Lincoln Electric IM702-A manual Enhanced Diagrams

Models: IM702-A

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PRECISION TIG 275 WIRING DIAGRAM FOR CODE: 10893

F-3

CONTROL PANEL (VIEWED FROM REAR)

415 VOLT CONNECTION

 

 

CONNECT STRAP TO

 

 

HIGH (H4) (AS SHOWN)

 

 

380-400 VOLT CONNECTION

L1 (U)

H1

CONNECT STRAP TO

MID (H3)

 

 

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

 

301

1

304B

302

2

303

3

304

4

J8

CONTROL PC BOARD

 

 

 

 

 

 

 

 

220-230 VOLT CONNECTION

L2 (V)

 

S1

 

 

 

 

 

 

 

 

 

 

 

 

 

CONNECT STRAP TO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER SWITCH

 

 

 

 

 

 

PROTECTIVE BONDING CIRCUIT

 

 

 

 

LOW (H2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

220 VAC

 

 

 

 

 

 

 

220VAC

 

 

 

 

 

 

 

RECEPT.

 

 

H4

H3

H2

A

 

51

 

 

 

 

 

RECONNECT PANEL SUPPORT

 

 

 

 

L1 (U)

 

 

 

 

CB2

 

 

 

 

 

GND5

GND6

 

 

 

 

C1

 

50

 

GND1

 

GND-H

GND-H2

GND4

 

L1A

 

MID

 

 

 

5A

52

 

 

 

 

 

 

 

 

 

 

250

 

 

 

 

 

 

 

 

 

 

BYPASS

HIGH

 

LOW

 

 

 

 

 

 

 

 

 

 

 

 

 

PC BOARD

 

 

251

50A

 

 

CONTROL

CASE

T1

TO GROUND PER

CASE

115 VAC

GAS

L2A

 

 

 

C2

 

 

 

 

 

 

H1

 

 

 

PANEL

FRONT

TRANS.

NATIONAL

BACK

RECEPT.

VALVE

L2 (V)

 

COM

 

 

 

 

 

 

 

 

FOOT

ELECTRIC CODE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER FACTOR

 

 

 

 

 

 

 

 

 

 

 

 

GROUND

RECONNECT PANEL

 

 

 

 

 

 

 

 

 

 

 

 

CAPACITORS

 

S X5

267

 

 

 

 

 

 

 

 

 

 

 

 

 

(OPTIONAL)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H2 (220V)

 

63.5VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F

 

 

STICK

TIG

MODE

316C

319

BALANCE

R2

 

 

 

 

311A

322

313C

314

320

 

 

321

316C

316B

315

 

 

316B

 

313B

 

LOCAL

 

MAXIMUM

 

 

 

OUTPUT

 

 

 

 

 

 

 

 

 

 

R1

 

 

317

316

316A

311A

311

312

 

REMOTE

 

 

 

 

 

 

POST FLOW

R3

 

 

313A

316A

318

313

 

304A

5

 

306

6

L6

311

1

312

2

 

313

3

 

314

4

 

315

5

 

316

6

 

317

7

 

318

8

 

319

9

 

320

10

 

321

11

 

322

12

 

W

1

 

331

 

J9

 

 

 

 

 

 

 

 

 

 

 

H3 (380V)

 

 

X6

268

J6

1

W 221

 

 

 

 

 

TO GROUND PER

 

H4 (415V)

 

S

X3

231

2

R 222

 

 

 

 

 

NATIONAL

250

H5 (440V)

 

115VAC

231A

 

 

 

L4

 

 

 

 

ELECTRICAL CODE

 

201

X9

S

 

 

 

 

 

 

216

X1

 

 

 

 

 

 

18VAC

 

 

X4

232

 

 

 

 

 

 

 

 

 

 

204

F

 

105VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

X10

F

 

 

 

 

 

 

 

 

 

 

 

 

 

X14

52

 

 

L12

 

SCR1

 

 

 

 

 

 

 

 

 

 

G1

R222 W221

 

 

 

 

 

 

X7

 

S

X1

 

 

1

G1

(+)

 

 

 

 

 

W209

S

 

78VAC

 

 

218

POS

 

 

 

 

 

20VAC

 

 

 

 

2

G3

 

 

 

 

 

 

 

 

R210

X8

F

F

 

 

 

3

 

G2

 

 

 

 

 

