Lincoln Electric SVM127-A service manual Operating Schematic

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

G-3

ELECTRICAL DIAGRAMS

OPERATING SCHEMATIC

1702

G

A INPUT AND MOTOR POWER CIRCUIT

B CONTROL POWER SUPPLY AND RELAY CIRCUIT

C

MOTOR CONTROL CIRCUIT

32

5 AMP CIRCUIT BREAKER

WIRE FEED

S7

525 B

B

628

MOTOR

DIRECTION

628

529

32A

FIELD

SWITCH

628

F101

532

D110

CR2

C115

520

525

525 B

Q207

B

32A

R101

Q101

D111

R108

Q103

+

D106

D107

CR101

11 12 10

R243

+10.00 V.

541

C204

7

TP

PT

PT

626

2

525

B

C221

C209

626B

525

6

R203R204

R211

C217

C219

R239

R230

101

SCR102

C103

D103

R

R102

R103

R109

D116

R104

R201

R209

3

6

R221

R238

2

R233

R235

R236

5

1

C102

101

101

U

526

526

D112

3

+15V

D115

SCR101

TP1

C109

C114

X201

9

8

-

4

C208

C101

FWD

REV.

28 VAC

D114

4

REF

10

2

X203

512

CW

LO

A

R244

-

-

4

X204

CW

11

R217

D206

R229

115 VAC

528

R107

521

R105

R205

R206

R207

C205

C206

R208

5

R210

R242R2

C215

+

11

C218

D

R222

A

R226

C228

Q203

B

W

527

C202

+

CW

631

500

C212

5

+

7

3

+

1

7

C111

TP

539

627

627B

THERMOSTAT

+

DZ101

522

INTERLOCK

7

C203

1

12

2

3

4

CONTROL

B

H1

C224

C110

D101

D102

102

D104

C112

C113

524

ON

C216

CW

632

-

X203

511

C210

+

601

C107

CR501

TRIGGER

C201

CAL

633

13

B

R202

R218

C220

D105

10 VAC

INTERLOCK

+

12

+

500

510

530

14

Q204

602

OFF

+

C213

B

CR101

T1

D509

ZERO

531

CR101

VOLT

521

+

512

R231

D109

REFERENCE

+

R212

R214

D108

530

D

C108

Q102

R241R240

C

C223

R1

531

115 VAC

DZ102

C214

B

-

R219

-

500

S2B

R106

D204

31

31

500

510B

510A

10

+

C

10

+

B

QU201

32A

-10V

X203

PIN

PIN

X204

525

5

F

S

C211

C225

D

4

HOT

T2

HOT COLD

555

R225

D205

502

C

R213

R220

ACC

D208

540

2A

INTERLOCK

511

CW

Q205

1

COLD

24 VAC

S1

SWITCH

525

6

HOT

620

D202

Q201

3

2

621

TRIGGER

TACH

B

504 CR101

620 621

SWITCH

PICK-UP

525

B

R533

A

+

Q206

2

4

P.C. BOARD

R223

C105

TRIGGER

622

B

R215

R216

C207

R224

R227

R228

R232

R234

R237

S2A

BOARD

622

555

525

R534

B

C226

DZ201

HOT-COLD

500

530

623

623

Q202

PT

INTERLOCK SWITCH

D201

1

5

101

C227

D203

C222

BURNBACK RECEPTACLE

500

530

OCI

(SHOWN WITH JUMPER

B

B

501

PLUG INSTALLED)

2

6

4

500

525

D TRIGGER AND TACH CIRCUIT

C507

12

+

B

B

R506

PIN F

14

C509

C503

C508

+

D

Q501

R513

+

WHITE

R510

13

- X502

524

B

67

667

C520

500

PIN S

D517

DZ

SWITCH

TP

R501

13

A

B

2

A

+ R509

R511

CW

R541

R540

R538

501

525

S5

S3

501

START

GAIN

C 511

512

C

E

514

515

E

4

B

SET

ACTUAL

POLARITY

-

14

R535

R507

-

C518

C

POS

R502

CW

12

+

X501

3

+

1

CW

525

D514

CR

R526

R528

S6

C3 513

C1

C2

CAL

11

X502

501

516

NEG

D502

C521

PIN A

R542

R512

R525

+

8

IN./MIN.

