Lincoln Electric LF-72/74 service manual Normal Speed

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G-5

ELECTRICAL DIAGRAMS

G-5

WIRING DIAGRAM - ENTIRE MACHINE - CODE 11195, 11196, 11197, (L12484) LF-74

CAVITY NUMBERING SEQUENCE

GENERAL INFORMATION

(COMPONENT SIDE OF P.C. BOARD)

ELECTRICAL SYMBOLS PER E1537

577

WIRE FEED

1

1

2

1

3

3

SPEED

576

2

10K/2W

J3

J7

J2

COLOR CODE

1

CONTROL

2

3

4

4

6

BLACK

575

POTENTIOMETER

B -

1

4

1

8

W -

WHITE

N.C.

J5,J8

J1,J14

R -

RED

J9,J60

U -

BLUE

8

9

16

5

75A

1

75

77

REMOTE

CONTROL

3

10K/2W

76A

2

76

76

2

VOLTAGE

77A

3

77

1

POTENTIOMETER

75

(OPTIONAL)

NORMAL SPEED

N.C.

1

1

L2

4

552B

B

INPUT ELECTRODE

P7

N.B.

552

2

2

67

CABLE CONNECTION

A

3

3

551A

GAS

4

4

FEED

SOLENOID

N.E.

PLATE

P11

P4

553

TACH

R

POST-FLOW

BURNBACK

U

MOTOR /

J60

TIMER KIT

B

GEARBOX

(OPTIONAL)

1

2

3

4

5

6

7

8

552B

B W

601

515A

605

607

HIGH TORQUE

606A

608

1

1

521

BAFFLE

N.A.

B

MOUNTED

2

2

522

RECTIFIER

DIODE

+

A

3

3

551B

BRIDGE

551A

P10

4

4

551B

-

N.E.

P11

P6

1

L6

551

2

41

580

42

3

R

563

L4

562

4

U

575B

5

B

552A

575

L5

6

N.B.

TRIGGER

551

7

B

575B

550

8

W

INPUT

14 PIN

575C

556

A

AMPHENOL

CONNECTOR

554

B

TRIGGER

TO POWER

L1

SOURCE

N.B.

C

CONNECTOR

D

J13

A

E

606A

B

OUTPUT

C

2

1B

CONTROL

D

4

REMOTE

E

77A

L3

606

N.D.

VOLTAGE

F

76A

CONTROL

G

75A

H

THERMAL LED

I

41

42VAC

J

1W

1B

K42

L

	M	67			577					575C				576									4													COLD FEED
SENSE	N																														2
J12																																			558
			580																																515A
NOTES:						550							A	563	521										587		608		1W K			558 601	589	515		S1
		N.B.
			562			554		552A 553				556		552		522														E		559	515
N.A. CAVITY NUMBERING SEQUENCE AS VIEWED FROMCOMPONENT SIDE																								605		607				Y			606		559
OF BOARD.																																		N.C.		GAS PURGE
N.B. CAVITY NUMBERING SEQUENCE AS VIEWED FROM LEAD SIDE OF
			1	2	3	4	5	6	7	8	9	10 11 12 13 14 15 16			1	2	3	4	5	6	1	2	1	2	3	4	5	6	7	8	9	10 11 12 13 14 15 16
CONNECTOR.
																																				TRIGGER
N.C. TOGGLESWITCHES AND POTENTIOMETERS SHOWN FROM
																																				INTERLOCK
CONNECTION SIDE OF SWITCH.
										J1							J2				J3									J14
N.D. PIN NEAREST THE FLAT EDGE OF LED LENS ALIGNS WITH WHITE LEAD															COMMON ANALOG P.C. BOARD																				589
OF LEDSOCKET.																																				S2
																																			587
N.E. PLACE P11 INAPPROPRIATE POSITION FORSPEED OR TORQUE.
																																		N.A.
CONNECTION SHOWN IS FOR NORMAL SPEED. NOTE: NORMAL SPEED																																				2-STEP
NOT AVAILABLE ON HIGH TORQUE MODEL. HIGH TORQUE NOT AVAILABLE ON
																																		N.C.		A
NORMAL SPEED MODEL.
																																				L12484

NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The wiring diagram specific to your code is pasted inside one of the enclosure panels of your machine.

LF-72/74