Lincoln Electric SVM118-A service manual Control PC Board

SQUARE WAVE TIG 355

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G-8

ELECTRICAL DIAGRAMS

G-8

Control PC Board

3

X32

4

OCV BOOST

Q9

R66

R67

J14

6

DC RELAY

*

9

3.01K

(G2512) Schematic

X3

8

R73

600mA

3.01K

680

10

ARC START

3

J9

SWITCH INTERFACE

+5V

STICK

12

4.75K

40V

Q1

R9

R12

600mA

1W

+5V

R8

J14

7

AC RELAY

*

R11

J13

8

GAS ON

*

3.01K

Q2

R51

10K

AC MODE

13

X3

R7

600mA

3.01K

4.75K

40V

680

R49

475

D20

D22

R50

1.50K

4.75K

40V

1W

J13

ARC START *

D62

R100

10K

POT INTERFACE

VREF

20

R13

9

HI FREQ ON

*

19

X2

Vcc

Q3

R53

10K

18

X1

X

4

5

STICK

J11

D32

X17

R14

600mA

1.00K

C46

3

R101

+5V

17

X0

NC

3

4.75K

40V

24 VAC Input

R52

OCI1

100

PEAK CURRENT

J10

16

X3

NC

14

CNY17-3

D63

13

VREF

R81

BIT I/O

C51

2

6

4

100

D33

X4

ANALOG

LTEN

18

D58

10K

6

X5

MUX

EN1

7

15V

R96

D37

2

X6

EN2

8

LED/DISPLAY INTERFACE

R55

475

D21

D24

C73

R54

J11

J10

5

X7

A

15

DATA[0]

DATA[0]

20

681K

150p

REMOTE

R97

AC BALANCE

10

R84

3

1D

Vcc

50V

VREF

9

Vee

B

13

DATA[1]

DATA[1]

4

X42

2

13

16

J9

+5V

100

100

2D

1Q

DTIN

Vcc

SWITCH COMMON

D39

10

12

DATA[2]

J12

+5V

D59

GND

54HC4351

C

DATA[2]

7

3D

2Q

5

A0

Q0

4

I0

O0

16

6

GASWAT

*

D40

DATA[3]

8

4D

3Q

6

2

A1

X13

Q1

5

2

X25

O1

15

J12

HI FREQ

*

7

+5V

J12

R138

475

D23

D87

R117

R10

R108

J10

VREF

DATA[4]

13

5D

4Q

9

3

A2

DECODE

Q2

6

3

I2

O2

14

9

ARC

*

J12

1.50K

10K

D70

10K

AFTERFLOW

15

R85

DATA[5]

14

6D

5Q

12

14

EN

1 OF 8

Q3

7

4

I3

O3

13

J12

START

*

HF OFF

J11

R109

100

D41

D79

5

DATA[6]

17

7D

6Q

15

15

RST

Q4

9

5

I4

LED

O4

12

10

PEAK

*

R116

10K

7

BIT I/O

D42

DATA[7]

18

16

12

10

6

J12

AC MODE

+5V

6

8D

54HC373

7Q

Q7

Q5

I5

DRIVER

O5

BACKGND

*

24 VAC Input

R139

1.00K

100

D71

PREFLOW

J10

3

/K

SET

Q

G

8Q

19

8

GND

Q6

7

I6

O6

10

J12

12

CRATER

*

5

3

R86

VREF

4

CLK

X19

7

10

GND

O CTRL

54HC259

8

GND

CLAMP

9

C62

CNY17-3

D74

R112

10K

100

D44

D34

R131

4.75K

2

J

RST

/Q

MC1413BP

OCI4

HF CONTINUOUS

J11

3

TP1

OP3 B7

+15V

D88

D89

C72

2

6

4

9

+5V

R113

AC MODE

7

20

STICK FORCE

J10

7

J12

LED POWER

R140

475

18

100

3D

Vcc

14

VREF

R82

DATA[3]

5

15V

D75

4

2D

X11

1Q

2

DATA[0]

100

-15V

X38

14

R162

C25

C68

R27

C74

3

1D

2Q

5

DATA[1]

D36

HARD_RST

RESET 1

VCC

0.1

4.7

J9

D45

Q11

1.00K

50V

35V

J11

DC MODE

8

681K

150p

10K

8

4D

3Q

6

DATA[2]

