Lincoln Electric SVM129-B Schematic Control PC Board Codes 10151 11092 G2781 Sheet 2, Section

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TOC

G-7	ELECTRICAL DIAGRAMS	G-7
Schematic - Control PC Board - Codes 10151 - 11092 - (G2781 Sheet 2 of 2)

B-2781 G FRONT END

Section

Master

	Varc FILTERED		J17
137K. R100 137K. R101 137K. R102 137K. R103 .137K R104 .137K R105 .137K R106 .137K R107
	CONTROL OPTION
	TO ENERGY
		10
J5

- STUD7

+12VFE

+12VFE

J5	FE
3

100p

100V

.67K	R138
2

TRIGGER CIRCUIT

Return to

Return to

	J5
	6
INPUT FROM		C100
VOLTAGE
SENSE PANEL	.0047
	3000V
	J5
	5
	R115	R116
	13.7K	13.7K
	R117	R118
	13.7K	13.7K
	R119	R120

47.5K

		R109				C102
				DZ1		R110
	R111	75K.4		12V		47.5K
				1W
C101					2	X4 A		4.75K
.001		47.5K		FE			1	R159
400V		R112				OP470
					3
20.0K R162	R108	20.0K	12V	5K.47 R114	C103
					100V
			DZ2		1	00p
			1W
D100				FE		+12VFE
1N4007
					68.1K R123

ARC VOLT FILTER

				DV/DT Varc
					SAMPLE
					X3	A
			VARC_SCALED
				3		2
C104		D101	R113 4.75K	6
.0047		1N914			SMP04		R137 10K
50V
	FE			+12VFE
	+12VFE		FE			C109
						820p
	R125	75K.4	_STROBE	825	R165	50V
						FE
1.00M				D117	NEG_CLAMP
R124			SMP
				1N914

1V REF

CW

.400V

.25K

R141

243

R139

R140

8

C108

10K

DV/DT

1.8

C107

4

20V

10

0.1

TRIP

B

OCI2

TURN

50V

NEW DV/DT

FE

DERIVATIVE

Varc SAMPLE

X3

B

11

HP2231

3

5

X5 B

13

5

1

R142

10K

X4

B

7

dv/dt

10 2901

DV/DT 2

7

R143

OP470

SMP04

100K

6

H=LOW DV/DT

100K

L=HIGH DV/DT

R144

X3

C

FE

DV/DT 10X

R145

AMPLIFIER

11

15

DV/DT LEVEL DETECT TO DIGITAL LOGIC

( SHEET 1 )

1.00K

D200

PRIMARY CURRENT

R200

FEEDBACK 125:1 RATIO

D201

D202

R202

R203

R204

R205

1.30K

R242

1N4936

Y

J4

R201

PRI_FB

1N4936

1N4936

2

C201

+15V

Y

J4

C200

.0

.0

.0

.0

.0

10

10

10

10

10

( SHEET 1 )

CURRENT

8

.33

267

R241

TRANS.

26.7 R206

200V

26.7 R209

D203

D204

100K

R232

1.7V = 150A PRIMARY

1N4936

1N4936

26.7

26.7

R207

R208

+15V

R234

+15V

C206

332K

10K

R233

+15V

R237

J4

3.6V

10K

R213

5

10K

X28

2

				+15V
					( SHEET 1 )
					PWM_EN	PWM ENABLE
			10K	R236
						TO ANALOG LOGIC
9
						( SHEET 1 )
	X28	C	14
8	2901

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A

		J5	13.7K	13.7K
+ STUD	1		R121	R122
			13.7K	13.7K

		+12VFE
	26.7K
+12VFE			R129

51.1K

		9
		X5		D
		2901
R126		8
	68.1K R127	D102
		1N914
		4	.75K
			R128

3.92K

14

R164

DV/DT SAMPLE PULSE

C105

D116 1N914

FE

SHORT DETECT Varc SAMPLE

X3 D

9	10K		+12VFE
	SMP04
	+12VFE
	OLD DV/DT	ARC
	Varc SAMPLE		.25K	R146
		DETECTOR
			8
	R147
		10K		1

PHASE A	3.92K
	OCI5 B

		22.1K R132
R130	R131 .92K
	3
		FE

47.5K

R133

DT_RC

FE

+12VFE

R135 267K

7	R136 4.75K
X5 C 1

100p

100V

D115

1N914 NEG_CLAMP

DT_DELAYED OUT

1214

SMP04

R148

C110

10K 820p

50V

FE

1.89V NORMAL

ARC TRIP
332	R149

				J17	A	OCI2
4			4
	X5	A
			2
	2901

5HP2231

ARC 2	2
DZ3	H=SHORT

ARC/SHORT DETECT TO DIGITAL LOGIC

( SHEET 1 )