 

 

 

X2

 

 

G4

 

 

 

 

 

 

 

 

 

 

 

4

 

SCR2

 

 

 

 

 

 

 

 

T1

 

 

 

J4

5

G2

 

L1

 

POLARITY SWITCH MICRO SWITCH

 

 

 

 

 

 

 

6

217

 

 

 

 

 

 

 

 

 

 

 

7

220

 

 

 

 

AC

A-C, D-E, B-F

OPEN

 

 

 

 

 

 

 

 

8

218

 

 

 

 

DC+

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

CLOSED

 

 

 

 

 

 

 

 

9

217

 

FRONT GANG

 

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

CLOSED

 

232

 

 

 

 

 

 

10

216

 

 

 

 

 

MICRO-SWITCH

 

 

 

115VAC

 

 

 

 

D

 

D2 REAR GANG

 

 

 

 

 

 

 

 

 

B

 

 

CB1

C8

 

 

 

C9

 

 

 

G3

 

 

 

 

S2A NO

 

15A

 

 

 

 

 

 

 

 

SCR3

E

A

 

H

NC

 

233

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WIRING

(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

 

 

 

 

ADVANCED CONTROL PANEL

 

 

 

 

 

 

 

 

(OPTIONAL)

 

 

 

 

 

FREQ

 

 

ON TIME

 

BACKGROUND

 

DOWN SLOPE

 

B

6

332

W

2

B

7

 

333

W

3

B

8

 

334

W

4

B

9

 

335

W

5

B

10

L7

 

 

 

 

1

 

 

3

 

 

2

 

 

5

 

 

4

 

 

6

J10

J7

N.D.

N.C.

J3

1 2 3 4 5 6 7 8 9 10

 

 

 

220

 

 

F

 

 

NEG

 

G

 

 

 

 

 

233B

231

 

 

 

)-(

 

C

 

 

 

 

 

266A

 

 

4

8

 

 

 

 

 

 

 

 

 

 

 

233ACR4

 

 

 

 

 

 

220A

 

 

 

286

 

 

265A

0 CR4 1

 

 

50A

 

 

 

D1

 

POS

 

 

 

 

 

 

 

 

SCR4

 

B

X2

 

 

 

2

6

 

 

1

252

G4

 

 

 

 

 

 

 

 

265

266

263

262

 

234

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

253

 

 

 

S2

 

 

 

 

 

 

 

 

 

SV2

 

2

269

 

NEG

 

POLARITY

 

253

 

(REAR VIEW, SHOWN

 

 

 

 

N.F.

WATER VALVE

 

10

270

 

252

SWITCH

 

 

 

 

 

 

 

(OPTIONAL)

 

 

 

 

IN AC POSITION)

 

 

 

 

 

 

 

3

271

 

 

 

 

 

 

 

 

 

 

 

 

11

220B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

265

 

 

 

 

 

 

 

 

 

 

 

 

C1,C2

 

POWER FACTOR CAPACITORS, 50/460 (OPTIONAL)

J11

12

266

 

 

 

 

 

 

 

 

 

 

 

 

C4,C5

 

BY-PASS CAPACITORS, .0047

5

262

 

 

 

 

 

 

 

R7

271A

BACKGROUND

 

C6

 

HIGH VOLTAGE CAPACITOR, .0015/12kV

 

13

263

 

 

 

 

 

 

 

 

 

RECTIFIER

 

C7

 

PHASE SHIFT CAPACITOR, 15uF/250VAC

 

 

 

 

 

 

 

 

 

 

269

R8

267

C8,C9

 

HIGH FREQ PROTECTION CAPACITORS, .22/400

 

4

213

 

 

 

 

 

 

 

 

271

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIAGRAM

PRECISION TIG 275

 

R9

 

 

R10

R11

 

R12

 

 

 

 

 

 

 

 

401C

 

 

 

 

 

 

 

 

 

 

 

 

 

401B

402

403

 

401D

405

406

408

409

410

 

407

401D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L10

 

 

4-STEP

401A

401B

ON

 

404

(PULSE ON)

 

 

 

 

 

 

 

 

411

 

401

 

 

-

G +

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W

 

 

 

 

 

 

 

 

 

 

2-STEP

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

TRIGGER

 

PULSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5 J5A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

PROTECTION PCB

 

L9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

B

 

 

 

 

 

 

 

 

1

 

1

 

 

 

 

C

 

C

 

 

L8

 

A

4

 

 

2

 

2

 

 

 

 

D

 

D

 

 

 

B

1

 

J23

3

 

3

 

 

 

 

 

 

 

 

 

C

2

J22

4

 

4

J5

 

 

 

E

 

E

 

 

 

 

 

10K A-B

 

 

 

 

 

 

 

D

3

 

 

5

N.A.

