Operating Schematic - Lincoln Electric SVM138-A Service Manual

G-10

Operating Schematic

G
1763
A INPUT AND MOTOR POWER CIRCUIT
32 3A CIRCUIT BREAKER
32A S7
DIRCTION
32A
SWITCH
F101
CR101
541B
32A
C102 C103
REV.
7A 7
GAS
CR101
SOLENOID
PT D103
PT
101
101
SCR101 SCR102
TP
C101
101
C105
C104 D101 D102
539B
CR101
531
31
115 VAC
32A
T2
7A
4
9 7
S2A
3 31
HOT-COLD
11 524A
INTERLOCK SWITCH
524 B
7 HOT
620
2 2A COLD
B 530
HOT
530
CR101
2
500
6 504
B 500
4
5
10 628 B
12 500 B D
GMA TIMER AND BURNBACK TIMER 525
RECEPTACLE (SHOWN WITH JUMPER B
PLUG INSTALLED)
+
C503
67 667 C520
500
B
TP 510B
501
S3
4
POLARITY -
14
13
SWITCH A
CW 12
721 X501
+
11
CAL
POS
NEG C521
D502
C501
C502
500
F501
B 510B
X501
510B
-
7
6
B
5
+
C504
510B
21
D509
VOLTAGE P.C. BOARD RECEPTACLE
FOR OPTIONAL PULSED POWER
FILTER P.C. BOARD PLUG
(SHOWN WITH JUMPER PLUG
INSTALLED)
POWER CIRCUIT
FOR POWER BOARDS
L7265-3 OR HIGHER USE
C101 .005/1400 D117 1A C201
C102 .047/100 D119 1A SCHEMATIC L8871. C202
C103 .047/100 D120 .15A C203
C104 C204
.005/1400
C105 .005/1400 F101 4/10 SLOW BLOW FUSE C205
C106 .15/200 R101 330 OHM C206
C107 150/50 R102 10 OHM C207
C108 .022/25 R103 2.2K OHM C208
C109 .022/25 R104 15K OHM C209
C110 .022/25 R105 1K OHM C210
C111 2.7/50 R106 10K OHM C211
*
C112 .01/100 R107 100K OHM C212
C113 .022/25 R108 22K OHM C213
C114 R109
.022/25 47K OHM C214
C115 .022/25 R110 22K OHM C215
C116 .022/25 R111 15K OHM C216
C117 .15/200 R112 15K OHM C217
D101 16A R113 100 OHM THRU
D102 16A CR101 3PDT 24 VDC C228
D103 16A SCR101 12A, 400V C229
D104 SCR102 12A, 400V D201
THRU 1A Q101 2N5655 THRU
D108 Q102 2N5655 D206
Q103 D208
D109 .15A MPS A92
D110 1A Q104 2N4125 R201
D111 1A Q105 BS170 R202
*
D112 .15A PT101 R203
1:1:1 PULSE TRANS.
D113 1A TP101 TRANSIENT PROTECTOR R204
D114 1A X101 I.C. DUAL "D" FLIP FLOP R205
DZ101 15V, 5W R206
D116 .15A
* DZ102 10V, 5W R207
C112 AND PT101 PRIMARY ARE SHOWN IN SECTION C
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
available 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.
B
CONTROL POWER SUPPLY AND RELAY CIRCUIT
628
532
D108 C113
541 D104 D105
Q101
(B)
D116
530
FWD
R111
525
C116
+15V
P.M.
526 526 Q104
D117
ARM
C106 14
C108 500
Q105
26 VAC
D109 3 C Q 1 R113
R101
5 2
D Q
527 522
527 X101
539 DZ101
6 S R 4
C115
(W)
+
ON
7 8 9 10 11
C107
601
510
D119
OFF
530B
9.6 VAC
TRIGGER
ZERO INTERLOCK
602
VOLT
T1
C114
REFERENCE D120
D106 D107
DZ102
S2b
HOT COLD
31
INTERLOCK
500 -10V
531
SWITCH
24 VAC
620 TO CONTROL
621 RHEOSTAT PLUG
621
TRIGGER
BOARD
622
TRIGGER
622
SWITCH
623
623
TRIGGER CIRCUIT
12
C507
PIN F
R510 13
WHITE C508
PIN S
R535 R507 - C518
2
A R511
3 1
+
X502
PIN A
667
525 BLUE
D506
E
B
C506 PIN B
+
515 C512
-
2 1
R536
D516 D
D503 3
C519 +
D505 S
X501 D
+
