Power Pc Board (L6252-1) Schematic - Lincoln Electric NA-5N Service Manual

G-5

POWER PC BOARD (L6252-1) SCHEMATIC

A
B
31
1
CR7
2
115 VAC 666
INPUT
CR6
3
D2G
32
4
GND
2
5
CR3
D3K
4
6
7
FOR POWER P.C. BOARDS L6252-2 OR HIGHER USE L8956
SCHEMATIC FOR COMPONENT VALUES AND CIRCUIT CONNECTIONS.
C101 .005/1400 D101
C102 .15/200 D102
C103 50/250 D103
C104 .15/200 D104
C105 .047/100 THRU
C106 .047/100 D111
C107 4.7/35 D112
C108 .047/100 THRU
C109 .022/25 D115
C110 .022/25
C111 .022/25 DZ101
C112 .022/25
C113 .22/100 F101
C114 500/50
C115 500/50 F102
C116 4.7/35
C117 18/15
C118 .02/600 LED 1A
C119 .047/100 THRU
C120 .022/25 LED 1F
C121 .02/600
C122 .022/25 PT101
PT102
PT103
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.
ELECTRICAL DIAGRAMS
C
D E
CONTROL POWER AND
CB1
S1A EMERGENCY STOP
531 R1
531A
FLUX OR
531 WATER SOLENOID
RECEPTACLE
TRAVEL
87
531
RECEPTACLE
C101
GND 25
532
AUTO
C1105 C1104
F101
87
OFF
TP101
S2
TRAVEL
HAND
C1106
CR2
C1105
CR1
D1K
D6K
S1B
532
TP102
D104
RED
BLK
531B
18
VAC
115 WHT
VAC
18
C113
VAC
532
BLK RED
T1A
D106
YLW
10
VAC
YLW
T1B
BLK ORG
115 115
VAC
VAC
TP
BLK 103
ORG
T2A BRN
24
VAC
BRN
T2B
POWER P.C. BOARD
FOR R.F. BYPASS P.C. BOARDS M14133-1 OR
16A, 400 V Q101 2N4123 SCR 101 8A, 600V
16A, 400 V Q102 2N5816 SCR 102 8A, 600V HIGHER USE S20995 SCHEMATIC FOR
16A, 400 V Q103 2N5816 SCR 103 16A, 400V
COMPONENT VALUES AND CIRCUIT CONNECTIONS.
QU101 UJT SCR 104 16A, 400V
1A, 400 V
C1101
R101 40, 12W TP101
C1102
R102 68K TP102 150V, 10J
C1103
1A, 1000 V R103 100 TP103
C1104
R104 100
C1105
R105 10K, 2W X101 +15V VOLTAGE
C1106
5.1 V., 1 2 W R106 100 REGULATOR
/
R107 10K X102 -5V VOLTAGE
/ 1 2A SLOW BLOW, R108 47K REGULATOR
POWER SUPPLIES FUSE R109 4.7K
1 2A SLOW BLOW, R110 6.8K
/
FIELD FUSE R111 680
R112 47K
RED LIGHT R113 680
EMITTING R114 4.7K
DIODE R115 3.3K
R116 68K
1:1:1
PULSE
TRANSFORMER
G J
F H
631
540
PT
102B C104
B2L
C119
500
PT101A
A6H
SCR
102
SCR
101
541
C105 C106
C102
PT
C121
103B
PT101C
PT101B
SCR SCR BLU
103 104
WIRE FEED
D103
MOTOR FIELD
627
WH
BLK
LED
1C
C103 LED
D101 D102
1E
LED
RED
R102 1D
626
F102
532
539
FIELD SUPPLY
ARMATURE SUPPLY
D108
X101
525
OUT
IN
+15V
D110
D105
GND ANALOG
ANALOG
+ +
POWER SUPPLY
C116
C114 510
LED 1A
ZERO-VOLT
C117 +
DZ101 D111
C115
+ REFERNCE
GND
D107 LED 1B
500
OUT
IN
-10V
601
X102
METER
D109
SUPPLY
602
610
RELAY
D112 D113
POWER SUPPLY
LED 1F
C118
D114 D115
500
INTERFACE OPTION
POWER SUPPLY
R.F. BYPASS P.C. BOARD COMPONENTS NOT ON P.C. BOARD
CB1 5A. CIRCUIT BREAKER
CR1 SPST, N.O. FLUX OR WATER
CR2 SPST, N.O. TRAVEL
CR3 SPST, N.O. POWER SOURCE OUTPUT
.0047/3000 ARC VOLTAGE BY-PASS
CR6 SPST, N.O. SOLID STATE, OPTIONAL
(SEE SCHEMATIC "C")
LINC-FILL PILOT RELAY
.0047/3000 FLUX SOLENOID BY-PASS
CR7 OPTIONAL LINC-FILL BY-PASS CONTACTOR
.0047/3000 MOTOR FIELD BY-PASS
R1 2, 50W
S1 DPST, CONTROL POWER AND
EMERGENCY STOP
S2 SPDT, TRAVEL
T1A 36 VCT, 300mA SECONDARY
T1B 10 VAC, 600mA SECONDARY
T1C SEE LOGIC SCHEMATIC "D"
T2A 115VAC, 80mA SECONDARY
T2B 24VAC, 30mA SECONDARY
K
L M
525
A5H
+
C107
500
QU101
A6H
C108
C109
C110
WIRE FEED PT102A
PT103A
MOTOR
ARMATURE
587
FEED
FORWARD
Q102 C112
TO TACH
D6G
PICK-UP
P.C. BOARD
Q101
C122
Q103
C120
C111
500
A6H
FEED DIRECTION CIRCUIT
KEY TO SYMBOLS
INPUT CONTROL CABLE CONNECTION
POWER SUPPLY SOURCE POINT
COMMON CONNECTION TO ANALOG POWER
SUPPLY; 510
A5H
SCHEMATIC LOCATION REFERENCE
HORIZONTAL CO-ORDINATE LETTER
VERTICAL CO-ORDINATE NUMBER
SCHEMATIC IDENTIFICATION LETTER
UNLESS OTHERWISE SPECIFIED, COMPONENT VALUES OF:
CAPACITORS = MFD/VOLTS
RESISTORS = OHMS, 1 2 WATT /
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.
A.N.S.I. ELECTRICAL SYMBOLS PER E1537
G-5
NA-5