5

AT MINIMUM

 

 

F

 

F

 

 

 

 

E

6

 

 

7

 

7

 

OPTIONAL

 

 

 

 

 

 

 

F

5

 

 

6

 

6

 

 

REMOTE

 

 

 

 

 

 

 

8

 

8

 

REMOTE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TM

 

RECEPTACLE

 

 

 

 

 

 

 

 

 

 

 

AMPTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OR N.C.

J3

1 2 3 4 5 6 7 8 9 10

401

1

OPTIONTIG PCB (OPTIONAL)

402

2

403

3

W

12

404

4

 

405

5

 

406

6

 

407

7

 

408

8

 

409

9

 

410

10

 

411

11

 

 

J1

 

1 2 3 4 5 6 7 8 9 10

J2

N.B.

 

14

214

 

 

 

 

 

 

 

 

 

 

 

 

268

CB1

CIRCUIT BREAKER, 15 AMP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CB2

CIRCUIT BREAKER, 5 AMP

 

 

7

201

 

L13

 

 

 

 

 

 

 

 

270

 

262

CR4

12V DC RELAY COIL

 

 

 

15

204

 

 

 

 

 

 

 

 

 

 

263

D1

FREE WHEELING DIODE

 

 

8

W209

 

 

 

 

 

 

 

 

 

 

 

 

201

D2

BACKGROUND DIODE

 

 

 

16

R210

 

 

 

 

 

 

 

 

 

 

 

 

204

L1

OUTPUT INDUCTOR (CHOKE)

 

 

 

 

 

 

 

 

 

 

 

 

220B

 

L2,L3

HIGH FREQ INDUCTORS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W209

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L4 -L13

RF TOROID CHOKES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

220A

 

R210

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

214

 

 

R6

HOLDING RESISTOR, 50/225

 

 

 

 

 

 

FAN

 

 

 

 

 

 

S

 

 

 

R7

RESISTOR, 20/100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R8

RESISTOR, 5/50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

213

 

 

R9

FREQ CONTROL POTENTIOMETER, 10K

 

 

 

 

 

 

 

 

233A

231A

C

 

 

 

R10

ON TIME CONTROL POTENTIOMETER, 10K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRANSFORMER

 

 

R11

BACKGROUND POTENTIOMETER, 10K

 

 

 

 

 

 

 

231E

 

 

BYPASS/

PRIMARY

TRANSFORMER

 

R12

DOWN SLOPE POTENTIOMETER, 10K

 

 

 

 

 

 

 

 

 

THERMOSTAT

 

 

 

 

 

 

260

 

 

 

STABILIZER

 

SECONDARY

 

S1

INPUT POWER SWITCH

 

 

 

 

 

 

 

 

 

THERMOSTAT

 

S2

POLARITY SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PC BOARD

 

 

 

 

 

 

 

 

233A

 

 

 

 

 

 

 

 

 

 

 

S2A

MICROSWITCH ON POLARITY SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS VALVE

 

 

 

 

 

 

 

 

 

 

 

SCR1,2,3,4

MAIN POWER SCR’S

 

 

 

 

 

SV1

 

 

 

 

 

 

 

 

 

 

SV1

GAS SOLENOID VALVE, 115VAC

 

 

 

 

 

235

 

 

 

 

 

 

 

 

 

233A

SV2

WATER SOLENOID VALVE, 115VAC (OPTIONAL)

 

 

 

 

231D

 

 

 

 

 

 

 

 

 

T1

MAIN TRANSFORMER

 

 

 

 

 

 

231E

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E

F

 

 

231A

T2

HIGH VOLTAGE TRANSFORMER

 

 

 

 

L11

 

 

 

 

 

 

 

 

 

 

T3

HIGH FREQ TRANSFORMER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEAD COLORING CODE:

COMPONENT VALUE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNITS:

 

 

 

 

 

 

 

L2

238

C6

 

 

 

 

N.A. CONNECTION IS PIN TO PIN BETWEEN J23 AND J5.

