Lincoln Electric SVM136-A Control PC Board G2629-1 Schematic, Electrical Diagrams, to Section TOC

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G-5

ELECTRICAL DIAGRAMS

Control PC Board (G2629-1) Schematic

8419	L	2		41		2
		04				40		2		4		METERS		METERS
			J1		J1		J1		J1		J1		206		205
		5		1		8		7		4

								G-5
201	202	203	201		202		203		PrintedCircuit Board	repairsince it may com-
			2	J1	3	J1	6	J1

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5			6
	X1
		7

-10V

3			2
	X1
		1

C30

	LM2	X1
11
	2
	4
	LM2	X2
11
	2
	4
	LM2	X3
11
	2
	4
		C31

444

	243	R174	243	R173	243	R172
10W	160	D81			D82	DZ1 24V 5W
R151							4
			R177-
	R177
			R189=68.1K1/4W					OUTPUT
	R183
	R178
	R179
	R180
	R181
	R182
	R184			R150	1.5K15	R149	1.5K15	PILOT
	R185
	R186
	R187
+1	R188				W		W
5V	R189							CIRCUIT
D78	D77		D75
	D76	15V 5W			DZ13
								R60
	6.2V 1W	DZ12	100	R152				1.00K

				OCI1 CNY17-3 1
C44 4.7 35V		100K	2 6
	R153

		6	2 J		J	J 1		5	J
			2		2		2		2
	C37 .047 100V					100V	C38 .047		K
					L
					R43
			475	R35		150	150	R36	-10V
	CURRENT AMP								R37
			43.2K	R39	9		8	10	221K
							1X
									G
	+15V					100K	R56	R124	10K
2.21K	R61				4.7 35V	C24			D31
	R176				2		3
	10K	221K	R62		1			CURRENT LIMITER
						2X

					-10V
10V 5W	DZ10		10W	SUPPLY 250
			R148
				A
			150 50V		C43
	50K			+15V
	R38
		CW
TRIM		CURRENT AMP OFFSET
	D5		100K	R57
	5
20V	1.8	C15	E
R58
2.		6		5
21K			X3
			7

	600V
	600V
	600V
R40	2.70
	2.5W

10 0K

R59

SWITCH

D71	600		D68
	V
D72	600		D69
	V
D73	600		D70
	V
			R41
	150 50V		C40
			IN
			X5
		GND
			OUT
	5W	DZ9 17V
	35V	C41 4.7
CURRENT	+15V

D21

D20

D19

repairswill invalidate your factory warranty.Individual Electricdiscourages board level troubleshootingand board repairs could result in damage tomachine.the

10K

600

600

600

V

V

V

+15V SUPPLY D 2.70 2.5W

R144

35V

47

C39

D

22

+15V

R143

R142

+15V 1K 5W

R141

221K

R155

10K

12

X3

13

POWER OUTPUT

R140

10K

2.67K

14

D80

UP CLAMP

R156

4

220

13

J2

.7K

1.50K

1.50K

1400V

C45 .0047

R159

R158

74D

10K 415R10K 23D

R146

.173K D41

175R

RECTIFIERBRIDGE VOLTAGEBUFFER

-10V

D42 10

9

Return

Return

12.1K

D62

4

5

+15V

2.21K

-10V

R70

R71

R115

R50

R51

+15V

CW

10K

1.82

MIN.

13

X

12

100K

13

X1

12

BUFFER

MAX.

K

BUFFER

2

D52

14

14

-10V

OUTPUT

D32

267

R76

D33

+15V

-10V

D35

R75

100

D3

OUTPUT

+15V

-10V

C19

4

R82

C17

C18

R77

4

.

75K

+

R79

56

1.50K

+

R78

56

+

R81

56

t

t

t

START PRESET		D83	X3	15.0K	D37
			1	R90
		3		2
R94				R91	+15V
15.0K		R175	100K	10K	C20 1.8 20V
1.8 20V	C22
	R93				D50
	4.75K

R83

	D7	2.67K	R154
	9
	D51	+15V	D47	475K
10K	50V	C46 0.1	10	9
			CONTROL	X3
	15.0K			8
	R139

R89

M

X2

leveltroubleshooting. PC Board providedfor reference only. Lincoln Operatoror Technician. ImproperPC

22.1K

8

C35

R95

.15

.33

R190

TL43

X

100V

C23

5

-10V D63 R134

6

1

4 8

1

0V

1.00K

REF

1.82K

R193

1

R88

33.2K

22

5.0K

10K

R98

1K

R

2.

R

R135

191

00K

192

D40 .432K

S

D

100K

Q8 2N4857

5

6

PROTECTION

CAPACITOR OVER-VOLTAGE

R137

X

475K R99

2

C36 4.7 35V

7

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J2 8	J2 7				J2 3
							R114
75	213				212	75	68 5W D6
						.0	7
	C3 4.7 35V			DZ3	R197	75.0
			15V
			1W		R198	75.0
	R9			R6
					R199
	2.67K	D6		2.67K	D3
FIRING CIRCUIT							J
				R13	R87
	.15 200				475	4A	SCR3
	4.75K V		QU3	267		400V
	R19		026N27 D9	R16	R2	2
	6C	200		010K	1.00K
		R171			R168
			C9		267	D15
	100K					D18	D12
			CW	50K

		R31	R28
			562
		N	R162
		Q2 15A 60V
	G		R165
DZ5 15V	S	D	562
1W

20	1.00K	D49		10K	+15V
3	R63			R64
		35V	C2 4.7	15V	DZ2
				1W
		R8			R5
		2.67K	D5		2.67K

		R12
C5 .15 200V	Q 2N	100K
4.75K	U2 6027
R18
20	D8
0
R170
100K	CW C8	50K
R30		R27
		562
	R161
	R164
		562

267

R15

R167

267

D48

		R113
		68 5W
75		D6
.0		6
R194	75.0
R195	75.0
R196
D2		I
R86
4	4	SCR2
75	400
	A
	V
R21
1.00K
	D14
	D17	D11

									R112	201	no responsibility for liablilities resulting fromboard availablefrom Lincoln Electric. This informationis design and may result in danger to theMachine
							75.0		68 5W
35V				DZ1			R1	75.0
	C1 4.7	15V
		1W					R2	75.0
R7				R4			R3
2.67K	D4			2.67K			D
							1
				R11			R10
C4 .15 4.75K 200V				100K			475	4A
		QU1 2N6027			267			400V
R17		D7			R14		R20
	2
	00
	R169					R166
100K				50K
R29				R26
202		7C		562		267	.010K	D13D16	D10 H 1SRC 65D
			R160
			R163
			CW	562

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C12	C
	11

	J3		J3		J3
4		3		2

G3 204 G2

IDEALARC CV-400

C10		J3
		L	9148
		7-18-97J
	11G		LincolnassumesElectric Componentsnotare promisequalitythetheof
			NOTE: