Lincoln Electric COMMANDER SVM145-B Service Manual page 165

G-4
SCHEMATIC - CONTROL PC BOARD
A
+12V
CURRENT SET POINT CIRCUITRY
R1
D12 5
100
J3
R75
77 56 7
8 R8 R5 X2 -B
+ t TP-A 6
100 C45 475
C8 2.7
0.1 50V R6
50V D13
GND 475
10K 10K 10K
J3
76
16 R2 R3 R79
C7 DZ8
R7 R9 C41
681K 1.8
8.2V
0.1
10K C9 20V
10K 1W 50V
0.1
D14
50V GND
TO CONTROL POT
GND
R74 GND GND
12
100
J3
R78
75 56 14
7 R76 R11 X2 -D
+ t 13 0.1
100 DZ3 100
50V
10V
C46 5W C50
2.7 R12
50V
475 GND
TP-B
GND
B
+12V
ABSOLUTE CURRENT
GND
LIMIT 550A
68.1K
3
TP-M 1N4936
1
-A
X2
C51
2
D38
56.2K 0.1
50V
R95
100K
C99
.0047
GND
50V
R102 R103
DZ9
R258 20.0K 7.68K
15.0K
R144
C55
20.0K
1.8
20V
OUTPUT VOLTAGE
FEEDBACK
J3
67 R29
2
D62
61.9K
1N4007
5
R180 R181
7
47.5K
1.00K X5
6
C4
1.8
20V
GND
R94
1.00K
2
J2 CURRENT
101 R227
1 X4 -A
1
1.00K
3
CURRENT AMP
J3
21
15 R36
5
10.0 10.0 10.0 10.0 1.30K
+ TP-F
C2 7
X4
SHUNT INPUT -B
0.27
6
50mv=400AMPS
50V
- J3
6 R37 R38
22
1.30K 102K
C32
GND
2700p
50V
D67
R47
475
GND
A
B C D
1.00K
1.00K
1.00K
1.00K
77
J2
102
7
J2 75
103
8
J2 76
104 Vin
6
J2 VOLTAGE
105
5 +12V
D1 D2
J2 109
106
3 4
J1 J3
1
12
J2 108
107
J3
2 1
J1 11 9
D3
D4
TP-J
GND
+12V
P5 P4
11 1 P3 P2 P1
4 8 11
90.9K
-D -A
-B -C -D
X13 -C
CC
12 13
5 6
9 8 22.1K
10 2
3 9 10
6 43.2K
56.2K
X13
-B
CV 90.9K
28.0K 26.7K
20.0K
3 4
5
10.0K
C10 PIPE X13 -A
2 1
C
13
GND
10
10.0K
8
X5 R225
9
TP-C
56.2K C100
1.0
35V
X12
CC -C
GND
9 8
+12V
6
11
X12
12.1K
12
4.75K
CV X12 -B
3 4
10
5
STARTING
R165
ENHANCEMENT
100K
GND -A
X12
PIPE
2 1
13
R166
221K 4.75K
3.32K
C76
0.1
50V 3.92K
GND
GND
D
12 TP-D
14
-D
12V X11
13
1W 2.43K
VOLTAGE FEEDBACK BUFFER
GND
+12V
1N4936
D9
AVE. CURRENT LIMIT
68.1K 400A
3
1
X5
TP-E
2
R184
R185
1.00K 33.2K
C30
31.6K
0.1
50V
GND
GND 10K
R40
C44
820p
50V
GND
D70
R118 Vref
TP-G
D46 10
10K
TP-N 8
R39 R41 X4
-C
13
9
221K 1.00K X4
-D
14 D66
C36
12
1.0 +12V
35V
SENSE CURRENT
R42 R44
GND
20.0K 22.1K
C37
162
20.0K
GND
GND
R200
56 D30 +12V
POW_+12
+ t
R77
Q1 TP-K
56
1 3
t 4.75K
+ R205
4.75K
C1
R206 2
150
4.75K 15V
R207 C42
+ 0.1 10K
C25 4.75K 1
R208
50V
1200
X7 8
100V
REF
TL431
DZ1
- 6
15V
5W
R20
TP-L
2.61K
+12V SUPPLY
-Vss
DZ12 FOR CONTROL CIRCUIT
5.1V
POW_gnd
1W
GND
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
ELECTRICAL DIAGRAMS
+12V
CURRENT TAIL OUT
10
8
X2 -C
16.5K 14
9
12
12
14 X18
R21 X5
C31
C33 13
54HC4066
2700p 475K
50V
6.19K
7
GND
100 R17
GND
22.1K
C16
DZ6
0.1
10V
1W 50V
GND
SET PT. BUFFER
GND
10
8
5
X9 -C
9 4
TP-H X19 -A
6
13
267
2 1
R198
MIN CURRENT
-A
X18
R106 R109
10.0K
22.1K 3.01K
R108
R110
AVE. CURRENT BUFFER
221K
Q2
10.0K
2 1A
5
10.0K X9 -A
R221 100V
1
7
C95 X9 -B R137
3
DZ4
18 6
15V GND
15V
1.00K
1W
GND
GND
267K
R132 X10
P5 -B
R220
4 3
221K
5 DZ13
+12V
R140
10V
1W
GND 221K
X10
P4 -A
R130
8 9 C98
61.9K
2.00K
6
24.3K 1.00K
R131
GND GND
221K X8
-D
P3
R128
+12V
11 10
39.2K 2N4403
12 Q3
R129
1.00K
221K
GND
X8 -C TAIL OUT MAGNITUDE
100K
P2
R126 4.75K
8 9
26.7K R250
Q5
6
1.00K 2N4401
R127 28.0K
20.0K
221K Q4
GND
2N4401
X8
-B
P1 9
11 GND
R141
4 3
20.0K 6
100K
8
5
X19 -C
R125 10
12
GND 9
221K X8 -A GND
8
10
R26
1 2
2.43K CV
13
277 J3
5
50K
PINCH/ARC FORCE POT
C105
J3 0.1
14
50V
278
GND
D41
R179
2.43K 1N4936
D61
GND
110
R241 2
J1
D68
1.00K
NOTES :
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.
