Lincoln Electric IM702-A manual Precision TIG 275 Wiring Diagram for Code

PRECISION TIG 275 WIRING DIAGRAM FOR CODE: 10806

CONTROL PANEL (VIEWED FROM REAR)

F-1

				306	1				1	301
				303	2				2	304B
					3	METER			3
					4				4	302
					5				5
					6				6
					(VIEWED FROM REAR)
											L5
				MINIMUM						N.E.
				OUTPUT		DISPLAY
				R4
				314	320	321	316C	316B	315
	316C					316B	313B
STICK		BALANCE	313C	LOCAL			MAXIMUM			POST FLOW
							OUTPUT
		R2					R1				R3
TIG				REMOTE		316A					313A
MODE	319				317					316A
											318

	301	1
304B	302	2	J8
	304	4
	303	3
	304A	5
	306	6

311 1

L6 312 2

313 3 314 4

315 5

316 6 J9

317 7

318 8 319 9 32010

32111

32212

CONTROL PC BOARD

1 W 221

J6 2 R 222

L4

L12

1 G1

2 G3

3

4 G4

5 G2

J46 217

7 220

216

X1

218	SCR1	R222 W221
	POS
G1	(+)
G2	SCR2
		L1

		L1 (U)			H1				460 VOLT CONNECTION
		L2 (V)							CONNECT STRAP TO
				S1					HIGH (H4) (AS SHOWN)
									230 VOLT CONNECTION
			POWER SWITCH
									CONNECT STRAP TO
		H4	H3	H2					MID (H3)
					A
	L1 (U)					C1			208 VOLT CONNECTION
			MID						CONNECT STRAP TO
	C5
		HIGH		LOW		251			LOW (H2)
	C4
				250		C2	H1
	L2 (V)
			COM
					POWER FACTOR
	GROUND	RECONNECT PANEL
					CAPACITORS
					(OPTIONAL)
								S	X5	267
					H2 (208V)			63.5VAC
	TO GROUND PER				H3 (230V)			F	X6	268
	NATIONAL				H4 (460V)			S	X3	231
	ELECTRICAL CODE				201	X9	S	115VAC		231A
						18VAC		F	X4	232
					204		F
						X10
								S X1
					W209	X7	S	78VAC
						20VAC
					R210		F
						X8		F
									X2
							T1
POLARITY SWITCH	MICRO SWITCH
AC A-C, D-E, B-F	OPEN

311A 322 311A 311

8

DC+ B-D, C-E, A-F, G-H CLOSED

PRECISION

				316		312			313
	(STICK)	(AUTO BAL)		(REMOTE)		(P. FLOW)		(THERMAL)
+ R -		+ G -		+ G -		+ G -		+	Y	-
B	W	B	W	B	W	B	W	B		W
	331		332	333		334			335

331	W	1
	B	6
332	W	2
	B	7
333	W	3	J10
	B	8
334	W	4
	B	9
335	W	5
	B	10

L7

13

2 J7

N.D.

N.C.

9 218

10216

1	252
9	253
2	269
10	270
3	271
11	220B

217

G3

220

220A

G4

B

SCR3

)-( D1

SCR4

NEG

FRONT GANG
D
E	A
F
C
POS
B	X2

		S2
252	POLARITY		253
	SWITCH

DC- B-D, A-E, C-F, G-H

CLOSED

232

115VAC

D2

REAR GANG

MICRO-SWITCH

CB1

C8

S2A

NO

C9

H

15A

NC

233

231

NEG

G

233B

266A

4

8

286

265A

0

1

233A

N.F.

CR4

2

6

262

CR4

265

266

263

234

SV2

(REAR VIEW, SHOWN

WATER VALVE

(OPTIONAL)

IN AC POSITION)

TIG 275

			ADVANCED CONTROL PANEL
						(OPTIONAL)
FREQ			ON TIME			BACKGROUND			DOWN SLOPE
	R9		R10			R11			R12
			401C
401B	402	403	401D	405	406	408	409	410	407	401D
4-STEP			401B	ON			(PULSE ON)
							-	+

5

46

L10

J3

1 2 3 4 5 6 7 8 9 10

OR N.C.

