Lincoln Electric SVM123-A service manual Firing PC Board G1486-5 and above Layout

Page 110

Section TOC

Master TOC

G-5

ELECTRICAL DIAGRAMS

G-5

Firing PC Board (G1486-5 and above) Layout

 

 

Return to

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to

Return to Master TOC

Return to Master TOC

Return to Master TOC

 

 

 

 

 

 

 

 

 

J7

 

 

 

 

J6

 

 

 

 

J4

 

 

J5

 

 

 

 

 

 

 

 

 

R50 R49

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R57

 

 

 

LED7 LED8 LED9

D9

 

D22D25

 

R41

D23

D28

R46D31

R47D32

 

D33

 

D26

D29

DZ3

R42

D27

D24

 

R45

 

R51

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R56

 

 

 

 

 

 

QU1

 

 

QU2

 

 

 

 

QU3

 

 

R55

 

 

 

 

R40

 

C25

R64

C26

R65

R48

D30

 

 

D1 D4

 

 

 

D8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D2

 

 

 

 

 

R43

DZ1

DZ2

C10

R44

R52

 

 

 

R53

 

C11

 

 

C27

R66

R54

 

C12

 

 

 

 

TP1

TP2

TP3

 

D3

D6

D7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D5

 

 

 

 

 

 

C4

 

SCR4

 

R61

LED2

C7

 

 

C5

 

 

SCR5

 

 

R62

LED4

 

C8

C6

SCR6

R63

LED6

C9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R13

 

 

 

 

 

 

 

 

 

 

 

 

R14

 

 

 

 

 

 

R15

 

 

 

 

 

 

D37

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C16

 

C22

R31

D19

D10

 

 

 

 

 

 

 

C17

 

C23

R32

D20

D11

D39

C18

C24

R33

D21

D12

 

 

 

R19

 

 

 

 

 

 

 

 

R20

 

R21

 

 

 

 

R25

 

 

 

 

 

 

 

 

 

 

 

 

R26

 

 

 

 

 

 

R27

 

 

 

 

 

 

 

 

R37

 

 

 

 

 

 

 

D38

 

 

 

R38

 

 

 

 

 

 

R39

 

 

 

 

 

 

C1

 

SCR1

 

R58

LED1

 

 

 

 

C2

 

 

SCR2

 

 

R59

LED3

 

 

C3

SCR3

R60

 

LED5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R10

 

 

 

 

 

 

 

 

 

 

 

R11

 

 

 

 

 

 

 

 

R12

 

 

 

 

 

 

D34

 

C13

 

C19

R28

D13

D16

 

 

 

D35

 

 

C14

 

 

C20

R29

D14

D17

 

D36

C15

C21

R30

D15

D18

 

 

 

R16

 

 

 

 

 

 

R17

 

 

 

R18

 

 

 

 

R22

 

 

 

 

 

 

 

 

 

 

 

R23

 

 

 

 

 

 

 

 

R24

 

 

 

 

 

 

 

 

R34

 

 

 

 

 

 

 

 

 

 

 

R35

 

 

 

 

 

 

 

 

R36

 

 

 

 

 

 

G1486-5

FIRING BOARD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R9

 

 

 

 

 

 

 

 

 

 

R4

 

 

 

R1

 

 

 

 

 

 

 

 

 

R2

 

 

 

R5

 

R3

 

 

 

R6

 

 

 

 

 

 

 

 

 

 

 

 

R7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/4W 150

1/4W 1.5 K

1/4W 475

1/4W 2.67 K

1/4W 26.7 K

1/2W 5.1

1/4W 332K

NOTE: Lincoln Electric assumes no responsibility for liablilities 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 discourages board level troubleshooting and repair since it may compromise the quality of the design and may resultIDEALARC DC1000 in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the machine.

