Lincoln Na5 Service Manual

							NOTES   
NA-5Return to Section TOCReturn to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC 
						

							G-2
ELECTRICAL DIAGRAMS
NA-5
Wiring Diagram
1553      
  8-24-84H  
  11-14-86L 
  7-19-91J  
  7-10-92B  
  5-19-95D     1-12-96D  
  7-12-96P  
            
            
                                      
            
            
            
                                     
            
            
            
                                     
            
            
            
            
               NA-5               
          WIRING DIAGRAM          
DAD            NONE    
1553      
   8-1-80   
       
 5-8-92 
    G1512   
t
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON HOLE SIZES PER E2056
ON 2 PLACE DECIMALS IS   .02
WITH PUBLISHED STANDARDS.
ON 3 PLACE DECIMALS IS   .002
ON ALL ANGLES IS   .5 OF A DEGREE MATERIAL TOLERANCE ( ) TO AGREE
THE LINCOLN ELECTRIC CO.CLEVELAND, OHIO U.S.A.
EQUIP.
TYPE
SCALE
DR DATE CHK REF.
SUBJECT
SUPSDG SHT.
NO.
THE LINCOLN ELECTRIC CO.
THIS SHEET CONTAINS PROPRIETARY INFORMATION
 
  OWNED BY
AND IS
NOT TO BE REPRODUCED, DISCLOSED OR USED
THE LINCOLN ELECTRIC CO.
G
G
WITHOUT THE EXPRESS PERMISSION OF
DIGITAL METER
VOLTMETER BOARD SPEED-
METER
BOARD
510
519
602
601
2 53 4
1
6518
510 517
510P 602
601
510P
510P
602
601
510
510519
510P 602 601
DIGITAL METER2 53 4
1
6
WORK WELDING
NOZZLE
ARM.
ELECTRODE
BLUE
BLACK
WHITE RED
541539
626 627 67
525A555
510ATACH. PICK-UP
P.C. BD.
CONTROL
POWER
SOURCE A
B
C 87
531
GND
A B
C
D
E
F 541
539
627
626
67
A B
C
D
MOTOR RECEPTACLE
525A555
510A
A B
C
D
E
F
TACH. RECEPTACLE
G
H
I 2
4
31
32 21
A
B
C
GREEN
531 87
FLUX OR WATER
SOLENOID
INPUT RECEPTACLE
S12778
S12515
S12514
S12515
S13161-052
S13161-5/64
S14904(OUTER)
S14905(INNER)
S12514
S14904(OUTER)
S14905(INNER)
   57F 57/1
   57 57/1
   95 95/1
  95S 95/1
   142 142/1 142/1
142T SINGLE .035-.052
SINGLE 1/16-3/32
SINGLE 3/32-5/32
SINGLE 1/16-3/32
TWIN .045-.052
SINGLE 3/32-7/32
TWIN 3 32
        / TWIN 1/16-5/64
TWIN 5/64-1/8 40-778 I.P.M.
38-762 I.P.M.
22-428 I.P.M.
23-456 I.P.M.
15-289 I.P.M.
15-300 I.P.M.
   PIN        RATIO     PART NUMBER      RANGE           RANGE
      USE OF PIN S JUMPER CONNECTION.
541
539
627
87
32
531
532
531B 31
RF BYPASS
P.C. BOARD
621 87
667
531
626
WHITE
627
626
610681
500 500 528
689
+-2
5
1
6 3
4
532
531A
631
610 531B
5001/2A SLOW BLOW
POWER P. C. BOARD
POWER FUSE
1/2A SLOW BLOWFIELD FUSE
539
627
541
626
1
2
3
4
5
6
528
500
CR4
COUPLED
MAGNETICALLY
ELECTRODE CABLE
TO POWER SOURCE
REED SWITCH ACTUATED BY
WELDING CURRENT
*
*
2 4
8
6
3
7
9
5
1 587
525 510
540500
525510
500 500
*
ORANGE ORANGE
REDWHITE
RED
TS2528
ELECT67
TS1
500
WORK
21
531A R1
631 531B
      POLARITY CONNECTIONS WHICH MATCH ELECTRODE AND WORK CABLE POLARITY\
 CONNECTIONS TO POWER SOURCE.       HI-FREQUENCY INSTALLATION INSTRUCTIONS FOR REQUIRED #67 ELECTRODE \
VOLTAGE SENSING LEAD CONNECTION.
      NOTE:  NA-5 MOTORS INSULATED FOR HIGH FREQUENCY STARTING DO NOT HA\
VE THIS CONNECTION.  REFER TO
COM TAB, UNLESS SPECIFIED ON THE POWER SOURCE CONNECTION DIAGRAM TO BE\
 CONNECTED TO THE AUTO TABTO DISABLE THE COLD STARTING FEATURE. AND TAPED CONNECTION
532
531
531A
CB1
500500
528
689
621
667
TERMINAL
STRIP JUMPER
CIRCUIT
POLARITY
TERMINALS
610 R
ELECTRODE 500
*
*
682 681585
610
2 LOGIC
P.C. BOARD
* *
BLUE BLUE
WHITE
RED
RED
BLUE
BLUE
YELLOW
YELLOW
BLACK
BLACK
601
602
T1 587
ORANGE
ORANGE
BROWN
BROWN
T2
500
12 540
10 525
9 510
14
13 628
1 520
8 510P
7 510P
METER
6 632
2 512
3 511
5 511A
4 510P
15 586
11
*
CONTROL
P.C. BOARD
F
S
555 510A
525A VOLTAGE P.C. BOARD
516
9
514 2
635 4
564A
510P 8
10
525 3
510 7
500 6
5
530 1
667 11
621 12
6
A
B 4
C 5
592 3
687 2
688 1
3
531B
8
532 9
637 4
511 1
511A 2
7
500 6
5
*FAST BLOW FUSE
1 8 AMP
/
S
F
*
B
D A
*BYPASS COM
AUTO*
4213688
688A
525
500FILTER P.C. BOARD LEAD PLUG
500
500
560
1
564 2
500 3
515 4
635 5
520 6
632 7
510P 8
9
W
W 10
564A 11
114A 12
*
PROCEDURE KIT
RECEPTACLE
JUMPER PLUG
ELECTRICAL SYMBOLS PER E1537
CAVITY NUMBERING SEQUENCE*
N.M.
N.L.
N.E.
563 N.N.
1
584C
2 564
583S
4
5 500
6 515
3 500
1
5
4
6 3
589 581
1
582
4
628
2
530
3
687
5
688
6
5
563
9
563
6
561
8
560
7
588
4
584S
3
566
2
565
1
583C
4 321
5
6 637
528 586
587
592
689*
REMOTE INTERFACE MODULE (OPTIONAL)
COM COM
UP DOWN START
STOPSWITCHES
RED
RED
N.L.
24V.
SIGNALS
*
1
6 5
4
2
3
581A
500586
592
582 515
N.F.
WHITE WHITE
RED
RED
N.D.
N.H FLUX RECEPTACLE
J4 A
B
C
GND
D 532
25
531
J3
J2
J1
WORK CABLE TO
   POWER SOURCE TS
3
N.K.
N.J.
5A CIRCUIT
BREAKER
25
TRAVEL SW. S2 532
531 31 32
POWER SW.
S1
HOT LIGHT LT1 DOWN
592
500S4
INCH UP
S3
586 500
625
N.A.  SPEEDMETER BOARD CALIBRATION JUMPER IS TO BE CONNECTED FOR NA-5 HE\
AD AND DRIVE ROLL
      EMPLOYED PER CHART BELOW: (CONNECTED TO PIN 95 OR 21     WHEN\
 SHIPPED.
21 21/1S12778 SINGLE .035-.052
100-2070 I.P.M.
= EARLIER SPEEDMETER BOARDS DID NOT HAVE THESE PINS.
= SINGLE 21 PIN ON HIGH SPEED BOARD ONLY.
N.B.  REMOVE START RECEPTACLE JUMPER PLUG FROM PROCEDURE BOARD TO INSTAL\
L OPTIONAL PROCEDURE MODULE AS START PROCEDURE CONTROL.  IF MODULE IS REMOVED, REPLACE JUMPER\
 PLUG.
N.C.  REMOVE CRATER RECEPTACLE JUMPER PLUG FROM PROCEDURE BOARD TO INSTA\
LL OPTIONAL PROCEDURE MODULE AS CRATER PROCEDURE CONTROL AND CONNECT LOGIC BOARD LEAD #694 TO \
PIN #P10.
IF MODULE IS REMOVED, REPLACE JUMPER PLUG AND LOGIC BOARD LEAD #694 TO P\
IN #P8.
N.D.  CONTROL BOARD JUMPER LEAD CONNECTED TO PIN F WHEN SHIPPED.  SEE \
OPERATING MANUAL FOR
N.E.  VOLTAGE BOARD RED JUMPER LEAD CONNECTED TO PIN S AND WHITE JUMPE\
R LEAD CONNECTED TO N.G.  531-532  115VAC
      531-25   115VAC (SWITCHED) 250 VAC
N.J.  CONNECT #67 BLACK (ELECTRODE) LEAD AND #21 WHITE (WORK) LEAD T\
O APPROPRIATE TERMINAL STRIP
N.K.  LEAD CONNECTED TO MOTOR FRAME WHICH IS ELECTRICALLY COMMON WITH EL\
ECTRODE DRIVE ROLL AND DRIVEN ELECTRODE.
N.L.  REMOVE JUMPER PLUG TO INSTALL OPTIONAL KIT.  IF KIT IS REMOVED, RE\
PLACE JUMPER PLUG. N.M.  NOT PRESENT ON EARLIER VOLTAGE P.C. BOARDS.
N.N.  BLUE JUMPER LEAD NOT PRESENT ON EARLIER VOLTAGE P.C. BOARDS.  THE \
JUMPER IS TO BE CONNECTED TO THE
BLUEWHITE RED
582
STOP S6581A
682
ELECTRODE LEAD BOLTED
142T
95S
57F
TIMER BOARD
(START TIME USE)
655
500
I
O
515
12
4
14 13 9
6 7 1
8
10 11 3
5
2
15
500
510P
515
520
635
632
584S
583S 584C
583C
588
563
564
564A
START RECEPT.
*
10 5
6
12
14 15
11 8
9
71
13 2
4
3
520
515
510P 500
583S 584S
588
588A
635
632
655
JUMPER PLUGS
*
105
6
12
14 15
11 8
9
71
13 2
4
3
520
515
510P 500
588
588A
635632
655
584C
583C
CRATER RECEPT. OPTIONAL PROCEDURE MODULE
USED FOR START CONTROL
5
4
3
2
1
6
581A
581
565
566
561
560
*
N.B. N.C.
5
6
4
3 2
1 1
500
655
515I
O
*5
6
4
3
2
1
500
655
515
I
O
WELD TIME
RECEPT.
TIMER BOARD
655
500
I
O
515
OPTION BOARD5
6
4
3
2
1
655
500
I
O
515
TIMER
RECEPT. OPTIONAL PROCEDURE MODULE
USED FOR CRATER CONTROL
(CRATER TIME USE)
TIMER BOARD
(BURNBACK TIME)500 655 515 I
O
START S5
500
581A
581A
516514
512 511
510P
601
602 517
519
655
500
I
O
515
WELD TIMER BOARD
(OPTIONAL)
N.A.
SET-ACTUAL S7 PROCEDURE BOARD
*BURNBACK
RECEPT.
531B 532
592
(COMPONENT SIDE OF P.C. BOARD)
SPEEDMETER NA-5 HEAD   DRIVE ROLL       WIRE SIZE      RATED SPEED
562S
562S
562C
562C
142
95
57
1
2 3
4 1
2
3 4
5
6 1
2
3 4
5
6 7
8
9 1
2
3 4
5
6 7
8
910
11
12 1
2
3 4
5
6 7
8
910
11
12 13
14
15
J29
N.H.  531-87 115 VAC (SWITCHED)  1/2 AMP.
PIN B WHEN SHIPPED, FOR USE TYPICALLY WITH DC-[ ]TYPE POWER SOURCES.  \
REFER TO CONNECTION
DIAGRAM FOR ALTERNATE CONNECTIONS, AND JUMPER CONNECTIONS FOR R3S, SAM A\
ND SAF OR SA
POWER SOURCES WITH K224.  EARLIER VOLTAGE BOARDS DO NOT CONTAIN PIN D.\
 1/8 AMP FUSE
OPTIONAL PULSE POWER
TRAVEL RECEPT.
J5
1
562 583
655 515
500 584
588
588A 632
635
520
510P 9
10
8
3
2
6 4
12 5
11*
7
P29 (C) J29 (C)
J28 (C)
(CRATER FILL USE)
OPTION BOARD
5
6
4
3
2
1655
500
I
O
515
TIMER
RECEPT.1
562 583
655 515
500 584
588
588A 632
635
520
510P 9
10
8
3
2
6 4
12 5
11*
7(START USE) J28 (S)
J29 (S)
P29 (S) P28 (S)
J28
P28 (C)
CABLETO
532
87
610
532
585589
FLUX RELAY MODULECR1
3
1
4
2610
CR2
3
1
4
2RELAY MODULERELAY MODULE
N.P.
532
TRAVEL
CONTACTOR
4 2
625
682CR33
1
4
2610
N.P.
N.P.
N.P.  EARLIER RELAYS HAD SAME TERMINAL NUMBERS BUT IN A DIFFERENT ORIENT\
ATION.
METHODS OF TRAVEL
START/STOP WITH SWITCHES
LEAD #691 to P6
LEAD #692 to P5
LEAD #691 to P6
LEAD #692 to P7
STOP WITH STOP SWITCH
LEAD #691 to P5
LEAD #692 to P7
START WITH START SWITCH
STOP AFTER CRATER TIME
LEAD #691 to P6
LEAD #692 to P9 FOR EARLIER LOGIC P.C.
BOARDS WITH JUMPERS
CONNECT
CONNECT
SWITCH #112 3 4
SWITCH #212 3 4
SWITCH #112 3 4
SWITCH #212 3 4
FOR LOGIC P.C. BOARDS WITH
CONNECT
CONNECT
SWITCH #112 3 4
SWITCH #212 3 4
SWITCH #112 3 4
SWITCH #212 3 4
FOR EARLIER LOGIC P.C.
BOARDS WITH JUMPERS
YES CONNECT
LEAD #694 TO P10
NO CONNECT
LEAD #694 TO P8CRATER BOARD INSTALLED?
SWITCH #112 3 4
SWITCH #212 3 4
SWITCH #112 3 4
SWITCH #212 3 4
FOR LOGIC P.C. BOARDS WITH
DIP SWITCHES
DIP  SWITCHES
FOR EARLIER LOGIC P.C.
BOARDS WITH JUMPERS
SWITCH #112 3 4
SWITCH #212 3 4
SWITCH #112 3 4
SWITCH #212 3 4
FOR LOGIC P.C. BOARDS WITH
DIP SWITCHES12 3 4 12 3 4
METHODS OF BURNBACKCONNECT
LEAD #690 TO P4
LEAD #693 TO P3
CONNECT
LEAD #690 TO P4
LEAD #693 TO P1
CONNECT
LEAD #690 TO P2
LEAD #693 TO P1
12 3 4SAMPLE SWITCH
SWITCH POSITION 1 IS UP
SWITCH POSITION 2 IS DOWN
SWITCH POSITIONS 3 AND 4 ARE NOT APPLICABLE
NA-5 SHIPPED CONNECTED FOR INDICATED METHODS OF TRAVEL & BURNBACK.
START WITH START SWITCH
LEAD #691 to P6
LEAD #692 to P8 CONNECT
SWITCH #112 3 4
SWITCH #212 3 4
START/STOP WITH WELD CURRENT
START WITH WELD CURRENT(OPTIONAL PROCEDURE MODULE
INSTALLED IN CRATER RECEPTACLE)
(OPTIONAL PROCEDURE MODULE
INSTALLED IN CRATER RECEPTACLE)STOP AFTER BURN-BACK TIME
N.F.  LOGIC BOARD DIP SWITCHES OR JUMPERS TO BE SET TO SUIT DESIRED APPL\
ICATIONS PER CHARTS BELOW:
WIRE FEED STOP WITH
CONTACTOR DELAY
INCH UP WITH CONTACTOR DELAY
INCH UP WITH NO CONTACTOR
DELAY
USE OF OPTIONAL CRATER MODULE
N.R.
N.R.
N.R. N.R.  POTENTIOMETERS AND SWITCHES MOUNTED ON P.C. BOARD ARE CONNECTED TO\
 FRAME, FOR ESD.(NOT PRESENT ON EARLIER BOARDS)
G-2
NOTE:This diagram is for reference only. It may not be accurate for all machines covered by this manual.
Return to Section TOC Return to Section TOCReturn to Section TOC Return to Section TOC
Return to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC 
						

