Electrical diagrams, Control pc board (g2588) schematic, Idealarc dc400 – Lincoln Electric IDEALARC SVM 122-A User Manual

Page 114: Firing circuit

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G-7

ELECTRICAL DIAGRAMS

IDEALARC DC400

Control PC Board (G2588) Schematic

1400V

.0047

C51

RF

+15V

-10V

+15V

+15V

10K

R85

1.50K

R301

50V

4

C33

1N4004

D55

475K

R128

1N4004

D57

1.00M

R80

1N4004

D56

100K

R59

-7.5V

X2

8

10

9

475K

R99

10K

R123

+15V

1N4004

D59

VOLTAGE BUFFER

RECTIFIER BRIDGE

+15V

1N4004

D41

1.8
20V

C32

1N4004

D60

100

R126

1N4004

D42

1N4004

D61

10K

R98

2N4857

Q1

1N4004

D40

1W

15V

DZ6

1.8
20V

C15

102K

R100

X2

7

5

6

61.9K

R122

1.50K

R97

13.7K

R300

13.7K

R96

X3

14

13

12

-10V

SWITCH

CURRENT

PROTECTION

OVER-VOLTAGE

CAPACITOR

82.5K

R132

100

R127

100K

R57

X4

1

2

3

2.21K

R50

4.7
35V

C44

R328

R321

R320

R319

R318

R316

R317

R322

100K

R153

10W

160

R151

J1

7

R327

1W

6.2V

DZ12

R323

R324

1N4004

D77

1N4004

D76

1N4004

D78

R326

R325

41

NOTES :

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

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

NUMBER.

N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE

FILE: G2586-1BD

C

-7.5V

+15V

+15V

100K

R42

-10V

10K

R138

15W

1.5K

R149

1N4004

D25

475K

R131

X1

14

12

13

100

R152

J2

1

X1

8

10

9

1N4004

D30

10K

R48

1N4004

D75

5W

15V

DZ13

1N4004

D26

CNY17-3

OCI1

4

2

1

6

5

1N4004

D29

J2

4

22.1K

R130

-10V

+15V

ARC FORCE
CONTROL

MODE BUFFER

ARC FORCE AMP

POT.

204

209

10K

10K

R46

CC LOW VOLTAGE

CC MAX
OUTPUT

STABILIZER

208

15W

1.5K

R150

10K

R47

47.5K

R111

1.50K

R304

OUTPUT

10K

CONTROL
POT.

50V

.022

C19

10K

CW

R71

CW

10K

R67

MODE INVERTER

75

10K

R68

-7.5V

-7.5V

+15V

-10V

50V

.022

C18

RF

J2

10

-10V

+15V

+15V

CV MAX

MIN. OUTPUT BUFFER

OUTPUT

+

t

56

R78

1N4004

D34

212

213

BUFFER

MAX.

OUTPUT

2N4857

Q3

+

t

56

R81

RF

100

R75

X1

7

5

6

267K

R74

392K

R73

J2

8

267K

R72

1N4004

D35

RF

100K

R105

1.82K

R115

4.75K

R93

100K

R315

1.8

20V

C22

15.0K

R94

+15V

1N4004

D62

1N4004

D28

475K

R69

2N4857

Q4

1N4004

D27

5.1V

DZ7

1.50K

R54

332K

R52

10K

R70

10K

R53

100K

R51

100K

R49

750

R305

267

R76

750

R77

1N4004

D33

J2

9

50V

.022

C17

1N4004

D32

+

t

56

R79

X1

1

2

3

1N4004

D13

LM224

X4

4

11

1N4004

D16

102K

R119

J3

1

50V

.022

C10

J3

2

J3

4

1N4004

D10

G1

+15V

EARTH GROUND CONNECTION

COMMON CONNECTION

.022/50V

(UNLESS OTHERWISE SPECIFIED)

GENERAL INFORMATION

1A, 400V

RESISTORS = Ohms (

(

ELECTRICAL SYMBOLS PER E1537

1/4W

CONTROL BOARD SCHEMATIC

IDEALARC DC400

FRAME CONNECTION

SUPPLY

LABELS

POWER SUPPLY SOURCE POINT

G3

UNLESS OTHERWISE SPECIFIED)

UNLESS OTHERWISE SPECIFIED)