510

C502

R503

C501

B

E

10

560

517

1 2

517

M/MIN

LO

+

C515

6 7

500

525

D506

BLUE

X502

561

11

3

VOLTS

F501

B

R504

6

B

7 R536

R537

R539

R532

2 -

1

PIN B

R520

R522

5

4

C511

R524

8

C

9

R529

R408

R406

R401

518

518

D513

C506

+

-

510B

X501

515

C512

C407

C406

C404

562

-

D510

5

+

D503

D516

3

+

D

+

7

D518

CR501

R527

CW

C519

C505

+

-

R530

CW

R402

CW

A

1 +5V

11 X502

C504

X501

D505

S

D

B

DZ502

533

R409

R407

3

TP5

510B

R505

R519

R521

R523

6

R531

D515

R4

534

B

D501

DZ503

Q502

D511

Q503

CR4

4

OUT

IN

B

C522

D512

C514

TP4

DM401

2

X401

D402

21

D504

R508

525

+

530

S4

R403

+ C403

E

C

+

GND

+ D401

601

B

500

B

521A

D507

C513

B

G.L.P. RESET

C402

C401

602

520

B

SHUTDOWN

525

521 500

R516

B

BYPASS TABS

D403

D404

VOLTAGE P.C. BOARD RECEPTACLE

R514

500

510C

510

FOR OPTIONAL PULSE POWER

FILTER P.C. BOARD PLUG

+

B

510A

510B

(SHOWN WITH JUMPER PLUG

1

4 3

2

634

R517

X501

INSTALLED). EARLIER VOLTAGE

-

C517

9

P.C. BOARDS DO NOT HAVE THE

"VOLTS"

CW

10

C

8

R518

514

D508

LN-9 ABOVE CODE

4 PIN RECEPTACLE AND 521A IS 521.

R3

+

GND

CONTROL

635

9131 AND LN-9F

636

+

USED ON LN-9

R5

500

521A

BELOW CODE 9131

R515

C510

C516

B

E

510B

E

VOLTAGE CONTROL CIRCUIT

F

SHUTDOWN CIRCUIT

G

METER CIRCUIT

G-3

Return to Section TOC

Return to Master TOC

			POWER CIRCUIT
	C101		.005 MFD	F101 1/2 A. SLOW BLOW FUSE
	C102		.047 MFD
	C103		.047 MFD	R101
*	C104		.022 MFD		40 OHM 12 W
	C105		.01 MFD	R102	100K OHM
	C106		50 MFD	R103	330 OHM
	C107		150 MFD	R104	1K OHM
	C108		2.7 MFD	R105	10K OHM
	C109		.15 MFD	R106	100K OHM
	C110		.005 MFD	R107	10 OHM
	C111		.005 MFD	R108	2.2K OHM
	C112		.02 MFD	R109	15K OHM
	C113		.02 MFD	CR101
	C114		.022 MFD		3PDT 24 VDC
	C115		.022 MFD	SCR101	12A, 400V
	D101		16A	SCR102	12A, 400V
	D102		16A	Q101
	D103		16A		2N5655
	D104	}	1A 1000V	Q102	2N5655
	D105		1A 1000V	Q103	MPS A92
	D106		1A
	THRU
	D116		*	PT101	1:1:1 PULSE TRANS.
	DZ101		15V, 5W	TP101	TRANSIENT PROTECTOR
	DZ102		10V, 5W	TP102	TRANSIENT PROTECTOR
	* C105 AND PT101 PRIMARY ARE SHOWN IN SECTION					C

