Y P a D | Lincoln Electric SVM100-A specs

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ELECTRICAL DIAGRAMS

G-12

CONTROL BOARD SCHEMATIC — SQUARE WAVE TIG 255 (cont’d) (G2150)

I O + 5 V

N + 5 V

R 1 0 6

J 4

R 1 0 2

2 6 7

J 6

4 7 5

M T 2

J 2

O C I 8

T R I 1

1 0 K

C O L 1

M T 1

1 . 5 0 K

R421

R921

R721

37R

4 7 5

D 3 7

D 2 0

27R

75R

K001.

321R

K001.

K E Y P A D

J 2

6 0 0 m A

R 1 2 2

Q 1 3

J 2

R O W 1

C O L 2

4 0 V

1 0 K

R 2 2 7

Q 1 4

1 . 0 0 K

A C / D C

J 2

J 4

R O W 2

J 2

I O G N D

C 3 4

6 0 0 m A

R 1 2 5

M I C R O S W I T C H

O C I 1

J 2

C O L 3

R O W 3

4 0 V

1 0 K

1 K

C N Y 1 7 - 3

J 2

Q 8

R 1 0 7

R O W 4

J 2

R 1 0 3

H I G H

J 2

6 0 0 m A

R 1 2 8

2 6 7

R O W 5

C O L 4

C 3 5

4 0 V

1 0 K

4 7 5

M T 2

F R E Q

O C I 9

T R I 2

1 8

C 2 1

Q 1 1

D 1 9

D 1 8

1 5 V

K574

1 5 0 p

0R32

K276.

1R23

K726.

2R32

K276.

3R32

K276.

43R2

K276.

6 0 0 m A

R 1 7 2

M T 1

1 1 5 V

57R

4 7 5

34R

5 0 V

L + 5 V

4 0 V

1 0 K

J 4

J 8

I O + 5 V

R 2 2 8

C 8 2

C 8 3

C 8 4

C 8 5

C 8 6

1 . 0 0 K

2 4 V A C

I O G N D

1 0 0 p

I O G N D

1 0 0 V

J 4

( 1 o f 5 X F M R

N G N D

I O G N D

R 1 0 8

J 8

28R

4 7 5

58R

R178

K01

4 7 5

M T 2

s e c o n d a r y

D 3 8

D 4 0

1 . 5 0 K

R 1 0 4

2 6 7

W A T E R

w i n d i n g s )

G A S

C R Y S T A L

L + 5 V

O C I 1 0

T R I 3

1 1

J 6

84R

K57 .4

231 R

K57 .4

9R7 K4.75

D 0 - D 7

M T 1

1 1 5 V

C 2 5

O C I 2

X 3 2

C 2 2

R E S E T

1 K

8 . 0 M H z

2 2 p

R 2 2 9

J 4

C N Y 1 7 - 3

1R7

1 0 0 V

1 K

J 6

Y 1

1 3 0

1 . 0 0 M

1 . 0 0 K

1 0

C 1 6

C 3 2

A / D

D 0

Q 0

1 9

I O G N D

7 4 H C 5 7 3

A R C S T A R T

4 7 5

D 3 9

D 3 4

C 1 9

2 2 p

I N

18R

K574.

1 7

1 5 V

1 0 0 V

R E F

D 1

Q 1

1 8

S W I T C H

J 6

0R7

K574

1 5 0 p

C 2 3

C 3 3

R E S

01R2

K574.

D 2

X 2 1

Q 2

1 6

D 7 5

5 0 V

0 . 1

X 1 9

D 3

Q 3

L G N D

1 . 0

5 0 V

G N D

C 2 0

D 4

Q 4

1 5

P I E Z O

C 5

3 5 V

D 5

Q 5

1 4

J 6

V s s

V R H

5 2

1 3

+ 1 5 V

7 E X T A L

V R L

5 1

L G N D

D 6

Q 6

1 3

B U Z Z E R

N + 5 V

1 2

8 X T A L

R E S E T

1 7

D 7

Q 7

L 2

J 3

+ 1 5 V

L A T C H O U T P U T E N A B L E

V B

L E D ( - )

+ 1 5 V

I O G N D

M O D B

P C 5

1 4

2 . 2 1 K

Q 1 0

. 3 9 m H

1 8

1 1

M I S C . L A T C H E N A B L E

1 1

L E

X I R Q

P C 2

R 1 0 1

6 0 0 m A

D 7 4

D 8 0

R041

1 . 0 0 K

1 9

I R Q

X 3

P C 0

D I S P L A Y L A T C H E N A B L E

O E

4 0 V

1 5 0

5 W

R O W 4

2 3

4 4 N O T U S E D

222R

K001

J 3

R O W 5 2 4 P D 4

P C 1

1 0 L E D L A T C H E N A B L E

L C D + 5 V

L 3

R 2 3 5

J 6

P T C 2

R O W 3

2 2

P D 3

P E 4

4 6 N O T U S E D

I O G N D

. 3 9 m H

R 1 6 4

L E D ( + )

