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