							G-3
ELECTRICAL DIAGRAMS
NA-5
LOGIC PC BOARD (L6242-1) SCHEMATIC
R707
R706
581
S801A DISABLE
START500D9C
START
S5581A
N.A.
C706
DZ702
LED 7C515D8CR702
R703
D710500
D9C
S6582
C704
DZ701
STOP
R704565
PROCEDURE
PC BOARD WELD TIME
OVER
D708C728
500D9C
R705C705
500D9C
+ 5
4
X707
B 6
1
2 A
X707
3
515D8CR713LED7D
R712
D714
R711+
CR4
CURRENT 528
500
C707
D9C
D709
687
SHUT-
DOWNC4M
R708
515D8CD715
566
PROCEDURE
PC BOARDD716
BURNBACK
TIME OVERC729 500
D9C
9
13 D
F X706
X706 128
P7
2
1 X702
A
X702 B
4
5 3
6 11
EX706
10 584S
START TIME
INITIATE CURRENT
588
}PROCEDURE
PC BOARD
L701
12
A X706
515
D8C
R714
637C2M
VOLTAGE
PRESENT
R715R716
Q701
D717 +
C709
DZ703
R717515D8CLED 7JDZ704
C712
S4
INCH DOWN 592
R718
592C3K
500D9C
1
DX705
2 1
2
X703A 3
3FX705
4P5
P10
692
N.D. X701
D
13
12 11691
N.D.
R710C711 500D9C
D
X707
13
12 11
8
10
9 C
X707
11
E
10
X705
694
109
N.C.
X701
C 8
PROCEDURE
PC BOARD START TIME
OVER WELD TIME
OVER
583S
X701X701 B
A
1
2 3
4 5
6
+C708
500D9CR709P6
P2
X702
D
12
13 11
PROCEDURE
PC BOARD CRATER
TIME OVER
BURNBACKTIMEINITIATE
583C
3 B
4
X706
P9
12
13
X704
D X704
C
11
109
8
5
4
X703X704
A
B
1
2
3
6
9
10 X703
C
12
13 X703
D 118
693
N.D.
DZ705 LED
7E13 AX705
12N.B.
.047 MFD CR6
470
OHMS
500D9C
689
10
9 C
X702
8
5CX705
6
584C
CRATER TIME PROCEDURE
PC BOARD
INITIATE
P1 5
CX706
6 P4
690
N.D.
R738
C725
D726
Q709 560
PRESET
MONITOR
ENABLE
515
D8CR737
PROCEDUREPC BOARD
R735
D725R736
C724
Q708 530
C4D
500
D9C HOLD-LOW
DISABLE
R742
C727500D9C
R741
X705
8
B
9 Q711
564
WELDPROCEDURE
ENABLE PROCEDURE
PC BOARD
R721
C719500A7H
Q702
R720
D718
CR2
D722
LED 7H
TRAVELR722
610
A7E
589
R726
C721500A7H
Q704
R725
D720CR3
D723
LED 7K
POWER
R727
610A6G682
R
LT1
ELECTRODE
HOT
R734
C723
Q707 688
500
D9C
R733 SHUTDOWN
ENABLE
C5K
C5E N.E.
R740
C726Q710
563
500D9C
DZ706
PROCEDURE
PC BOARD 561
STRIKE PROCEDURE DISABLER739
STRIKE
ENABLE
PROCEDURE
R724
C720500A7H
Q703
D719CR5
610A6G681
R723 CURRENT
ARC CONTROL
ENABLE
R729
C722500A7H
Q705
D721CR1
D724
LED 7GR730
610A6G585
FLUX OR WATER
R728
P3
X704 B
5 4
6
587A3K
FEED
FORWARD
R731
R732
C710500D9C
S3
INCH
UP
586B7J
FEED
ENABLE
R1001D1002
D1004
C1001
+ CR
1001
D1001
D1003SWITCH
D1005 24V SIG.
START
R1002D1007
D1009
C1002
+ CR
1002
D1006
D1008SWITCH
D1010 24V SIG.
SIGNAL
COMMOMR1003D1012
D1014
C1003
+ CR
1003
D1011
D1013SWITCH
D1015 24V SIG.
R1004D1017
D1019
C1004
+ CR
1004
D1016
D1018SWITCH
D1020 24V SIG.
SIGNAL
COMMOM
STOP
INCH UP
INCH DOWN REMOTE INTERFACE
OPTION
RED
VAC
24
RED
D1021 D1023
D1024
D1022500D9C
592 CR
1004D7A
COMMON SWITCH
586 CR
1003D7J582 CR
1002D3A581A CR
1001D1A
F1001COMMON 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
+
P8
CLEVELAND, OHIO U.S.A.
  
