Lincoln Electric SVM118-A service manual Machine Schematic

TOC

TOC

G-3			ELECTRICAL DIAGRAMS	G-3
Machine Schematic
	2522	G

to Section

to Master

1J12	301	(+)5 V	301	2J7
		COMMON
2J12	302		302	4J7
		DATA
3J12	303		303	1J7
		CLOCK
4J12	304		304	3J7

			L8 THERMOSTAT
4J1	210	PRIMARY THERMOSTAT	TOROID
		PRIMARY THERMOSTAT
8J1	211
6J1	213	BACKGROUND RECTIFIER (+)
		BACKGROUND RECTIFIER (-)
5J1	214
			BRIDGE TOROID

PRIMARY

THERMOSTAT

-	BACKGROUND
	+ RECTIFIER

	MAIN
TRANSFORMER
	T1	C9	C10
X5		RECONNECT
	H4	PANEL	.0047/
		CR1
			3KV
X6	H3		L2

Return

Return

1J13	UNREG. TO (+) 5 V REGULATOR ON CONTROL BOARD
	UNREG. TO COMMON ON CONTROL BOARD
2J13
	(+) 15 V
3J13
	(-) 15 V
4J13
	PWR SUPPLY GND. TO CONTROL BRD. COMMON
5J13
	AC SYNC
6J13
	GAS (& WATER) VALVE CONTROL
8J13
	HIGH FREQ. CONTROL		*
9J13
	INTERLOCK CONTROL (OVER*	VOLTAGE SHUTDOWN) *
10J13
	PENETRATION SCR CONTROL
1J14
	CLEANING SCR CONTROL	*
2J14
3J14	SCR GROUND (TO GND ON*POWER BRD)
4J14	BACKGROUND COMMAND
	BACKGROUND GROUND
5J14
	DC OCV BOOST RELAY (CR3) CONTROL
6J14
	AC OCV BOOST RELAY (CR2) CONTROL *
7J14
			*
			*

1J2		2J1	G1	SCR1 GATE		G1
				SCR2 GATE
2J2		13J1	G2			G2
				SCR3 GATE
3J2		9J1	G3			G3
				SCR4 GATE
4J2	1	2J1	G4			G4
				B.G. TRANS.
5J2		7J1	264		R7	215
				MAIN RECT. AC
6J2		11J1	216		100/25	216
				MAIN RECT. AC
		1J1	217			217
				MAIN RECT. +
8J2		3J1	218			218
				BACKGROUND RESISTOR
9J2		14J1	212
10J2
1J5
2J5					T5
3J5		1J4	Y			7J17
4J5
5J5		2J4	Y		265	6J15
6J5		10J4	R		115V
7J5		4J4	U			6J17
		5J4	W
		6J4	U		266	7J15
		12J4	R	B
					CONTROL TRANSFORMER

214A	BACKGROUND RECTIFIER (-)
216A	MAIN RECTIFIER AC
G4	SCR4 GATE
	B.G. TRANSISTOR			Q1
214					SCR4		SCR1
	B.G. TRANSISTOR
215A
	SCR1 GATE			BACKGROUND TRANSISTOR
G1	MAIN RECTIFIER (-)				-	MAIN	+
220
	SCR2 GATE					RECTIFIER
G2					D1
219	MAIN RECTIFIER (+)
						SCR3
218A					150 /400
G3	SCR3 GATE						SCR2
	MAIN RECTIFIER AC
217A
			R3		D2
	CR3
256 AC OCV BOOST			8/ 100	10/	400
	258	CR2
					OUTPUT
						L3
					INDUCTOR
	CR2
255 DC OCV BOOST
	257	CR3
	115 VAC	232

OCV BOOST

RECTIFIER

+-

R8 8/300

CR2

CR3

DC

X1	H2				L1 }
X7
		CR1
X2	H1
					RECONNECT
					PANEL
		POWER
		FACTOR
		CORR.
		H1	H2	H3	H4
		T2			PILOT
					TRANSFORMER
	250
		X1			X2
	SEE NOTE A