+12V
14 14 14 14 4 14 15 4
X1
X14 X13 X12 X10 X9 X8 X2
54HC4066 54HC4066 54HC4066 54HC4066 54HC4066 MC33023
33074A 33074A
7 7 7 7 11 7 10 11
C74 C79 C78 C70
C77 C59 C52 C27
0.1 0.1 0.1 0.1 C28
0.1 0.1 0.1 0.1
50V 50V 50V 50V 0.1
50V 50V 50V 50V
50V
GND
ERROR AMP
setpoint
12
14
X9 -D
PWM
13
TP-I
R13
1
C11
221K
2
R15
X10 -D R18
3
22.1K
22.1K
11 10
C54 4
X10 -C .47
12 50V
5
R105 R19
R143 1 2
6
8.25K 4.75K
22.1K
221K
13 C39 7
0.1 820p
2 C12 8
50V 50V
3 .018
GND X19 -B
C73
1 50V
GND
C13
GND GND
X18 -B
+12V
R87
4 3 +12V
475
1.50K
5 C104
R177
R176
R174 R173
4.75K
20.0K 52.3K
2 C84 10
SCR1 GND
0.1
8
800mA
50V X11 -C
200V
D69 9
6
3 1 X11 -B GND
3
7
TP-P
5
D59
R175 R243
C93 1N4936
0.1
10.0K 10.0K
33.2K
50V
R259
10.0K
D60
1N4936
C103
0.1
GND 50V
+12V
-D 12
X19
11
13
D48
47.5K
GND
D49
C102
Q6 2.7
100K
50V
100K
D50
100K 2N4401
GND D51
100K
D57
R69
10.0K D52
GND
GND
D56
R142
475
R68
475
R67
475
R66
475
R65
475
R64
D54
475
R63
D55 475 C67
C63 C65
0.1
0.1 0.1
50V
50V 50V
C66 C68
C64
0.1 0.1
0.1
50V 50V
50V
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
CAPACITORS = MFD (
RESISTORS = Ohms (
DIODES = 1A, 400V
J2=8 PINS
J3=16 PINS
J4=10 PINS
FILENAME: G3001_1B1
G-4
4 14 C26
0.1
4 4
50V
X19
X5
X11
4093B X4
33074A
LT1014
33074A
11 7
11 11
C29 C96
C81
0.1 0.1 C62
0.1 C82
50V 50V 0.1
50V 0.1
50V
50V
Vref -Vss
POW_+12
10
R235 25A
J3
INV X1 Vref 16
R88 200
NON INV Vcc 15
4.75K
OUT 14
COMP 25
R72 13
CLOCK PWR Vcc J3
13
1 C15 200
Rt PWR Gnd 12 1.0 TO DRIVER BOARD
2 35V
Ct Ilim ref 11 23
R73 12
J3
RAMP GND 10
200
Ilim
SOFT START 9
11
R233 23A
MC33023 J3
200
0.1 C14
50V 1.0
C48
35V
GND GND
0.1
POW_gnd
50V
POW_gnd
GND IMBALANCE DETECTOR
3 69
R256 R167 3
J3
1
4.75K 100K
X11 -A
2
68
R257 R168 4
J3
4.75K 100K
4.75K
DZ11
R172
10V
100K 1W
4.75K
DZ10
10V
1W
100K
GND
90
R187 6
J1
475
OCI1
5 1
CNY17-3
4 6 2
R196 3 91
J1
475
267K
GND
CC
R139 10
220
J4
475
PIPE 5 PIPE 5
6
J4 215
PIPE4 PIPE4
2
J4 216
PIPE3 PIPE3
5
J4 217
PIPE2 PIPE2 5 4
7
J4 218
6 3
PIPE 1 PIPE 1
8
J4 219
7
2
CV MIG
9
J4 214
CV INN 8 1
4 CC
J4 213
C72
0.1
+15V
50V 1
+12V
J4 222
C80
0.1
50V
1.00K
D39
GND
C53
0.1
50V
GND
LAST NO. USED
R- 260 Q- 6 SCR- 1
C- 105 X- 19 OCI- 1
.022/50V UNLESS OTHERWISE SPECIFIED)
LABELS D- 70 DZ- 13
1/4W UNLESS OTHERWISE SPECIFIED)
(UNLESS OTHERWISE SPECIFIED)
SUPPLY VOLTAGE NET
POWER SUPPLY SOURCE POINT
COMMON CONNECTION
FRAME CONNECTION
EARTH GROUND CONNECTION
8-14-98A
G
3001
COMMANDER 300