  1-12-96D  
   L6682-4  
C701 4.7/35C702
C703
C704
C705
C706
C707
C708
C709
C710
THRU
C729
D701
THRU
D712500/50
.047/100
10/25
D714
THRU
D717
D718
THRU
D721
D722
THRU
D726 .22/100
10/25
.047/100
10/25
10/25
}
}
}
}
}.022/25
1A, 400V
1A, 400V
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
470
15K
470
4.7K
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 CONTROLSHAVING A COMMON CODE NUMBER.ELECTRICAL SYMBOLS PER E1537
COMPONENTS NOT ON P.C. BOARD
TIC 22V 600mA SECONDARY
(PRIMARY SHOWN ON SCHEMATIC A)
S3
S4
S5
S6}
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 WITHLATER 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 SWITCHSTOP AFTER CRATER TIME
START WITH START SWITCHSTOP AFTER BURN-BACK TIME
691
692 P6
P5
691 692 P6
P7
691
692 P7 P5
691
692 P6
P9
691
692 P6
P8
TO PIN  NO.
LEAD
 NO.
METHODS OF BURNBACK
WIRE FEED STOP WITH
CONTACTOR DELAY
INCH UP WITH
CONTACTOR DELAY 690
693 P4
P3
690
693 P4
P1
INCH UP WITH NO
CONTACTOR DELAY 690
693
P2
P1
WHEN OPTIONAL
PROCEDURE MODULE
IS INSTALLED IN
CRATER RECEPTACLE
D712
LED 7B
515D8CFOR 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 Cir
cuit Boar
d Components are not a
vailab
le fr
om 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.
Return to Section TOC Return to Section TOCReturn to Section TOC Return to Section TOC
Return to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC 
						

							G-4
ELECTRICAL DIAGRAMS
NA-5
LOGIC PC BOARD (L6242-2 & above) SCHEMATIC
321
3
4
SWITCH #2
44
1
4
234
1234
4
4
SWITCH #1
SWITCH #22
Inch up with no contactor
delay
Methods of Burnback
1 1SWITCH #2
3
SWITCH #2
4
3
12
4
4
D30
1.00K
R36
X6714
1.50KR38
D33
50V.022C3
D34
4011X2147
C17
D35
4011X4147
4011X1147
C18
X5714
C16
C15
4011X3147
C28
100R50
X8
6
5
J55
LED 7J
D31
50V.022C2
4.735VC9
J31
47.5K
R16
X6
12
13
221KR15
F
100R35
D17
Q12N4401
500
C29
500
500
515
515
515
500
500
500
515
INCHS4DOWN
592
C
PROCEDURE
PC BOARD583C
PRESENT VOLTAGE50V.022C14
Q162N4403
LED 7E
100K
R58
J54
100R49
7.68KR46
J35
7.68KR48
X8
4
3
Q102N4401
50V.022C23
J392.67K
R28Q172N4403
475R32
C33
2.67KR23
515500
500
515
515
A
587
FEED FORWARD(TO POWER P.C. BOARD)B
STRIKEPROCEDUREENABLE
563563
688ENABLESHUT DOWNENABLEARC CONTROL
DISABLESTRIKE PROCEDURE561
B
A
TIMEINITIATECRATERTIME OVERBURNBACK
X2
4
5
6
J3
4
X4
4
5
6
1W5.1VDZ1
J36
C341.50K
R47
22.1KR45
Q152N4401100K
R57
22.1KR33
C35
C36
E
Q72N4401
X2
3
21
C B
X4
3
21
B
PC BOARD
PROCEDURE
Q142N4403
C26
15.0KR34
X3
3
21
X5
6
5
X21213
11
X4
11
1213
7.68KR44
X8
2
1
J26
S16
12
11
5
X6
10
11
22.1KR39
X6
4
3
J3
7
X6
6
5
X6
8
9
50V.022C4
682
7.68KR43
CURRENT
C37
S28
109
7
X5
10
11
D26
500
681
1A1N40071000V
D191A1N40071000VD20
2.67KR25
D25
J13
68.1KR27
100KR56
500Q82N4401
50V.022C21
50V.022C24
CR5
500
6.81KR37
2N5657Q4
J16
SOURCEPOWEROUTPUT
J23
515500515
C
D
D
689OHMS470
N.B.
PC BOARD
PROCEDURE
INITIATECRATER TIME
584C
A
CR6
E
N.F.-4
CR3
LT1
R
HOTELECTRODE
ENABLEHOLD-LOW
N.D.
530
7.68KR41
1A1N4004400VD23
100K
R62
Q132N4403
22.1KR42
LED 7K
515
515
515
500
515
500
500500
100 R17J33
D32
LED 7C
START
D27
581A
J24
J25
475R19
D15
22.1KR18
D8
D9
1.00K
R5
22.1KR24
4.735VC5
1.50KR11
D10
J32
D16
D13
2974
515
515
500
515
500
500515
500
515
515
LED 7B
DISABLE
687
BURNBACKTIME OVER
SHUT DOWN
566
565WELD TIME
OVER
PROCEDURE PC BOARD
528CURRENTCR4STOPS6
B
A
582
15.0KR29
N.A.581
J52
LED 7D
D28
D14
1.50K
R13
100
R12
1025VC7
475R4
J21
100R6
1.50KR3C6
D12
D11
1.00KR2D29
475
R14
J51S5START
G
N.F. SCHEMATIC SHOWN WITH DIP SWITCHES IN THE UP POSITION.
1A1N40071000V
D18
X5
8
9
50V.022C27
10.0KR40
Q112N4401
X5
2
1
C31
CIRCUITRY OF CONTROLS HAVING A COMMON CODE NUMBER.
J41
J56
X2
10
8 9
C32
BYPASS KIT (ALSO SEE SCHEMATIC A)
7.68KR53
X156
4
X1
10
8
9
100K
R55
Q182N4403
Q122N4403
X121
3
Q92N4401
100K
R54
PER CHARTS BELOW
68.1KR22
50V.022C19
J14
J11
2N5657Q2
LED 7H
J42
J38
50V.022C25
N.C.  DIP SWITCHES ARE TO BE SET TO SUIT APPLICATION
100K
R63
N.B.  COMPONENTS INCLUDED WITH OPTIONAL LINC-FILL
2.67KR20
515500
515
500
515
500
1A1N4004400VD22
A
A
N.F.-1
560
PC BOARD
PROCEDURE
ENABLEMONITORPRESET
CR2
564PROCEDURE
PC BOARD
TRAVEL
589
PROCEDUREENABLEWELD
610
CYCLEN.A.  SWITCH (SEE PROCEDURE P.C. BOARD SCHEMATIC)NOTES:DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS ORN.E. SINCE COMPONENTS OR CIRCUITRY ON A PRINTEDCIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THEINTERCHANGEABILITY OF A COMPLETE BOARD, THISIS USED WITH LATER VOLTAGE BOARDS.EARLIER VOLTAGE BOARDS. ARC CONTROL ENABLEN.D.  HOLD-LOW DISABLE IS USED WITH G1556-1 ANDMUST BE IN STRIKE POSITION TO START WELD
500
500
X3
4
5
6
S2
6
12
11
5
X31213
11
D5
J22
D6
D2
D1
B1
(HS)
IN
7815
OUT
GNDX9
J46
J43
X8714
100V.22C1
C30
500
T1C     BLU
X38 9
10
515
4.735VC13
B2
LED 7A
D7
D3
D4
50050VC12
515
N.F.
B C
D
-3
C
A C
SUPPLYPOWERLOGIC
628
BLU22VAC
1.50KR1
4011X7147
PROCEDURE
PC BOARD
515
X78 9
10
S12
1615
1
500
S14
1413
3
475R9
475R1050V.022C11
1025VC8
X6
2
1
S18
109 7X71213
11
22.1KR52
X5
4
3
22.1KR51
X1
11
1213
J44
500N.F.
N.F.
-2
-1
-3
-4
N.F.
N.F.
A
D
PC BOARD PROCEDURE588
D
INITIATESTARTTIME584S
CURRENT
C
PC BOARD
PROCEDURE
D B
OVER
START TIMEOVER
WELD TIME
C
B583S
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY
Chge.Sht.No.
ELECTRICAL SYMBOLS PER E1537
UNLESS OTHERWISE SPECIFIED)
GENERAL INFORMATION
MFD
NONE
SUBJECT
CLEVELAND, OHIO U.S.A.
ON 3 PLACE DECIMALS IS + .OO2
SCALE
RESISTORS = Ohms (
(
UNLESS OTHERWISE SPECIFIED)
CAPACITORS =
.022/50V
DIODES =
1A, 400V
(UNLESS OTHERWISE SPECIFIED)1/4W
FILENAME:  G2974_2DA  MAB
9-27-94
SHT.
LOGIC CIRCUIT
DATE
WITH PUBLISHED STANDARDS
G
ON ALL ANGLES IS + .5 OF A DEGREE
DR.
MATERIAL TOLERANCE (t) TO AGREE
NA-5
NO.
CHK.
SUPSDG.
2974
THE LINCOLN ELECTRIC CO.
TYPE
THE LINCOLN ELECTRIC CO.
THE LINCOLN ELECTRIC CO.
EQUIP.
LOGIC POWER SUPPLY DISTRIBUTION AND BYPASSING
J45
50V.022C22
Q62N4401
J53
50V.022C10
100K
R59
22.1KR31
UNLESS OTHERWISE SPECIFIED TOLERANCEON 2 PLACE DECIMALS IS + .O2ON HOLES SIZES PER E-2056
500ENABLEFEEDS3INCHUP586
500
J12
18
6337X-
R-7K9Q-LED-
2
35
S-5
1
B-J-2DZ1-
2
68.1KR30LED 7G
1A1N40071000VD21
100K
R612N5657Q5
1A1N4004400VD2450V.022C20
J15500
500
PCBPROCEDURE
CR1585
AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS PERMI\
SSION OF
EARTH GROUND CONNECTION POWER SUPPLY SOURCE POINTFRAME CONNECTIONCOMMON CONNECTIONSUPPLY
VOLTAGE NET
X721
3
2N5657Q3
S22
16
15
1
D-
LABELS
LAST NO. USED
X756
4
100K
R60
C-
METHODS OF TRAVEL & BURNBACK.NA-5 SHIPPED CONNECTED FOR INDICATED
2SWITCH #121
3
SWITCH #121
3
1
3
SWITCH #1
3
Yes
2
23
1SWITCH #1SWITCH #1
44
SWITCH #2
3
12
4
3
12
current
Start/stop with weldStart/stop with switches
Methods of Travel
3
12
4
3
12
SWITCH #2
32SWITCH #11
3
WATEROR
FLUX
No
contactor delayWire feed stop with
delay
Inch up with contactor
SWITCH #12
receptacle)
Start with start switchStop after burn-back time(Optional proceduremodule installed in crater
SWITCH #1SWITCH #11
3
1
(Optional procedureStart with start switchmodule installed in craterStop after crater timereceptacle)Start with weld currentStop with stop switch
1
637
21
3
4
SWITCH #2
4
4
SWITCH #22
Optional Crater Module Installed?
21
3
4
SWITCH #2
4
SWITCH #2
500
515
515
1-12-96D 
G-4
NOTE:
Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Cir
cuit Boar
d Components are not a
vailab
le fr
om 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.
Return to Section TOC Return to Section TOCReturn to Section TOC Return to Section TOC
Return to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC 
						

