Logic PC Board L6242-1 Schematic | Lincoln Electric NA-5SF, NA-5NF

Return to Section TOC

Return to Master TOC

G-3

ELECTRICAL DIAGRAMS

G-3

LOGIC PC BOARD (L6242-1) SCHEMATIC

LED 7B

PROCEDURE

583S

564

PROCEDURE

610

D1021 D1023

REMOTE INTERFACE

PC BOARD

START TIME

WELD TIME

A6G

515

PC BOARD

OPTION

OVER

X705

P10

X701

X705

R741

WELD

RED

R1001

D8C

581A

581 R706

R707

X707

R742

C727

PROCEDURE

R722

A7E

VAC

D1022

1001

N.C.

ENABLE

D718

TRAVEL

D712

START

Q711

D1024

D1001

DISABLE

694

CR2

LED 7H

RED

D1002

S801A

DZ702

692

X705

500

D722

F1001

D1003 +

D1004

N.A.

C706

C1001

X701

D9C

589

R720

581A

1001

SWITCH

24V SIG.

START

N.D.

R721

Q702

560

PROCEDURE

D1005

X705

D1A

START

PROCEDURE 565

D708

X707

X701

PC BOARD

C719

500

689

PRESET

R1002

D9C

PC BOARD

3 13

MONITOR

500

D1006

D1007

515 WELD TIME

N.B.

OHMS

ENABLE

SWITCH

470

R738

A7H

610

SIGNAL

OVER

Q709

582

1002

COMMON

1002

D8C

R705

COMMOM

R702

R704

C705

691

C725

D8C

A6G

D3A

D1008 +

C1002 D1009

500

CR6

500

X701

515

SWITCH

24V SIG.

LED 7C

D9C

N.D.

.047

D9C

R737

ELECTRODE

D1010

C728

R727

586

1003

D710

MFD

LT1

D1011

D726

HOT

STOP

R1003

582

R703

DZ701

500

D725

CR3

D1012

D9C

500

530

HOLD-LOW

D720

D7J

1003

C704

X705

584C

LED 7K

X702

PROCEDURE

C4D

DISABLE

D723

D1013 +

C1003 D1014

D9C

X707

R735

POWER

515

CRATER

PC BOARD

R725

682

STOP

R736

Q708

Q704

SOURCE

SWITCH

24V SIG.

D8C

R709+

TIME

R726

OUTPUT

515

R710

INITIATE

500

D1016

R708

500

C724

C721

INCH UP

D9C

D709

R1004

PROCEDURE

566

C711

C708

D9C

500

592

D1017

D8C

PC BOARD

500

A7H

1004

SIGNAL

BURNBACK D715

500

1004

R713

D9C

X706

D7A

SWITCH

COMMOM

R711

687

TIME OVER

D716

500

D9C

X707

690

610

24V SIG.

SWITCH

SHUT-

688

SHUTDOWN

N.E.

COMMON D1018 +

C1004 D1019

LED7D

DOWN

ENABLE

A6G

C4M

C5K

X706

C729

D9C

N.D.

500

D1020

ARC CONTROL

C5E

D9C

R712

R733

INCH DOWN

528

ENABLE

D714

R734

Q707

CURRENT

CR4

C707

X706

CR5

CURRENT

588

C723

PROCEDURE

500

X706

CURRENT

500

D719

N.A. S801 (SEE PROCEDURE PC BOARD

515

D9C

X702

584S

PC BOARD

}

D9C

SCHEMATIC) MUST BE IN "STRIKE"

D8C

START

PROCEDURE

561

563

R723

681

POSITION TO START WELD CYCLE.

R714

TIME

Q703

N.B. COMPONENTS INCLUDED WITH

X702

DZ706

PCB

R724

INITIATE

PC BOARD

STRIKE PROCEDURE

Q710

STRIKE

PROCEDURE

OPTIONAL LINC-FILL BYPASS KIT

VOLTAGE 637

L701

X706

R739

DISABLE

PROCEDURE

C720

(ALSO SEE SCHEMATIC A).

PRESENT

C2M

R740

ENABLE

500

N.C. LEAD 694 TO BE CONNECTED TO

X702

C726

A7H

PIN P10 IF OPTIONAL CRATER MODULE

R715

CRATER

610

(SEE SCHEMATIC E) IS INSTALLED, OR

500

A6G

TO PIN P8 IF REMOVED.

Q701

515

TIME OVER

X704

N.D. LOGIC BOARD JUMPER LEADS ARE TO

D8C

BURNBACK

X706

D9C

BE CONNECTED TO SUIT APPLICATION

PROCEDURE

TIME

PER CHARTS BELOW.

R717

INITIATE

R730

R716

D717

LED

N.E. HOLD-LOW DISABLE IS USED WITH

PC BOARD

583C

C709

13 X704

X704

X703

587

FEED

CR1

G1556-1 AND EARLIER VOLTAGE BOARDS.

X703

D721

ARC CONTROL ENABLE IS USED WITH

LED 7J

A3K

FORWARD

586

R728

LED 7G

LATER VOLTAGE BOARDS.

592

DZ703

FEED

D724

N.D.

FLUX OR

LEAD

TO PIN

DZ705

ENABLE

585

X705

X703

693

Q706

B7J

METHODS OF TRAVEL

NO.