9

Vee

Vcc

20

2

2

DATA 1

RESET 2

13

HARD_RST

R161

14

50V

D66

R104

600mA

13

5D

LATCH

4Q

9

DATA[3]

SPOT TIME

4

J10

R88

17

X0

X18

X

4

LED SET *

3

CLOCK 1

DATA 2

12

4.75K

40V

AUTO BALANCE

SHOW VOLTS

J11

14

12

DATA[4]

VREF

18

3

4

SET 1

CLOCK 2

CLKOUT

R105

6D

5Q

100

X1

NC

LED

5

+5V

D47

5

Q1

SET 2

10

17

7D

6Q

15

DATA[5]

19

X2

NC

14

X39

+5V

J11

100

HARD_RST

DATA[6]

D48

NC 6

/Q1

Q2

9

13

D67

18

8D

54HC373

7Q

16

16

X3

LTEN

AMPTROL INTERFACE

G

8Q

19

DATA[7]

START CURRENT

J10

R89

X4

EN1

7

7

GND

54HC74

N.C.

8

+5V

D60

10K

10

5

MUX

R98

GND

O CTRL

VREF

100

D49

6

X5

EN2

8

J12

DIPLAY VCC

SPOT

J11

D50

2

X6

A

15

DATA[0]

C65

2

+5V

R99

5

X7

B

13

DATA[1]

27

J12

R126

100

START TIME

J10

10V

2

DISPLAY GND

6

R92

10

GND

C

12

DATA[2]

4.75K

D61

54HC4351

+15V

A=2.43

100

VREF

3.32K

10K

+5V

D51

RESET 1

VCC

14

100

J12

DISPLAY DATA

R58

R102

HARD_RST

R119

3

+15V

C56

D64

J10

D52

2

DATA 1

RESET 2

13

HARD_RST

16

R120

100

J12

DISPLAY CLK

Q10

50V

VREF

SHOW START CUR

J11

R103

PULSE FREQUENCY

7

R93

3

CLOCK 1

DATA 2

12

13

DTIN

Vcc

OP2 B8

4

600mA

4

+5V

VREF

100

BITS OUT *

4

SET 1

CLOCK 2

CLKOUT

A0

Q0

4

TP1

100

8

D85

40V

D65

D53

5

Q1

X41

SET 2

10

+5V

2

A1

X14

Q2

6

D54

NC 6

/Q1

Q2

9

3

A2

Q3

7

J9

PTC1

13

D68

10K

1 OF 8

REMOTE HI

R106

J10

7

GND

N.C.

8

14

EN

DECODE

Q1

5

J13

5

R125

R124

R123

X29

BACKGROUND

OVER_VOLT

Vout=10.2V

+ t

D84

14

8

R94

5

X32

6

54HC74

15

RST

Q6

R32

10

POWERDOWN

267

47.5K

10K

12

J11

20

100

VREF

(Voltage FB)

1W

680

(To Opto-triac

56

START

CUR

R107

G

Vcc

D86

R127

6

+5V

ARC START *

13

5D

X12

1Q

2

DATA[8]

D55

CUR_GAIN

12

Q7

Q5

10

D13

2

Q4

Interlock Circuit)

C52

4.75K

100

D69

D56

(X30 Current FB)

8

GND

Q4

9

X32

R33

600mA

3

1D

2Q

5

DATA[9]

54HC259

.02

4.75K

40V

600V

10K

4

2D

3Q

6

DATA[10]

PULSE %

9

J10

R95

R133

10K

VREF

D72

R110

7

3D

LATCH

4Q

9

DATA[11]

VREF

100

D57

+15V

PULSE

J11

8

4D

5Q

12

DATA[12]

D35

8

R111

+5V

14

6D

6Q

15

DATA[13]

D25

100

17

7D

7Q

16

DATA[14]

CRATER FADE

J10

D26

D73

54HC373

12

R83

VREF

R75

5

J9

18

19

DATA[15]