							G-5
ELECTRICAL DIAGRAMS
NA-5
POWER PC BOARD (L6252-1) SCHEMATIC
6682-1    
Chge. Sht. No.  11-20-81G 
   9-7-84A  
  5-18-92N  
  9-11-92J  
  3-31-94E               
            
            
            
                                      
            
            
            
                                     
            
            
            
                                     
            
            
            
            
t
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON HOLE SIZES PER E2056
ON 2 PLACE DECIMALS IS   .02
WITH PUBLISHED STANDARDS.
ON 3 PLACE DECIMALS IS   .002
ON ALL ANGLES IS   .5 OF A DEGREE MATERIAL TOLERANCE ( ) TO AGREEEQUIP.
TYPE
SUBJECT
DR CHKREF.
SUPSDG SHT.
NO.THE LINCOLN ELECTRIC CO.THIS SHEET CONTAINS PROPRIETARY INFORMATION
 
  OWNED BY
AND IS
NOT TO BE REPRODUCED, DISCLOSED OR USED
THE LINCOLN ELECTRIC CO.
L
WITHOUT THE EXPRESS PERMISSION OF
CR7
666
CR6
D2G
GND532 25
S2
TRAVEL
531
S1A
CONTROL POWER AND
EMERGENCY STOP
531TRAVEL
RECEPTACLE
AUTO
OFF
HAND
CR2 D1K
C1104
C1105
531 87
FLUX OR
CB1
531A
CR1
D6K
87TP102
F101R1TP101
C101
PT
102B
R104
C104SCR 102 631R103
C102
SCR
101
PT
103BR101627
C1106
C1105
LEDLED
1C
1D
R102
C103
WH
RED
626 F102 C121
532
D101
D102
C105 C106
PT101BPT101C
SCR SCR
103 104
D103R105
LED
1E
WIRE FEED
MOTOR
ARMATURE
BLU
BLK TO TACH
PICK-UP
P.C. BOARD
539 541
115 VAC INPUT
S1B
32
GND 532WATER SOLENOID
RECEPTACLE
WIRE FEEDMOTOR FIELD B2L
C119
PT101A
540
500 A6H
R112
C111 Q103C112
R111
PT102A
C110
QU101
Q102C120
R108R107
Q101
C122
500A6H
587
D6G
FEED
FORWARD
R113 R110
C109
R109C108
+
C107
500
A6H
R106525 A5H
2
4
D3K
CR3
532 531B
BLK
BLK RED
RED
115
VAC 18
18
VAC
VAC
T1A
D106 D107
C113
WHT
D104
D105
C114
+
INX101
OUT
GNDD108
C116 +D110
R114LED 1A
IN
X102 OUT
GND
C117
+ D111
R115LED 1B
D109DZ101
C115
525
+15V
ANALOG
510
ZERO-VOLT
REFERNCE
500
-10V
500RELAY
POWER SUPPLY ANALOG
POWER SUPPLY FEED DIRECTION CIRCUIT
ARMATURE SUPPLY
FIELD SUPPLY
610
LED 1FR116
D113
D112
D114
C118TP
103
ORG
T2A115
VAC
ORG
BLK
BRN
115
VAC
T2B
BLK
VAC
24
INTERFACE OPTION
POWER SUPPLY
C101
C102
C103
C104
C105
C106
C107
C108
C109
C110
C111
C112
C113
C114
C115 .15/200
.047/100
.022/25
.022/25
.022/25
.22/100 .15/200
.047/100
.022/25
POWER P.C. BOARD
C116
C117
C118
C119
C120
C121
C122 .005/1400
50/250
.047/100
4.7/35
500/50
500/50
4.7/35
18/15
.02/600
.047/100
.022/25
.02/600
.022/25 D101
16A, 400 V
D102
D103
D104
THRU
D111
D112
THRU
D115
16A, 400 V
16A, 400 V
1A, 400 V
DZ101 5.1 V., 1 2 W
/
F101 /
1 2A SLOW BLOW,
1 2A SLOW BLOW, POWER SUPPLIES FUSE
/
F102
FIELD FUSE
LED 1A
LED 1F THRU RED LIGHT
EMITTING
DIODE
PT101
PT103 1:1:1
PULSE
TRANSFORMER
PT102 Q101
Q102
Q103
QU101
2N4123
2N5816
2N5816
UJT
R101
R102
R103
R104
R105
R106
R107
R108
R109
R110
R111
R112
R113
R114
R115
R116 40, 12W
68K
100
100
10K, 2W
100
10K
47K
4.7K
6.8K
680
47K
680
4.7K
3.3K
68K SCR 101
8A, 600V
SCR 102
SCR 103
SCR 104 8A, 600V
16A, 400V
16A, 400V
TP101
TP102
TP103 150V, 10J
X101 +15V VOLTAGE
REGULATOR
X102 -5V VOLTAGE
REGULATOR
.0047/3000
C1101
C1102
C1103
C1104
C1105
C1106.0047/3000
.0047/3000 ARC VOLTAGE BY-PASS
(SEE SCHEMATIC C)
FLUX SOLENOID BY-PASS
MOTOR FIELD BY-PASS
R.F. BYPASS P.C. BOARD
CB1
CR1
CR2
CR3
CR6
CR75A. CIRCUIT BREAKER
SPST, N.O. FLUX OR WATER
SPST, N.O. TRAVEL
SPST, N.O. POWER SOURCE OUTPUT
SPST, N.O. SOLID STATE, OPTIONAL
LINC-FILL PILOT RELAY
OPTIONAL LINC-FILL BY-PASS CONTACTOR
R1
S1
S2
T1A 2, 50W
EMERGENCY STOP
SPDT, TRAVEL
36 VCT, 300mA SECONDARY
T1B 10 VAC, 600mA SECONDARY
T1C
T2A
T2B 115VAC, 80mA SECONDARY
24VAC, 30mA SECONDARY COMPONENTS NOT ON P.C. BOARD
KEY TO SYMBOLS
INPUT CONTROL CABLE CONNECTION
POWER SUPPLY SOURCE POINTCOMMON CONNECTION TO ANALOG POWER
A5H
SCHEMATIC LOCATION REFERENCE HORIZONTAL CO-ORDINATE LETTER
VERTICAL CO-ORDINATE NUMBER
CODE NUMBER.CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE 
SINCE COMPONENTS OR CIRCUITRY ON A PRINTED
INTERCHANGEABILITY OF A COMPLETE BOARD, THIS 
DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS
 OR CIRCUITRY OF CONTROLS HAVING A COMMONA.N.S.I. ELECTRICAL SYMBOLS PER E1537UNLESS OTHERWISE SPECIFIED, COMPONENT VALUES OF: CAPACITORS = MFD/VOLTSRESISTORS  = OHMS, 1 2 WATT/
1
2
3
4
5 6
7 A
B C
DEF G
H J
KL M
FOR NA-5 CONTROL CODES
84008993          NA-5 SCHEMATIC          
           POWER CIRCUIT          
DAD            NONE    6682-1       10-3-81  
       
