Lincoln Electric NA-5N, NA-5NF, NA-5S, NA-5SF }

G-3

ELECTRICAL DIAGRAMS

NA-5

LOGIC PC BOARD (L6242-1) SCHEMATIC

R707

R706

581

S801A

DISABLE

START

500

D9C

START

581A

N.A. C706

DZ702

LED 7C

515

D8C

R702

R703

D710

500

D9C

582

C704

DZ701

STOP

R704

565

PROCEDURE

PC BOARD

WELD TIME

OVER

D708

C728

500

D9C

R705

C705

500

D9C

4X707

X707 3

515

D8C

R713

LED7D

R712

D714

R711

CR4

CURRENT

528

500

C707

D9C

D709

687

SHUT-

DOWN

C4M

R708

515

D8C

D715

566

PROCEDURE

PC BOARD

D716

BURNBACK

TIME OVER

C729 500

D9C

X706

8P7

X702

11 E

X706

584S

START

TIME

INITIATE

CURRENT

588 }PROCEDURE

PC BOARD

L701

X706

515

D8C

R714

637

C2M

VOLTAGE

PRESENT

R715

R716

Q701

D717 +

C709

DZ703

R717

515

D8C

LED 7J

DZ704

C712

INCH

DOWN

592 R718

592

C3K

500

D9C

X705

2X703

X705

P10

692

N.D.

X701

12 11

691

N.D.

R710

C711

500

D9C

X707

12 11

X707

11 E10

X705

694

N.C.

X701

PROCEDURE

PC BOARD START TIME

OVER WELD TIME

OVER

583S

X701

C708

500

D9C

R709

X702

13 11

PROCEDURE

PC BOARD

CRATER

TIME OVER

BURNBACK

TIME

INITIATE

583C 3B4

X706 P9

13 X704

X704

11 10

985

4X703

X704

X703

D11

693

N.D. DZ705

LED

13 AX705

N.B.

.047

MFD

CR6

470

OHMS

500

D9C

689

X702

85CX705

584C

CRATER

TIME

PROCEDURE

PC BOARD

INITIATE

P1 5C

X706

6P4 690

N.D.

R738

C725

D726

Q709

560

PRESET

MONITOR

ENABLE

515

D8C

R737

PROCEDURE

PC BOARD

R735

D725

R736

C724

Q708

530

C4D

500

D9C

HOLD-LOW

DISABLE

R742

C727

500

D9C

R741

X705

9Q711

564

WELD

PROCEDURE

ENABLE

PROCEDURE

PC BOARD

R721

C719

500

A7H

Q702

R720

D718 CR2

D722

LED 7H

TRAVEL

R722

610

A7E

589

R726

C721

500

A7H

Q704

R725

D720

CR3

D723 LED 7K

POWER

R727

610

A6G

682

LT1

ELECTRODE

HOT

R734

C723

Q707

688

500

D9C

R733

SHUTDOWN

ENABLE

C5K

C5E

N.E.

R740

C726

Q710 563

500

D9C

DZ706

PROCEDURE

PC BOARD

561

STRIKE PROCEDURE

DISABLE

R739

STRIKE

ENABLE

PROCEDURE

R724

C720

500

A7H

Q703

D719

CR5

610

A6G

681

R723

CURRENT

ARC CONTROL

ENABLE

R729

C722

500

A7H

Q705

D721

CR1

D724

LED 7G

R730

610

A6G

585 FLUX OR

WATER

R728

X704

587

A3K

FEED

FORWARD

R731

R732

C710

500

D9C

INCH

586

B7J

FEED

ENABLE

R1001

D1002

D1004

C1001

1001

D1001

D1003

SWITCH

D1005

24V SIG.

START

R1002

D1007

D1009

C1002

1002

D1006

D1008

SWITCH

D1010

24V SIG.

SIGNAL

COMMOM

R1003

D1012

D1014

C1003

1003

D1011

D1013

SWITCH

D1015

24V SIG.

R1004

D1017

D1019

C1004

1004

D1016

D1018

SWITCH

D1020

24V SIG.

SIGNAL

COMMOM

STOP

INCH UP

INCH DOWN

REMOTE INTERFACE

OPTION

RED

VAC

24 RED

D1021 D1023

D1024

D1022

500

D9C

592 CR

1004

D7A

COMMON

SWITCH

586 CR

1003

D7J

582 CR

1002

D3A

581A

1001

D1A

F1001

COMMON

SWITCH

A6G

FOR LEAD #694 CONNECTION SEE N.C.

METHODS OF TRAVEL AND BURNBACK.

NA-5 SHIPPED CONNECTED FOR INDICATED

SOURCE

OUTPUT

500

D9C

PROCEDURE

PCB

Q706

CLEVELAND, OHIO U.S.A.

