Lincoln Electric SVM138-A service manual Operating Schematic, 525 B

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G-10		ELECTRICAL DIAGRAMS	G-10
Operating Schematic
1763	G
	A INPUT AND MOTOR POWER CIRCUIT	B CONTROL POWER SUPPLY AND RELAY CIRCUIT	C MOTOR CONTROL CIRCUIT

525B

32

3A CIRCUIT BREAKER

628

529

B 628

32A

S7

628

CR2

C109

525

525 B

DIRCTION

Q207

520

B

7A 7

32A

C102

C103

FWD

(B)

R108

R109

D116 530

D110

R103

Q103

+

3

R221

R230

REV.

12 10

+10.00 V.

F101

CR101

SWITCH

532

D108

C113

CR101

C204

11

R203

541B

D104

D105

R110

2

525

B

C221

J

C209

32A

541

R101

D109

3

C

Q

1

R113

A

R102

R104

R105

R201

C202

R203R204

+

X202

R211

631

11

C218

5

+

7

R238

1

C219

R239

R229

R233

R235

R236

R209

5

C212

3 +

Q101

6

C217

525

C116

R111

C117

D111

D112

4

GAS

PTCR101

P.M.

526

C106 526

+15V

Q104

D117

X201

REF

9

8

2

-

X203

512 R217

C208

CW

LO

SOLENOID

4

10

PT

D103

ARM

C108

14

500

5

A

R244

6

-

2

-

4

X204

101

101

26 VAC

Q105

D113

CW

11

3

+

1

D

A

D206

TP

SCR101

SCR102

527

527

5

D

X101

Q

2

522

524A

D114

13

1

CW

WIRE SPEED

B

500

-

X203

K

R222

CW

115 VAC

602

ZERO

6

S

R

C115

R106

R205

C203

R206

R207

C205

C206

3

R208R246

R210

R242 R2

CONTROL

R226

Q203

C228

CR101

INTERLOCK

C215

101 C101

539

+

DZ101

4

7

12

2

4

X203

H1

C224

C105

(W)

R112

ON

524

C216

632

-

511

C210

+

D101

C107

7

8 9 10

11

CR501

C201

633

13

B

R202

R218

C220

C104

D102

601

510

+

CW

12

+

14

500

Q204

530A

539B

530B

OFF

D119

+

C213

B

9.6 VAC

CAL

TRIGGER

531

T1

VOLT

C114

521

+

512

R231

REFERENCE

D120

D

+

R212

R214

D106

D107

530

C111

C

C223

M

R1

DZ102

Q102

C214

525

R241 R240

-

-

31

S2A

621

RHEOSTAT PLUG

S2b

500

D

C110

R107

X1

C

R213

9

R220R219

ACC

9

8

D204

R225

D208

540

R245

555

31

HOT COLD

B

510A

10

+

C

10

+

B

QU201

DZ203

115 VAC 531

500 -10V

SWITCH

X203

PIN

PIN

X204

32A

RING

(R)

525

F

S

C211

C225

7A

T2

B

4

MAGNET

D205

24 VAC

511

CW

620

TO CONTROL

L

Q205

9

7

(Y)

3

31

HOT-COLD

D202

Q201

11

524A

(B)

INTERLOCK SWITCH

R533

A

HALL EFFECT

DZ202

B

623

R215

R216

+

R224

R227

R228

R232

R234

R237

7

524

4

B 500

MODULE

HOT

620

621

B

C207

C112

Q206

2

2A

COLD

TRIGGER

C226

DZ201

HOT

B 530

BOARD

622

TRIGGER

525

R534

B

CR101

530

622

SWITCH

Q202

PT

6

504

2

500

623

D201

+

101

C227

1

5

5

D203

C222

OCI

C229

10

628

B

501

12

500

B

D

TRIGGER CIRCUIT

12

2

6

4

500

GMA TIMER AND BURNBACK TIMER

525

C507

+

B

14

C509

RECEPTACLE (SHOWN WITH JUMPER

B

C503

R506

PIN F

C508

+

Q501

R513

PLUG INSTALLED)