 7-2-92             
THE LINCOLN ELECTRIC CO.CLEVELAND, OHIO U.S.A.
EQUIP.
TYPE
SCALE SUBJECT
DR DATE
CHKREF.
SUPSDG SHT.
NO.
L
            
            A
31
1A, 1000 V
PT103A
SCHEMATIC IDENTIFICATION LETTER
DPST, CONTROL POWER AND
SEE LOGIC SCHEMATIC D
D115
BRN +
YLW
T1B
VAC 10YLW
601
METER
SUPPLY
602
SUPPLY; 510
SCHEMATIC FOR COMPONENT VALUES AND CIRCUIT CONNECTIONS. FOR POWER P.C. BOARDS L6252-2 OR HIGHER USE L8956  
FOR R.F. BYPASS P.C. BOARDS M14133-1 OR 
HIGHER USE S20995 SCHEMATIC FOR 
COMPONENT VALUES AND CIRCUIT CONNECTIONS.
G-5
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Cir
cuit Boar
d Components are not a
vail
-
ab
le fr
om 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.
Return to Section TOC Return to Section TOCReturn to Section TOC Return to Section TOC
Return to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC 
						

							G-6
ELECTRICAL DIAGRAMS
NA-5
POWER PC BOARD (L6252-2 & above) SCHEMATIC
CR1
OFF
TRAVEL
AUTOHAND
S1B
CR7
626
666CR6
S2
FOR THE NA-5R ONLY:BURNBACK KIT IS CONNECTED TO 631 AND 532.
631
AND CR2 ARE REMOVED ON THE NA-5R.
MOTOR ARMATUREWIRE FEED
18
115 VAC
531B532
WIRE FEED
3000.00473000.0047
BLK
531BREDMOTOR FIELDWHT
500P1
J36P1
J31P1
J35
-10V500
500
POWER SUPPLYRELAY
500
500
J24
25
2
GND
SHOWN WITH JUMPERPLUG INSTALLEDNA-5R OPTIONAL BURNBACK 4 404
123654
402
532
RECEPTACLE WHICH IS DRAWN BELOW.THECR3 IS SHOWN IN THE OPTIONAL BURNBACK KIT
L
TRAVELRECEPTACLE532
THE TRAVEL RECEPTACLE,THE TRAVEL SWITCH,4 2CR3
GND
32
KIT RECEPTACLECR3
CONTROL POWER ANDEMERGENCY STOP
S1A
31115VACINPUT8956
531
531
531
GND
3000.0047
C22
16A400VD2
539
LED1D
16A400VD1
500
525
UNLESS OTHERWISE SPECIFIED)(UNLESS OTHERWISE SPECIFIED)
UNLESS OTHERWISE SPECIFIED)LABELSC-
D- R-
541
ELECTRICAL SYMBOLS PER E1537
MBLUE
1/4W.022/50V
GENERAL INFORMATION
(
DIODES =RESISTORS = Ohms (1A, 400V
MFDCAPACITORS =24
EQUIP.
22
POWER SUPPLY SOURCE POINT
EARTH GROUND CONNECTION
COMMON CONNECTIONFRAME CONNECTION
LAST NO. USED
VOLTAGE NET
540
NA-5,NA-5R
J140.5A125V
F250250VC3
P1J11
12W40R1
LED1C
133KR2
627
133KR18
LED1E
150V45JTP1
200V.15C2
1400V.0047C1
0.5A125V
F1
0.2mHPT1
12
SHT.
J25
LSUPSDG.
SUBJECT
NO.
P1J33
0.2mHPT2
12
8956
15
100V.047C5
2N6398SCR1
200V.15C4
TYPE
SUPPLY
631
0.2mHPT3
12
600V.02C21
100R3
2N6403SCR3
2N6403SCR4
BLACK
16A400V2W10K
R5
FEED FORWARD
D3100V.047C19
6.81KR10
13.7KR20
4.735VC7
2N6027QU1
231
P1
J13
4.75KR9
C24
332R21
P1
J16
100R6
0.2mHPT1
56
100V.047C6
100R4
J21
0.2mHPT1
34
2N6398SCR2
LED1F
133KR16
D9
1N4007D12
1N4007D15GND
IN
OUT
X2
B3B4
D7
D6
B5
1N4007D13
1N4007D14
610
150V45JTP3
J26
600V.02C18
LED1BLED1A
D10
50050VC15
D11
4.735VC16
50050VC14
500610
ARMATURE SUPPLY
B1
D4
133KR17
1815VC17
D5
3.32KR15
(HS)
IN
7815
OUT
GNDX1
1W5.1VDZ1
100V.22C13
B2
4.75KR14
D8
BRN24VAC
T2B
532
10 VAC
531BT2A
YLW
BLK
602601YLW
BLK
BRN
115 VAC532
BLK
T1B
METERVAC
CANADA
ORG115ORGRED
AUSTRALIA
POWER SUPPLYINTERFACE OPTION
FRANCE
87
FLUX OR WATER
R1
SOLENOID RECEPTACLE
2 OHMS50 WATTS
531A
CB1
531A
631
.00473000
VAC
CR2
T1A
SUPPLY
J23
J22
150V45JTP2
VACWHT18REDFIELD SUPPLY
40V600mAQ9
0.2mHPT3
3440V600mAQ3
1.50KR19
C20
681R11
P1
J38P1J34
10KR7
100V.047C8
40V600mAQ1P1
J39
P1J32
47.5KR8
C12
0.2mHPT2
34
C9
33.2KR22
C10
C11
40V600mAQ2
500
510525
NONESCALECHK.DATE
Chge.Sht.No.
DR.
47.5KR12
THE LINCOLN ELECTRIC CO.CLEVELAND, OHIO U.S.A.
K.K.
ON ALL ANGLES IS + .5 OF A DEGREEON 3 PLACE DECIMALS IS + .OO2ON HOLES SIZES PER E-2056UNLESS OTHERWISE SPECIFIED TOLERANCEON 2 PLACE DECIMALS IS + .O2
WITH PUBLISHED STANDARDSMATERIAL TOLERANCE (t) TO AGREE
N.A.   SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHAN\
GE
CIRCUIT
ANALOG
REFERENCE
POWER SUPPLY
FIELD DIRECTION
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON C\
ODEWITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGR\
AM MAY
NUMBER.
NOTES :
P1J37
587
510 510ZERO VOLTANALOG
525+15V525
5/12/92
POWER P.C. BOARD SCHEMATIC
G-6
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Cir
cuit Boar
d Components are not a
vail
-
ab
le fr
om 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.
Return to Section TOC Return to Section TOCReturn to Section TOC Return to Section TOC
Return to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC 
						

							G-7
ELECTRICAL DIAGRAMS
NA-5
VOLTAGE PC BOARD SCHEMATIC
6682-3    
Chge. Sht. No.  9-27-85E  
  11-14-86L 
   3-6-92B  
  7-10-92A  
   3-25-94     11-17-95G 
            
            
            
                                      
            
            
            
                                     
            
            
            
                                     
            
            
            
            
t
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON HOLE SIZES PER E2056
ON 2 PLACE DECIMALS IS   .02
WITH PUBLISHED STANDARDS.
ON 3 PLACE DECIMALS IS   .002
ON ALL ANGLES IS   .5 OF A DEGREE MATERIAL TOLERANCE ( ) TO AGREEEQUIP.
TYPE
SUBJECT
DR CHKREF.
SUPSDG SHT.
NO.THE LINCOLN ELECTRIC CO.THIS SHEET CONTAINS PROPRIETARY INFORMATION
 