P D 2

P E 5

N G N D

1 5 0

5 W

+ t

D 7 9

D 7 8

R O W 2

2 1

4 8 N O T U S E D

L 1

I O G N D

D 8 1

P D 1

P E 6

5 6

77 1 . 0 0 K

R O W 1

2 0

P D 0

O C 4

3 0 N O T U S E D

A C / D C M I C R O S W I T C H

M O D A 3 N O T U S E D

. 3 3 m H

2 7 P A 7

R E M O T E

N G N D

A R C S T A R T S W I T C H

2 5 P D 5

S T R A / A S

4 N O T U S E D

K233.

6R41

K233.

7R41

K233.

84R1

K233.

9R41

K233.

0R51

K233.

R151

K233.

2R51

K233.

3R51

P O T

R E M O T E C U R R E N T

4 7

P E 2

E C L O C K

5 N O T U S E D

C O N T R O L

1 0 K

N G N D

L O W C U R R E N T F E E D B A C K

4 5

P E 1

S T R B / R / W

6 N O T U S E D

J 6

H I G H C U R R E N T F E E D B A C K

4 3 P E 0

P C 3

1 2 N O T U S E D

D 0

Q 0

1 9

1 0 0

R 1 5 4

J 3

D 0

R 5 3

R 6 6

V O L T A G E F E E D B A C K

7 4 H C 5 7 3

1 0 0

R E M C U R

4 9

P E 3

P C 4

1 3 N O T U S E D

D 1

Q 1

1 8

R 1 5 5

J 3

D 1

4 . 7 5 K

R 4 1

1 0

L C D

1 . 0 0 M

X 1 4

Z E R O C R O S S

3 2

I C 1

O C 5

3 1 N O T U S E D

D 2

X 2 2

Q 2

1 7

1 0 0

R 1 5 6

J 3

D 2

C 7 1

1 . 0 0 K

K547.

K574.

K547.

K57.4

1 1

3 5 V

4R5

1 2 V

O C 3

P B O

D 0 - D 7

D 3

Q 3

R 1 5 7

1 2

D 3

D I S P L A Y

1 . 0

D Z 1 3

S C R 2 , 4

2 9

4 2

D 0

D 3

1 6

1 0 0

J 3

C 7 2

J 6

P T C 1

1 W

0 . 1

X 3 1

S C R 1 , 3

2 8

O C 2

P B 1

4 1

D 1

D 4

Q 4

1 5

1 0 0

R 1 5 8

J 3

D 4

5 0 V

202

302

402

502

602

702

802

102

812

712

1 3

D I S P L A Y E

612

1 0 0

J 3

1 6

P C 7

P B 2

4 0

D 2

D 5

Q 5

1 4

R 1 5 9

1 4

D 5

5 6

I O G N D

D I S P L A Y R S

1 5

3 9

D 3

D 6

Q 6

1 3

1 0 0

R 1 6 0

J 3

D 6

P C 6

P B 3

1 5

1 0 0

J 3

N G N D

N O T U S E D

5 0

P E 7

P B 4

3 8

D 4

D 7

Q 7

1 2

R 1 0 9

1 6

D 7

N O T U S E D

3 3

P A 1

P B 5

3 7

D 5

1 0 0 p

R 1 3 8

N O T U S E D 3 4 P A 0

P B 6

3 6

D 6

L G N D

1 1

L E

C 5 1

C 5 2

C 5 3

C 5 4

C 5 5

C 5 6

C 5 7

C 5 8

L O _ C U R _ F B

2 6

V d d

M C 6 8 H C 1 1

P B 7

3 5

D 7

O E

L C D C O N T R A S T T E M P E R A T U R E C O M P E N S A T I O N C I R C U I T

1 0 0 V

2 6 . 7

J 3

X 1 1

R 1 4 4

V S S

D 0 - D 7

- 1 5 V

R 8 8

R 1 3 9

1 . 0 0 K

R 3 4

C 7 5

L G N D

3 . 3 2 K

2 6 . 7

2 . 6 7 K

J 3

C 7 3

0 . 1

X 3 1

L C D G N D

R / W

3 3 . 2 K

14R1

R 1 4 3

5 0 V

J 1

R 3 3

N + 5 V

I O G N D

K574.

K547.

K574.