J14

REMOTE TAP

6

R63

R60

10

8D

8Q

100

D38

A/D INTERFACE

SCR/BACKGND CNTRL

10K

X26

7

R76

5

4

BACKGND CMD

1.00M

REM CUR

D76

R114

10

D43

4.75K

4.75K

X26

8

R61

10K

GND

O CTRL

6

1K

D27

9

332

J11

J10

100

OCI3

C61

C53

R46

D28

CRATER

R115

TP1

CRATER CURRENT

R87

R78

CNY17-3

243

10

IP2 B15

.02

R62

100

3

47.5K

2

6

4

J9

PTC2

600V

+15V

-15V

D77

TP1

VREF

D46

10K

D31

J14

5

BACKGND GND

REMOTE LOW

7

J11

IP2 B14

R80

SWITCH GND

R118

2

+ t

12

+5V

R90

R79

681K

100

56

3.01K

Offset

3.01K

J10

100

R152

Adjust

R153

POT REF

R74

CLK Aa

Vcc

16

R151

CLKOUT*

2

15

+15V

D96

R159

100

R134

475

RSTa

CLK Ab

R154

CW

D93

J11

10K

J10

VREF

+5V

3

QAa

X2

RSTb

14

D92

1K

R160

POT GND

2

R135

100

4

CLK Ba

QAb

13

R64

267

+15V

2/4 STEP

12

20

20

100

REF+

Vcc

G

Vcc

5

QBa

CLK Bb

12

TP1

2700p

100

D97

AG IN

D0

2

3

1D

X40

1Q

2

DATA[0]

RIPPLE

R155

100K

C1

X16

6

QCa

QBb

CURRENT TEST

10

R149

50V

REF-

D1

3

4

2D

2Q

5

DATA[1]

7

QDa

COUNTER

QCb

10

CLN

3

Q5

10K

C50

0.1

50V

+5V

18

/OFLW

D2

4

7

3D

3Q

6

DATA[2]

8

GND

QDb

9

51.2 KHZ 20%

2

X3

R65

600mA

J14

SCR CLN

*

R35

R38

R146

+5V

19

NC

D3

5

8

4D

4Q

9

DATA[3]

54HC390

1.50K

C54

40V

2

51.1K

4.75K

10K

R36

9.09K

1.00K

LATCH

Q6

R91

16.2K

D14

CLK1

2

7

14

13

12

DATA[4]

+15V

2700p

R37

R31

10K

Current

Gain

CLKOUT

MODE

D4

5D

5Q

50V

8A

Rectifier

R144

CW

Calibration

12

X15

Q H

9

6

/WR

A/D

D5

15

14

6D

6Q

15

DATA[5]

150V

J8

+15V

13

SS/PL

13

16

17

16

DATA[6]

C55

CURRENT FB+

R34

D16

Balance

500

/CS

D6

7D

54HC373

7Q

R69

267

10K

R68

CW

10K

R39

2

CW

1K

Adjust

14

ABCD

Q H

7

8

/RD

D7

17

18

8D

8Q

19

DATA[7]

1.00K

D15

R128

10K

X29

R129

R41

6

3

E

CLK2

15

10

GND

/INT

9

10

GND

O CTRL

J14

To Shunt

C69

SHIFT

TLC0820AI

3

SCR GND

R136

100

3

D17

4.75K

X29

7

4

F

REGISTER

SA

10

PEN

1.50K

0.1

NULL

NULL

8

5

6

5

6

Q7

J14

50V

-15V

2

INPUT

V CC

7

R43

5

G

74HC165

H

4

X3

R70

600mA

SCR PEN

*

J8

X27

4.75K

DATA[0:15]

C57

40V

Q8

CURRENT FB-

3

INPUT

OUT

6

2

R40

R42

4.75K

8A

1K

4

VEE

NC

5

50V

150V

2700p

OP27

+5V

10K

C58

R71

VREF

FB CURRENT->

"Select Channel and Convert"

10

D94

8

XA

Vcc

14

13

/K

SET

Q

10

CURRENT/VOLTAGE FEEDBACK

X28

R157

D95

X30

"25us Timeout" ->

X19

"Missed Watchdog Reset*"