  OWNED BY
AND IS
NOT TO BE REPRODUCED, DISCLOSED OR USED
THE LINCOLN ELECTRIC CO.
L
WITHOUT THE EXPRESS PERMISSION OF
C501
.022/25 .47/50
.47/50 DZ502
/
L501 R501
27K
15K
2.2K
2.7K
4.7K
100K
2.7K S7B
COMPONENTS NOT ON P.C. BOARD
KEY TO SYMBOLS
COMMON CONNECTION TO ANALOG POWER
SUPPLY 510
A5H
SCHEMATIC LOCATION REFERENCE
HORIZONTAL CO-ORDINATE LETTER
VERTICAL CO-ORDINATE NUMBER
CODE NUMBER.CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE 
SINCE COMPONENTS OR CIRCUITRY ON A PRINTED
INTERCHANGEABILITY OF A COMPLETE BOARD, THIS 
DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS
 OR CIRCUITRY OF CONTROLS HAVING A COMMONA.N.S.I. ELECTRICAL SYMBOLS PER E1537UNLESS OTHERWISE SPECIFIED, COMPONENT VALUES OF: CAPACITORS = MFD/VOLTSRESISTORS  = OHMS, 1 2 WATT/
1
2
3
4 5
6
7 B
CD
E
F
G HJ
KL M
FOR NA-5 CONTROL CODES
84008993          NA-5 SCHEMATIC          
          VOLTAGE CIRCUIT         
DAD            NONE    6682-3       10-5-81  
       
 7-2-92             
THE LINCOLN ELECTRIC CO.CLEVELAND, OHIO U.S.A.
EQUIP.
TYPE
SCALE SUBJECT
DR DATE
CHKREF.
SUPSDG SHT.
NO.
L
            
            C
39/20
4.7/35 L502 500 TRIMMER
1K
100K
15K
330K
22K
3.3KR526
VOLTAGE P.C. BOARD
47K
47K
22K
100K
27K
10K
100
10K
56K
27K DM601
DIGITAL METER
SPDT, VOLTS SET-ACTUAL
NOTES:
C601
500/50
4.7/35
.022/25
1A, 400V
R601
R602
R603
X601 2.80K, 1/4W, 1%
A
A5H
635
SETTING
C506
D
-
+
6
5 X501
CONTROL 
AMP
7
A
-
+
2
3X502
X502
R514
R540
637D5A
500A6H
Q503C528
R531
687D4B
R602 R601CAL
CW
4
R603
TP4
C603
E C
DM601
1
2
C602
+OUT
IN
X601
GND
+
C601
601
602
A6E
A6E
D602D604
D603D601
510
B7G
TP5
+5V
510PB3C
VOLTMETER VOLTMETER
POWER SUPPLY
ACTUAL
SET
S7B
VOLTS
SET-ACTUAL
9147
N.B.
C504
C505
C506
C507
C508
C509
C510
C511
C512
C513
C514
C516
C517
C518
C519
C520
C521
C522
C523
C524
C525
C526
C527
C528 .1/100
4.0/50
.022/25
.022/25
.022/25
1.8/20
27/35
4.7/35
.022/25
39/20
.0047-.005/1400
.022/25
.022/25
.022/25
.022/25
.022/25
.01/200 4.7/35
.47/50
.022/25 D501
THRU
D522
1A, 400V
DZ503
DZ504
DZ505
DZ506
DZ507 6.8V, 1 2W
5.1V, 1/2W    
20V, 1W 
15V, 1W  6.2V, 1/2W 
6.8V, 1/2W 
33uH, 110mA
33uH, 110mA
OCI501
OCI502 OPTO-ISOLATOR
Q501
Q503
Q505
Q506
Q507
Q508
X501
X502 2N4123
2N5816
2N4123
2N4857
2N5816
2N5816
QUAD OP-AMP
QUAD OP-AMP R502
R503
R504
R505
R506
R507
R508
R509
R510
R511
R512
R513
R514
R515
R516
R517
R518
R519
R520
R521
R522
R523
R524
R52544.2K, 1/4W, 1%
4.75K, 1/4W, 1%
100K
10K
1K
2K TRIMMER
5.6K
100K
39K 
56K 
27K
R527
R528
R529
R530
R531
R532
R533
R534
R535
R536
R537
R538
R539
R540
R541
R542
R543
R544
R545
R546
R547
R548
R549
22K 
27K
1K
33K
5K TRIMMER
1K, 12W
470
68K
15K
15K
270
270
100
270 F501
 1 8 AMP FAST
/
BLOW FUSE 
SWITCH 
SBS501
T501
24 VAC, 185 mf
SECONDARY
TP501 150V, 10J VOLTMETER P.C. BOARD
C602
C603
C604
D601 .022/25
D602
D603
D604 24.3K, 1/4W, 1% 
2K TRIMMER
+5V VOLTAGE REGULATOR INPUT CONTROL CABLE CONNECTION
N.A.  THESE CAPACITORS ARE LOCATED ON THE R.F. BYPASS BOARD.
(SEE SCHEMATIC A).
N.B.  SEE L6682-3A SCHEMATIC FOR 
BOARD.
SUPERSEDED G1556-1 VOLAGE 
N.C.  EARLIER VOLTAGE BOARDS DO NOT HAVE THIS RECEPTACLE, AND
LEAD 688A WAS 688.C1102
C1101 N.A.
+-
ARC
VOLTAGE
POLARITY
TERMINALS
F501
L502 L501
667
621
C519510PB3CR503 R502 R501C501
D502
CW
A
+ -
13
12 114
14
C521
500A6HC520525A5H
C524
+
500A6H
B
+ -
9
10 8
R504C504
510PB3C
X501 R547
C523
ACTUAL VOLTAGEMETER FILTERC
-
+ R546
517
C604
A
518
3 2
X501
1 514
C510
+
510PB3C
SET VOLTAGEBUFFER
VOLTAGE
PROCEDURE
P.C. BOARD
E2E
516
R537525
ACTUAL VOLTAGE BUFFER
D501D503
DZ
503
+C505
R505
D504
R539
R532
D516
R506
D505
R535
R507
1+
+ C518
C508R509
R510C507D506
PIN S
PIN F
WELD
RESPONSE JUMPER
(RED)
R518
Q506
525A5H
R516
R517
C517 +
500A6H
D508
R508
HOLD - LOW CIRCUIT
4231
688 525
A5H
D4J
688A
ARC CONTROL
ENABLE
N.C.
VOLTAGE P.C. BOARD RECEPTACLE FOR
BOARD (SHOWN WITH JUMPER PLUGOPTIONAL PULSED POWER FILTER P. C.
INSTALLED.)
10
9 +
  B
- 8
D517Q501
R515
START
CW
R512
GAIN CW
R538
R511
R519
+
+
C512
D514
PIN
PIN
PIN
A B D
D510
D511
R521
R523R520 R522
R524525A5H
C511
R525 D507
C
+
- 4
5
6 11
D509
688
D4J
500A6H
C522
X502
7
SHUTDOWN ENABLE
SHUTDOW CIRCUIT
525A5H
R533
R534 A
B
R513
1 OCI501
2 6
45
DZ 504 C509
C
POWER SOURCE
CONTROL INTERFACE
C513 +R549
SHUTDOWND518
SBS
501
R530
BYPASS
AUTOCOM
500D9C
Q508
Q507R529R536
R528
DZ
507
D515
D
+
- X502
R526525A5H
R527
+
C526
R545510PB3C
R544
AUTO-STOP CIRCUIT
AUTO-STOP AND
SHUTDOWN BYPASS
TAB JUMPER (BLUE)
START
RESPONSE
JUMPER
(WHITE)
R541DZ
506
D520
D519
T501
115 VAC
531B
532
A5D
A5D
24
VAC
D521 D522
R548510PB3C
R543
R542C525
510D513
592D7A
0CI502 C527
5
4
6
2
1
TP
501
C516 D512
SCHEMATIC IDENTIFICATION LETTERDZ502
D514 12
13 14
S7B
FROM
OPTION AND
FOR VOLTMETER P.C. BOARDS
L6685-1 OR HIGHER USE S21143
SCHEMATIC FOR COMPONENT
VALUES AND CIRCUIT CONNECTIONS.
SILICON BILATERAL 
G-7
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Cir
cuit Boar
d Components are not a
vail
-
ab
le fr
om 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.
Return to Section TOC Return to Section TOCReturn to Section TOC Return to Section TOC
Return to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC 
						

							G-8
ELECTRICAL DIAGRAMS
NA-5
CONTROL CIRCUIT SCHEMATIC
6682-2    
Chge. Sht. No.  11-9-90D  
  7-19-91J  
   3-6-92B  
  5-15-92N  
  7-10-92A               
            
            
            
                                      
            
            
            
                                     
            
            
            
                                     
            
            
            
            
t
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON HOLE SIZES PER E2056
ON 2 PLACE DECIMALS IS   .02
WITH PUBLISHED STANDARDS.
ON 3 PLACE DECIMALS IS   .002
ON ALL ANGLES IS   .5 OF A DEGREE MATERIAL TOLERANCE ( ) TO AGREEEQUIP.
TYPE
SUBJECT
DR CHKREF.
SUPSDG SHT.
NO.THE LINCOLN ELECTRIC CO.THIS SHEET CONTAINS PROPRIETARY INFORMATION
 