Page 109 Page 111
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Page 109 Page 111
Contents Idealarc Safety Electric and Magnetic FieldsElectric Shock can kill Welding Sparks can cause fire or explosion Précautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Installation Technical Specifications Idealarc DC OutputElectrical Input Connections Electric Shock can KillSelect Proper Location StackingInput Power Supply Connections Reconnect ProcedureFuse and Wire Sizes Ground ConnectionFigure A.3a Input Connection Diagram Figure A.3c -Input Connection Diagram Figure A.3d Input Supply Connection Diagram Output Connections Connection for AIR/CARBON ARC Cutting OperationIdealarc DC-1000 Operation Safety Instructions Electric Shock can killGeneral Description Operational Features and ControlsDesign Features Advantages Recommended Processes and EquipmentWelding Capability Controls and Settings Return to SectionNA-3 Automatic Wire Feeder Welding Procedure RecommendationsRemote Control of Machine Operation ARC Striking with Idealarc DC-1000 and the NA-3 Start Board LN-8 SEMI-AUTOMATIC Wire Feeder RemoteAccessories Table of ContentsIdealarc DC-1000 OPTIONS/ACCESSORIESConnecting the NA-3 or LT-7 to Remote Output Control OptionalConnecting the NA-5 to the Idealarc DC-1000 Figure C.2 NA-5 Wire Feeder Connection to Idealarc DC-1000Connecting the LN-8 to the Idealarc DC-1000 Connecting the LN-9 Wire Feeder to the Idealarc DC-1000 Connecting the LN-7 Wire Feeder to the Idealarc DC-1000 Maintenance Safety Precautions Electric Shock Can Kill Routine and Periodic MaintenanceFigure D.1 Major Component Locations Idealarc DC-1000 Theory of Operation Input Line VOLTAGE, Contac TOR, and Main TransformerOutput Rectification CONTROL, and FeedbackProtection Devices Circuits Contactor HOLD-INSCR Operation Figure E.5 SCR OperationIdealarc DC-1000 Troubleshooting & Repair HOW to USE Troubleshooting Guide Locate Problem SymptomPC Board Troubleshooting Procedures Board can be damaged by static electricityControl Transformer Test Return Return to Master TOC Return Return to Section TOC Perform SCR Output Bridge Troubleshooting & Repair Function Problems Perform Firing Board Test Perform Control Board Test SCR Output Troubleshooting & Repair Test Description Control Transformer T2 Voltage TestTest Procedure Figure F.1 Control Transformer Lead LocationFigure F.2 Control Transformer X1 and X2 Test Points Main Transformer T1 Voltage Test Test Description Figure F.4 Main Secondary Lead Test Points From Expected VAC Firing Board Test Test Procedure for Normal Firing Board Operation Figure F.7 Terminal Strip Jumper Wire Connections Figure F.8 Output Pilot Relay 4CR Location Table F.1 LED 7, 8 and 9 Check List ThenControl Board Test Test Procedure for Normal Control Board Operation Figure F.9 Control Board LED and Pin LocationsPossible Problems Pertaining to the Control Board If LED 1 does not light, when the start switch is onFigure F.11 LED 2 Open Circuit Voltage Test Points If LED 4 lights Static SCR Test Test Procedure Figure F.12Figure F.13 SCR Heat Sink Assembly Test Points Static SCR Test Active SCR Test Active SCR Test Figure F.16 Heat Sink Assembly Test Points Battery Test Scope Settings Troubleshooting & Repair Troubleshooting & Repair Troubleshooting & Repair Troubleshooting & Repair Troubleshooting & Repair Troubleshooting & Repair Input Contactor 1CR Cleaning AND/OR Replacement Cleaning Procedure Figure F.18 Input Contactor Cover RemovalContactor Replacement RemovalInstallation SCR Output Bridge Replacement SCR Output Bridge Removal Figure F.22 Preparation For SCR Output Bridge RemovalFigure F.23 SCR Output Bridge Removal Removal of Individual SCR Heat Sink Assemblies SCR Heat Sink Installation SCR Output Bridge InstallationTOC Removal and Reassembly of Lift Bail Removal of Lift Bail Figure F.25 Lift Bail RemovalReassembly of Lift Bail Main Transformer Removal and Installation Main Transformer Disassembly and Assembly Figure F.26 Main Transformer DisassemblyMain Transformer Disassembly Coil Removal ReplacementTransformer Installation Transformer ReassemblyIdealarc DC-1000 Input Idle Amps and Watts Open Circuit VoltagesIdealarc DC-1000 Electrical Diagrams Idealarc DC-1000 Wiring Diagram Codes 9919 Operating Schematic Control PC Board G1585 Layout Firing PC Board G1486-5 and above Layout Control PC Board G1585 Schematic Firing PC Board G1486-5 and above Schematic Output Snubber M14312 Schematic
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