9

1.00K

4

XB

YA

2

12

CLK

8

XC

YB

3

<-

A/D EOC*

Q12

V CC

16

14

J

/Q

9

ANALOG

R48

XD

YC

9

NC

2

Q6

X10

Q11

15

RST

SWITCH

+5V

J9

+15V

6

Cctrl

YD

10

NC

3

Q5

Q10

14

15

VOLTAGE FB

2

10K

150K

13

5

<-FULL RANGE CURRENT

4

Q7

Q8

13

TIMER

5

6

D_TIMER*

TP1

(Electrode

R156

Actrl

Bctrl

BITS IN*

6

Y2a

VCC

16

X34

5

FAULT DETECT

Terminal)

7

GND

Dctrl

12

1 / A=1

5

Q4

Q9

12

Logic 0 / A=16

R25

22.1K

54HC4066

"DATA ENABLE" ->

*

select a

Y0a

4

TP1

9

IP0_STB*

6

Q3

RIPPLE

R

4

R72

10K

VREF

A/D READ* ->

COUNTER

X20

2

A0a

X35

Y1a

5

7

10

6

D9

D18

ADDRESS[0]

3

1D

Vcc

20

3

7

Q2

C

5

TP1

6

WATCHDOG

FB Voltage

10

A1a

Y3a

DATA_RD1

8

GND

Q1

9

10

X20

DISABLE

*

CW Calibration

ADDRESS[1]

4

2D

X36

1Q

2

15

select b

12

HARD_RST

X32

C71

12

X29

8

R158

12

X32

13

CUR_GAIN

Y0b

NC

74HC4040

3

2

HARD_RST

R132

(X14 pin12)

ADDRESS[2]

7

3D

2Q

5

14

A0b

Y1b

.02

500

X31

14

9

1.00K

D19

8

4D

3Q

6

NC

600V

13

13

5D

4Q

9

13

A1b

Y2b

10

CLKOUT

D11

8

GND

Y3b

9

NC

C48

VREF

"WRITE ENABLE" ->

*

14

6D

5Q

12

NC

74AC139

5

2

X23

3

R22

1.50K

17

7D

6Q

15

NC

3

SET

6

18

8D

7Q

16

LWE*

/K

Q

15

16

4

CLK

X24

-15V

CLKOUT*

G

74AC373

8Q

19

NC

A

X37

Vcc

7

RST

10

D5

10

2

B

/Y5

10

IOWR1*

2

J

/Q

13

/K

Q

6

GND

O CTRL

3

14

A/D SET *

RST

12

CLK

X24

"Multiple Watchdog Resets"

FB VOLTS

C

/Y1

9

R16

10

X28

7

R142

4

13

BITS OUT *

14

J

/Q

/G2A

/Y2

HARD_RST

R1510K

10K

X31

8

R17

5

267

5

12

LED SET *

"Interrupt uP" X4pin5

SET

9

4.75K

D8

/G2B

/Y3

SOFT WATCH *

"Watchdog Reset ->"

INT

+5V

4.75K

6

G1

/YO

15

CLKOUT

R19

R20

6

C47

SOFT ERR*

"Software Error Detected"->

R18

IOWR3*

7

/Y7

/Y4

12

7

10K

10K

X31

MAIN PROCESSOR

8

GND

/Y6

9

IOWR2*

13

X20

D6

5

74AC138

HARD_RST

+5V

R23

2

CLK1

2

10

VREF

ADDRESS[0:11]

10K

X31

R24

R21

4.75K

D7

12

X22

Q H

9

4

X23

8

3

D10

R148

51.1K

+5V

+5V

13

SS/PL

X23

6

9

10K

5

14

ABCD

Q H

7

R28

4.75K

30.1K

D12

ADDRESS[0]

2

A0

D0

26

DATA[0]

Vpp

Vcc

28

3

E

CLK2

15

R26

2

ADDRESS[1]

A1

D1

25

DATA[1]

DATA[0]

D0

A0

10

ADDRESS[0]

4

F

SA

10

X28

R130

ADDRESS[2]

40

A2

D2

24

DATA[2]

DATA[1]

12

D1

X5

A1

9

ADDRESS[1]

5

G

74HC165

H

6

CLKOUT*

3

10K

D91

ADDRESS[3]

39

A3

X4

D3

23

DATA[3]

DATA[2]

13

D2

A2

8

ADDRESS[2]

ADDRESS[4]

DATA[4]

DATA[3]

ADDRESS[3]

38

A4

D4

22

15

D3

A3

7

68.1K

C49

OVER_VOLT

ADDRESS[5]

