G-3
ELECTRICAL DIAGRAMS
NA-5
LOGIC PC BOARD (L6242-1) SCHEMATIC
R707
R706
581
S801A
DISABLE
START
500
D9C
START
S5
581A
N.A.
C706
DZ702
LED 7C
515
D8C
R702
R703
D710
500
D9C
S6
582
C704
DZ701
STOP
R704
565
PROCEDURE
PC BOARD
WELD TIME
OVER
D708
C728
500
D9C
R705
C705
500
D9C
+
5
4
X707
B
6
1
2
A
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
9
13
D
F
X706
X706
12
8
P7
2
1
X702
A
X702
B
4
5
3
6
11
E
X706
10
584S
START
TIME
INITIATE
CURRENT
588
}
PROCEDURE
PC BOARD
L701
1
2
A
X706
515
D8C
R714
637
C2M
VOLTAGE
PRESENT
R715
R716
Q701
D717
+
C709
DZ703
R717
515
D8C
LED 7J
DZ704
C712
S4
INCH
DOWN
592
R718
592
C3K
500
D9C
1
D
X705
2
1
2
X703
A
3
3
F
X705
4
P5
P10
692
N.D.
X701
D
13
12
11
691
N.D.
R710
C711
500
D9C
D
X707
13
12
11
8
10
9
C
X707
11
E
10
X705
694
10
9
N.C.
X701
C
8
PROCEDURE
PC BOARD
START TIME
OVER
WELD TIME
OVER
583S
X701
X701
B
A
1
2
3
4
5
6
+
C708
500
D9C
R709
P6
P2
X702
D
12
13
11
PROCEDURE
PC BOARD
CRATER
TIME OVER
BURNBACK
TIME
INITIATE
583C
3
B
4
X706
P9
12
13 X704
D
X704
C
11
10
9
8
5
4 X703
X704
A
B
1
2
3
6
9
10
X703
C
12
13
X703
D
11
8
693
N.D.
DZ705
LED
7E
13
A
X705
12
N.B.
.047
MFD
CR6
470
OHMS
500
D9C
689
10
9
C
X702
8
5
C
X705
6
584C
CRATER
TIME
PROCEDURE
PC BOARD
INITIATE
P1
5
C
X706
6
P4
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
8
B
9
Q711
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
R
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
P3
X704
B
5
4
6
587
A3K
FEED
FORWARD
R731
R732
C710
500
D9C
S3
INCH
UP
586
B7J
FEED
ENABLE
R1001
D1002
D1004
C1001
+
CR
1001
D1001
D1003
SWITCH
D1005
24V SIG.
START
R1002
D1007
D1009
C1002
+
CR
1002
D1006
D1008
SWITCH
D1010
24V SIG.
SIGNAL
COMMOM
R1003
D1012
D1014
C1003
+
CR
1003
D1011
D1013
SWITCH
D1015
24V SIG.
R1004
D1017
D1019
C1004
+
CR
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
CR
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
+
P8
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
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 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)
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 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
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
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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