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DIAGRAMS
G-3 G-3
WELDANPOWER 125
IDLER PC BOARD (M17578) SCHEMATIC
1N4936
D12
1.50K
R14
10K
R23
50V
.47
C11
5W
10V
DZ3
1W
15V
DZ4
51.1K
R22
162
R18
10K
R24
50V
0.1
C13
22.1K
R25
43.2K
R29
X1
4
2
5
18
15V
C12
Q3
2N4401
3.01K
R10
47.5K
R20
C7
681
R1
LM2901
X1
3
12
C9
1N4936
D6
26.7K
R12
31.6K
R4
X1
13
10
11
5W
.5
R11
39
10V
C1
18
15V
C5
10K
R28
COM
COM
COM
+8V
COM
CURRENT
SENSE
RESISTORS = Ohms (
1A, 400V
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
NOTES :
NUMBER.
D-
SUPPLY
LABELS
C-
WELDANPOWER 125
POWER SUPPLY SOURCE POINT
14
FRAME CONNECTION
R-
(UNLESS OTHERWISE SPECIFIED)
.022/50V
1/4W
(
GENERAL INFORMATION
DIODES =
UNLESS OTHERWISE SPECIFIED)
UNLESS OTHERWISE SPECIFIED)
MFD
CAPACITORS =
EARTH GROUND CONNECTION
MM
17630
30
1
J1
FILE: M17630_1BB
RHEOSTAT
INPUT
100V
1A
Q4
+8V
COM
COM
+8V
10
5
4
1
COM
2
SNUBBER
204
J2
ELECTRICAL SYMBOLS PER E1537
MOLEX
3
13
LAST NO. USED
COMMON CONNECTION
VOLTAGE NET
6
14
208
209
9B
203
16
200A
TO
FLASHING
202A
TO
RHEOSTAT
SOLENOID
TO
NOT USED
J1
1
150
R16
150
R26
J2
4
5W
3300
R13
38J
130V
TP1
150
R27
150
R17
J2
3
600V
.05
C8
D5
D13
133K
R6
300V
1A
Q2
X1
8
14
9
68
63V
C6
47.5K
R7
X1
1
6
7
10K
R3
10K
R5
200
12/16V
C2
221K
R2
1W
15V
DZ2
5.11K
R8
G
D
S
18A
200V
Q1
5.11K
R9
J1
10
4.75K
R30
1W
8.2V
DZ1
68
63V
C14
50V
0.1
C3
J1
4
D11
J1
8
J2
2
D3
1N5406
12Vdc
CR1
2
1
D9
1N5406
J1
2
D4
1N5406
J1
7
CR1
5
3
+
t
.25
R15
D10
CR1
5
4
J1
9
J2
1
J1
6
J1
3
J1
5
D1
1N5406
D2
1N5406
SCHEMATIC - IDLER P.C. BOARD
2-17-95
NOTE: Lincoln Electric assumes no responsibility for liabilities resulting from board level troubleshooting. PC
Board repairs will invalidate your factory warranty. This Printed Circuit Board Schematic is provided for
reference only. It may not be totally applicable to your machine’s specific PC board version. This dia-
gram is intended to provide general information regarding PC board function.