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G-9
ELECTRICAL DIAGRAMS
LN-9 GMA
Meter Board Schematic
1
510
561
2
8
4
510C
B8
510B
C7
518517
562
TP5
3
A CE
519
560
WITHOUT AFFECTING
CIRCUIT BOARD
THIS DIAGRAM MAY NOT
SHOW THE EXACT COMPONENTS
RESISTORS = Ohms (
THE INTERCHANGEABILITY
(
CAPACITORS =
MFD
ELECTRICAL SYMBOLS PER E1537
UNLESS OTHERWISE SPECIFIED)
(UNLESS OTHERWISE SPECIFIED)
GENERAL INFORMATION
1/4W
FM
CLEVELAND, OHIO U.S.A.
NOTES :
N.A.
ON HOLES SIZES PER E-2056
MATERIAL TOLERANCE ("t") TO AGREE
NO.
D4
2.8K
R3
SUBJECT
TYPE
EQUIP.
COMMON CONNECTION
LN-9H & LN-9FH (METRIC)
CHK.
METER BOARD SCHEMATIC
NONE
DATE
TP4
A PRINTED
OF A COMPLETE
BOARD.
SINCE COMPONENTS OR CIRCUITRY ON
MAY CHANGE
ON ALL ANGLES IS + .5 OF A DEGREE
ON 3 PLACE DECIMALS IS + .OO2
CONTROLS HAVING A COMMON
WITH PUBLISHED STANDARDS
DIODES =
THE LINCOLN ELECTRIC CO.
CODE NUMBER.
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON 2 PLACE DECIMALS IS + .O2
21146
EARTH GROUND CONNECTION
POWER SUPPLY SOURCE POINT
FRAME CONNECTION
SUPPLY
.022/50V
VOLTAGE NET
UNLESS OTHERWISE SPECIFIED)
LABELS
OR CIRCUITRY OF
1A, 400V
ChÕge.Sht.No.
SUPÕSÕDÕG.
DR.
SHT.
S
SCALE
9-24-93
27
10V
C3
FILE: S21146_1CB
J14
10
J14
7
J14
2
B4
D3
D1
D2
OUT
IN
GND
X1
4.7
35V
C2
601
5DB
602
ACTUAL
516
SET
3
9
21146
512 515514
511
C2
510
513
C1
S
10 VAC
C3
12
M/MIN
5
VOLTS
IN/MIN
TO DIGITAL METER
TP4
510A
7
HI
4
11
6
LO
10
2
1
510C
518
562
+5V +5V
J14
5
J14
8
J14
1
J14
9
B1
D5
500
50V
C1
J14
6
B11
J14
3
J14
4
B9B5B7 B2
B3
B6
5K
CW
R9
500
CW
R7
C6
61.9K
R8
2K
CW
R5
C5
24.3K
R1
2K
CW
R2
3.74K
R6
C4
13.7K
R4
3-25-94
G-9
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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.