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G-4
LOGIC PC BOARD (L6242-2 & above) SCHEMATIC
515
515
515
LED 7B
D12
D11
1.00K
1.50K
START
DISABLE
J2
581
581A
1
R6
100
N.A.
C6
S5
D13
START
500
500
500
515
515
LED 7C
D10
515
1.00K
1.50K
D15
582
D32
J2
4
R17
100
D27
S6
D9
STOP
500
J2
687
5
500
SHUT DOWN
D8
D16
J3
565
2
WELD TIME
OVER
PROCEDURE
PC BOARD
515
515
J3
566
3
1.50K
BURNBACK
TIME OVER
15.0K
D28
LED 7D
3
R12
X6
B
D14
100
J5
C7
10
2
25V
528
500
CURRENT
5
X6
C
CR4
500
11
10
R32
X6
E
475
515
515
515
475
15.0K
D29
D30
221K
J5
637
Q1
1
R35
R15
2N4401
100
VOLTAGE
PRESENT
C2
C9
D31
.022
D17
4.7
50V
35V
47.5K
500
500
515
1.00K
J5
592
5
S4
INCH
DOWN
500
515
14
14
14
14
C15
C16
C17
X1
X2
X3
X4
C14
.022
4011
4011
4011
4011
50V
7
7
7
7
500
LOGIC POWER SUPPLY DISTRIBUTION AND BYPASSING
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.
515
22.1K
583S
22.1K
J4
PROCEDURE
4
R52
PC BOARD
START TIME
WELD TIME
OVER
OVER
16
1
R4
3
4
A
3
X5
B
X7
1
475
2
6
4
X7
B
5
S1
-2
3
14
N.F.
13
11
4
13
X1
B
12
S1
-1
N.F.
15
2
16
1
515
22.1K
13
11
X7
C
12
R19
475
475
C5
4.7
475
35V
500
C11
C8
.022
10
50V
25V
515
500
500
22.1K
9
10
1
2
X7
D
X6
A
8
C4
S1
-4
N.F.
N.F.
.022
12
11
10
7
50V
S1
-3
5
6
500
9
8
4
J3
588
PROCEDURE
6
7
PC BOARD
CURRENT
1
584S
J3
PROCEDURE
3
9
8
X2
B
X6
D
4
PC BOARD
2
START
TIME
INITIATE
6
4
X2
C
R39
5
22.1K
13
11
X2
D
12
CRATER
TIME OVER
BURNBACK
PROCEDURE
TIME
PC BOARD
INITIATE
J3
13
12
583C
1
X6
F
13
11
5
6
X4
C
X5
C
12
1
3
X3
A
2
515
515
LED 7J
D33
D34
1.50K
5
6
R50
X8
C
C3
100
.022
D35
50V
500
500
BLU
22VAC
14
14
14
14
T1C
BLU
C18
X5
C28
X6
C29
C30
X8
X7
4011
7
7
7
7
ELECTRICAL DIAGRAMS
J4
PROCEDURE
2
564
PC BOARD
WELD
PROCEDURE
ENABLE
9
10
1
2
X1
A
X5
A
R40
8
10.0K
Q11
C27
515
N.F.
2N4401
15
.022
50V
S2
-1
100K
2
500
C31
2N4403
R53
Q18
7.68K
515
Q9
2N4401
C32
1
C25
3
C
R41
2N4403
.022
X1
2
Q12
50V
7.68K
100K
J5
500
6
D26
4
X1
D
5
6
689
D25
584C
9
J4
PROCEDURE
10
9
8
D
X2
A
X5
1
PC BOARD
8
CRATER TIME
R42
INITIATE
22.1K
CR6
C24
100K
.022
50V
500
N.B.
515
C37
S2
-4
N.F.
2N4403
8
9
11
10
Q13
X5
E
R43
7.68K
7
10
R33
22.1K
515
C26
100K
C33
1
2
X8
A
R44
2N4403
Q14
7.68K
J3
PROCEDURE
561
6
PC BOARD
STRIKE PROCEDURE
DISABLE
DZ1
5.1V
100K
1W
515
1.50K
1
6
3
4
X4
A
X4
B
2
5
LED 7E
C35
Q16
R46
6
2N4403
4
9
7.68K
X3
B
Q15
5
10
N.F.
R45
X3
C
2N4401
8
12
11
22.1K
S2
-3
C34
5
6
R49
100
500
13
11
D
X3
12
D6
R31
22.1K
515
100K
D5
X9
J4
J2
628
2
6
515
IN
7815
OUT
(HS)
D2
D1
GND
1.50K
LOGIC
B1
C12
POWER
C1
500
SUPPLY
.22
C13
50V
D7
100V
4.7
35V
B2
LED 7A
D4
D3
J4
500
3
500
J4
500
5
1
J1
68.1K
CR2
1N4007
D18
1A
1000V
J1
LED 7H
4
D22
1A
589
400V
TRAVEL
1N4004
Q2
R20
2N5657
2.67K
J3
C19
560
PROCEDURE
.022
8
PC BOARD
50V
100K
PRESET
MONITOR
ENABLE
500
515
6.81K
68.1K
ELECTRODE
HOT
J2
530
3
LT1
R
CR3
HOLD-LOW
ENABLE
Q8
2N4401
J1
6
LED 7K
D20
D23
1A
1A
POWER
682
SOURCE
1000V
400V
OUTPUT
1N4007
1N4004
500
Q4
R25
2N5657
2.67K
C21
.022
50V
100K
SHUT DOWN
500
ENABLE
N.D.
