Lincoln Electric LN-25 SVM114-C Service Manual page 105

CONTROL BOARD
7W
2.7
D1
J9
667
R30
1
3A 600V
J9
624
4
J9
621 512
2
J9
530
3
J9
10
J9
150K
11 2.8K
J9
12
10
J9
500
9
J9
11
512 5
J9
D
606
C9
6
J9
530A
7
J9
2.21K
607
8
TIMER BOARD 2.8K
J6
607
3
J6
530A
2
J6
606
6
J6
512
4
J6
500
5
J6
530
1
COLD INCH
SWITCH
J7
500
1
J7
530
2
512A
D5
3 16
C5 C6 C7
X3 X4
3300
50V
LM2901 MC14538B
12 8
621
¤ ¤
BACK-UP COIL SUPPLY
2.7
5W
3300
5W
2.7
E
5W
22.1K
15.0K 5.62K
Q6
2N4401
13 4
X5
R29
2
X5
100
5
C10
2N4403
0.1
Q7
50V
R28
22.1K
DZ2
16V
22.1K
1W
CONTACTOR ON
COLD INCH LOCK OUT
6
1
X5
7
3
C11
X5
1.8
621
20V
LM2901
NOTES :
12
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
NUMBER.
Ch'ge.Sht.No.
2-20-98A
10-23-98E
This diagram is for reference only. It may not be accurate for all machines covered by this manual.
A
D2
Q1
1N4007
5A
1A
400V
1000V
R2
33.2
Q2
300mA
400V
REF
+ -
X2
TL431
22.1K
Q8
100
20A
11
500V
B
15.0K 12
A
+
C1
REF
X1
5600
22.1K
35V
TL431
-
1.82K
5
2
X3
621 621 4
512A
22.1K 8
X5
14
R37
9
D11
3.32K C14
2700p
50V
22.1K
621
3
3.32K
RST
5 7
R12
B /Q
X4
4 6
D8
A Q
T1 T2
1 2
C8
2700pf
50V
621
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
CAPACITORS =
RESISTORS = Ohms (
DIODES = 1A, 400V
FILE: M19065_1BA
THE LINCOLN ELECTRIC CO.
CLEVELAND, OHIO U.S.A.
SCALE
DR. MCW DATE
TO
CONTACTOR
512A
22.1K 5.62K
Q3
13
2N4401
RST
9 7
/Q
X4
10 1
X3
Q
R11
6
T1 T2
100
15 14
2N4403 DZ1
C2
Q4
16V
.0047
1W
50V
621
512A
621
10K
C
10
R18
13
X3 2.67K
11
512A
PULL-IN TIMER
C4
820p
511
100K
50V
8
14
X3
9
CURRENT LIMIT
C3
1.0
35V
LAST NO. USED
R-
C-
MFD ( .022/50V UNLESS OTHERWISE SPECIFIED)
LABELS
D-
1/4W UNLESS OTHERWISE SPECIFIED)
(UNLESS OTHERWISE SPECIFIED)
SUPPLY
POWER SUPPLY SOURCE POINT
COMMON CONNECTION
FRAME CONNECTION
EARTH GROUND CONNECTION
EQUIP.
LN-25
TYPE
CONTACTOR
SUBJECT
NONE
9/28/90
CHK. SUP'S'D'G.
J9
13
D3
1A
1000V
J9
14
Q5
7.8A
800V
1.0
B
1W
621
37
14
11
VOLTAGE NET
SCHEMATIC
SHT.
M19065
NO.