Current Sense Board (M17591) Schematic - Lincoln Electric INVERTEC STT Series Service Manual

G-16

Current Sense Board (M17591) Schematic

CURRENT CAL
3.8V = 38 mA
C W
1.6V = 16 mA
1.50K
1
X3
8
REF
TL431
6
2.94K
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY
NOTES :
N.A. SINCE COMPONENTS OR CIRCUITRY ON
CIRCUIT BOARD MAY CHANGE
THE INTERCHANGEABILITY
THIS DIAGRAM MAY NOT
OR CIRCUITRY OF
U N L E S S O T H E R W I S E S P E C I F I E D T O L E R A N C E
O N H O L E S S I Z E S P E R E - 2 0 5 6
ON 2 PLACE DECIMALS IS + .O2
ON 3 PLACE DECIMALS IS + .OO2
O N A L L A N G L E S I S + . 5 O F A D E G R E E
MATERIAL TOLERANCE ("t") TO AGREE
W I T H P U B L I S H E D S T A N D A R D S
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.
+15V
EXCITATION CURRENT
SOURCE
VREF
3
X1
1
R4
1014
2
1.00K
C1
C2
+IC
150p
4
50V
-VH
3
+VH
H A L L E F F E C T
2
S E N S O R
-IC
X2 1
C4
0.1
50V
THE LINCOLN ELECTRIC CO.
G E N E R A L I N F O R M A T I O N
A PRINTED
ELECTRICAL SYMBOLS PER E1537
WITHOUT AFFECTING
CAPACITORS =
OF A COMPLETE BOARD.
SHOW THE EXACT COMPONENTS RESISTORS = Ohms (
CONTROLS HAVING A COMMON CODE NUMBER.
DIODES = 1A, 400V
Ch'ge.Sht.No.
5-19-95
9-27-96F
11-15-96E
ELECTRICAL DIAGRAMS
MIN OFF SET
ADJUSTMENT
100
Q1
3A
100V
20K
C W
6.81K
+15V
10.0
J18
R15
2
C3
50
50V
J18
3
J18
4
AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS PERMISSION OF
MFD ( .022/50V
UNLESS OTHERWISE SPECIFIED)
1/4W UNLESS OTHERWISE SPECIFIED)
(UNLESS OTHERWISE SPECIFIED)
THE LINCOLN ELECTRIC CO.
CLEVELAND, OHIO U.S.A.
NONE
SCALE
M L D 03/21/94
DR. DATE
681K
R11
100A/V CURRENT OUT
R10
6 J18
X1
13.7K
1
7
1014
R9
5
13.7K
681K
10
X1
1014
9
4
12
X1
C5
X1 1014
13
LT1014
J18
11
1 2
3 4
THE LINCOLN ELECTRIC CO.
FILE: S21410_1BA
L A B E L S
FRAME CONNECTION
SUPPLY VOLTAGE NET
POWER SUPPLY SOURCE POINT
EARTH GROUND CONNECTION
COMMON CONNECTION
EQUIP.
STT-CURRENT SENSE
TYPE
SCHEMATIC
S U B J E C T
SHT.
F V S
21410
CHK. SUP'S'D'G. NO.
G-16
8
14
INVERTEC STT