D 1

7 4 H C 5 7 3

Q 1

1 9

D14

X 1 4

T P 1

T P 3

J 3

3 . 3 2 K

1 8

3 0 1

D 0

Q 0

C 7 4

J 1

R 9 7

V o

51R2

90R2

31R2

D 2

X 2 0

Q 2

1 7

4 . 7 5 K

1 6

J 1

D 3

Q 3

N G N D

D 4

Q 4

1 5

J 1

L C D + 5 V

L C D G N D

R 1 3 0

1 4

J 3

2 2 1 K

D 5

Q 5

4 . 7 5 K

X 1 4

V D D

1 0 K

T P 2

D 0 - D 7

D 6

Q 6

1 3

R 1 3 1

1 0

3 0 V

C 6 2

D 7

Q 7

1 2

4 . 7 5 K

1 . 0 A

D 4 2

0 . 1

L G N D

J 1

1 3 3 K

J 7

1 0

R 9 1

L C D G N D

5 0 V

R 5 2

H I _ C U R _ F B

1 . 0 0 K

R 7

1 1

L E

1 5 0

R 6 8

J 1

X 1 1

O E

R 9 2

C W

1 . 0 0 K

6R5

1 . 0 0 K

1 0 K

7R32

1 3

L C D C O N T R A S T C I R C U I T

L C D G N D

C 7 8

1 . 0 0 K

R 2 3 6

1 4

J 7

0 . 1

X 3 1

R 9 3

J 1

M T

1 0 0 K

X 1 4

R 5 1

R 5 0

5 0 V

1 2

S H U N T

1 5 0

2 . 2 1 K

1 . 0 0 K

J 1

L C D G N D

R 9 4

4 0 0 A / 2 0 0 m V

N G N D

C 7 6

C 7 7

I O G N D

1 . 0 0 K

L C D G N D

1 0 0

J 3

R 1 6 2

R S

R 1 6 6

N G N D

1 0 0

3 . 3 2 K

J 3

A C

R 1 6 3

SORS

EFE D

1 0 0 p

R 1 6 7

3 . 3 2 K

TLOVA G E

REZO C

SCR2,4

SCR1,3

C 5 9

C 6 0

1 0 0 V

T O A 4 8 2 . 1

L E G E N D

L C D G N D

( G R O U N D A N D + 5 V N E T S )

I O G N D

P R O C E S S O R I O C O M M O N

	L G N D	L O G I C C O M M O N
	N G N D	N O I S Y C O M M O N		G E N E R A L I N F O R M A T I O N
	L C D G N D	D I S P L A Y C O M M O N
	X 3 1 G N D	X 3 1 C O M M O N		C A P A C I T O R S = M F D ( . 0 2 2 / 5 0 V U N L E S S O T H E R W I S E S P E C I F I E D )
	X 3 1 G N D	X 3 1 C O M M O N		R E S I S T O R S = O h m s (	1 / 4 W U N L E S S O T H E R W I S E S P E C I F I E D )
	X 3 2 G N D	X 3 2 C O M M O N		D I O D E S = 1 A , 4 0 0 V	( U N L E S S O T H E R W I S E S P E C I F I E D )
	X 3 2 G N D	X 3 2 C O M M O N
			S Q U A R E W A V E T I G 2 5 5 C O N T R O L B O A R D
NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting. PC Board	I O + 5 V	P R O C E S S O R I O + 5 V S U P P L Y
	L + 5 V	L O G I C + 5 V S U P P L Y
repairs will invalidate your factory warranty. This Printed Circuit Board schematic is provided for reference only. It may not	N + 5 V	N O I S Y + 5 V S U P P L Y	A 4 8 2 . 2		0 1 / 0 3 / 9 4
	N + 5 V	N O I S Y + 5 V S U P P L Y			0 1 / 0 3 / 9 4
be totally applicable to your machine's specific PC board version. This diagram is intended to provide general information	L C D + 5 V	D I S P L A Y + 5 V S U P P L Y				A
	X 3 1 _ + 5 V	X 3 1 + 5 V S U P P L Y
regarding PC board function. Lincoln Electric discourages board level troubleshooting and repair since it may compromise	X 3 2 _ + 5 V	X 3 2 + 5 V S U P P L Y

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.

Lincoln Electric SVM100-A Control Board Schematic Square Wave TIG 255 cont’d G2150, Y P a D

Models: SVM100-A

ELECTRICAL DIAGRAMS

CONTROL BOARD SCHEMATIC — SQUARE WAVE TIG 255 (cont’d) (G2150)

K E Y P A D

R E S E T

B U Z Z E R

X I R Q

R E M O T E

N G N D

C O N T R O L

N G N D

D I S P L A Y

G E N E R A L I N F O R M A T I O N

A 4 8 2 . 2

SQUARE WAVE TIG 255