		CONTROL CIRCUIT
C201	.022 MFD	R204	1.00K OHM 1/4W 1%
C202	.022 MFD	R205	2.94K OHM 1/4W 1%
C203	18 MFD	R206	15K	OHM
C204	4.7 MFD	R207	10K	OHM
C205	.0033 MFD	R208	100K OHM TRIMMER
C206	.47 MFD	R209	33K	OHM
C207	18 MFD	R210	10K	OHM
C208	4 MFD	R211	5.6K OHM
C209	.047 MFD	R212	15K	OHM
C210	4.7 MFD	R213	47K	OHM
C211	.15 MFD	R214	15K	OHM
C212	.022 MFD	R215	100K OHM
C213	.022 MFD	R216	1K OHM
C214	4.7 MFD	R217	1K OHM
C215	18 MFD	R218	1K OHM
C216	100pf	R219	33K	OHM
C217		R220	50K	OHM TRIMMER
THRU	.022 MFD	R221	15K	OHM
C228	}	R222	10K	OHM TRIMMER
D201		R223	33K	OHM
		R224	100K OHM
THRU	1A.	R225	1K OHM
D206	}1A.	R226	10K OHM
D208		R227	6.8K OHM
DZ201		R228	10K	OHM
	6.8V.	R229	20K	OHM TRIMMER
R201		R230	27K	OHM
	1K OHM	R231	15 OHM
R202	270 OHM
R203	500 OHM TRIMMER

R232	100 OHM
R233	6.8K OHM
R234	2.7K OHM
R235	10K OHM
R236	15K OHM
R237	10K OHM
R238	1M OHM
R239	15K OHM
R240	5.6K OHM
R241	15K OHM
R242	560 OHM
R243	10 OHM
R244	270 OHM

X201 I.C. REGULATOR

X202 I.C. TACHOMETER

X203 I.C. QUAD OP-AMP

X204 I.C. QUAD OP-AMP

Q201 }

Q202 2N4123

Q203

Q204 2N4125

Q205 }

Q206 2N4123

Q207 2N5816

QU201 2N6027

	METER CIRCUIT
C401	500 MFD
C402	4.7 MFD
C403	27 MFD
C404	}
C406	.022 MFD
C407	}
D401
THRU	1A
D404
X401	VOLTAGE REGULATOR

DM401 DIGITAL METER

R401 24.3K OHM 1/4W 1%

R402 2K OHM TRIMMER

R403 2.80K OHM 1/4W 1%

R406 7.68K OHM 1/4W 1%

R407 1K OHM TRIMMER

R408 102K OHM 1/4W 1%

R409 10K OHM TRIMMER

FOR VOLTMETER P.C. BOARDS

L6687-1 OR HIGHER USE S21145 SCHEMATIC FOR COMPONENT VALUES AND CIRCUIT CONNECTIONS.

VOLTAGE CIRCUIT

COMPONENTS NOT ON P.C. BOARD

KEY TO SYMBOLS

FOR VOLTAGE P.C. BOARDS L6084-4 OR HIGHER USE L8388 SCHEMATIC FOR COMPONENT

COMPONENTS

CIRCUIT

ELECTRICAL SYMBOLS PER E1537

VALUES AND CIRCUIT CONNECTIONS.

1 /8 AMP FAST

R517

R1

2 OHM 50W

A

INPUT CABLE CONNECTION

C501

.1 MFD

F501

1K OHM

R2

10K OHM 2W POT.

C

C502

.005 MFD

BLOW FUSE

R518

270 OHM

R3

10K OHM 2W POT.

