Weldanpower InstallationStoring Safety PrecautionsLocation and Ventilation PRE-OPERATION Engine Service Welding Cable Connections Electrical Output ConnectionsPlugs and HAND-HELD Equipment Auxiliary Power ReceptaclesMachine Grounding Circuit Breakers Premises WiringThese Devices Without Table of Contents Operation Section Operation Safety InstructionsOperating Instructions General DescriptionDesign Features Advantages Operational Features and ControlsRecommended Applications Welding CapabilityWELDER/GENERATOR Controls Controls and SettingsFigure B.2 Gasoline Engine Controls Gasoline Engine ControlsStarting the Engine Engine OperationBefore Starting the Engine For Best Engine Starting Stopping the EngineBREAK-IN Period Welding OperationGeneral Information LOW OIL SensingTIG Welding To USE the Weldanpower 125 for WELD- INGTable B.2 Electrode Selection Guide To USE the Weldanpower 125 AS AN Auxiliary Power Supply Auxiliary PowerTable B.3 Generator Power Applications Table of Contents Accessories Briggs and Stratton Accessories OPTIONS/ACCESSORIESLincoln Electric Accessories Table of Contents Maintenance Engine Maintenance Routine and Periodic MaintenanceMaintanence Figure D.3 Clean Finger GuardFigure D.5 SET Spark Plug GAP Table D.2 Engine Maintenance Parts WELDER/GENERATOR MaintenanceFigure D.6 Major Component Locations Table of Contents Theory of Operation Section Idler Board ENGINE, EXCITATION, Rotor and StatorAuxiliary Power Overcurrent Protection Rotor Field Feedback Auxiliary Power Engine Idle ControlFigure E.4 Weld WINDING, Output Rectifier and Choke Weld WINDING, Output Rectifier and ChokeTable of Contents Trouble Shooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & RepairElectric Shock can kill PC Board Troubleshooting ProceduresOutput Problems Troubleshooting GuideOutput 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 Rotor Voltage Test Test ProcedureRotor 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 Description Brush Removal and ReplacementFigure F.14 Brushes Retained with Cable TIE ProcedureProcedure 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 Instructions STATOR/ROTOR Removal and ReplacementStator Removal Procedure Troubleshooting & Repair Reassembly Procedure Rotor Removal ProcedureFigure F.24 Checking ROTOR-STATOR AIR GAP Feeler Gauge Troubleshooting & Repair Retest After Repair Auxiliary Power Receptacle OUTPUT1Engine Output WELDER/GENERATOR OUTPUT1 Weldanpower Table of Contents Diagrams Section Wiring Diagram Code 10158 Idler PC Board M17578 DiagramsSchematic Dimension Print Weldanpower Weldanpower M17578-1 M17578 Idler PC BoardDescription M17578 Idler PC Board Bill of MaterialsWeldanpower