J3

1 2 3 4 5 6 7 8 9 10

401	1	PCB
402	2
403	3
404	4
405	5

	6	265
J11	12	266
	5	262
	13	263
	4	213
	14	214
	7	201	L13
	15	204
	8	W209
	16	R210

R7	271A	BACKGROUND
		RECTIFIER	R8
	271	269		267
				268
	270		262
			263
			201
	220B		204
			W209
	220A		R210

C1,C2	POWER FACTOR CAPACITORS, 50/460 (OPTIONAL)
C4,C5	BY-PASS CAPACITORS, .0047
C6	HIGH VOLTAGE CAPACITOR, .0015/12kV
C7	PHASE SHIFT CAPACITOR, 15uF/250VAC
C8,C9	HIGH FREQ PROTECTION CAPACITORS, .22/400
CB1	CIRCUIT BREAKER, 15 AMP
CR4	12V DC RELAY COIL
D1	FREE WHEELING DIODE
D2	BACKGROUND DIODE
L1	OUTPUT INDUCTOR (CHOKE)
L2,L3	HIGH FREQ INDUCTORS
L4 -L13	RF TOROID CHOKES
R1	OUTPUT CONTROL POTENTIOMETER, 10K
R2	BALANCE CONTROL POTENTIOMETER, 10K
R3	POST FLOW POTENTIOMETER, 10K
R4	MIN OUTPUT POTENTIOMETER, 10K
R5	PHASE SHIFT RESISTOR, 200/100
R6	HOLDING RESISTOR, 50/225

		401A		G	B
	401			W
411			OFF	404
	2-STEP
	TRIGGER		PULSE

						PROTECTION PCB
	A	A
	B	B
	C	C	L8	A	4
	D	D		B	1		J23
				C	2	J22
10K A-B	E	E
				D	3
AT MINIMUM	F	F		E	6
OPTIONAL				F	5
		REMOTE
REMOTE
		RECEPTACLE
TM
AMPTROL

		1
		2
		3
		4	J5A
		5
		7
		6
		8
	L9
1		1
2		2
3		3
4		4	J5
5	N.A.	5
7		7
6		6
8		8

406	6	TIGOPTION (OPTIONAL)
407	7
408	8
409	9
410	10
411	11
W	12
	J1

1 2 3 4 5 6 7 8 9 10

J2

N.B.

					FAN						S
								233A	231A	C
				260		231E					BYPASS/
											STABILIZER
			233A								PC BOARD
			GAS VALVE		SV1
				235
					231D
				231E
										E	F
			L11
					S	L2	238	C6
	1	260		115VAC					T3		R6
	2				T2	SPARK
J12	3	235				GAP
	5
		236
	6									284	285
	4	233A				L3	239
				237	F
			236							FRONT	WORK
				R5	C7	ARC STARTER AS’BLY				ELECTRODE
				236B						REAR

214

213

TRANSFORMER

PRIMARY

THERMOSTAT TRANSFORMER

SECONDARY

THERMOSTAT

233A

231A

N.A. CONNECTION IS PIN TO PIN BETWEEN J23 AND J5. N.B. ROBOTIC INTERFACE CONNECTION.

N.C. REMOVE JUMPER PLUG IN J3 WHEN INSTALLING TIG OPTION PC BOARD.

N.D. DISCONNECT JUMPER LEAD BETWEEN PIN 1 AND PIN 2 IN J3 TO DOUBLE PREFLOW & POSTFLOW TIMES.

N.E. DISPLAY TOGGLE SHOWN IN MIN AMP POSITION. N.F. PLUGS INTO LOWER SWITCHED RECEPTACLE.

R7	RESISTOR, 20/100
R8	RESISTOR, 5/50
R9	FREQ CONTROL POTENTIOMETER, 10K
R10	ON TIME CONTROL POTENTIOMETER, 10K
R11	BACKGROUND POTENTIOMETER, 10K
R12	DOWN SLOPE POTENTIOMETER, 10K
S1	INPUT POWER SWITCH
S2	POLARITY SWITCH
S2A	MICROSWITCH ON POLARITY SWITCH
SCR1,2,3,4	MAIN POWER SCR’S
SV1	GAS SOLENOID VALVE, 115VAC
SV2	WATER SOLENOID VALVE, 115VAC (OPTIONAL)
T1	MAIN TRANSFORMER
T2	HIGH VOLTAGE TRANSFORMER
T3	HIGH FREQ TRANSFORMER
LEAD COLORING CODE:			COMPONENT VALUE
B-BLACK		U-BLUE	UNITS:
			RESISTORS:
G-GREEN		W-WHITE	OHMS/WATTS
O-ORANGE		Y-YELLOW	CAPACITORS:
R-RED			MFD/VOLTS
CONNECTOR PIN NUMBERS:
1 2 3		EXAMPLE: THIS IS PIN 7
		7 0F CONNECTOR J5
8	J5	14	1 2 3	8
		LATCH
VIEW OF CONNECTOR ON PC BOARD
ELECTRICAL SYMBOLS PER E1537.

ELECTRODE

B

G4031

NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The specific diagram for a particular code is pasted inside the machine on one of the enclosure panels. If the diagram is illegible, write to the Service Department for a replacement. Give the equipment code number..

WIRING DIAGRAM ENHANCED DIAGRAMS F-1