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G-6
POWER PC BOARD (L6252-2 & above) SCHEMATIC
CONTROL POWER AND
EMERGENCY STOP
S1A
31
531
GND
CR7
666
115VAC
INPUT
CR6
32
S1B
GND
FOR THE NA-5R ONLY:
THE TRAVEL RECEPTACLE,THE TRAVEL SWITCH,
AND CR2 ARE REMOVED ON THE NA-5R.
CR3 IS SHOWN IN THE OPTIONAL BURNBACK KIT
RECEPTACLE WHICH IS DRAWN BELOW.THE
BURNBACK KIT IS CONNECTED TO 631 AND 532.
631
4
532
5
2
1
402
6
CR3
404
3
4
2
NA-5R OPTIONAL BURNBACK
KIT RECEPTACLE
SHOWN WITH JUMPER
PLUG INSTALLED
2
CR3
4
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 avail-
able 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.
CB1
531
531A
631
R1
2 OHMS
2
50 WATTS
FLUX OR WATER
SOLENOID RECEPTACLE
TRAVEL
RECEPTACLE
531
87
PT2
C4
0.2mH
.15
1
200V
5
1
GND
J2
J2
.0047
25
3000
531A
631
SCR1
SCR2
.0047
532
2N6398
2N6398
3000
TP1
PT3
150V
C2
0.2mH
45J
.15
200V
0.5A
125V
C1
CR1
.0047
1400V
AUTO
J1
W H T
4
.0047
627
OFF
3000
50
250V
CR2
S2
HAND
.0047
TRAVEL
J1
P1
3000
1
RED
626
0.5A
125V
J2
532
2
J2
TP2
150V
3
45J
531B
BLK
115 VAC
T1A
532
BLK
T1B
531B
BLK
T2A
115 VAC
532
BLK
T2B
ELECTRICAL DIAGRAMS
J3
P1
540
3
5
C19
PT1
.047
100V
0.2mH
6
500
C6
C5
.047
2
4
.047
100V
100V
J1
3
P1
BLUE
0.2mH
1
3
0.2mH
PT1
PT1
WIRE FEED
M
MOTOR ARMATURE
1
SCR3
SCR4
2N6403
2N6403
C21
P1
.02
BLACK
2
600V
6
J1
D3
FEED FORWARD
16A
400V
C3
R2
133K
R18
133K
D2
D1
16A
16A
400V
400V
ARMATURE SUPPLY
D8
FIELD SUPPLY
X1
IN
7815
OUT
(HS)
GND
C14
B1
RED
500
C16
50V
4.7
18
35V
VAC
B2
W H T
C13
18
.22
DZ1
100V
VAC
C17
5.1V
18
C15
1W
15V
RED
B3
500
50V
Y L W
601
GND
M E T E R
SUPPLY
IN
OUT
10 VAC
X2
602
610
Y L W
D9
J2
6
610
D12
D13
ORG
1N4007
1N4007
B4
115
C18
TP3
VAC
.02
150V
600V
45J
B5
ORG
D14
D15
1N4007
1N4007
BRN
500
INTERFACE OPTION
24
VAC
POWER SUPPLY
BRN
525
C24
C7
4.7
35V
3
1
QU1
2N6027
2
Q9
600mA
40V
C8
3
3
PT2
.047
PT3
0.2mH
100V
0.2mH
P1
2
4
4
J3
587
Q2
600mA
40V
Q1
Q3
600mA
600mA
40V
40V
525
+15V
FIELD DIRECTION
ANALOG
CIRCUIT
500
J3
P1
525
4
J3
P1
525
7
510
ANALOG
ZERO VOLT
REFERENCE
POWER SUPPLY
J3
P1
510
8
J3
P1
510
9
500
-10V
J3
P1
500
5
J3
P1
500
6
J3
P1
500
1
RELAY
POWER SUPPLY
J2
500
4
G-6
NA-5
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