Return to Section TOC

Return to Master TOC

1J9	B	24 VAC COMMON
		ELECTRODE SENSE
2J9
		REMOTE ARC START (TRIGGER) SWITCH 24 VAC
3J9
		REMOTE CURRENT CONTROL HI
5J9
		REMOTE CURRENT CONTROL WIPER
6J9
		REMOTE CURRENT CONTROL LO
7J9
		DC MODE SWITCH S1A 24 VAC
8J9
1J8	222	SHUNT (+)
		SHUNT (-)
2J8	221
2J10		2J19
1J10		1J19
11J10		11J19
12J10		12J19
9J10		9J19
8J10		8J19
7J10		7J19
6J10		6J19
5J10		5J19
4J10		4J19
3J10		3J19
15J10		15J19
10J10		10J19
14J10		14J19
13J10		13J19

8J20 7J20 6J20 5J20 4J20 3J20 2J20 1J20

		B			6J18
5J3	267	AC RELAY	267	5J15
		DC RELAY
6J3	268		268	4J15
		115 VAC TO TRIAC CIRCUITS
1J6	269		269	1J15	4J18
		115 V TO HIGH FREQ
1J3	270		270	10J1
		115 V TO VALVE(S)			8J18
3J3	271		271	2J15
		INTERLOCK
4J3	272		272	9J15
		INTERLOCK			7J18
2J3	273		273	8J15
		24 VAC OUT	B	1J16
		ELECTRODE SENSE			1J18
				2J16
		REMOTE ARC START 24 VAC
				3J16	5J18
		REMOTE POT HI		5J16
		REMOTE POT WIPER
				6J16
		REMOTE POT LO
				7J16
		DC MODE 24 VAC
				8J16

8J17

3J17

2J17

								L6
								SHUNT TOROID
CW	CW	CW	CW	CW	CW	CW	CW	CW
R15	R16	R14	R17	R18	R19	R20	R21	R22

223DC MODE 24 VAC

201POT HI

202POT WIPER

203*POTu LO

20424 VAC OUT

207 REMOTE ARC START

ELECTRODE

225 SENSE

241 INTERLOCK

242 INTERLOCK

222

221

	204C
2J23	4J22
3J23	1J22
4J23	2J22
7J23	3J22
8J23
5J23	6J22

SHUNT (+)

SHUNT (-)

REMOTE

RECEPTACLE

A	U			REMOTE	S1A
					DC -
B	N	R5	10K	CURRENT
				CONTROL

CR

D	B	REMOTE
E	W	ARC START	CLOSED
		SWITCH	IN DC

FNO CONNECTION

OPTIONAL REMOTE AMPTROLTM

AND ARC START SWITCH

L1

RF CHOKE

DC		AC
AC		AC
DC	+	+ -
		DC

50/ 100

R1

C1

R2

4/ 220

25/ 25

259263

AC

DC

POLARITY

SWITCH

S1

241

242

SHUNT 400A/50mV

L2

RF CHOKE

		SECONDARY
		THERMOSTAT
POWER START/	STOP
STOP PUSHBUTTON
	START
S2	CR1	PL1

CR1

INTERLOCK

NOTE A: LEAD #250 FROM POWER FACTOR CAPACITORS CONNECTS AS FOLLOWS, DEPENDING ON THE HIGHEST NAMEPLATE INPUT VOLTAGE:

HIGHEST NAMEPLATE

INPUT VOLTAGE:

		LEAD #250 CONNECTS TO "HIGH" TERMINAL ON
440 THRU 460		RECONNECT PANEL, ALONG WITH CORRECT LEAD
		FROM MAIN TRANSFORMER (T1)
480	AND HIGHER	LEAD #250 CONNECTS TO H5 LEAD OF
AND
400	AND LOWER	MAIN TRANSFORMER