CAPACITORS =

MFD

DIODES =

100K

R30

1N4004

D18

562

R32

1N4004

D15

562

R311

50K

CW

R28

50V

.022

C12

50V

.022

C9

562

R34

100K

R31

203

10K

R145

X4

8

10

9

10K

R144

1N4005

D73

1N4005

D71

GND

IN

OUT

X5

1N4005

D70

1N4005

D72

201

202

10W

250

R148

RF

1W

2.7

R155

150
50V

C43

5W

17V

DZ9

10K

R147

500
50V

C40

1W

2.7

R154

31.6K

R118

1N4005

D69

1N4005

D68

2K

CW

R117

1N4004

D22

10K

R142

1N4004

D82

+

REF

-

TL431

X7

1

6

8

10K

R91

10K

R64

10K

R116

1N4004

D49

1N4004

D48

5W

10V

DZ10

1.00K

R63

-10V

A

+15V

M

50V

.022

C34

10K

R143

221K

R156

1N4005

D19

10K

R140

J1

3

J1

2

47
35V

C39

J1

1

1N4004

D74

1N4005

D21

1N4005

D20

1N4004

D23

5W

1K

R141

D

2586

G

220

202

POWER UP

OUTPUT CLAMP

201

203

J2

3

J1

6

LM224

X3

4

11

2.67K

R146

1N4004

D79

LM224

X1

4

11

+15V

4.7
35V

C41

LM224

X2

4

11

50V

.022

C30

1N4004

D63

1.00M

R66

50V

4

C24

15.0K

R134

68.1K

R124

475K

R62

50V

.68

C35

1N4004

D64

33.2K

R65

22.1K

R95

15.0K

R90

10K

R83

1N4004

D36

1N4004

D50

15.0K

R139

1N4004

D37

50V

0.1

C56

1N4004

D47

475K

R89

X3

8

9

10

X3

1

2

3

1N4004

D31

CC CONTROL AMP

1N4004

D52

X4

12

14

13

1N4004

D46

221K

R135

1N4004

D54

26.7K

R125

22.1K

R129

X3

7

5

6

RF

+15V

-10V

LIMITER

CC CURRENT

C.V. CONTROL

START PRESET

LIMITER

CV CURRENT

1.8

20V

C20

33.2K

R88

200V

.33

C23

100K

R137

2N4857

Q8

4.7
35V

C36

1N4004

D51

X2

1

3

2

2N4123

Q5

26.7K

R44

1N4004

D58

4.75K

R82

C59

C58

C68

C57

-10V

C67

200

R307

267

R24

267

R23

200

R306

B

1W

15V

DZ4

13.7K

R40

225

13.7K

R108

100V

.047

C38

J2

11

100V

.047

C37

J2

12

J2

6

J2

5

13.7K

R303

475

R36

1N4004

D45

C45

475

R35

J2

2

-10V

1N4004

D44

13.7K

R302

1400V

.0047

C14

J1

9

2

240

204

4

214

1N4004

D24

100

R45

100K

R41

50V

.022

C16

243

R312

1N4004

D80

J1

10

243

R313

J1

4

5W

24V

DZ14

1N4004

D81

R316-R328=68.1k 1/4W

243

R314

J1

8

.22
100V

C26

24.9

R38

475

R37

22.1K

R55

2.21K

R58

33.2K

R102

RG1

REF

RG2

X6

8

1

5

3

6

2

267K

R104

1N4004

D53

1N4004

D43

475K

R106

.047

100V

C25

5.62K

R110

26.7K

R107

X2

14

13

12

332K

R101

1.50K

R109

1W

30V

DZ8

1.00M

R103

+15V

1.00K

R20

QU1

5W

68

R114

202

1N4004

D67

267

R25

200

R308

201

1/2W

27

R3

1N4004

D66

4.7
35V

C1

5W

68

R112

1W

15V

DZ1

RF

J

I

H

N

4.7
35V

C2

1W

15V

DZ2

5W

68

R113

1/2W

27

R2

475

R10

1N4004

D4

100K

R12

100V

.15

C5

4.75K

R18

400V

4A

SCR3

1N4004

D2

1N4004

D65

1/2W

27

R1

D

G

S

15A
60V

Q2

1N4004

D8

1N4004

D7

267

R14

1W

15V

DZ5

400V

4A

SCR1

1.00K

R21

2.67K

R4

1N4004

D1

100K

R11

4.75K

R17

400V

4A

SCR2

QU2

267

R15

2.67K

R5

1N4004

D5

2.67K

R7

100V

.15

C4

475

R86

2.67K

R8

267

R16

1.00K

R22

203

1N4004

D3

475

R87

FIRING CIRCUIT

100K

R13

QU3

100V

.15

C6

4.75K

R19

1N4004

D9

1N4004

D6

1W

15V

DZ3

2.67K

R9

4.7
35V

C3

2.67K

R6

G

SHT.

82

LAST NO. USED

68

C-
R-

D-

NO.

328

2586

VOLTAGE NET

X6

AD620

7

4

50V

.022

C31

X4

7

5

6

51.1K

R120

C61

+15V

-7.5V

204

G2

33.2K

R121

C60

J3

3

1N4004

D14

50K

CW

R27

562

R33

1N4004

D11

562

R309

562

R310

100K

R29

50V

.022

C7

1N4004

D17

50K

CW

R26

50V

.022

C11

50V

.022

C8

1N4004

D12

206

205

CURRENT AMP

J2

7

+15V

J1

5

E

10K

R56

L

K

2N4857

Q6

6.81K

R61

3.01K

R60

+15V

-10V

RF

+15V

F

-7.5V

+15V

G

B

3-11-94

G-7

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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 result
in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the machine.

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