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G-6
ELECTRICAL DIAGRAMS
LN-9 GMA
Power PC Board Schematic
32A
4
504
7
R1
532
M
541
REV
DIRECTION
S7
SWITCH
D3
531
7A
5
541B
531
539B
32A
32A
D2
HOT
HOT-COLD
2A
524A
500
620
530
620
621
HOT
INTERLOCK
S2A
9
11
31
3
J1
1
X2
5
6
5W
10V
DZ2
14
7
/Q2
D1
VDD
Q1
SET 2
CLOCK 2
/Q1
Q2
CLOCK 1
VSS
RESET 1
MC14013B
SET 1
D2
RESET 2
X1
11
10
1
8
12
2
13
6
4
9
5
3
D7
C14
510
500
J1
15
D6
150
50V
C7
J2
5
D5
B527
J1
6
2N5655
Q1
5W
15V
DZ1
J2
8
D8
332
R1
22.1K
R8
X2
11
10
526
1N4936
D9
200V
.15
C6
C8
D4
525
510
500
500
X2
13
12
628
X2
3
4
X2
9 8
X2
1
2
22.1K
R10
B526
J1
12
HOT COLD
S2B
628
INTERLOCK
ON
INTERLOCK
TRIGGER
SWITCH
OFF
527
26 VAC
602
9.6 VAC
TRIGGER SWITCH
623
622
T1
601
510
525
+15V
X2
14
7
J1
9
100V
1A
Q5
D17
200V
.15
C17
100
R13
D19
1.00K
R14
C18
1N4936
D16
4.75K
R15
1W
16V
DZ3
C15
J1
8
1.00K
R5
100K
R7
C10
4.7
35V
C11
10K
R6
2N5655
Q2
C9
D14
1W
27V
DZ4
500
500mA
300V
Q3
530B
MC14013B
X1
7
14
C20
24Vdc
CR1
10
11
J1
11
1N4936
D20
J1
13
2.21K
R3
D10
J2
9
15.0K
R4
J1
14
1N4936
D12
10.0
R2
D11
510
500
D13
(W)
FWD
(B)
115 VAC
32A
12
T2
24 VAC
SWITCH
8871
L
32
RHEOSTAT PLUG
GAS
31
4
2
OTHERWISE NOTED.
SOLENOID
COLD
7A
7
COMPONENTS IN THE DASHED AREAS ARE NOT ON THE P.C. BOARD UNLESS
TO CONTROL
532
622
621
623
B532
115 VAC
100V
.047
C2
2
B541B
6
B32A1
J2
3
2N6397
SCR1
B7
J1
4
J2
6
B32A2
100V
.047
C3
0.4A
125V
F1
16A
400V
D1
4
1
1400V
.0047
C1
1400V
.0047
C5
2N6397
SCR2
CR1
7
4
CR1
9
3
16A
400V
4
3
0.2mH
PT1
1
2
CR1
9
6
0.2mH
PT1
3
4
B539B
1400V
.0047
C4
16A
400V
4
2
150V
45J
TP1
J1
3
CR1
8
5
J1
2
500
628
7
10
CONTACT ARE LOCATED ON THE P.C. BOARD.
TWO CONNECTOR PINS AND THE RELAY
524
B7A
REED
SWITCH
530
500
530A
524
BOARD
TRIGGER
524A
521
CR2
628
SUPPLY
C-
SUPÕSÕDÕG.
LN-9 GMA AND LN-9F
EARTH GROUND CONNECTION
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
L
SHT.
20
NO.
VOLTAGE NET
D-
LAST NO. USED
LABELS
15
8871
R-
POWER P.C. BOARD SCHEMATIC
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
FRAME CONNECTION
COMMON CONNECTION
POWER SUPPLY SOURCE POINT
20
DR.
EQUIP.
TYPE
SUBJECT
(UNLESS OTHERWISE SPECIFIED)
CHK.
THE LINCOLN ELECTRIC CO.
ELECTRICAL SYMBOLS PER E1537
1A, 400V
RESISTORS = Ohms (
CAPACITORS =
MFD
CLEVELAND, OHIO U.S.A.
NONE
DATE
NUMBER.
(
GENERAL INFORMATION
SCALE
1/4W
.022/50V
NOTES :
DIODES =
UNLESS OTHERWISE SPECIFIED)
UNLESS OTHERWISE SPECIFIED)
ON HOLES SIZES PER E-2056
ON 3 PLACE DECIMALS IS + .OO2
FILE: L8871_3E1
529
540
MATERIAL TOLERANCE ("t") TO AGREE
ON ALL ANGLES IS + .5 OF A DEGREE
WITH PUBLISHED STANDARDS
CURRENT
WELD
ChÕge.Sht.No.
ON 2 PLACE DECIMALS IS + .O2
UNLESS OTHERWISE SPECIFIED TOLERANCE
J2
7
J2
1
0.2mH
PT1
5
6
200V
.01
C12
J1
10
J1
7
RT/
12-20-93
JJ
1-21-94H
8-5-94E
8-2-96A
3-7-97B
G-6
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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.