Pm Control Schematic - Lincoln Electric SVM138-A Service Manual

G-8

PM Control Schematic

J 1 0
5 2 5 10
C 4
4.7
3 5 V
F R O M
P O W E R
B O A R D
J 1 0
510 9
C14
4.7
3 5 V
J 1 0
5 0 0 14
5 2 5
+ 1 5 V
33.2K
15.0K
5 1 0 A
5 2 5
+ 1 5 V
5 2 5
R E D
10K
H A L L
E F F E C T
5 5 5
M O D U L E
B L U E
510
B L K
5 2 5
4 7 . 5 K
13
14
X 4
12
C 3 0
15.0K 2.7
5 0 V
D 7
D 9
J 1 0 MOTOR DISABLE
5 2 4 A 11
J 1 0
5 2 4 A 15
J 1 0
7
522
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.
5 2 5
+ 1 5 V
Q 7
6 0 0 m A
11 10
Vc Vo
X1 4 0 V
6 Vref ILIMIT 2
10.0
1 Vcc 12
NC
R 4 3
8 3
NC ISENSE
1.00K
14 4
NC -Vin
5 Vz 9 1.00K
+Vin
C 2
7
Vee COMP 13
C1
L M 7 2 3
5 0 0
C 3
18
15V
CW
2 . 9 4 K
5 1 0 A
5 0 0
-10V
5 2 0
+ 1 0 V
2
11 TACH INPUT ISINK 8
X 3
6 5 3
NC ISOURCE
X 2
12
7 NC GND
13 IBIAS 10
NC
5 . 6 2 K
14 4
NC IBIAS
9
1 TACH INPUT V+
R 7
2 3
Ic /
10K
L M 2 9 0 7
J 1 0
5
631
CW
6
10K J 1 0
13
W I R E
6 3 2
S P E E D
X 3
C O N T R O L
68.1K 12
6 3 3
C16 C 5 C 6
4
1 0 0 p .0033 .33
CW
1 0 0 V 2 0 0 V 5 0 V J 1 0
C15
18
1 0 0 K 15V
5 6 2
5 1 0 A
511
R12 R14
15.0K 1.00K
9
CW
X 3
R U N - I N
10
2 0 K
33.2K
5 2 5
1.00K + 1 5 V
4 7 . 5 K
Q 8
R 4 7 R 4 8
2N4401
10.0K 10.0K
Q1
6 0 0 m A
D Z 5
4 0 V
10V
1 W
D10 D11
D 2
C 2 6
4 7 . 5 K
D1
1 0 0 K
CURRENT FLOWING
ELECTRICAL DIAGRAMS
5 2 5 5 2 5
+ 1 5 V + 1 5 V
9
8
X 4
10
4 4
C17 C19
X 3 X 4
5 2 0
5 0 0
+ 1 0 V
-10V L M 2 2 4 L M 2 2 4
C 2 0
C18
11 11
5 1 0 A
5 0 0 5 0 0
-10V -10V
J
C 9
15.0K
.047
R21 1 0 0 V
512
C 8
4
5 0 V
1 6
R 4 4 R17 1.00M
7
2 6 7 1.00K
X 3
15.0K
5
C12
K
5 1 0 A
511
2
1
X 4
CW
3
10K
14
R 2 R18
C10
2 6 7 1.00K 13.7K
2.7
5 0 V
C13
C 2 3
D 4
6
7
X 4
5
D 5
8
16
1.00K
D 8
S1
O P E N - S L O W
C L O S E D - F A S T
1
CW
5 2 5
+ 1 5 V
5 0 K
33.2K
DZ1
6.8V
C 7
Q 2
1 W
3.9
6 0 0 m A
3 5 V
4 0 V
6.81K
C 2 2
1 0 0 K
1.00K D 3
C 2 9
.47
5 0 V
5 0 0
-10V
5 2 5 5 2 0
+ 1 0 V
+ 1 5 V
12 9
5 2 0
C21 + 1 0 V
X1 X 2
L M 7 2 3 L M 2 9 0 7
J 1 0
T O
7 12 5 2 0 V O L T A G E
1
P C B
5 1 0 A 5 1 0 A
J 1 0
512
2
J 1 0
T O
511 M E T E R
3
C I R C U I T
J 1 0
5 1 0 A
8
5 1 0 A
5 2 5
+ 1 5 V
22.1K
CW
D 6
10K
6.81K 10K
C 2 4
Q 4
6 0 0 m A
4 0 V
M
Q 3
6 0 0 m A R31
4 0 V
15.0
C 2 8
D Z 3
3 V
5 0 0 m W
C11
QU1
.15
2 N 6 0 2 7
1 0 0 V
L
C 2 5
D Z 4
3 0 V
1 W
P O W E R
B O A R D
J 1 0
5 4 0
12
PUT
RESET
Q5
1A
1 0 0 V
15.0K
Q 6
5 0 0 6 0 0 m A
10K -10V
4 0 V
D Z 2
16V
1 W
100 C 2 7
2 . 6 7 K
10K
G-8
J 1 0
F R O M
6 2 8 P O W E R
13
P C B
LN-9 GMA