37

A5

D5

21

DATA[5]

DATA[4]

16

D4

A4

6

ADDRESS[4]

CLK1

2

HARD_RST

R30

R29

ADDRESS[6]

36

20

DATA[6]

DATA[5]

17

5

ADDRESS[5]

12

X21

Q H

9

(X20 pins 2,5,10,13;

18

D78

(Powerdown Circuit)

A6

D6

D5

A5

13

X13,14,24,4,39,41)

15V

10K

ADDRESS[7]

35

A7

D7

19

DATA[7]

DATA[6]

18

D6

A6

4

ADDRESS[6]

13

SS/PL

X23

ADDRESS[8]

34

A8

D8

DATA[8]

DATA[7]

19

D7

EPROM

A7

3

ADDRESS[7]

+5V

12

14

ABCD

Q H

7

+5V

10

Vss

D9

12

DATA[9]

26

NC

A8

25

ADDRESS[8]

3

E

CLK2

15

ADDRESS[9]

29

A9

Vcc

30

27

/PGM

A9

24

ADDRESS[9]

4

F

10

ADDRESS[10]

28

A10

D10

13

DATA[10]

22

/DE

A10

21

ADDRESS[10]

10K

R121

5

G

SAH

6

ADDRESS[11]

27

A11

uP

D11

14

DATA[11]

20

/CE

A11

23

ADDRESS[11]

TESTCODE

*

74HC165

31

15

DATA[12]

14

2

/WE

D12

GND

27C64-90

A12

4

+15V

+5V

A/D EOC* ->

32

/DEN

D13

16

DATA[13]

TP1

9

/BIO

D14

17

DATA[14]

+5V

C59

POWER SUPPLY

X24pin7 (Fault Detect)

5

/INT

D15

18

DATA[15]

Vpp

Vcc

28

Reset Error Counter

Q12

V CC

16

D3

INT

DATA[8]

10

ADDRESS[0]

8

X32

9

2

X7

15

4

/RS

X1

7

D0

A0

Q6

Q11

R122

10K

HARD_RST

33

/MEN

X2

8

2

DATA[9]

12

D1

X6

A1

9

ADDRESS[1]

3

Q5

Q10

14

6

J13

R5

12

AC SYNC->

3

MC

CLKOUT

6

Y1

19.6608MHz

DATA[10]

13

D2

A2

8

ADDRESS[2]

RESET FREQUENCY

4

Q7

Q8

13

14

TMS320C10A

40

DATA[11]

15

D3

A3

7

ADDRESS[3]

60Hz

34 sec

5

Q4

Q9

12

10K

D4

X26

R6

50Hz

41 sec

13

D83

DATA[12]

16

6

ADDRESS[4]

6

Q3

R

10K

D82

CLKOUT (X10,15,37)

D4

A4

C64

C63

DATA[13]

17

5

ADDRESS[5]

7

10

4

DATA[14]

D5

A5

ADDRESS[6]

8

Q2

C

10p

10p

18

D6

A6

4

GND

Q1

9

X38

6

NC

-15V

CLKOUT*

74HC4040

(X2,21,36)

100V

100V

DATA[15]

19

D7

EPROM

A7

3

ADDRESS[7]

5

2

X34

26

NC

A8

25

ADDRESS[8]

9

DATA[0:15]

X20

8

9

27

24

ADDRESS[9]

10

/PGM

A9

HARD_RST

X38

8

NC

22

/DE

A10

21

ADDRESS[10]

10

13

20

/CE

A11

23

ADDRESS[11]

14

+5V

14

GND

27C64-90

A12

2

ADDRESS[0:11]

12

NC

12

X28

NC

+UNREG

J13

+5V

"MEMORY ENABLE"