1-12-96D L6682-4

C701

4.7/35

C702

C703

C704

C705

C706

C707

C708

C709

C710

THRU

C729

D701

THRU

D712

500/50

.047/100

10/25

D714

THRU

D717

D718

THRU

D721

D722

THRU

D726

.22/100

10/25

.047/100

10/25

}

.022/25

1A, 400V

1A, 1000V

16V, 1W

DZ701

DZ702

DZ703

DZ704

DZ705

DZ706

LED 7A

L701

THRU

16V, 1W

3V, 1/2W

16V, 1W

3V, 1/2W

5.1V, 1/2W

5.6mH, 28mA

LED 7E

LED 7G

LED 7H

LED 7J

LED 7K

Q701

RED

LIGHT

EMITTING

DIODE

Q702

THRU

Q705

Q706

THRU

Q711

}

2N 4123

2N 5657

2N 4123

R701 4.7K

4.7K

47K

100

R702

R703

R704

R705

R706

R707

R708

R709

R710

R711

R712

R713

R714

R715

R716

R717

R718

R720

R721

R722

R723

R724

470

100

4.7K

47K

470

15K

470

4.7K

100K

22K

4.7K

100

2.7K

1.5K

68K

2.7K

1.5K

R725 2.7K

R726

R727

R728

R729

R730

R731

R732

R733

R734

R735

R736

R737

R738

R739

R740

R741

R742

X701

1.5K

68K

2.7K

1.5K

68K

22K

47K

22K

47K

22K

47K

6.8K

47K

10K

15K

10K

15K

QUAD 2

X702

X703

X704

INPUT

GATE

NAND

X707

X705

X706

X708

HEX

INVERTER

+15 V VOLTAGE

REGULATOR

LOGIC P.C. BOARD

KEY TO SYMBOLS

SCHEMATIC LOCATION REFERENCE

HORIZONTAL CO-ORDINATE LETTER

VERTICAL CO-ORDINATE NUMBER

UNLESS OTHERWISE SPECIFIED, COMPONENT VALUES OF:

CAPACITORS = MFD/VOLTS

RESISTORS = OHMS, 1 2 WATT/

POWER SUPPLY SOURCE POINT

SCHEMATIC IDENTIFICATION LETTER

SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT

BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGE-

ABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT

SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS

HAVING A COMMON CODE NUMBER.

ELECTRICAL SYMBOLS PER E1537

COMPONENTS NOT ON P.C. BOARD

TIC 22V 600mA SECONDARY

(PRIMARY SHOWN ON SCHEMATIC A)

}

SPST PUSH BUTTON SWITCH

LT1 INDICATOR LIGHT

CR6 OPTIONAL LINC-FILL

SOLID-STATE PILOT RELAY

}

CR5

CR4

CR3

}

OPTIONAL 110 VDC RELAY

COIL ACTUATED BY CR4

REED SWITCH ACTUATED BY

WELDING CURRENT

CR2

CR1 SPST 110 VDC RELAY COIL

SCHEMATIC A)

(N.O. CONTACTS SHOWN ON

R1001 THRU R1004

D1001 THRU D1004

C1001 THRU C1004

CR1001 THRU CR1004

F1001

2/50

150

SPDT, 24VDC

1A, 600V

1/8A FUSE

OPTIONAL REMOTE INTERFACE P.C. BOARD

}

FOR REMOTE INTERFACE PC. BOARDS L6580-1

OR HIGHER USE S21207 SCHEMATIC FOR

COMPONENT VALUES AND CIRCUIT CONNECTIONS.

N.A. S801 (SEE PROCEDURE PC BOARD

POSITION TO START WELD CYCLE.

SCHEMATIC) MUST BE IN "STRIKE"

N.B. COMPONENTS INCLUDED WITH

OPTIONAL LINC-FILL BYPASS KIT

(ALSO SEE SCHEMATIC A).

N.C. LEAD 694 TO BE CONNECTED TO

N.D. LOGIC BOARD JUMPER LEADS ARE TO

BE CONNECTED TO SUIT APPLICATION

PER CHARTS BELOW.

PIN P10 IF OPTIONAL CRATER MODULE

(SEE SCHEMATIC E) IS INSTALLED, OR

TO PIN P8 IF REMOVED.

G1556-1 AND EARLIER VOLTAGE BOARDS.

N.E. HOLD-LOW DISABLE IS USED WITH

ARC CONTROL ENABLE IS USED WITH

LATER VOLTAGE BOARDS.

START WITH WELD CURRENT

TO PIN

NO.

LEAD

NO.METHODS OF TRAVEL

START-STOP

WITH SWITCHES

START-STOP

WITH WELD CURRENT

STOP WITH STOP SWITCH

START WITH START SWITCH

STOP AFTER CRATER TIME

START WITH START SWITCH

STOP AFTER BURN-BACK TIME

691

692 P6

691

692 P6

691

692 P7

691

692 P6

691

692 P6

TO PIN

NO.

LEAD

NO.METHODS OF BURNBACK

WIRE FEED STOP WITH

CONTACTOR DELAY

INCH UP WITH

CONTACTOR DELAY

690

693 P4

690

693 P4

INCH UP WITH NO

CONTACTOR DELAY 690

693 P2

WHEN OPTIONAL

PROCEDURE MODULE

IS INSTALLED IN

CRATER RECEPTACLE

D712

LED 7B

515

D8C

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

COMPONENT VALUES AND CIRCUIT CONNECTIONS.

G-3

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

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.

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