Lincoln Electric SVM129-B service manual Schematic Current Sense PC Board All Codes S21410, 01412

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G-26	ELECTRICAL DIAGRAMS	G-26
Schematic - Current Sense PC Board - All Codes - (S21410)

01412

S

+15V

681K

EXCITATION CURRENT

MIN OFF SET

R11

SOURCE

ADJUSTMENT

K0

100A/V

CURRENT OUT

0.1

3R

CURRENT CAL

R10

6

X1

J18

13.7K

1

3.8V = 38 mA

1014

7

100

R9

5

5

CW

R

13.7K

VREF

K2 2R

3

6R1 K.001

X1

1

R4

Q1

R8 681K

3A

1.6V = 16 mA

2

1014

1.00K

100V

6

20K

R

K05 .1

1R

C1

CW

C2

+IC

150p

4

50V

-VH

7R

6.81K

3

10

HALL EFFECT

+VH

2

+15V

X1

8

SENSOR

1014

9

X2

-IC

1

J18

10.0

R15

41

2

1.50K

4

12

1

R

X3

8

C4

2R1

100

C3

C5

X1

14

X1

1014

TL431

REF

0.1

50

13

50V

50V

6

J18

LT1014

31

2.94K

3

R

J18

11

J18

1

2

4

3

4

THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY

THE LINCOLN ELECTRIC CO.

AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS PERMISSION OF

THE LINCOLN ELECTRIC CO.

NOTES :

GENERAL INFORMATION

LABELS

FILE:

S21410_1BA

N.A.

SINCE COMPONENTS OR CIRCUITRY ON

A PRINTED

ELECTRICAL SYMBOLS PER E1537

CIRCUIT BOARD

MAY CHANGE

WITHOUT AFFECTING

SUPPLY

VOLTAGE NET

FRAME CONNECTION

THE INTERCHANGEABILITY

OF A COMPLETE

BOARD.

CAPACITORS =

MFD ( .022/50V

UNLESS OTHERWISE SPECIFIED)

POWER SUPPLY SOURCE POINT

THIS DIAGRAM MAY NOT

SHOW THE EXACT COMPONENTS

RESISTORS = Ohms (

1/4W

UNLESS OTHERWISE SPECIFIED)

EARTH GROUND CONNECTION

OR CIRCUITRY OF

CONTROLS HAVING A COMMON

CODE NUMBER.

DIODES =

1A, 400V

(UNLESS OTHERWISE SPECIFIED)

COMMON CONNECTION

UNLESS OTHERWISE SPECIFIED TOLERANCE

Ch'ge.Sht.No.

THE LINCOLN ELECTRIC CO.

EQUIP.

STT-CURRENT SENSE

TYPE

ON HOLES SIZES PER E-2056

5-19-95

CLEVELAND, OHIO U.S.A.

SCHEMATIC

ON 2 PLACE DECIMALS IS + .O2

9-27-96F

SUBJECT

ON 3 PLACE DECIMALS IS + .OO2

SCALE

NONE

ON ALL ANGLES IS + .5 OF A DEGREE

11-15-96E

SHT.

MATERIAL TOLERANCE ("t") TO AGREE

DR.

MLD

03/21/94

FV

S 21410

DATE

CHK.

SUP'S'D'G.

NO.

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	INVERTEC STT & STT II
	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.