Logic Pc Board (L6242-1) Schematic - Lincoln Electric NA-5N Service Manual

G-3

LOGIC PC BOARD (L6242-1) SCHEMATIC

LED 7B
PROCEDURE
515
D8C
START
D712
DISABLE
R706
581A
581
S801A
DZ702
N.A.
C706
S5
START
565 D708
PROCEDURE
500
PC BOARD
D9C
WELD TIME
515
OVER
D8C
LED 7C
D710
C728
582 R703
DZ701
C704
S6
STOP
500
D709
D9C
515
PROCEDURE
D8C
PC BOARD
687
SHUT-
LED7D DOWN
C4M
X706
D
R712
528 8
+ 9
D714
CR4
C707
X706
CURRENT
F
13 12
500
515 D9C
D8C
L701 X706
637
VOLTAGE
A
PRESENT
1 2
C2M
515
Q701
D8C
D717 +
C709
LED 7J
DZ703
592
X705
C3K
592 R718
D
1 2
C712
S4
DZ704
INCH
DOWN
500
D9C
FOR LOGIC P.C. BOARDS L6242-2 OR HIGHER USE G2974 SCHEMATIC FOR
COMPONENT VALUES AND CIRCUIT CONNECTIONS.
LOGIC P.C. BOARD
C701 .22/100 DZ701 16V, 1W R704
C702
500/50 DZ702 16V, 1W R705
C703 4.7/35 DZ703 3V, 1/2W R706
C704 .047/100 DZ704 16V, 1W R707
C705 10/25 DZ705 3V, 1/2W R708
C706 .047/100 DZ706 5.1V, 1/2W R709
C707 10/25 L701
5.6mH, 28mA R710
C708 10/25 LED 7A R711
C709
10/25 THRU R712
} RED
C710 LED 7E R713
LIGHT
THRU .022/25 LED 7G R714
EMITTING
C729 LED 7H R715
} DIODE
D701 LED 7J R716
THRU 1A, 400V LED 7K
R717
D712 Q701 2N 4123 R718
} }
D714 Q702 R720
THRU 1A, 400V THRU 2N 5657 R721
D717 Q705 R722
} }
D718 Q706
R723
THRU 1A, 1000V THRU 2N 4123 R724
D721
Q711 R725
}
D722 R701 4.7K R726
THRU 1A, 400V R702 4.7K R727
D726 R703 100
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.
583S
PC BOARD
START TIME WELD TIME
OVER
OVER
X705 P10
X701
9
F C 8
10
3 4
694
P5
1 X707 N.C.
3
A
2
X705
692
X701
13
E
D
11 11 10
N.D.
12
4 X707
6
B
5
+
C705
691
500
D9C N.D.
500
P6 P8
D9C
13 X707
515
D 11
12
D8C
C711 C708
566
500
500
BURNBACK D715 D9C
TIME OVER D716
D9C X707
10
C 8
9
500
C729
D9C
P7
588
}
PROCEDURE
CURRENT
X706
X702 PC BOARD
584S
2 E
A
3 11 10
START
1
TIME
INITIATE
X702
4
B 6
5
12 X702
D 11
CRATER 13
TIME OVER
BURNBACK
P9
TIME X706
PROCEDURE INITIATE
B
PC BOARD 3 4
583C
X704 X704
13
9
C 8
D 11
10
12
N.D.
2
X703
A
3
1
47K R728 2.7K
470 R729 1.5K
100 R730 68K
4.7K R731 22K
47K
R732 47K
470 R733 22K
470 R734 47K
15K R735 22K
470 R736 47K
4.7K R737
6.8K
4.7K R738 47K
100K R739 10K
22K R740 15K
4.7K R741 10K
100 R742 15K
2.7K X701
QUAD 2
1.5K
X702
INPUT
68K X703
NAND
2.7K X704
GATE
1.5K X707
2.7K X705 HEX
1.5K X706 INVERTER
68K X708 +15 V VOLTAGE
REGULATOR
ELECTRICAL DIAGRAMS
564
WELD
X705
PROCEDURE
B R741
8
9 ENABLE
Q711
C727
500
D9C
560
X705
1 X701
A PRESET
689
A 3 13 12
MONITOR
2
ENABLE
N.B.
Q709
C725
+
X701 515
5
B 6 500
CR6 D8C
4
.047
D9C
MFD
D726
500
D725
D9C
530
X705
584C
X702 PROCEDURE
C4D
10 C
R735
C 6 PC BOARD
5 CRATER
8 Q708
9
TIME
INITIATE
C724
500
D9C
X706
C 688
6
5
690
P4
P1
C5K
N.D.
R733 C5E
Q707
C723
500
D9C
561
PROCEDURE 563
PC BOARD Q710
STRIKE PROCEDURE
STRIKE
DZ706
DISABLE
PROCEDURE
R739
ENABLE
C726
P2
500
X704 X704
2 4 D9C
A 3 B 6
5
1
P3
LED
7E
X703 587
4
FEED
B 9 X703
6
FORWARD
5 C 8
10 A3K
586
FEED
DZ705
ENABLE
Q706
693
B7J
X703
12 R731
D 11
13 S3
INCH
C710
UP
500
D9C
CLEVELAND, OHIO U.S.A.
610
PROCEDURE
D1021 D1023
A6G
PC BOARD
24
RED
A7E VAC
D718
D1024
CR2
RED
LED 7H
TRAVEL D1022
D722
F1001
CR
589
1001
R720
581A
Q702
PROCEDURE
D1A
PC BOARD C719
