Lincoln Electric IM687 manual Wiring Diagram Square Wave TIG 175 PRO 208/ 230/ 1

WIRING DIAGRAM - SQUARE WAVE TIG 175 PRO (208/ 230/ 1/ 60)

F-1

VOLTAGE RECONNECTION

230 VOLT CONNECTION (AS SHOWN)

H1 and H3 TO POWER SWITCH.

H2 NOT CONNECTED; INSULATE.

208 VOLT CONNECTION

H1 and H2 TO POWER SWITCH.

H3 NOT CONNECTED: INSULATE.

C1 AND C2 MUST ALWAYS BE CONNECTED ACROSS POWER SWITCH.

INPUT PLUG

H2

H3 H1

C1 C2

POWER

SWITCH

L2 L1

W 221

R 222

)-(

220

SCR1

G1 217

SCR2

X2

115VAC

FAN

H3 (230V)

H2 (208V)

H1
209	W X3	S
	18VAC
		F
210	B X4
201	W X5
	18VAC
204	W X6
230	B X7
	115VAC
232	B X8

T1

SX1

78VAC

FX2

G2

L1

POLARITY SWITCH MICRO SWITCH

TO GROUND PER
NATIONAL ELECTRICAL CODE	SCR HEATSINK
	THERMOSTAT

L2

218

(+)

G3

SCR3

	AC	A-C, D-E, B-F	OPEN
	DC+	B-D, C-E, A-F, G-H	CLOSED
FRONT GANG	DC-	B-D, A-E, C-F, G-H	CLOSED
D	REAR GANG		MICRO-SWITCH
		H	S2A NO
E	A		NC

SQUARE WAVE TIG 175 PRO

CHOKE

THERMOSTAT

	(-)	(+)
G4 216 220 G3 G2 218 G1 217	222R	221W
			314

313

J1J2

J3

312

244

311

242

J4

241

233

275

231

276

243

277

TOROID

	POWER "ON" LIGHT
231	W
233	PL1
	CURRENT CONTROL
	R1

277

276

275

STICK

	S3
243	MODE SWITCH
	( STICK - CLOSED
244	TIG - OPEN )

TIG

THERMAL LIGHT

216

G4

SCR4

)-(

D1

F	G
C		311	312
POS
B	X1
S2
POLARITY	(REAR VIEW,
SWITCH
	SHOWN IN AC POSITION)
R2
B	B
	C1,C2	BY-PASS CAPACITORS
	C3	HIGH VOLTAGE CAPACITOR, .0015/12kV
BYPASS/	C4	PHASE SHIFT CAPACITOR 15uF/250VAC
STABILIZER	D1	FREE WHEELING DIODE
PC BOARD	L1	OUTPUT INDUCTOR (CHOKE)
	L2	HI-FREQ PROTECTION CHOKE (TOROID)
	L3,L4	HI-FREQ INDUCTORS
	PL1	POWER "ON" LIGHT, 115VAC
	R1	CURRENT CONTROL POTENTIOMETER 10K
	R2	HOLDING RESISTOR 50/100
	R3	PHASE SHIFT RESISTOR 200/100
	S2A	MICROSWITCH ON POLARITY SWITCH

CONTROL PC BOARD

J6	E
	D

241	Y	-
+

242TL1

A A

S

115VAC T3

F

L3

SPARK

GAP

L4

C3

	SCR1,2,3,4	MAIN SCRs
	SV1	GAS SOLENOID, 115VAC
T4	T1	MAIN TRANSFORMER
	T3	HIGH VOLTAGE TRANSFORMER
	T4	HI-FREQ TRANSFORMER
	TL1	THERMAL LIGHT, LED
	LEAD COLORING CODE:		COMPONENT VALUE

WIRING DIAGRAM

									J5	F
										C
										A
										B
236	201	204	235	234	238	232	230	210	209

B	B
C	C
D	D
E	E	10K A-B
F	F	AT MINIMUM

237

R3 C4

236B

ARC STARTER AS’BLY

	B-BLACK	U-BLUE	UNITS:
			RESISTORS:
	G-GREEN	W-WHITE	OHMS/WATTS
	O-ORANGE	Y-YELLOW	CAPACITORS:
	R-RED		MFD/VOLTS
ELECTRODE	WORK

	REMOTE	REMOTE TM	OR	TIG
GAS VALVE	RECEPTACLE	AMPTROL		PULSER

238

SV1 236 236A

234 235

236A

CONNECTOR PIN NUMBERS:
				EXAMPLE: THIS IS PIN 7
1	2	3	7	0F CONNECTOR J4
8		J4	14
			LATCH
VIEW OF CONNECTOR ON PC BOARD
ELECTRICAL SYMBOLS PER E1537.
				1-00

L10060-1

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..

F-1