Lincoln Electric SVM132-A service manual Operating Schematic, 1CR Wire Feed Motor Field

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G-4	ELECTRICAL DIAGRAMS
OPERATING SCHEMATIC

75					CASE		METER KIT RECEPTACLE				N.A. JUMPER PLUG IS REMOVED AND CONNECTOR "B" IS PLUGGED INTO
	R20				GROUNDING						OPTIONAL BURNBACK P.C. BOARD. SEE S15123 FOR OPERATING
76					SCREW		GND 541 543	21	567	568	SCHEMATIC.
77		GND LEAD	THERMAL								N.B. RESISTOR USED ON CODES 9090 AND BELOW ONLY. FOR CODES
											ABOVE 9090 THE GROUNDING LEAD PROTECTOR CONNECTS
5 AMP CIRCUIT			CIRCUIT	D103	D104	R118
		PROTECTOR									DIRECTLY TO THE CASE GROUNDING SCREW.
BREAKER			BREAKERS
	32A	SWITCH		32A			R126				568

G-4

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32
	N.A.
5	32A
	531
4
	4
2
	504
3

6502

1 2

TO POWER SOURCE TO OPERATE CONTACTOR

2

1CR

504

4

GND LEAD PROTECTOR COIL

GND

.1

N.B.

TP201	C204 D203	525A	D205	523 536	R202		D201	1CR D202
		525		528
			TH1	S1		2CR
			524			529
								683

522

T1

526

C205

S2

R205

D204

1CR

C202

SCR 201

R206

R204

C201

682	S3
	627

C203	(W)	C206
R203	(R)
	626
	R201

F201

531

732A

1CR

WIRE

FEED

MOTOR FIELD

C107 C108

PT101 PT101

SCR101 SCR102

7

C109	D107
TP101

D105 D106

		R127
R123		DZ101
541			R111
(B)
		R105	R109
(U)
	C111		R108
C112			R107
		QU101
R106	PT101	C106	C105

R124

D101

R113

D102	R112
	R129
D113
C103

R125

D114

D108

539

R128

S

F

Q103

	D110
	D111
	C104	R121
R119	R120	R102

635

C113

	R116
Q101
R114	R115

D109

Q102

R122

D112

L101

B		S304
A		R309	PT301
R117				C303
	CV	VV
			C306
R103				C305
C101		Q302
			637
	R101		DZ302
	631
R9	C110				C304
632 R110	634	C102		R310

	R306
	R302
	R305
R307	R308

QU301

PT301 C302

DZ301

R303 C301

R301

Q301

R304

C307

D301

D302

D303

D304

TP301

567

TO

GUN

CABLE

LN-8

SHUNT

ARC

VOLTAGE

TO

POWER

SOURCE

R311 21

31 R4 531

CASE GROUNDING SCREW

539

VARIABLE VOLTAGE CONTROL CIRCUIT TO RIGHT OF THIS LINE. TO OPERATE LN-8 WHEN THIS CIRCUIT IS NOT INSTALLED IN UNIT,

CONTROL CIRCUIT (BOARD #1)
C101 1MFD	L101 5.6MH

RELAY CIRCUIT (BOARD #2)

C201 50MFD

POINT "A" TO "B" IS JUMPERED.

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C102	2MFD			Q101	2N4125
C103	39MFD ~10%			Q102	2N4123
C104	4.7MFD			Q103	2N5815
C105	.10MFD			QU101	2N6027
C106, C110,C111			.02 MFD	TP101	TRANSIENT PROTECTION
C112, C113				SCR101	12A 400V
C107, C108		.047MFD		SCR102	12A 400V

C109	.005MFD			PT101 1:1:1 PULSE TRANSFORMER
D101	1A.	R101	6.8K		R116	10K
D102	1A.	R102	2K	TRIMMER	R117	22K
D103	1A.	R103	10K		R118	4.7K		4W
D104	1A.	R105	4.7K		R119	27K
D105	16A.	R106	4.7K		R120	15K
D106	16A.	R107	15		R121	1.5K
D107	16A.	R108	33K		R122	10K
D108	1A.	R109	33K		R123	.25		7W
D109	1A.	R110	750		R124	1K	TRIMMER
D110	1A.	R111	50K	TRIMMER	R125	4.7K		4W
D111	1A.	R112	27K		R126	1K	TRIMMER
D112	1A.	R113	39K		R127	150
D113	1A.	R114	10K		R128	1K
D114	1A.	R115	68K		R129	15K
DZ101	20V.

C202	.02MFD
C203	50MFD
C204	.005MFD
C205	50MFD
C206	.005MFD
1CR	3PDT 24V.D.C.
D201	1A.
D202	1A.
D203	1A.
D204	1A.
D205	1A.
R201	40	12W
R202	100
R203	100K
R204	27
R205	4.7K
R206	1K
F201	1/2A 125V CR 250V
	SLOW BLOW FUSE
SCR201	4A 400V
TP201	TRANSIENT PROTECTION

VARIABLE VOLTAGE CIRCUIT (BOARD #3)

C301	2MFD	R301	6.8K
C302	.10MFD	R302	5.6K	(2%)
C303	.01MFD	R303	1K (2%)
C304	.047MFD	R304	3.9K	(2%)
C305	.01MFD	R305	3.3K
C306, C307	.02MFD	R306	4.7K	2W
D301	1A.	R307	100
D302	2A.	R308	5K	TRIMMER
D303	3A.	R309	15
D304	4A.	R310	47
DZ301	62V	R311	68
DZ302	10V	S304	POWER SOURCE
Q301	2N3393		SELECTOR SWITCH
Q302	2N4125	QU301	UJT
PT301	1:1:1 PULSE TRANSFORMER
TP301	TRANSIENT PROTECTION
ELECTRICAL SYMBOLS		LEAD COLOR CODING
PER E1537		B - BLACK		R - RED
		U - BLUE		W - WHITE

COMPONENTS NOT ON P.C. BOARD

R4	2	50W
R9	5K		2W POT.
R20	10K		2W POT.
T1	110-24V TRANSFORMER
2CR	REED SWITCH (ACTUATED BY WELDING CURRENT)
4CR	GROUNDING LEAD PROTECTOR
S1	SPST GUN SWITCH
S2	SPDT INTERLOCK SWITCH
S3	SPDT DIRECTION SWITCH

FOR CONTROL P.C. BOARDS L5767-1 AND HIGHER, USE M16802 SCHEMATIC FOR COMPONENT VALUES AND CIRCUIT CONNECTIONS

FOR VARIABLE VOLTAGE P.C. BOARD L5039-1 OR HIGHER, USE M16441 SCHEMATIC FOR COMPONENT VALUES AND CIRCUIT CONNECTIONS

SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE INTER- CHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE NUMBER.

12-3-92E

M14680

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.

LN-8