Voltage Pc Board Schematic - Lincoln Electric NA-5N Service Manual

G-7

VOLTAGE PC BOARD SCHEMATIC

A
L501
N.A.
1 667
TP
C1102
501
ARC
VOLTAGE
POLARITY
TERMINALS
C1101
-
F501
2
621
L502
3
4 FROM
OPTION
AND
VOLTAGE
635
PROCEDURE
SETTING
P.C. BOARD
E2E
5
6
7
C501
.1/100
C504 4.0/50
C505 .47/50
C506 .022/25
C507 .022/25
C508 39/20
C509 .022/25
C510
1.8/20
C511 .022/25
C512 4.7/35
C513 27/35
C514 4.7/35
C516 .022/25
C517 .47/50
C518 39/20
C519 .0047-.005/1400
C520
.022/25
C521 .022/25
C522 .022/25
C523 .022/25
C524 4.7/35
C525 .022/25
C526 .47/50
C527
.01/200
C528 .022/25
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
E
B C D
525
A5H
C524 WELD
C520 +
RESPONSE
JUMPER
500
(RED)
A6H
4
-
13
CW 14
A
R535
12
C519
+ ACTUAL VOLTAGE
11
BUFFER
C506
C501
C521
D502
525
D516
-
A5H
500 6 7
D
A6H
5
510P +
X501
DZ
B3C
503
9
X501
-
D503
+
8
B D504
R547
+
10 C505
D501
C523
C504
510P
B3C
ACTUAL VOLTAGE
HOLD - LOW CIRCUIT
METER FILTER
516
2
X501
-
1 514
C R546
+
3
+
C510 C516 SET ACTUAL
N.C.
688
510P S7B S7B
D4J
VOLTS
B3C
ARC CONTROL
517
SET-ACTUAL
ENABLE
SET VOLTAGE
BUFFER
CW
CAL TP5
C604
1 +5V
X601
2
TP4
DM601 OUT
IN
4
GND
D601
C603 E C A
+
518 +
C602
C601
510P
510
VOLTMETER VOLTMETER
B3C
B7G
POWER SUPPLY
VOLTAGE P.C. BOARD
R501 R526
D501 44.2K, 1/4W, 1% 47K F501
THRU 1A, 400V R502 500 TRIMMER R527 47K
D522 R503 4.75K, 1/4W, 1% R528
22K SBS501
DZ502 6.8V, 1 2W / R504 100K R529 22K
DZ503 5.1V, 1/2W R505 27K R530 27K T501
DZ504 20V, 1W R506 15K R531 100K
DZ505 6.2V, 1/2W R507 10K R532 27K TP501
15V, 1W R508 2.2K
DZ506 R533 10K
DZ507 6.8V, 1/2W R509 2.7K R534 100
L501 R510 4.7K R535
33uH, 110mA 1K
L502 33uH, 110mA R511 100K R536 10K
OCI501 R512 1K R537 33K
OPTO-ISOLATOR
OCI502 R513 2.7K R538 56K
Q501 2N4123 R514 2K TRIMMER R539 27K
R515
Q503 2N5816 5.6K R540 5K TRIMMER
Q505 2N4123 R516 100K R541 1K, 12W
2N4857 R517 1K R542
Q506 470
Q507 2N5816 R518 100K R543 68K
Q508 2N5816 R519 39K R544 15K
X501 QUAD OP-AMP R520 15K R545 15K
X502 QUAD OP-AMP R521 56K R546 270
R522 330K R547 270
R523 22K R548 100
R524 27K
R549 270
R525 3.3K
F
G H J
R533
C507
525 R534
PIN F
R510 R509 A5H
+ 5
1 OCI501
C508
PIN S
C518
C509
2 6
10 2 4
R507 -
+ +
A 8
B DZ
1
504
+
-
3 X502 D506 Q501
9 X502
D517
CONTROL POWER SOURCE
CW
AMP CONTROL INTERFACE
GAIN
START
CW
D505 Q506
525
A5H
D512
R511 R519
C517 +
C512
+ D514 +
500 PIN PIN PIN
D508
A B D
A6H
688A
START
RESPONSE D510
D507
JUMPER
525 (WHITE)
A5H
R525
D511
4 2 3 1
688
D4J
VOLTAGE P.C. BOARD RECEPTACLE FOR
OPTIONAL PULSED POWER FILTER P. C.
SHUTDOWN
BOARD (SHOWN WITH JUMPER PLUG ENABLE
INSTALLED.)
D602
A6E
601
602
A6E
D603 D604
VOLTMETER P.C. BOARD COMPONENTS NOT ON P.C. BOARD
1 8 AMP FAST / C601 500/50 DM601 DIGITAL METER
BLOW FUSE C602 4.7/35
.022/25
SILICON BILATERAL C603 S7B SPDT, VOLTS SET-ACTUAL
.022/25
SWITCH C604
D601
24 VAC, 185 mf
SECONDARY D602
1A, 400V
150V, 10J D603
NOTES:
D604
N.A. THESE CAPACITORS ARE LOCATED
ON THE R.F. BYPASS BOARD.
R601 24.3K, 1/4W, 1%
(SEE SCHEMATIC A).
R602
2K TRIMMER
R603 2.80K, 1/4W, 1%
N.B. SEE L6682-3A SCHEMATIC FOR
SUPERSEDED G1556-1 VOLAGE
X601 +5V VOLTAGE REGULATOR
BOARD.
N.C. EARLIER VOLTAGE BOARDS DO
FOR VOLTMETER P.C. BOARDS
NOT HAVE THIS RECEPTACLE, AND
L6685-1 OR HIGHER USE S21143
SCHEMATIC FOR COMPONENT LEAD 688A WAS 688.
VALUES AND CIRCUIT CONNECTIONS.
K L M
525
A5H
A
B
D519
D520
R527
12
531B D515
T501 +
14 DZ
A5D
D
115 24 13 507
DZ
-
VAC
VAC 506
532 X502
+
637
A5D
Q508
C
C526 D5A
D521 D522
510P
B3C
510
Q507
C525
6
1 4
C527
5
D513
0CI502 AUTO-STOP
2
500
510P CIRCUIT
D9C
D514
592 B3C
D7A COM
AUTO-STOP AND
SHUTDOWN BYPASS
AUTO
TAB JUMPER (BLUE)
BYPASS
525
A5H
SHUTDOWN
C511
687
D4B
SBS
501
D518
4
5
+
7
DZ502
Q503
C
R530
- X502
6
11
C522
C528
D509 +
500 C513
A6H
500
A6H
SHUTDOW CIRCUIT
KEY TO SYMBOLS
INPUT CONTROL CABLE CONNECTION
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-7
NA-5