	3	R210	R211		6	X28 B	D205		2901
								4
		22.1K	47.5K	C202
							1		H=PWM ON
			R212 15.0K			2901			L=PWM OFF
					7		1N4936	C205
							100K R235
								330p
TRIGGER						8.95V		100V
OPTOCOUPLER
ON POWER			R214
BOARD		C203	10K	C204
				0.1
			47.5K R215
				50V
OVERVOLTAGE
OPTOCOUPLERS		J4
ON PROTECTION
BOARD	11

H=PWM OFF

L=PWM ON

TRIGGER

INTERFACE

FROM 6

1

	2901
6

2.3V PINCH START

D104 L=ARC

PWM HP2231

X6 A	3
2

R134

D103 1.00K 1N914

	3.92K
C106	R163
	DT_DELAYED

9

X6 D 10

1N914

+12VFE

PHASE B	OCI5 A
FROM	7

PWM	HP2231
DT

DT
13
X6 B	11
12
	DT

330p

100V

FE

8

TRUNCATES DT_DELAYED

ARC DETECTOR ADJUSTMENT FOR INITIAL PINCH PULSE

CW	R150
5K
681	R151

15V

1W

Q1	3.92K	R152
		B OCI1
2N4401	3.92K
		6
	R153

HP2231

PINCH KILLER Varc ADJUST ( SHEET 1 )

		OVERCURRENT FAULT	CR 1	CR1	R239	CR1
	Y	FROM SHEET 1		6
		J4				9
			R216	4	+ t
		10
OVERHEAT INDICATOR				8	.13 60V	13
		D206	2.21K
						11
		J4
		6
CHOKE	FAN
TSTAT	TSTAT
		5W
		FAN R
		150
T1 AUX XFMR		J4
24 VAC		12
					J4

( UNUSED CONTACT )

DZ4	R217	R218
43V	1.30K	1.30K
1W
	R219	R220
	1.30K	1.30K
	R221	R222
	1.30K	1.30K
DZ5	R223	R224
43V
	1.30K	1.30K
1W

R225 1.50K R226 1.50K R227 1.50K R228 1.50K

D207	D208
		DZ6
		3.3V
		1W
	10K	R240
		C207
		20
		50V
D209	D210

267		R230 10.0
R229
CNY17-3
1	OCI7	5
D211		ON=TRIGGER ON
		OFF=TRIGGER OFF
2	6	4
	47.5K R231

J17

8 R154 1.50K

ENERGY CONTROL

OPTION ENABLE

	FE
	DIODE ON = OPTION ENABLED
D105	DIODE OFF = OPTION DISABLED
1N4936

1

A

OCI3

ENERGY CONTROL OPTION ENABLE

C	D	J4	TO POWER BOARD	5	R238
		9			+ t
	TRIGGER
TO POWER					56
BOARD

ISOLATED CIRCUIT

J17

9R155

		1.50K
7	J17	R160
		1.50K

ENERGY CONTROL

OPTION P BOOST

TIME

J17

2R161

1.50K

	DIODE ON	= OPTION P_BOOST TIME
D106	DIODE OFF = LOCAL P_BOOST TIME
1N4936			OR NOT OPTION
			P_BOOST TIME

HP2231 2

4

B

OCI3

HP2231 3

( SHEET 1 )

ENERGY CONTROL OPTION P BOOST TIME ( SHEET 1 )

