Power Pc Board (L6252-2 & Above) Schematic - Lincoln Electric NA-5N Service Manual

G-6
POWER PC BOARD (L6252-2 & above) SCHEMATIC
CONTROL POWER AND
EMERGENCY STOP
31 S1A
531
GND
532
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
FLUX OR WATER 50 WATTS
SOLENOID RECEPTACLE
TRAVEL
RECEPTACLE 531 87 PT2
C4
0.2mH
.15
1 200V
GND 5 1
J2 J2
.0047
25
3000 531A 631
SCR2
SCR1
.0047
2N6398 2N6398
3000
TP1
PT3
150V 1
C2
0.2mH
45J
.15
200V
0.5A
125V
C1
CR1
.0047
1400V 2
AUTO
J1
W H T
4
.0047
627 C3
OFF
3000 50
250V
CR2
S2
.0047
HAND
TRAVEL P1 J1
3000
1
RED
626
0.5A
125V
J2
532
2
FIELD SUPPLY
J2
TP2
150V
3
45J
531B BLK
115 VAC
T1A
532
BLK
Y L W
601
T1B
602
Y L W
531B
BLK
T2A 115 VAC
532 BLK
BRN
T2B
BRN
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
SCR3 SCR4
2N6403 2N6403
C21
.02 P1
BLACK
600V
6
J1
D3
FEED FORWARD
16A
P1
400V
2
J3
587
R2
133K
R18
133K
D1 D2
16A 16A
400V 400V
ARMATURE SUPPLY
D8
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
1W
C15
15V
RED
B3 500
50V
GND
M E T E R
SUPPLY
IN OUT
10 VAC X2
610
D9
J2
6
610
D12 D13
1N4007 1N4007
ORG B4
115 C18
TP3
VAC .02
150V
600V
45J
B5
ORG
D14 D15
1N4007 1N4007
500
INTERFACE OPTION
24
VAC
POWER SUPPLY
525
C24
C7
4.7
35V
3 1
QU1
2N6027
2
Q9
600mA
40V
C8 3 3
PT2
.047
0.2mH PT3
100V
0.2mH
4 4
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
POWER SUPPLY
REFERENCE
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