Lincoln Electric SVM188-A service manual Internal Trigger Circuit Test, 75 76

Page 55

Section TOC

Master TOC

F-15

TROUBLESHOOTING AND REPAIR

F-15

INTERNAL TRIGGER CIRCUIT TEST (continued)

FIGURE F.4 - TERMINAL STRIPS AND AMPHENOL

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TS 2

21+ 21- 41 4 2

31 32

10AMP CIRCUIT BREAKER

 

OUTPUT

 

 

TERMINALS

 

 

SWITCH

 

5

6

 

4

7

 

 

 

3

 

 

 

8

 

2

 

 

 

9

 

1

10

 

 

 

 

DC-600

 

 

 

K = 4 2

 

A = 3 2

J = 3 1

 

B = G N D

I = 4 1

TS 1

L

N

 

14 PIN

 

 

CONNECTOR C = 2

H = 2 1

75 76 77

D = 4

G = 7 5

 

 

E = 7 7

F = 7 6

 

 

 

 

M

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FIGURE F.5 - SIMPLIFIED TRIGGER DIAGRAM

 

 

 

 

10AMP

 

 

 

 

 

 

CIRCUIT

 

 

 

 

 

 

BREAKER

 

 

 

 

 

 

42

To 42A at Main

 

FIRING BOARD

 

 

 

 

Transformer

 

 

 

 

 

 

 

 

 

 

TERMINAL

 

 

 

 

 

 

STRIP TS 2

 

 

 

 

14-PIN

 

 

 

 

11J5

291

 

 

 

2

 

RECEPTACLE

 

 

 

 

 

 

 

 

4J5

 

TO

 

2

 

2

OUTPUT

 

CONTROL

C

2

 

BOARD

 

 

TERMINAL

LED10

 

 

 

K

42

 

 

SWITCH

10J5

290

 

 

4

 

 

4

 

4

 

 

D

4

 

LATCHING

 

 

 

9J5

 

I

 

41

 

 

RESISTOR

 

 

41

 

 

ENABLE

 

 

 

 

41

FIRING

 

 

 

 

 

1J5

 

 

 

 

 

 

CIRCUIT

 

 

 

 

 

 

ENABLE

 

To 41 at Main

Transformer

DC-600

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Page 54 Page 56
Contents DC-600 ISAFETYi Can be dangerous SafetyElectric Shock can kill Fumes and GasesFor Electrically Powered equipmentSûreté Pour Soudage a L’Arc Précautions DE SûretéElectromagnetic Compatibility EMC Safety Master Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications DC-600 InstallationElectric Shock can Kill Safety PrecautionsSelect Proper Location Electrical Input Connections Fuse and Wire SizesGround Connection Connection for Highest Rating Plate VOLTAGE, 50 or 60 HZ Reconnect ProcedureConnection for 440 Volts 50 or 60 HZ V 60HZ See Machine Rating Plate for Required Input Supply Voltage ELECTRODE, Work and #21 Lead Output ConnectionsConnections Terminal Strip 1 T.S.1 Auxiliary Power Control ConnectionsTerminal Strip 2 T.S.2 DC-600 Table of Contents Operation Section Operation Safety PrecautionsGeneral Description Design Features AdvantagesRecommended Processes and Equipment Output Control Output Voltage Current Meanings of Graphical Symbols on Case FrontOFF Input Power Welding CapabilityControls and Settings Meaning of Graphical Symbol for Ground CON- NectionOVERLOAD, OVERCURRENT, and Fault Protection Auxiliary Power in MS-RECEPTACLEWelding Procedure Recommendations Remote Control of Machine OperationOperating Steps Remote NA-3 Automatic Wire FeederLN-7 and Other Constant Wire Feeders LN-8 or LN-9 SEMI-AUTOMATIC Wire FeederDC-600 Table of Contents Accessories Section Field Installed Options AccessoriesWire Feeders and Tractors Factory or Field Installed OptionsFigure C.2 MULTI-PROCESS Switch Cable Connections Accessories Table of Contents Maintenance Section Safety Precautions Electric Shock can Kill MaintenanceRoutine and Periodic Maintenance 1TABLE of CONTENTS-THEORY of Operation Section E-1 Input Circuit and Main TRANS- Former Theory of OperationRectification Firing CIRCUIT, Control CIR- Cuit and RectificationFiring Board Thermal Protection SCR Operation DC-600 1TABLE of Contents Troubleshooting and Repair F-1 HOW to USE Troubleshooting Guide 2TROUBLESHOOTING and REPAIRF-2PC Board Troubleshooting Procedures Troubleshooting and RepairControl Feeder. See Protective Devices Check all three phase input Output Control J1,Pin2. See Wiring Diagram Wiring Diagram Test Description PC Board Troubleshooting GuideMaterials Needed PC Board Troubleshooting Guide Figure F.2 Control Board LEDs Control BoardDC-600 Internal Trigger Circuit Test Internal Trigger Circuit Test Procedure75 76 Internal Trigger Circuit TestDC-600 Firing Board Test Firing Board Test Control Board Test Figure F.7 Control Board Control Board TestMain Transformer Voltage Test Figure F.8 Input Contactor and Reconnect Panel Main Transformer Voltage TestFigure F.9 Transformer Secondaries Main Transformer Voltage Test Control Transformer Test Control Transformer Test ProcedureInput Contactor Test Voltage Test Input Contactor TestSCR Bridge Test SCR Bridge Test Anode Cathode Remove Insulating PaintActive Test Scope Settings Maximum Output Setting no Load Minimum Output Setting no Load 35TROUBLESHOOTING and REPAIRF-35 2V/Div Volts DC-600 Input Contactor CR1 CLEANING/REPLACEMENT Cleaning Procedure Input Contactor CLEANING/REPLACEMENT ProcedureContactor Replacement Procedure SCR Rectifier Bridge Removal and Replacement Procedure SCR Rectifier Bridge 42TROUBLESHOOTING and REPAIRF-42Removal and Replacement Procedure Removal ProcedureInsulator Lock Washer Plain Washer Output Snubber Lead Replacement ProcedureDC-600 Main Transformer and Choke Removal and Replacement Main Transformer and Choke Removal and ReplacementRemoval Procedure Weld Maximum Open Circuit Voltages Input Idle Amps and WattsDC-600 Table of Contents Diagram Section Electrical Diagrams Wiring Diagram 230/460/575 Volt Machines G3506-1 Schematic Complete Machine G3575 Schematic Control PC Board G3408-1 Control PC Board Assembly G3409-1 Schematic Firing PC Board G3741-1
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