  OWNED BY
AND IS
NOT TO BE REPRODUCED, DISCLOSED OR USED
THE LINCOLN ELECTRIC CO.
L
WITHOUT THE EXPRESS PERMISSION OF
C201 .022/25
.047/100
.022/25
.022/25 .15/200 18/15
18/15
4.7/35
18/15
.022/25
D201
THRU
D206
D208
1A, 400 V DZ201
6.8 V., 1 2 W.
/
Q201 2N4123
2N4123
2N4123 R201
15K
10K
33K
10K
270
15K
47K
15K
100K
X201
OCI301 TACHOMETER P.C. BOARD
S7A
COMPONENTS NOT ON P.C. BOARD
KEY TO SYMBOLS
POWER SUPPLY SOURCE POINTCOMMON CONNECTION TO ANALOG POWER
A5H
SCHEMATIC LOCATION REFERENCE
HORIZONTAL CO-ORDINATE LETTER
VERTICAL CO-ORDINATE NUMBER
CODE NUMBER.CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE 
SINCE COMPONENTS OR CIRCUITRY ON A PRINTED
INTERCHANGEABILITY OF A COMPLETE BOARD, THIS 
DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS
 OR CIRCUITRY OF CONTROLS HAVING A COMMON UNLESS OTHERWISE SPECIFIED, COMPONENT VALUES OF:
CAPACITORS = MFD/VOLTSRESISTORS  = OHMS, 1 2 WATT/
1
2
3
4
5
6
7 B
C
DEFG
HJ
KL M
FOR NA-5 CONTROL CODES
91479338          NA-5 SCHEMATIC          
          CONTROL CIRCUIT         
DAD            NONE    6682-2       10-4-81  
       
 7-2-92             
THE LINCOLN ELECTRIC CO.CLEVELAND, OHIO U.S.A.
EQUIP.
TYPE
SCALE SUBJECT
DR DATE
CHKREF.
SUPSDG SHT.
NO.
L
            
            B
C202
C203
C204
C205
C206
C207
C208
C209
C210
C211
C212
C213
C214
C215
C216
C217
THRU
C229 .022/25
4.7/35
.0033/200
.47/50
4/50
4.7/35
100pf/100
DZ202
DZ203
3.0 V., 1 W.
L201
L202 330 uH, 110mA
Q202
Q203
Q204
Q205
Q206
Q207 2N4125
BS170
2N4123
2N5816
2N6027
QU201
VOLTAGE REGULATOR
X202
X203
X204 F- TO -V CONVERTER
QUAD OP-AMP
QUAD OP-AMP R203
R204
R205
R206
R207
R208
R209
R210
R211
R212
R213
R214
R215
R216
R217
R218
R219
R220
R221
R222
R2231K
500 TRIMMER
1.00K, 1/4W, 1%
2.94K, 1.4W, 1%
100K TRIMMER
1K
1K
1K
33K
50K TRIMMER
15K
10K TRIMMER
33K
R224
R225
R226 100K
10K 1K R227
CONTROL P.C. BOARD
R228
R229
R230
R231
R232
R233
R234
R235
R236
R237
R238
R239
R240
R241
R242
R24315
1M
10 6.8K
10K
20K TRIMMER
27K
100
6.8K
2.7K
10K
15K
10K
15K
5.6K
15K
270 Q301
R301
R302
R304
OPTO-INTERRUPTER
2N4123
1K
15K
1.3K
DM401
DIGITAL METER
SPDT SPEED SET-ACTUAL
NOTES:
N.A.  511 IS CONNECTED TO 511A BY CONNECTION TO 
VOLTAGE P.C. BOARD.
N.B.  THESE COMPONENTS ARE LOCATED ON POWER P.C.
BOARD (SEE SCHEMATIC A).
SPEEDMETER P.C. BOARD
C401
C402
C403
THRU
C409
500/50
4.7/35
.022/25
D401
D402
D403
D404 1A, 400V
X401 +5V VOLTAGE REGULATOR
R401
R402
R403
R404
R405
R406
R407
R408
R409
R410
R411
R412
R413
R414 2K TRIMMER
2K TRIMMER
5K TRIMMER
5K TRIMMER
5K TRIMMER
5K TRIMMER 17.8K, 1/4W, 1% 
2.80K, 1/4W, 1% 
18.2K, 1/4W, 1% 
33.2K, 1/4W, 1% 
52.3K 1/4W, 1%
10
31.6K, 1/4W, 1% 
51.1K, 1/4W, 1% 
+
R201
C204
C201
5
6
X201
525A5H
A5H510A6H500
+
C214
C202
4
13
101211 23 Q207
R205
R203R204
R243
+
C203 520
+10.00V
510P
R209
R206525A5H
C216
R207
L201 525
525AA5H
555
L202
510A
TO TACH PICK-UP
P.C. BOARD
TACH SIGNAL CONVERTER
C221
9 8
10
5
11
1
12 2 3
4
X202
C205
C206
R210
R208
CW
CAL
+
A
C217
C212
C218
500
A
2
3
+-
4
11 R211 512
B4E
A6H B4J
R217
ACTUAL SPEED BUFFER
C213
C215
510P
B
13
12 +-
R242511
B4E
B3C B5J
SPEED
632
PROCEDURE
PC BOARD
E2D
SETTING
SET SPEED BUFFER
X203
+ 14511
C228R218
R221
R238
C208
D
-
+
6
5X203
R222
CONTROL  AMP
+10.00 V
REFERENCE SUPPLY
7
CW
HI A
-
+
2
3 1
C219
4
X204
+
C210
C220
R226
D208
C223R227D205 Q203
R228R239
R230
R229
D206
C224
LO
CWQ204R231
C211
500A6H
R233
R235
C229
QU201
C225
R234
DZ202Q205
DZ203
C227
R237
R236
628D8AQ206
R232540
PT
101A
C119A1H
N.B
ARMATURE FIRING CIRCUIT
D204
B
-
+ X204
R225
8
9
10
500A6H
Q202
C222
R224
DZ201 525A5HR223
D203
FEED ENABLE CIRCUIT
R212
R214
C
-
+ X203 8
9
10
R240
R241
512
511
B1G
B3G
FAST-SLOW
ACCELER JUMPER
PINS
PIN
F
CW
ACC
R220 R219+C207
D201
R215
R216C226
D202 Q201525A5HR213
586D7J
FEED
ENABLE
ACCELERATION CIRCUIT
R413 R414
C409
CAL
CW
142T
R411
R412
C408
CAL
CW
95S
R408
R409
C407
CAL
CW
142
R406
R407
C406
CAL
CW
R404
R405
C405
CAL
CW
R401
R402
C404
CAL
CW
57F
95
57
4
R403TP4
C403
R410E
C
DM401
1
2
C402
+OUT
IN
X401
GND
+
C401
601
602
A6E
A6E
D402
D404
D403D401
510C7E
TP5 +5V
510PB3CSPEEDMETER SPEEDMETER
POWER SUPPLY
519
ACTUAL
SET
S7A
SPEED
SET-ACTUAL
SPEEDMETER
CALIBRATION
JUMPER
511
512
B3G B1G
7
X203
1
511A
N.A.
C209
11
SCHEMATIC IDENTIFICATION LETTER
16.0 V., 1 W. SUPPLY; 510
ELECTRICAL SYMBOLS PER E1537.
AND
FROM OPTION
G-8
NOTE:
Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Cir
cuit Boar
d Components are not a
vail
-
ab
le fr
om 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.
Return to Section TOC Return to Section TOCReturn to Section TOC Return to Section TOC
Return to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC 
						

