Filter
Top Products
G-5
ELECTRICAL DIAGRAMS
LN-9 GMA
Voltage Board Schematic
5.62K
R42
525
500
524
510
510
514
525
510
56.2K
R21
D10
15.0K
R20
521A
100K
R19
530
D11
530
500
332K
R22
22.1K
R23
(+15V)
522
524
510
TO R107
SHUTDOWN
X2
7
6
5
D9
J2
1
J2
2
500
J2
3
TO 5J2
HOT COLD
J2
6
INTERLOCK
S2b
CR1
3
1
SWITCH
521
26.7K
R30
(-10V)
BYPASS TABS
4.7
35V
C12
514
PANEL PLUG
B
TO METER
TO POWER BOARD
R3
(SHOWN WITH JUMPER PLUG
P.C. BOARDS DO NOT HAVE THE
4 PIN RECEPTACLE AND 521A IS 521.
L
8388
510
FOR OPTIONAL PULSED POWER
FILTER P.C. BOARD PLUG
INSTALLED). EARLIER VOLTAGE
VOLTAGE P.C. BOARD RECEPTACLE
636
CONTROL
"VOLTS"
(+10V)
634
635
510B
TO METER
PANEL PLUG
5.62K
R14
J1
2
J3
1
J1
3
J1
12
J1
10
J1
9
X1
8
10
9
267
R18
1.8
20V
C10
1.82K
R15
J1
6
2.21K
R8
510
510B
500525
521
C16
13.7K
R32
D2
510B
525
510B
667
510
520
521A
667
D4
X1
1
3
2
X1
14
12
13
BOARD
C
D
520
J3
2
J3
3
J3
4
500mW
5.1V
DZ3
13.7K
R50
J1
8
1400V
.0047
C2
4.75K
R3
33.2K
R37
13.7K
R39
D16
26.7K
R5
C6
D1
150V
45J
TP1
CW
500
R2
44.2K
R1
0.125A
250V
F1
J1
7
S
D
2N4857
Q2
1
3
2
D3
TO CONTROL
13.7K
R49
100V
.1
C1
J1
11
.47
50V
C5
J1
5
D8
.47
50V
C17
1.00K
R17
D7
100K
R16
D5
C
525
D17
C7
510
681K
R45
BLUE
X1
7
5
6
15.0K
R6
39
20V
C18
50V
4
C4
1.00M
R9
C19
4.75K
R10
10K
R7
267
R36
D
START
515
510B
510
510
B
A
525
510B
500
ELECTRICAL SYMBOLS PER E1537
UNLESS OTHERWISE SPECIFIED)
CAPACITORS =
2K
CW
R41
2
1
3
39
20V
C8
PIN B
PIN A
1.00K
R35
X2
1
3
2
100K
R4
X2
14
13
12
D6
A
100K
R11
22.1K
R26
D14
530
525
5K
CW
R40
2
3
1
C9
J1
4
B7
2.21K
R29
B8
100K
R31
300V
500mA
Q3
D12
J2
4
J2
12
C14
27
35V
C13
534
R4
G.L.P. RESET
R5
500
S4
TO 5J1
NOTES :
533
(-10V)
500
C
GND
(-10V)
525
TO POWER BOARD
(+15V)
USED ON LN-9
BELOW CODE 9131
500
CR4
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
C
(+15V)
A
56.2K
R38
J2
11
681K
R46
22.1K
R28
X2
9
8
10
J2
5
1.0
35V
C15
1W
15V
DZ2
D15
CR1
3
2
4.75K
R24
D13
D18
50
DATE
DR.
18
LAST NO. USED
D-
LABELS
(+15V)
8388
CLEVELAND, OHIO U.S.A.
CHK.
THE LINCOLN ELECTRIC CO.
SUBJECT
TYPE
1A, 400V
RESISTORS = Ohms (
UNLESS OTHERWISE SPECIFIED)
1/4W
NONE
SCALE
EARTH GROUND CONNECTION
L
SHT.
7/11/96
(UNLESS OTHERWISE SPECIFIED)
DIODES =
LN9, LN9F, LN9GMA, LN9FGMA
COMMON CONNECTION
FRAME CONNECTION
VOLTAGE NET
SUPPLY
POWER SUPPLY SOURCE POINT
NO.
SUPÕSÕDÕG.
EQUIP.
22
R-
C-
.022/50V
(
MFD
GENERAL INFORMATION
FILENAME: L8388_4RB
PANEL PLUG
515
TO METER
B
PIN S
WHITE
PIN F
A
(+15V)
510B
POLARITY
SWITCH
S3
510B
POS
NEG
67
21
667
B
1.00M
R43
J1
1
47.5
R34
4N26
OCI1
42
1
6
5
5.11K
R33
MATERIAL TOLERANCE ("t") TO AGREE
ON 3 PLACE DECIMALS IS + .OO2
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
9131 AND LN-9F
LN-9 ABOVE CODE
NUMBER.
WITH PUBLISHED STANDARDS
ON ALL ANGLES IS + .5 OF A DEGREE
ChÕge.Sht.No.
ON 2 PLACE DECIMALS IS + .O2
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON HOLES SIZES PER E-2056
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
47.5
R48
30V
200mA
Q1
1W
20V
DZ1
J2
10
1.00M
R13
GAIN
24Vdc
CR1
4
5
22.1K
R27
1.00K
R12
4.75K
R25
5.11K
R47
J2
7
1.00M
R44
4.7
35V
C3
C22
LM224
X2
4
11
LM224
X1
4
11
C20
C11
C21
TJP/
VOLTAGE BOARD SCHEMATIC
8-2-96B
G-5
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
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.