		+15V
UNUSED	3
J4		C211	X28 "D" COMPARITOR
4	X28		ON SHEET 1
		0.1
J4	COMPARATOR	50V
	LM2901
1
	12

J4 7

H = PINCH

A

OCI1

L = NOT PINCH

J17

7

1

HP2231

H = START PLASMA BOOST TIMING

A

OCI6

L = NOT PLASMA BOOST

J17

5

7

HP2231

H = STAINLESS

B

OCI6

L = MILD STEEL

J17

6

12

ISOLATED CIRCUIT

HP2231

+12VFE

+12VFE

+12VFE

POS FE POWER PLANE

14

16

Vcc

8

Vcc

8

Vcc

8

J17

+12V OUT

C121

Vdd

C122

OCI5

C123

OCI1

C

128

OCI6

C129

3

D107

X6

X3

0.1

0.1

NAND

0.1

0.1

0.1

50V

50V

4093B

SMP04

50V

HP2231

HP2231

50V

HP2231

50V

X1

Dgnd

Vss

GND 5

GND 5

GND 5

7

8

13

D108

D109

IN

LM350

OUT

1N4007

1N4007

s15128-15k1

FE GROUND PLANE

1.82K

C111

C112

ADJ

FE

FE

36 VAC

R156

R157

J5

35V

XFMR

C117

1000

D113

8

500

243

C118

18 VAC

27

C113

R158

35V

+12VFE

UNUSED GATES

.0047

CW

CT

J5

1400V

POS FE POWER PLANE

2

C114

C115

GND

C119

C120

D114

C124

V+

4

3

C126

+12VFE

.0047

47

27

0.1

0.1

1400V

18 VAC

J5

35V

C116

X2

35V

50V

50V

6

X6

C

4

4

X4

X5

IN

7915

OUT

5

NAND

OP AMP

COMPARATOR

D111

D110

s15128-12

C125

OP470

LM2901

C127

1N4007

PINCH SIGNAL FOR ENERGY CONTROL OPTION ( SHEET 1 )

PB_START SIGNAL FOR ENERGY CONTROL OPTION ( SHEET 1 )

WIRE TYPE POSITION ENERGY CONTROL OPTION ( SHEET 1 )

1N4007

-15VFE

0.1

V- 11

0.1

J17

D112

50V

12

50V

10

ENERGY

-15V OUT

11

FE

FE

NEG FE POWER NET

X4 C

8

CONTROL

FE

OPTION

COMMON OUT

J17

9

OP470

6

-15VFE

-15VFE

12

POWER SUPPLY FOR "FRONT END"

X4 D

14

13

OP470

FE

1

4

Front End

1

6

Energy

1

6

Trigger Circuit

Control

5

8

Vac and Varc

7

12

7

12 I/O and Vac

Option

J5

J17

J4

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.

FILE: G2781_1D1

GENERAL INFORMATION

LAST NO. USED

DZ20

ELECTRICAL SYMBOLS PER E1537

R-

165, 242, 345, 564

OCI7

CAPACITORS =

MFD ( .022/50V

UNLESS OTHERWISE SPECIFIED)

C-

129, 211, 314, 475

X36

RESISTORS = Ohms (

1/4W UNLESS OTHERWISE SPECIFIED)

LABELS

D-

117, 211, 310, 424

Q10

DIODES =

1A, 400V

(UNLESS OTHERWISE SPECIFIED)

W4

SUPPLY

VOLTAGE NET

REFERENCE DESIGNATOR SERIES DEFINITIONS

POWER SUPPLY SOURCE POINT

100 SERIES- ARC SENSE CIRCUIT

(SHEET 2)

COMMON CONNECTION

200 SERIES- TRIGGER CIRCUIT

(SHEET 2)

FRAME CONNECTION

300 SERIES- DIGITAL LOGIC CIRCUIT (SHEET 1)

EARTH GROUND CONNECTION

400 SERIES- ANALOG LOGIC CIRCUIT

(SHEET 1)

UNLESS OTHERWISE SPECIFIED TOLERANCE

THE LINCOLN ELECTRIC CO.

TYPE

STT CONTROL

Ch'ge.Sht.No.

EQUIP.

ON HOLES SIZES PER E-2056

5-19-95

CLEVELAND, OHIO U.S.A.

SCHEMATIC (Sheet 2 of 2)

ON 2 PLACE DECIMALS IS + .O2

SUBJECT

ON 3 PLACE DECIMALS IS + .OO2

5-24-96E

SCALE

NONE

ON ALL ANGLES IS + .5 OF A DEGREE

FV

NO.SHT. G 2781-B

MATERIAL TOLERANCE ("t") TO AGREE

DR.

MLD

DATE

04/04/94

CHK.

SUP'S'D'G.

WITH PUBLISHED STANDARDS

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	INVERTEC STT & STT II
	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.