+

WHITE

R510

13

-

D

524A

X502

67

667

C520

500

PIN S

D517

DZ

A

R501

510B

B

SWITCH

TP

13

2

A

+ R509

R511

CW

R541

R540

R538

501

525

S5

E

E

501

A

511

512

C

514

515

S3

4

START

GAIN

B

SET

ACTUAL

POLARITY

-

R535

R507

-

C518

C

14

721

R502

CW

12 +

X501

3

+

X502

1

CW

525

D514

CR

R526

R528

S6

C3 513

C1

C2

NEG

POS

CAL

11

PIN A

B

501

516

R503

D502

C521

B

E

R542

R512

+

10

C515

560

519

M/MIN

LO

8

IN./MIN.

510

517

C502

C501

525

667

BLUE

X502

561

9

10

1 2

4

HI

5

6 7

VOLTS

500

D506

11

3

F501

B 510B

6

B

7

R536

R537

R539

R532

2

-

C506

+

PIN B

R520

R522

5

4

C511

R524

B

C

9

R529

R408

R406

R404

R401

518

518

R504

1

D513

-

C407

C406

C405

C404

510B

X501

515

C512

562

-

D510

5

+

C519

D503

D516

3

+

D

+

7

R530

D518

CR501

R527

CW

CW

CW

R402

CW

A

1

+5V

C505

+

-

11 X502

C504

X501

D505

S

D

B

DZ502

533

R409

R407

R405

3

TP5

510B

522

R505

Q502

R519

D511

R521

R523

6

C522

R531

Q503

C514

CR4

R4

TP4

DM401

X401

C

D501

DZ503

B

G

D512

4

2

IN

D402

21

D504

525

D515

534

R403

+

GND

B

R508

+

S4

+ C403

E

C

D401

530A

+

601

B

521A

D507

500

C513

B

G.L.P. RESET

C402

602

D509

SHUTDOWN

C401

B

B

525

521 500

R516

BYPASS TABS

520

VOLTAGE P.C. BOARD RECEPTACLE

D403

D404

R514

B

500

510C

510

FOR OPTIONAL PULSED POWER

FILTER P.C. BOARD PLUG

+

B

510A

510B

(SHOWN WITH JUMPER PLUG

1

4 3

2

634

R517

X501

INSTALLED)

9

-

C517

CW

R518

"VOLTS"

R3

10

C

8

D508

+

514

GND

CONTROL

635

636

+

500

521A

C510

R515

C516

B

E

510B

E

VOLTAGE CONTROL CIRCUIT

F

SHUTDOWN CIRCUIT

G

METER CIRCUIT

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		POWER CIRCUIT				FOR POWER BOARDS
	C101	.005/1400		D117	1A	L7265-3 OR HIGHER USE
	C102	.047/100		D119	1A	SCHEMATIC L8871.
	C103	.047/100		D120	.15A
	C104	.005/1400		F101
	C105	.005/1400			4/10 SLOW BLOW FUSE
	C106	.15/200		R101	330 OHM
	C107	150/50		R102	10 OHM
	C108	.022/25		R103	2.2K OHM
	C109	.022/25		R104	15K OHM
	C110	.022/25		R105	1K OHM
*	C111	2.7/50		R106	10K OHM
	C112	.01/100		R107	100K OHM
	C113	.022/25		R108	22K OHM
	C114	.022/25		R109	47K OHM
	C115	.022/25		R110	22K OHM
	C116	.022/25		R111	15K OHM
	C117	.15/200		R112	15K OHM
	D101	16A		R113	100 OHM
	D102	16A		CR101	3PDT 24 VDC
	D103	16A		SCR101	12A, 400V
	D104	1A		SCR102	12A, 400V
	THRU			Q101	2N5655
	D108			Q102	2N5655
	D109	.15A		Q103	MPS A92
	D110	1A		Q104	2N4125
	D111	1A	*	Q105	BS170
	D112	.15A		PT101	1:1:1 PULSE TRANS.
	D113	1A		TP101	TRANSIENT PROTECTOR
	D114	1A		X101	I.C. DUAL "D" FLIP FLOP
	D116	.15A		DZ101	15V, 5W
				DZ102	10V, 5W
	* C112 AND PT101 PRIMARY ARE SHOWN IN SECTION						C