13

X38

D1

VREF

TRIP POINT

+8.4V

AC SYNC

"50 or 60 Hz"->

X1

3

R2

10K

+8.8V

7805

IN

OUT

D2

S18104-2HS

R1

4.75K

2

3

4

NC

C42

C43

C44

C132

POWERFAIL* ->

"Voltage below trip point"->

X34

GND

D29

X26

R3

.33

2

150

4.7

50V

50V

35V

3

10K

D80

-UNREG

J13

9

X34

8

NC

2

C45

R141

D81

+5V

.33

R4

4.75K

P_GND

J13

50V

100K

D90

5

16

14

30

28

28

16

16

20

20

16

16

16

20

20

20

16

X34

10

NC

C100

C101

C108

C127

C128

C122

C111

C104

C110

C102

C103

C130

C114

C67

C115

C116

C113

X2

0.1

X3

0.1

X4

0.1

X5

0.1

X6

0.1

X7

0.1

X10

0.1

X11

0.1

X12

0.1

X13

0.1

X14

0.1

X15

0.1

X16

0.1

4.7

X17

0.1

X18

0.1

X19

0.1

50V

54HC08

50V

50V

50V

50V

50V

50V

50V

50V

50V

50V

50V

50V

35V

50V

50V

50V

13

X34

12

NC

54HC390

5320C10A

27C64-90

27C64-90

74HC4040

74HC4040

74HC373

74HC373

54HC259

54HC259

74HC165

TLC0820AI

54HC4351

54HC4351

54HC109

VREF

4.20V

8

7

10

14

14

8

8

10

10

8

8

8

10

10

10

8

VREF

J13

-15V

+15V

A475-1BB

7

+5V

+15V

J13

3

GENERAL INFORMATION

J13

14

16

16

14

16

14

14

14

16

20

16

14

14

20

14

20

LAST NO. USED

-15V

R-

162

4

C38

4

C26

7

C27

4

C28

4

C29

4

C31

C107

ELECTRICAL SYMBOLS PER E1537

X35

X39

X41

CAPACITORS =

MFD

.022/50V

UNLESS OTHERWISE SPECIFIED)

C-

132

R150

681

R56

681

150

4.7

0.1

0.1

0.1

0.1

0.1

C117

C123

C121

C120

C119

C131

C112

C125

C109

0.1

C124

C126

C118

C106

C129

C105

LABELS

D-

C3750V

35V

50V

50V

50V

50V

50V

X20

0.1

X21

0.1

X22

0.1

X23

0.1

X24

0.1

X30

0.1

X32

0.1

X34

0.1

0.1

X36

50V

X37

0.1

X38

0.1

0.1

X40

0.1

0.1

X42

0.1

RESISTORS = Ohms (

1/4W

UNLESS OTHERWISE SPECIFIED)

97

X26

X27

X28

X29

X31

54HC00

50V

74HC165

50V

74HC165

50V

54HC08

50V

54HC109

50V

54HC4066

50V

74HC04

50V

74AC04

50V

50V

74AC373

74AC138

50V

NAND

50V

54HC74

50V

74HC373

50V

54HC74

50V

74HC373

50V

DIODES =

1A, 400V

(UNLESS OTHERWISE SPECIFIED)

SUPPLY

VOLTAGE NET

R57

74AC139

LM224

OP27

33074A

33074A

33074A

C36

POWER SUPPLY SOURCE POINT

1.82K

7

8

8

7

8

7

7

7

8

10

8

7

7

10

7

10

2.43K

C32

C33

C34

C35

COMMON CONNECTION

+

0.1

R59

C39

C40

0.1

4

0.1

0.1

0.1

50V

FRAME CONNECTION

A

X33

8

150

4.7

50V

50V

50V

50V

C66

50V

35V

EARTH GROUND CONNECTION

TL431

REF

Reference

4.7

475

35V

-

6

Voltage

EQUIP.

R137

Adjust

N.A.

SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE

UNLESS OTHERWISE SPECIFIED TOLERANCE

THE LINCOLN ELECTRIC CO.

SQUARE WAVE 355

CW

500

TYPE

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

ON HOLES SIZES PER E-2056

5-8-92E

CLEVELAND, OHIO U.S.A.

CONTROL

SCHEMATIC

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

ON 2 PLACE DECIMALS IS + .O2

SUBJECT

NUMBER.

ON 3 PLACE DECIMALS IS + .OO2

6-11-93H

ON ALL ANGLES IS + .5 OF A DEGREE

SCALE

NONE

NO.SHT.

A 475

AUSTRALIA

CANADA

FRANCE

MATERIAL TOLERANCE ("t") TO AGREE

DR.

DB/MW

DATE

9/24/90

CHK.

SUP'S'D'G.

WITH PUBLISHED STANDARDS

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.