E

POWER OR SIGNAL SOURCE POINT

C503

4.7 MFD

R519

100K OHM

R4

22K OHM

F

OCI501

OPTO-ISOLATOR

C504

4.0 MFD

R520

15K OHM

R5

0.1 OHM

F

REMOVABLE CONNECTION

C505

.47 MFD

Q501

2N4123

R521

56K OHM

C506

.022 MFD

R522

330K OHM

CR2

WELD CURRENT-

Q502

2N4857

COMMON CONNECTION

C507

.022 MFD

R523

22K OHM

REED SWITCH

B

Q503

MPSA42

C508

39 MFD

R524

4.7K OHM

CR4

G.L.P. REED SWITCH

F

C509

.022 MFD

X501

I.C. QUAD OP-AMP

R525

4.7K OHM

A THRU G SOURCE POINT CIRCUIT LOCATION

C510

1.8 MFD

R526

22K OHM

S1

SPST TRIGGER SWITCH

D

X502

I.C. QUAD OP-AMP

C511

.022 MFD

R527

22K OHM

DPDT

HOT-COLD

S2

B & D

C512

4.7 MFD

TP501

TRANSIENT

R528

22K OHM

CENT. OFF

INTERLOCK SWITCH

E

C513

27 MFD

R529

2.2K OHM

S3

DPDT POLARITY SWITCH

PROTECTOR

C514

.022 MFD

R530

27K OHM

S4

SPST G.L.P. RESET SWITCH

F

C515

1 MFD

R501

44.2K OHM 1/4W 1%

R531

100K OHM

S5

DPDT SET-ACTUAL SWITCH

G

SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT

LEAD COLOR CODING

C516

.022 MFD

R532

27K OHM

S6

3 POLE VOLTS-SPEED SELECTOR SWITCH

G

R502

500 OHM TRIMMER

BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGEABILITY

C517

.47 MFD

R533

10K OHM

S7

DPDT DIRECTION SWITCH

A

B - BLACK

R503

4.75K OHM 1/4W 1%

OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT SHOW THE EXACT

C518

}

39 MFD

R504

100K OHM

R534

100 OHM

R - RED

C519

R535

1K OHM

T1

POWER SUPPLY TRANSFORMER

B

R505

27K OHM

COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON

THRU

.022 MFD

R536

270 OHM

T2

TRIGGER SUPPLY TRANSFORMER

D

U - BLUE

R506

15K OHM

CODE NUMBER.

C522

R507

10K OHM

R537

33K OHM

W - WHITE

R538

56K OHM

TP1

150VAC TRANSIENT PROTECTOR

A

CR501

S.P.D.T. 24VDC

R508

2.2K OHM

R539

27K OHM

R509

2.7MEG OHM

D501

}

R540

5K OHM TRIMMER

R510

4.7K OHM

R541

2K OHM TRIMMER

THRU

1 AMP

R511

100K OHM

R542

5.6K OHM

D518

R512

1K OHM

THIS SHEET CONTAINS PROPRIETARY INFORMATION

UNLESS OTHERWISE SPECIFIED TOLERANCE

EQUIP.

LN-9 AND LN-9F (METRIC)

R513

2.7MEG OHM

D509 AND CR501 N.C.

OWNED BY THE LINCOLN ELECTRIC CO. AND IS

ON HOLE SIZES PER E2056

3-25-94A

THE LINCOLN ELECTRIC CO. TYPE

DZ501

20V, 1W

R514

5.6K OHM

NOT TO BE REPRODUCED, DISCLOSED OR USED

ON 2 PLACE DECIMALS IS

.02

8-2-96B

CLEVELAND, OHIO U.S.A.

OPERATING SCHEMATIC

ON 3 PLACE DECIMALS IS

.002

SUBJECT

DZ502

15V, 1W

R515

1.8K OHM

CONTACTS ARE SHOWN

WITHOUT THE EXPRESS PERMISSION OF

ON ALL ANGLES IS .5 OF A DEGREE

SCALE NONE

SHT.

G 1702

DZ503

5.1V

R516

100K OHM

IN SECTION B

THE LINCOLN ELECTRIC CO.

MATERIAL TOLERANCE t(" ") TO AGREE

REF.

G1590

6-14-85

DR

FI

DATE

11-1-96

CHK

SUP'S'D'G

WITH PUBLISHED STANDARDS.

NO.

NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.

LN-9