J2
6
688
ARC CONTROL
ENABLE
Q7
2N4401
CR5
CURRENT
1N4007
J1
D19
1A
3
1000V
681
500
Q3
R23
2N5657
2.67K
J3
100K
9
563
C20
.022
J3
PROCEDURE
50V
5
563
PCB
STRIKE
Q10
PROCEDURE
2N4401
500
ENABLE
C23
.022
50V
500
515
C36
3
4
X8
B
R48
2N4403
Q17
7.68K
CR1
68.1K
J1
D21
5
1N4007
1A
LED 7G
1000V
2.67K
D24
J5
585
1A
FLUX
OR
WATER
4
587
400V
1N4004
(TO POWER P.C. BOARD)
FEED FORWARD
Q5
2N5657
100K
C22
.022
50V
J5
FEED
3
586
ENABLE
500
Q6
2N4401
S3
INCH
C10
UP
.022
50V
J1
GENERAL INFORMATION
500
2
ELECTRICAL SYMBOLS PER E1537
CAPACITORS =
500
RESISTORS = Ohms (
DIODES =
1A, 400V
FILENAME: G2974_2DA
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY
THE LINCOLN ELECTRIC CO.
THE LINCOLN ELECTRIC CO.
AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS PERMISSION OF
Ch'ge.Sht.No.
UNLESS OTHERWISE SPECIFIED TOLERANCE
THE LINCOLN ELECTRIC CO.
ON HOLES SIZES PER E-2056
1-12-96D
ON 2 PLACE DECIMALS IS + .O2
CLEVELAND, OHIO U.S.A.
ON 3 PLACE DECIMALS IS + .OO2
SCALE
ON ALL ANGLES IS + .5 OF A DEGREE
MATERIAL TOLERANCE ("t") TO AGREE
DR.
MAB
DATE
WITH PUBLISHED STANDARDS
G-4
610
NOTES:
N.A. SWITCH (SEE PROCEDURE P.C. BOARD SCHEMATIC)
MUST BE IN "STRIKE" POSITION TO START WELD
CYCLE
N.B. COMPONENTS INCLUDED WITH OPTIONAL LINC-FILL
BYPASS KIT (ALSO SEE SCHEMATIC A)
N.C. DIP SWITCHES ARE TO BE SET TO SUIT APPLICATION
PER CHARTS BELOW
N.D. HOLD-LOW DISABLE IS USED WITH G1556-1 AND
EARLIER VOLTAGE BOARDS. ARC CONTROL ENABLE
IS USED WITH LATER VOLTAGE BOARDS.
N.E. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED
CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE
INTERCHANGEABILITY OF A COMPLETE BOARD, THIS
DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS OR
CIRCUITRY OF CONTROLS HAVING A COMMON CODE NUMBER.
N.F. SCHEMATIC SHOWN WITH DIP SWITCHES IN THE "UP" POSITION.
Methods of Travel
1
2
3
4
1
2
3
4
Start/stop with switches
SWITCH #1
SWITCH #2
1
2
3
4
1
2
3
4
Start/stop with weld
current
SWITCH #1
SWITCH #2
1
2
3
4
1
2
3
4
Start with weld current
Stop with stop switch
SWITCH #1
SWITCH #2
Start with start switch
1
2
3
4
1
2
3
4
Stop after crater time
(Optional procedure
module installed in crater
receptacle)
SWITCH #1
SWITCH #2
Start with start switch
1
2
3
4
1
2
3
4
Stop after burn-back time
(Optional procedure
module installed in crater
receptacle)
SWITCH #1
SWITCH #2
Optional Crater Module Installed?
1
2
3
4
1
2
3
4
Yes
SWITCH #1
SWITCH #2
No
1
2
3
4
1
2
3
4
SWITCH #1
SWITCH #2
Methods of Burnback
1
2
3
4
1
2
3
4
Wire feed stop with
contactor delay
SWITCH #1
SWITCH #2
1
2
3
4
1
2
3
4
Inch up with contactor
delay
SWITCH #1
SWITCH #2
1
2
3
4
1
2
3
4
Inch up with no contactor
delay
SWITCH #1
SWITCH #2
NA-5 SHIPPED CONNECTED FOR INDICATED
METHODS OF TRAVEL & BURNBACK.
LAST NO. USED
R-
63
Q-
18
B-
2
DZ1-
1
C-
37
7K
J-
5
MFD
(
.022/50V
UNLESS OTHERWISE SPECIFIED)
LED-
LABELS
D-
35
9
S-
2
1/4W
UNLESS OTHERWISE SPECIFIED)
X-
(UNLESS OTHERWISE SPECIFIED)
SUPPLY
VOLTAGE NET
POWER SUPPLY SOURCE POINT
COMMON CONNECTION
FRAME CONNECTION
EARTH GROUND CONNECTION
EQUIP.
NA-5
TYPE
LOGIC CIRCUIT
SUBJECT
NONE
SHT.
G
9-27-94
2974
CHK.
SUP'S'D'G.
NO.
NA-5
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Troubleshooting