		CONTROL CIRCUIT
C201	.022/25	R208	100K OHM TRIMMER		FOR P.M. CONTROL BOARDS
C202	.022/25	R209	33K	OHM	L10068-1 OR HIGHER USE
C203	18/15	R210	10K	OHM	SCHEMATIC L10069.
C204	4.7/35	R211	5.6K OHM
C205	.0033/200	R212	15K	OHM
C206	.33/50	R213	47K	OHM
C207	18/15	R214	15K	OHM
C208	4/50	R215	100K OHM
C209	.04/100	R216	1K OHM		R239	15K OHM
C210	2.7/50	R217	1K OHM		R240	5.6K OHM
C211	.15/200	R218	1K OHM		R241	15K OHM
C212	.022/25	R219	33K	OHM	R242	560 OHM
C213	.022/25	R220	50K	OHM TRIMMER	R243	10 OHM
C214	4.7/35	R221	15K	OHM	R244	270 OHM
C215	18/15	R222	10K	OHM TRIMMER	R245	10K OHM
C216	100pf/100	R223	33K	OHM	R246	68.1K OHM
C217		R224	100K OHM		X201	I.C. REGULATOR
THRU	.022/25	R225	1K OHM		X202	I.C. F/V CONVERTER
C228		R226	13.7K OHM		X203	I.C. QUAD OP-AMP
C229	.47/50	R227	6.8K OHM		X204	I.C. QUAD OP-AMP
D201		R228	10K	OHM	Q201
THRU	1A.	R229	10K	OHM TRIMMER	Q202	2N4123
D206		R230	22K	OHM	Q203
D208	1A.	R231	15 OHM		Q204	2N4125
R201	1K OHM	R232	100 OHM		Q205	BS170
R202	270 OHM	R233	6.8K OHM		Q206	2N4123
R203	500 OHM TRIMMER	R234	2.7K OHM		Q207	2N5816
R204	1.00K OHM 1/4W 1%	R235	10K	OHM	QU201	2N6027
R205	2.94K OHM 1/4W 1%	R236	15K	OHM	DZ201	6.8V.
R206	15K OHM	R237	10K	OHM	DZ202	16.0V.
R207	10K OHM	R238	1M OHM		DZ203	3.0V.

	METER CIRCUIT
C401	500 MFD
C402	4.7 MFD
C403	27 MFD
C404
THRU	.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%
R404	13.7K OHM 1/4W 1%
R405	2K OHM TRIMMER
R406	3.74K OHM 1/4W 1%
R407	500 OHM TRIMMER
R408	61.9K OHM 1/4W 1%
R409	5K OHM TRIMMER

FOR VOLTMETER P.C. BOARDS

L6688-1 OR HIGHER USE S21146 SCHEMATIC FOR COMPONENT VALUES AND CIRCUIT CONNECTIONS.

VOLTAGE CIRCUIT

COMPONENTS NOT ON P.C. BOARD

KEY TO SYMBOLS

NOTES

C501

.1/100

Q501

2N4123

R525

4.7K OHM

COMPONENTS

CIRCUIT

ELECTRICAL SYMBOLS PER E1537

C502

.005/1400

Q502

2N4857

R526

22K OHM

R1

2 OHM 50W

A

INPUT CABLE CONNECTION

C503

4.7/35

Q503

MPSA42

R527

22K OHM

R2

10K OHM 2W POT.

C

CAPACITORS = MFD/VOLTS

*

C504

4.0/50

X501

I.C. QUAD OP-AMP

R528

22K OHM

R3

10K OHM 2W POT.

E

POWER OR SIGNAL SOURCE POINT

RESISTORS

= OHMS/WATTS

C505

.47/50

X502

I.C. QUAD OP-AMP

R529

2.2K OHM

R4

22K OHM

F

* 1 /2 WATT UNLESS OTHERWISE

C506

.022/25

TP501

TRANSIENT

R530

27K OHM

CR2

WELD CURRENT-

B

REMOVABLE CONNECTION

C507

.022/25

PROTECTOR

R531

100K OHM

REED SWITCH

SPECIFIED.