C3K

WATER

X703

Q705

START-STOP

691

592

R718

D 2

R731

R729

C712

R732

C710

WITH SWITCHES

692

C722

START-STOP

691

INCH

WITH WELD CURRENT

692

DZ704

500

START WITH WELD CURRENT

691

INCH

A7H

STOP WITH STOP SWITCH

692

DOWN

500

D9C

WHEN OPTIONAL

START WITH START SWITCH

691

PROCEDURE MODULE STOP AFTER CRATER TIME

692

D9C

IS INSTALLED IN

START WITH START SWITCH

691

CRATER RECEPTACLE STOP AFTER BURN-BACK TIME

692

LEAD

TO PIN

METHODS OF BURNBACK

NO.

FOR LOGIC P.C. BOARDS L6242-2 OR HIGHER USE G2974 SCHEMATIC FOR

FOR REMOTE INTERFACE PC. BOARDS L6580-1

WIRE FEED STOP WITH

690

COMPONENT VALUES AND CIRCUIT CONNECTIONS.

OR HIGHER USE S21207 SCHEMATIC FOR

CONTACTOR DELAY

693

LOGIC P.C. BOARD

COMPONENT VALUES AND CIRCUIT CONNECTIONS.

INCH UP WITH

690

OPTIONAL REMOTE INTERFACE P.C. BOARD

CONTACTOR DELAY

693

INCH UP WITH NO

690

C701

.22/100

DZ701

16V, 1W

R704

47K

R728

2.7K

2/50

C1001 THRU C1004

CONTACTOR DELAY

693

C702

500/50

DZ702

16V, 1W

R705

470

R729

1.5K

CR1001 THRU CR1004

SPDT, 24VDC

FOR LEAD #694 CONNECTION SEE N.C.

C703

4.7/35

DZ703

3V, 1/2W

R706

100

R730

68K

D1001 THRU D1004

1A, 600V

NA-5 SHIPPED CONNECTED FOR INDICATED

C704

.047/100

DZ704

16V, 1W

R707

4.7K

R731

22K

F1001

1/8A FUSE

METHODS OF TRAVEL AND BURNBACK.

C705

10/25

DZ705

3V, 1/2W

R708

47K

R732

47K

R1001 THRU R1004

150

KEY TO SYMBOLS

C706

.047/100

DZ706

5.1V, 1/2W

R709

470

R733

22K

C707

10/25

L701

5.6mH, 28mA

R710

470

R734

47K

COMPONENTS NOT ON P.C. BOARD

POWER SUPPLY SOURCE POINT

C708

10/25

LED 7A

R711

15K

R735

22K

CR1

SPST 110 VDC RELAY COIL

SCHEMATIC LOCATION REFERENCE

C709

10/25

THRU

R712

470

R736

47K

RED

CR2

(N.O. CONTACTS SHOWN ON

C710

LED 7E

R713

4.7K

R737

6.8K

CR3 }

SCHEMATIC A)

HORIZONTAL CO-ORDINATE LETTER

THRU

.022/25

LED 7G

LIGHT

R714

4.7K

R738

47K

C729 }

LED 7H

EMITTING

R715

100K

R739

10K

CR4

}

REED SWITCH ACTUATED BY

VERTICAL CO-ORDINATE NUMBER

DIODE

WELDING CURRENT

SCHEMATIC IDENTIFICATION LETTER

D701

}

LED 7J

R716

22K

R740

15K

CR5

}

OPTIONAL 110 VDC RELAY

THRU

1A, 400V

LED 7K

R717

4.7K

R741

10K

UNLESS OTHERWISE SPECIFIED, COMPONENT VALUES OF:

COIL ACTUATED BY CR4

D712

Q701

2N 4123

R718

100

R742

15K

CR6

}

OPTIONAL LINC-FILL

CAPACITORS = MFD/VOLTS

D714

1A, 400V

Q702

2N 5657

R720

2.7K

X701

QUAD 2

SOLID-STATE PILOT RELAY

RESISTORS = OHMS, 1 2 /WATT

THRU

R721

1.5K

X702

INPUT

LT1

INDICATOR LIGHT

SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT

D717 }

Q705 }

R722

68K

X703

NAND

BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGE-

D718

Q706

}

R723

2.7K

X704

GATE

SPST PUSH BUTTON SWITCH

ABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT

THRU

1A, 1000V

THRU

2N 4123

R724

1.5K

X707

D721 }

Q711

R725

2.7K

X705

HEX

SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS

D722

1A, 400V

R701

4.7K

R726

1.5K

X706

INVERTER

TIC}

22V 600mA SECONDARY

HAVING A COMMON CODE NUMBER.

THRU

R702

4.7K

R727

68K

X708

+15 V VOLTAGE

(PRIMARY SHOWN ON SCHEMATIC A)

ELECTRICAL SYMBOLS PER E1537

1-12-96D

D726 }

R703

100

REGULATOR

CLEVELAND, OHIO U.S.A.

L6682-4

NOTE:

Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is provided

NA-5

for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the machine.

Lincoln Electric NA-5SF, NA-5NF service manual Logic PC Board L6242-1 Schematic, KEY to Symbols

Models: NA-5S NA-5N NA-5SF NA-5NF

Return to Master TOC

ELECTRICAL DIAGRAMS

LOGIC PC BOARD (L6242-1) SCHEMATIC

KEY TO SYMBOLS

CLEVELAND, OHIO U.S.A.

NA-5

NA-5S, NA-5N, NA-5SF, NA-5NF specifications