Trigger Pc Board Schematic - Lincoln Electric SVM138-A Service Manual

G-7

Trigger PC Board Schematic

+ 2 0 V
3
X1
L M 2 9 0 1
12
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.
ELECTRICAL DIAGRAMS
+ 2 0 V
R1
3 3 2
D1 D 2
1A 1A
6 0 0 V 6 0 0 V
TRIGGER
S W I T C H
6 2 0
C1
5 0
2 5 V
2 4 V A C
DZ1
2 0 V
1W
621
D 3 D 4
1A 1A
6 0 0 V 6 0 0 V
C 2
2.7
5 0 V
NOTES :
C 4
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
NUMBER.
T H I S S H E E T C O N T A I N S P R O P R I E T A R Y I N F O R M A T I O N O W N E D B Y
A N D I S N O T T O B E R E P R O D U C E D , D I S C L O S E D O R U S E D W I T H O U T T H E E X P R E S S P E R M I S S I O N O F
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
6 2 3
D 5
1A
6 0 0 V
R 7
56.2K
6 2 2
5
2
X1
4
R 4
10.0K
7
1
X1
6
11
13
X1
R 9
10
2.80K
C 3
1.0
3 5 V
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
CAPACITORS =
RESISTORS = Ohms (
DIODES =
FILENAME: M17950_1AA
THE LINCOLN ELECTRIC CO.
THE LINCOLN ELECTRIC CO.
ChÕge.Sht.No.
THE LINCOLN ELECTRIC CO.
10-6-95B
CLEVELAND, OHIO U.S.A.
LM
DR.
OCI1
1 4
D Z 2
7 5 V
1W
2 3
9
14
X1
8
L A S T N O . U S E D
R - 15
C - 4
MFD ( .022/50V UNLESS OTHERWISE SPECIFIED)
LABELS
D - 5
1/4W UNLESS OTHERWISE SPECIFIED)
1A, 400V (UNLESS OTHERWISE SPECIFIED)
SUPPLY VOLTAGE NET
POWER SUPPLY SOURCE POINT
COMMON CONNECTION
FRAME CONNECTION
EARTH GROUND CONNECTION
EQUIP.
LN-9 GMA & LN-9F GMA
T Y P E
TRIGGER PCB SCHEMATIC
S U B J E C T
NONE
S C A L E
5/15/95
D A T E CHK. SUPÕSÕDÕG.
G-7
5 3 0
5 0 0
X- 1
OCI- 1
D Z - 2
SHT.
M M
17950
NO.
LN-9 GMA