500
SWITCH
CR
A7H
1002 COMMON
582
610
D3A
A6G
ELECTRODE
HOT
CR
1003
LT1 R
586
CR3
D720 D7J
HOLD-LOW
LED 7K
DISABLE D723
POWER
682
R725 SOURCE
Q704
OUTPUT
C721
500 CR
1004
A7H 592
SWITCH
D7A
610
SHUTDOWN N.E.
COMMON
ENABLE A6G
500
ARC CONTROL
D9C
ENABLE
CURRENT
CR5
D719
N.A. S801 (SEE PROCEDURE PC BOARD
SCHEMATIC) MUST BE IN "STRIKE"
681
POSITION TO START WELD CYCLE.
R723
Q703
N.B. COMPONENTS INCLUDED WITH
PROCEDURE
OPTIONAL LINC-FILL BYPASS KIT
PCB
C720 (ALSO SEE SCHEMATIC A).
N.C. LEAD 694 TO BE CONNECTED TO
500
PIN P10 IF OPTIONAL CRATER MODULE
A7H
(SEE SCHEMATIC E) IS INSTALLED, OR
610
TO PIN P8 IF REMOVED.
A6G
N.D. LOGIC BOARD JUMPER LEADS ARE TO
BE CONNECTED TO SUIT APPLICATION
PER CHARTS BELOW.
N.E. HOLD-LOW DISABLE IS USED WITH
G1556-1 AND EARLIER VOLTAGE BOARDS.
CR1
ARC CONTROL ENABLE IS USED WITH
LED 7G
D721
LATER VOLTAGE BOARDS.
D724
FLUX OR
585
METHODS OF TRAVEL
WATER
Q705
START-STOP
WITH SWITCHES
C722 START-STOP
WITH WELD CURRENT
500 START WITH WELD CURRENT
STOP WITH STOP SWITCH
A7H
START WITH START SWITCH
WHEN OPTIONAL
STOP AFTER CRATER TIME
PROCEDURE MODULE
IS INSTALLED IN START WITH START SWITCH
STOP AFTER BURN-BACK TIME
CRATER RECEPTACLE
METHODS OF BURNBACK
WIRE FEED STOP WITH
FOR REMOTE INTERFACE PC. BOARDS L6580-1
CONTACTOR DELAY
OR HIGHER USE S21207 SCHEMATIC FOR
COMPONENT VALUES AND CIRCUIT CONNECTIONS. INCH UP WITH
CONTACTOR DELAY
OPTIONAL REMOTE INTERFACE P.C. BOARD
INCH UP WITH NO
C1001 THRU C1004 2/50 CONTACTOR DELAY
SPDT, 24VDC
CR1001 THRU CR1004
FOR LEAD #694 CONNECTION SEE N.C.
D1001 THRU D1004 1A, 600V
NA-5 SHIPPED CONNECTED FOR INDICATED
1/8A FUSE
F1001 METHODS OF TRAVEL AND BURNBACK.
R1001 THRU R1004 150
KEY TO SYMBOLS
COMPONENTS NOT ON P.C. BOARD POWER SUPPLY SOURCE POINT
}
CR1 SPST 110 VDC RELAY COIL
SCHEMATIC LOCATION REFERENCE
CR2 (N.O. CONTACTS SHOWN ON
CR3 SCHEMATIC A) HORIZONTAL CO-ORDINATE LETTER
}
REED SWITCH ACTUATED BY
CR4 VERTICAL CO-ORDINATE NUMBER
WELDING CURRENT
}
SCHEMATIC IDENTIFICATION LETTER
OPTIONAL 110 VDC RELAY
CR5
UNLESS OTHERWISE SPECIFIED, COMPONENT VALUES OF:
COIL ACTUATED BY CR4
}
CAPACITORS = MFD/VOLTS
OPTIONAL LINC-FILL
CR6
RESISTORS = OHMS, 1 2 WATT /
SOLID-STATE PILOT RELAY
LT1 INDICATOR LIGHT
SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT
}
S3
BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGE-
S4 SPST PUSH BUTTON SWITCH
ABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT
S5
SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS
S6
HAVING A COMMON CODE NUMBER.
TIC 22V 600mA SECONDARY
(PRIMARY SHOWN ON SCHEMATIC A) ELECTRICAL SYMBOLS PER E1537
G-3
REMOTE INTERFACE
OPTION
R1001
D1001
D1002
CR
1001
D1004
+
D1003 C1001
SWITCH
24V SIG.
D1005
START
R1002
D1006
D1007
CR
SIGNAL
1002
COMMOM
+ D1009
D1008 C1002
SWITCH
24V SIG.
D1010
STOP
R1003
D1011
D1012
CR
1003
D1014
+
D1013 C1003
SWITCH 24V SIG.
D1015
INCH UP
R1004
D1016
D1017
CR
1004 SIGNAL
COMMOM
D1019
+
D1018 C1004
SWITCH 24V SIG.
D1020
INCH DOWN
LEAD TO PIN
NO. NO.
691 P6
692 P5
691 P6
692 P7
691 P5
692 P7
691 P6
692 P9
691
P6
692 P8
LEAD TO PIN
NO. NO.
P4
690
693 P3
690 P4
693 P1
690 P2
693 P1
1-12-96D
L6682-4
NA-5