B-BLACK

 

U-BLUE

RESISTORS:

 

1

 

 

 

S

 

 

 

 

 

N.B. ROBOTIC INTERFACE CONNECTION.

 

G-GREEN

 

W-WHITE

OHMS/WATTS

 

260

 

115VAC

 

 

 

 

 

T3

R6

N.C. REMOVE JUMPER PLUG IN J3 WHEN INSTALLING

O-ORANGE

Y-YELLOW

CAPACITORS:

 

2

 

T2

SPARK

 

 

 

R-RED

 

 

MFD/VOLTS

 

 

 

 

 

 

 

 

J12

3

235

 

 

GAP

 

 

 

 

 

 

TIG OPTION PC BOARD.

 

CONNECTOR PIN NUMBERS:

 

5

 

 

 

 

 

 

 

 

 

 

N.D. DISCONNECT JUMPER LEAD BETWEEN PIN 1 AND

 

 

236

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

 

284

285

 

 

EXAMPLE: THIS IS PIN 7

 

4

233A

 

 

 

 

 

 

 

 

PIN 2 IN J3 TO DOUBLE PREFLOW & POSTFLOW TIMES.

1 2 3

 

 

 

 

 

F

L3

239

 

 

 

 

 

N.E. DISPLAY TOGGLE SHOWN IN MIN AMP POSITION.

7 0F CONNECTOR J5

 

 

 

 

 

237

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FRONT

 

N.F. PLUGS INTO LOWER SWITCHED RECEPTACLE.

8

 

14

1 2 3

8

 

 

 

236

 

 

 

 

 

 

 

WORK

 

 

 

J5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LATCH

 

 

 

 

 

R5

C7

 

 

 

 

 

ELECTRODE

 

 

 

 

 

 

 

 

 

 

 

ARC STARTER AS’BLY

 

 

 

 

VIEW OF CONNECTOR ON PC BOARD

 

 

 

 

 

 

 

 

 

 

 

 

REAR

 

 

 

 

ELECTRICAL SYMBOLS PER E1537.

 

 

 

 

 

236B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ELECTRODE

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ENHANCED DIAGRAMS

G4031-2

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-3

Page 40
Image 40
Lincoln Electric IM702-A manual Enhanced Diagrams

IM702-A specifications

The Lincoln Electric IM702-A is a versatile and innovative welding machine that has garnered attention for its advanced features and robust performance. Designed for various welding applications, the IM702-A is a go-to choice for professionals in the industry, offering precision, reliability, and ease of use.

One of the standout characteristics of the IM702-A is its advanced inverter technology. This allows for a lightweight and compact design, making it easier to maneuver in tight spaces compared to traditional welding machines. The inverter technology also contributes to energy efficiency, reducing power consumption without compromising on performance.

The IM702-A features a multi-process capability, enabling it to perform MIG, TIG, and Stick welding with ease. This versatility makes it ideal for a wide range of projects, from industrial manufacturing to home repairs. Users can seamlessly switch between different welding processes, enhancing productivity and streamlining workflow.

In terms of user interface, the Lincoln Electric IM702-A is designed with convenience in mind. It boasts a digital display that provides real-time information on welding parameters, making it easier for operators to monitor and adjust settings as needed. The intuitive controls are user-friendly, allowing even novice welders to achieve professional-quality results.

The machine also includes advanced weld control features, such as precise amperage and voltage adjustments. These controls ensure that users can achieve optimal settings for different materials and thicknesses, resulting in clean, strong welds. Additionally, the IM702-A is equipped with an automatic voltage adjustment feature, which helps maintain consistent performance under varying input conditions.

Durability is another key selling point for the IM702-A. Built with high-quality materials and engineering, this welding machine is designed to withstand the rigors of daily use in demanding environments. Its rugged construction provides reliability and longevity, ensuring that it remains a valuable asset in any workshop.

Lastly, safety is a priority in the design of the IM702-A. It includes several built-in safety features, such as thermal overload protection and a stabilized arc performance that reduces the risk of arc blow, protecting both the operator and the equipment.

Overall, the Lincoln Electric IM702-A stands out in the welding market due to its advanced technologies, multi-process capabilities, user-friendly interface, and robust safety features, making it an excellent choice for professional welders seeking high-quality performance and versatility.