C508

39/20

R501

44.2K OHM 1/4W 1%

R532

27K OHM

CR4

G.L.P. REED SWITCH

F

COMMON CONNECTION

OP - AMP = LM 224

C509

.022/25

R502

500 OHM TRIMMER

R533

10K OHM

S1

SPST TRIGGER SWITCH

D

C510

1.8/20

R503

4.75K OHM 1/4W 1%

R534

100 OHM

S2

DPDT

HOT-COLD

B & D

REGULATOR = LM 723

C511

.022/25

R504

100K OHM

R535

1K OHM

CENT. OFF

INTERLOCK SWITCH

F/V CONVERTER = LM 2907

A

THRU

G

SOURCE POINT CIRCUIT LOCATION

C512

4.7/35

R505

27K OHM

R536

270 OHM

S3

DPDT POLARITY SWITCH

E

C513

27/35

R506

15K OHM

R537

33K OHM

S4

SPST G.L.P. RESET SWITCH

F

DUAL "D" FLIP FLOP = MC14013B

C514

.022/50

R507

10K OHM

R538

56K OHM

S5

DPDT SET-ACTUAL SWITCH

G

J

THRU

M

TEST POINTS

C515

1/35

R508

2.2K OHM

R539

27K OHM

S6

3 POLE VOLTS-SPEED SELECTOR SWITCH

G

C516

.022/25

R509

2.7MEG OHM

R540

5K OHM TRIMMER

S7

DPDT DIRECTION SWITCH

A

C517

.47/50

R510

4.7K OHM

R541

2K OHM TRIMMER

T1

POWER SUPPLY TRANSFORMER

B

SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT

LEAD COLOR CODING

C518

39/20

R511

100K OHM

R542

5.6K OHM

T2

TRIGGER SUPPLY TRANSFORMER

D

BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGEABILITY

C519

R512

1K OHM

D509 NOT USED FOR

X1

HALL EFFECT MODULE

B

B - BLACK

THRU

.022/25

R513

2.7MEG OHM

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

R - RED

C522

R514

5.6K OHM

GMA MODELS

COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON

CR501

S.P.D.T. 24VDC

R515

1.8K OHM

U - BLUE

CODE NUMBER.

D501

R516

100K OHM

CR501 N.C. CONTACT ARE

W - WHITE

THRU

1 AMP

R517

1K OHM

SHOWN IN SECTION

B

D518

R518

270 OHM

DZ501

20V, 1W

R519

100K OHM

DZ502

15V, 1W

R520

15K OHM

DZ503

5.1V

R521

56K OHM

FOR VOLTAGE P.C. BOARDS

THIS SHEET CONTAINS PROPRIETARY INFORMATION

UNLESS OTHERWISE SPECIFIED TOLERANCE

6-7-96A

EQUIP.

LN-9 GMA AND LN-9F GMA

F501

1 /8 AMP FAST

R522

330K OHM

L6084-4 OR HIGHER USE L8388

OWNED BY THE LINCOLN ELECTRIC CO. AND IS

ON HOLE SIZES PER E2056

12-21-89C

8-2-96B

THE LINCOLN ELECTRIC CO. TYPE

BLOW FUSE

R523

22K OHM

ON 2 PLACE DECIMALS IS

.02

SCHEMATIC FOR COMPONENT

NOT TO BE REPRODUCED, DISCLOSED OR USED

11-9-90D

CLEVELAND, OHIO U.S.A.

OPERATING SCHEMATIC

OCI501

OPTO-ISOLATOR

R524

4.7K OHM

WITHOUT THE EXPRESS PERMISSION OF

ON 3 PLACE DECIMALS IS

.002

11-1-91A

SUBJECT

VALUES AND CIRCUIT

ON ALL ANGLES IS .5 OF A DEGREE

SCALE NONE

SHT.

MATERIAL TOLERANCE t(" ") TO AGREE

1-21-94H

CONNECTIONS.

THE LINCOLN ELECTRIC CO.

WITH PUBLISHED STANDARDS.

3-25-94A

DR

DAD

DATE

6-25-92

CHK

REF.

SUPÕSÕDÕG

6-26-86

NO. G 1763

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	LN-9 GMA
in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the machine.