							G-9
ELECTRICAL DIAGRAMS
NA-5
PROCEDURE PC BOARD  SCHEMATIC
563
520
PCBL
565564
N.E.
SPEEDWELD
N.E.
515
500
500
515
500
520
515
500
J94
J102
J1011
J109
J106
J1015
J1012
J1013
J1014
J108
J95
J104
J101
26.7KR16
C9
J96
J103
4.75KR17
5.62KR7
X1
1
2
13
10K2WCWR8
C7
J19
11
X1
10
11
12
C5
J19
10
C4
332R9
4.735VC8
600mA40VQ2
5.62KR4
MC14060X216847.5KR18
10K2WCWR5
4066BX1147
X1
4
3
5
X1
9
86
515
J85
J86
J81
J82
J84
J83
J107
520
VOLTSSTRIKEN.E.
SCREW, FOR ESD.
STRIKE MODE SETTINGS
+10V
B
+5V
+10V
-10V
+5V
-10V
-10V
TO PIN P8.NUMBER.
NOTES :
NOT INSTALLED.
WELD MODE SETTINGS
+5V
A
N.E.
1.82KR6
WELD PROCEDURE ENABLE
560
PROCEDURE KITLOGICPCB
8754LOGICFRAME
581A564A581
584S
OUTPUT561
RECEPTACLE
SPEED
CRATER
N.D.
-10V
500515
+5V
655
515
I
N.C.584
632
655 655
SELECTOR
PRESET MONITOR ENABLE
566583S584C
588
SUPPLIES
583C
ON LOGIC PCBPCBFROM REFVOLTAGE ONLOGICFROM LOGICCONTROL PCBPOWER
START MODULEOPTIONAL OPTIONAL
WELD TIMER  MODULE
D12
J186J19
13
J185
8
16
Q7Q14Q13
MC14060
Q9OUT2Vdd
Vss
RESQ10Q8
Q6Q12Q5
CLK
Q4
OUT1
X2
1314
15
1011129
7
65 4312
J181
N.A.   SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHAN\
GEN.C.   A JUMPER PLUG CONNECTS 584C TO 583C WHEN THE OPTIONAL START MODUL\
E IS
510P
562
O
500
583
515
588A
655
520
OPTION BOARDTIMER BOARD
POWER SUPPLY DISTRIBUTION
NOT INSTALLED.  ALSO, LOGIC CIRCUIT 694 LEAD MUST BE MOVED FROM PIN P10
CD
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON C\
ODE
N.B.   A JUMPER PLUG CONNECTS 584S TO 583S WHEN THE OPTIONAL START MODUL\
E IS
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGR\
AM MAY
500
TIMER BOARD515
655
O
I
515
562
500
655
I
CRATER  MODULE
632
635
588
N.D.   564  IS CONNECTED TO 564A BY A LEAD RECEPTACLE JUMPER PLUG, WHICH\
 ISN.E.   R2, R5, R8, R11 AND S1 ARE CONNECTED TO FRAME BY PCB TRACES AND M\
OUNTING
REMOVED WHEN THE OPTIONAL MULTI-PROCEDURE KIT IS INSTALLED.
AND BYPASSING
OPTIONAL
-10V
BURNBACK TIMER
D2
D3
STRIKE
+10V
LED3
D4
1/2W10MR20
D7
D11
100V47pC3
C1S134
25
C2S1910
8
11
J183
635
562
OPTION BOARD
+5V
DIGITAL TIMERSN.E.
-10V
STRIKE PROCEDUREDISABLE
START
WELD+5V
STRIKE
WELD
PRESET MODE
START
STRIKE
B
CRATER
STRIKE
A
STRIKE PROCEDUREENABLE
START DISABLEWELD PROCEDURE ENABLESTART DISABLE
1.6384MHzY1
LED2
J1914
J184J194
D1
100V22pC2LED1D5
10K2WCWR2
600mA40VQ1
5.62KR1
C6
47.5KR14
26.7KR15
267R3
4.75KR13
D10
LED4
D6
D8
2.21KR19
D9
N.E.VOLTS
TO SET
ON 2 PLACE DECIMALS IS + .O2
ON CONTROL PCBSPEED BUFFERTO SETVOLTAGE BUFFER
632635
ON HOLES SIZES PER E-2056
ON VOLTAGE PCB
WELD
Chge.Sht.No.
10-29-91
21
SCHEMATIC
EARTH GROUND CONNECTION
LAST NO. USED
POWER SUPPLY SOURCE POINTCOMMON CONNECTION
SHT.NO.L8754
VOLTAGE NET
NA-5 PROCEDURE
FRAME CONNECTION
129
FILE:  L8754_3DB
SCALE
MFD
1A, 400VDIODES =RESISTORS = Ohms (
NONE
(
THE LINCOLN ELECTRIC CO.CLEVELAND, OHIO U.S.A.
GENERAL INFORMATIONELECTRICAL SYMBOLS PER E1537CAPACITORS =
CHK.
(UNLESS OTHERWISE SPECIFIED)
UNLESS OTHERWISE SPECIFIED)
UNLESS OTHERWISE SPECIFIED).022/50V1/4WC-
EQUIP.
SUBJECTTYPE
SUPSDG.
UNLESS OTHERWISE SPECIFIED TOLERANCE
MATERIAL TOLERANCE (t) TO AGREEON 3 PLACE DECIMALS IS + .OO2ON ALL ANGLES IS + .5 OF A DEGREE
DR.DATEFMWITH PUBLISHED STANDARDS
SUPPLYLABELSD- R-
1.82KR125.62KR10
10K2WCWR11
515
J116
J198J196J199J182J191J197
J114
J192J1915J193
J91
J93
O
J1114
J92
J1115
1815VC1
J1111
J1113
J118
J1112
J119
J112
J111
J117
J113
J195
500520
500
515
500
515
520
TIMER BOARD515
510P520 500515
BURNBACK TIME OVERSTART TIME OVER/WELD TIME INITIATECRATER TIME INITIATECRATER TIME OVER/BURNBACK TIME INITIATECURRENTWELD TIME OVERSTART TIME INITIATE
+10V
584N.B.
I
500
O
1.6384 MHzTEST POINT
FORTIME BASE100 HzTIME BASE
+5V
510P
588
588A
562
583
520
TIMER BOARD
+10V
500-10V
7.68KR21
3-6-92B 
7-10-92N
7-12-96N
G-9
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Cir
cuit Boar
d Components are not a
vail
-
ab
le fr
om 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.
Return to Section TOC Return to Section TOCReturn to Section TOC Return to Section TOC
Return to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC 
						

							G-10
ELECTRICAL DIAGRAMS
NA-5
OPTION & TIMER PC BOARD  SCHEMATICS
6682-5    
Chge. Sht. No.   9-7-84A  
  1-31-86A  
  7-11-86D  
   3-6-92B  
  7-10-92A               
            
            
            
                                      
            
            
            
                                     
            
            
            
                                     
            
            
            
            
t
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON HOLE SIZES PER E2056
ON 2 PLACE DECIMALS IS   .02
WITH PUBLISHED STANDARDS.
ON 3 PLACE DECIMALS IS   .002
ON ALL ANGLES IS   .5 OF A DEGREE MATERIAL TOLERANCE ( ) TO AGREEEQUIP.
TYPE
SUBJECT
DR CHKREF.
SUPSDG SHT.
NO.THE LINCOLN ELECTRIC CO.THIS SHEET CONTAINS PROPRIETARY INFORMATION
 
  OWNED BY
AND IS
NOT TO BE REPRODUCED, DISCLOSED OR USED
THE LINCOLN ELECTRIC CO.
L
WITHOUT THE EXPRESS PERMISSION OF
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/
1
2
3
4
6 B
C
DE
F
G
H J
K L
M
FOR NA-5 CONTROL CODES
84008993          NA-5 SCHEMATIC           CIRCUIT                           
DAD            NONE    6682-5       10-2-81          7-2-92             
THE LINCOLN ELECTRIC CO.CLEVELAND, OHIO U.S.A.
EQUIP.
TYPE
SCALE SUBJECT
DR DATE
CHKREF.
SUPSDG SHT.
NO.
L
            
            E
A
SCHEMATIC IDENTIFICATION LETTER
X902
C903 8
16
515
500D6C
D9C
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 CONTROLSHAVING A COMMON CODE NUMBER. N.C.  X905 AND C906 ARE USED ONLY ON 100 SECOND 
TIMER BOARDS.  BOARD JUMPER IS USED ON 10 
 SECOND TIMER BOARDS. COMMON CONNECTION TO ANALOG POWER SUPPLY
OPTION P.C. BOARD
C001
THRU
C004
R001
R002
R003
R004
R005
R006
R007
R008
R009
R010
R011
R012
THRU
R016
R017
R018 .022/25
5.6K
330
5.6K
1.8K
4.7K
47K
27K
22K
47K 10K, 2W MULTI-TURN POT
10K, 2W MULTI-TURN POT
22K, 1/4W
1K
1K Q001
Q002
X001
X002
D001
THRU
D004
2N 4125
2N 4123
QUAD ANALOG 
SWITCH
QUAD 2 INPUT
NAND GATE
1A, 400V
C902
THRU
C906
.022/25
C907 100pf/100
D901
D902 1A, 400
1A, 400
R901
THRU
R915
R916 22K, 1/4W
1K
X901
X902
THRU
X904
X905 X906 QUAD 2-INPUT NAND GATE
PROGRAMMABLE
DIVIDE-BY-N
COUNTER
3 DIGIT BCD THUMBWHEEL
SWITCH
TIMER P.C. BOARD
X903
8
16
X904
8
16
X905
8
16
C906
C904
X001
1312
1312
721
X901
C90214 N.C.
X0027
14
C003
515
500D8C
D9C
14 117
1021
C001
520
510PB1C
B3CR016 X002
A
6
5R013
OVER
TIME INITIATE
CURRENT 588
584
0
515
D8C
21X002
B
R014 4
3
R017
R015
C004 500
R018
D9C
D003 515D8C
500
B1C
D004
D001 515
D8C500D9C
D002
TIME
OVER
583
R012
12 13
C
X002
11
9
8
X002
D 10
R010R011Q002
520
C002
R007
R008
R009Q001
510PB3C
500D9C
R003 R002 R001
SPEED CW
4
A
X001
B3F632
35
C4A635X001B
9
68
CW
R004
R005
R006VOLTS
PROCEDURE
ENABLE
562
OPTION BOARD
588A
5
7
8
9
D8C515 3
R905
R904 R903
R902
515D8C
S901A
MOST SIGNIFICANT DIGIT 214
11 5DP1
DP2
DP3
DP4 X902
13
CF
PE
C
0
INH MR
500D9C
104
12
6
Q1
Q2
Q3
Q4
1
15 9 7
3
R906
515D8C
S901B
214
11 5DP1
DP2
DP3
DP4 X903
13
CF
PE
C
0
INH MR
500D9C
104
12
6
Q1
Q2
Q3
Q4
1
15 9 7
500D9C
6
3
R910
515D8C
S901C
214
11 5DP1
DP2
DP3
DP4 X904
13
CF
PE
C
0
INH MR
500D9C
104
12
6
Q1
Q2
Q3
Q4
1
15 9 7
R907R908
R909
LEAST SIGNIFICANT DIGIT
R911
R912
R913
10
A
X901
8
9
R915
515
I
INITIATE R901D8C
TIMER BOARD
3214
11 5DP1
DP2
DP3
DP4 X905
13 C
0
INH MR 104
12
6
Q1
Q2
Q3
Q4
1
15 9 7
515D8C
500D9C
R914
655
100 HZ TIMEBASE OUTPUT
FROM
PROCEDURE
PC BOARD
5
6 X901
B 4
OVERO
D902D901
R916 515D8C500D9C
N.C.
D9C
C907
ELECTRICAL SYMBOLS PER E1537
FOR OPTION P.C. BOARD L6246-2
OR HIGHER USE M16795 SCHEMATIC
FOR COMPONENT VALUES AND
CIRCUIT CONNECTIONS.
POWER SUPPLY DISTRIBUTION AND BYPASSING
G-10
NOTE:
Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Cir
cuit Boar
d Components are not a
vail
-
ab
le fr
om 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.
Return to Section TOC Return to Section TOCReturn to Section TOC Return to Section TOC
Return to Master TOCReturn to Master TOCReturn to Master TOC Return to Master TOC