Lincoln Electric LN-9 SVM127-A Service Manual page 133

G-4
METER BOARD (L6687) SCHEMATIC
C3
9
10
11
561 560
B8 B7
102K
C7
C W
10K
NOTES :
N.A. SINCE COMPONENTS OR CIRCUITRY ON
CIRCUIT BOARD
THE INTERCHANGEABILITY
THIS DIAGRAM MAY NOT
OR CIRCUITRY OF
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON HOLES SIZES PER E-2056
ON 2 PLACE DECIMALS IS + .O2
ON 3 PLACE DECIMALS IS + .OO2
ON ALL ANGLES IS + .5 OF A DEGREE
MATERIAL TOLERANCE ("t") TO AGREE
WITH PUBLISHED STANDARDS
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
511 512 514 515
SET ACTUAL
513
516
C2
C1
8
5
12 1 4
HI IN/MIN
M/MIN
2 3 6
LO 7 VOLTS
517 518 562 510 510C
B5 B6 B9 B2 B3
24.3K
7.68K
C4
C W
C W
1K
2K
2.8K
TP4
GENERAL INFORMATION
A PRINTED
ELECTRICAL SYMBOLS PER E1537
MAY CHANGE WITHOUT AFFECTING
CAPACITORS =
OF A COMPLETE BOARD.
RESISTORS = Ohms (
SHOW THE EXACT COMPONENTS
CONTROLS HAVING A COMMON CODE NUMBER.
DIODES = 1A, 400V
Ch'ge.Sht.No.
3 - 2 5 - 9 4
510A 510B
TO DIGITAL METER
518 562 TP4 510C 510 +5V +5V
A 3 4 E C 2 1
6 3 4 10 8 2 1
J14 J14 J14 J14 J14 J14
TP5
C2
4.7
35V
C3
27
10V
LABELS
SUPPLY
M F D ( .022/50V
UNLESS OTHERWISE SPECIFIED)
POWER SUPPLY SOURCE POINT
1/4W UNLESS OTHERWISE SPECIFIED)
(UNLESS OTHERWISE SPECIFIED)
COMMON CONNECTION
THE LINCOLN ELECTRIC CO.
CLEVELAND, OHIO U.S.A.
NONE
SCALE
F M 9-24-93
DR. DATE CHK.
10 VAC
B D 5
602 601
7 9 5
B4 B1
J14 J14 J14 J14
D1
D5
D2
X1
C1
OUT IN
500
50V
D3
GND
D4
FILE: S21145_1CA
FRAME CONNECTION
VOLTAGE NET
EARTH GROUND CONNECTION
EQUIP.
LN-9 & LN-9F (METRIC)
TYPE
METER BOARD SCHEMATIC
SUBJECT
SHT.
S
21145
SUP'S'D'G. NO.
G-4
LN-9