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G-4
ELECTRICAL DIAGRAMS
LN-9
METER BOARD (L6687) SCHEMATIC
(UNLESS OTHERWISE SPECIFIED)
EC
+5V
602
TP5
METER BOARD SCHEMATIC
21145
LN-9 & LN-9F (METRIC)
SUBJECT
S
SHT.
SUP'S'D'G.
COMMON CONNECTION
EQUIP.
TYPE
NO.
EARTH GROUND CONNECTION
POWER SUPPLY SOURCE POINT
FRAME CONNECTION
CHK.
9-24-93
CLEVELAND, OHIO U.S.A.
VOLTAGE NET
SUPPLY
SCALE
DATE
NONE
UNLESS OTHERWISE SPECIFIED)
(
RESISTORS = Ohms (
DIODES =
FM
THE LINCOLN ELECTRIC CO.
UNLESS OTHERWISE SPECIFIED)
CAPACITORS =
MFD
1/4W
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
.022/50V
1A, 400V
DR.
TP4562
510C
BD5
1
24
3
J14
8
J14
4
J14
10
D4
D5
OUT
IN
GND
X1
J14
7
D1
D3
B4
D2
4.7
35V
C2
500
50V
C1
J14
2
J14
5
J14
9
J14
1
B1
B3
FILE: S21145_1CA
10
C2
513
C1
C3
12
561
5
M/MIN
3
7
562
6
560
517 518 510
VOLTS
11
2
LO
HI
8
512 514
511
515
21145
S
SET
516
4
1
THE INTERCHANGEABILITY
N.A.
SHOW THE EXACT COMPONENTS
THIS DIAGRAM MAY NOT
ON ALL ANGLES IS + .5 OF A DEGREE
ON 3 PLACE DECIMALS IS + .OO2
CONTROLS HAVING A COMMON
WITH PUBLISHED STANDARDS
CODE NUMBER.
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON 2 PLACE DECIMALS IS + .O2
Ch'ge.Sht.No.
OR CIRCUITRY OF
WITHOUT AFFECTING
NOTES :
CIRCUIT BOARD
MAY CHANGE
SINCE COMPONENTS OR CIRCUITRY ON
BOARD.
OF A COMPLETE
A PRINTED
MATERIAL TOLERANCE ("t") TO AGREE
ON HOLES SIZES PER E-2056
TP4
7.68K
R6
1K
CW
R7
102K
R8
10K
CW
R9
B9B5
B6
C7
B8 B7
C4
B2
510A
510C
ACTUAL
518
2K
CW
R2
24.3K
R1
2.8K
R3
27
10V
C3
9
J14
6
510B
+5V
601
A
IN/MIN
J14
3
10 VAC
TO DIGITAL METER
LABELS
510
3-25-94
G-4
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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.