448 447 446 445 444 443 442 441

PREFLOW	SPOT	START	START	PULSE	BACKGROUND	PULSE	CRATER	CRATER
	TIME				% PEAK			% PEAK

		HIGH	C3
			.0025/10KV
15/	220	VOLTAGE

TRANSFORMER

CW

261262

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

				5J21	4J21	3J21	2J21	1J21
		CW				CW	CW	CW
		R10				R12	R13	R11
		PEAK				AC	AFTER	STICK
		CURRENT				WAVE	FLOW	ARC
						BALANCE	TIME	FORCE
14J11	414					1J24
13J11	413					2J24
11J11	411
10J11	410
8J11	408
9J11	409
7J11	407
6J11	406
5J11	405
4J11	404
3J11	403
2J11	402
1J11	401
				LOCAL			ON	TIG
				REMOTE			OFF	STICK
12J11	412			S10			S15	S11
		REMOTE				SPOT		MODE
5J12	305	(+)15 V				305	8J601	4P602
		GAS & WATER
6J12	306	HIGH FREQ. *				306	7J601	5P602
7J12	307					307	6J601
		ARC ESTAB.*						EP602
8J12	308					308	5J601	DP602
9J12	309	START	*			309	1J601
		PEAK *						1P602
10J12	310					310	2J601	6P602
11J12	311	BACKGROUND				311	4J601	CP602
		*
12J12	312	CRATER FILL **				312	3J601	3P602

TIME

CURRENT

TIME

FREQ.

% ON

FADE OUT

CURRENT

CURRENT

4J17

10J17

AUTO

1J17

BALANCE

LED

9J17

5J17

CONTINUOUS

VOLTS

ON

START

ON

ON

4 STEP

AMPS

OFF

OFF

OFF

OFF

2 STEP

S14

S18

S13

S12

S16

S17

S19

DISPLAY

METER

START

HIGH

PULSE

CRATER

2 STEP/4 STEP

START CURRENT

DISPLAY

CURRENT

FREQ.

FILL

HIGH FREQ.

4J701

ARC ESTAB.*

5J701

START

*

*

EJ701

PEAK

DJ701

(OPTIONAL)

BACKGROUND

1J701

*

*

*

CRATER FILL

6J701

(+)15 V

CJ701

3J701

TS701

228	115V HF	C6		L4	R4
		R6		3/	25
				SPARK
	115V	150/ 100		GAP
232					T4
			T3	L5
					HIGH FREQ.
					TRANSFORMER
	GAS	SV1	SV2	WATER
	SOLENOID			SOLENOID
229	115V GAS
	( & WATER )
	CONTROL	0.5 A			ELECTRODE	WORK
233		F1
	115V
234	TRIAC 115V	F2
		1.5 A
	CHASSIS

CB1

115V/15A

FAN FAN

115VAC

RECEPTACLE

C7	C8
.22/400V	.22/400V

CW-DENOTES CLOCKWISE POSITION WHEN VIEWED FROM FRONT OF POTENTIOMETERS.

ALL LOGIC IS 15V UNLESS OTHERWISE SPECIFIED.

ELECTRICAL SYMBOLS PER E1537

COMPONENT VALUES:

CAPACITORS = MFD/VOLTS

RESISTORS = OHMS/WATTS

DIODES = AMPS/VOLTS

LEAD COLOR CODING

B=BLACK	U=BLUE
N=BROWN	W=WHITE
R=RED	Y=YELLOW

CONNECTOR PIN NUMBERS:		EXAMPLE: THIS PIN IN
1 2 1 2 3	8	CONNECTOR J102
		IS "6J102"
9	16	LATCH

X3

VIEW OF CONNECTOR ON PC BOARD

X4

5-14-93F

THE LINCOLN ELECTRIC CO.				EQUIP.		SQUARE WAVE TIG 355
				TYPE
	CLEVELAND, OHIO U.S.A.						MACHINE SCHEMATIC
	SCALE		NONE	SUBJECT
						G2113			SHT.	G 2522
DR JJJ		DATE 4-2-92CHK			REF.			SUP'S'D'G
									NO.

NOTE: This diagram is for reference only. It may not be totally applicable to every code covered by this manual.

8/98 SQUARE WAVE TIG 355