C505
Q502
C DZ503
D501 G
B
522
D504 525
R508
B
521A D507
525 521 500
520
B
+
1 4 3 2
634
X501
- C517
9
CW C R518
D508
"VOLTS" 10 8
+
514
CONTROL
635
+
636
500 521A
C510
C516 B E
510B
E VOLTAGE CONTROL CIRCUIT
CONTROL CIRCUIT METER CIRCUIT
FOR P.M. CONTROL BOARDS
.022/25 R208 100K OHM TRIMMER C401 500 MFD
.022/25 R209 33K OHM L10068-1 OR HIGHER USE C402 4.7 MFD
18/15 R210 10K OHM SCHEMATIC L10069. C403 27 MFD
R211 C404
4.7/35 5.6K OHM
.0033/200 R212 15K OHM THRU .022 MFD
.33/50 R213 47K OHM C407
18/15 R214 15K OHM D401
4/50 R215 100K OHM THRU 1A
.04/100 R216 1K OHM R239 15K OHM D404
2.7/50 R217 1K OHM X401
R240 5.6K OHM VOLTAGE REGULATOR
.15/200 R218 1K OHM R241 15K OHM DM401 DIGITAL METER
.022/25 R219 33K OHM R242 560 OHM R401 24.3K OHM 1/4W 1%
.022/25 R220 50K OHM TRIMMER R243 R402
10 OHM 2K OHM TRIMMER
R221 R403
4.7/35 15K OHM R244 270 OHM 2.80K OHM 1/4W 1%
18/15 R222 10K OHM TRIMMER R245 10K OHM R404 13.7K OHM 1/4W 1%
100pf/100 R223 33K OHM R246 68.1K OHM R405
2K OHM TRIMMER
R224 100K OHM R406
X201 I.C. REGULATOR 3.74K OHM 1/4W 1%
.022/25 R225 1K OHM X202 I.C. F/V CONVERTER R407 500 OHM TRIMMER
R226 13.7K OHM X203 I.C. QUAD OP-AMP R408 61.9K OHM 1/4W 1%
.47/50 R227 6.8K OHM R409
X204 I.C. QUAD OP-AMP 5K OHM TRIMMER
R228 10K OHM Q201
1A. R229 10K OHM TRIMMER Q202 2N4123
R230 22K OHM Q203
R231
1A. 15 OHM Q204 2N4125
FOR VOLTMETER P.C. BOARDS
1K OHM R232 100 OHM Q205 BS170
270 OHM R233 6.8K OHM Q206 2N4123 L6688-1 OR HIGHER USE S21146
500 OHM TRIMMER R234 2.7K OHM SCHEMATIC FOR COMPONENT
Q207 2N5816
1.00K OHM 1/4W 1% R235 10K OHM QU201 2N6027 VALUES AND CIRCUIT CONNECTIONS.
2.94K OHM 1/4W 1% R236 15K OHM DZ201 6.8V.
15K OHM R237 10K OHM
DZ202 16.0V.
10K OHM R238 1M OHM DZ203 3.0V.
ELECTRICAL DIAGRAMS
525
B
529
628
CR2 C109
520
Q103 Q207
D110
11 10 +10.00 V.
12
CR101
C204 R203
2 525
B
6
3
D111
D112
C117
9 8
X201
4 REF
5
D113 CW 11
X202
A +
C202
D114 13
524A 1
C203
12 2 3
7
524
C216
C201
CR501
+
530A
521 +
D +
530 C111
Q102
525
500 C214
D C110
B
(R)
RING
MAGNET
(Y)
X1
555
(B)
HALL EFFECT
R533 A
MODULE
B
525 R534 B
1 5
OCI
501
2 6 4
+
C509
14
D
- X502
Q501
D517 DZ
501
GAIN
START
C
CW
CW
525
B
C511
D510
5
4
+
7
B
R530
X502
-
11
6
D511
D512
C522
500 C513
SHUTDOWN
B
BYPASS TABS
F SHUTDOWN CIRCUIT
VOLTAGE CIRCUIT COMPONENTS NOT ON P.C. BOARD
C501 .1/100 Q501 2N4123 R525 4.7K OHM COMPONENTS
C502 .005/1400 Q502 2N4857 R526 22K OHM R1 2 OHM 50W
C503 4.7/35 Q503 MPSA42 R527 22K OHM R2 10K OHM 2W POT.
C504 X501 R528 22K OHM R3
4.0/50 I.C. QUAD OP-AMP 10K OHM 2W POT.
C505 .47/50 X502 I.C. QUAD OP-AMP R529 2.2K OHM R4 22K OHM
C506 .022/25 TP501 TRANSIENT R530 27K OHM CR2 WELD CURRENT-
C507 .022/25 PROTECTOR R531 100K OHM REED SWITCH
C508 39/20 R501 44.2K OHM 1/4W 1% R532 27K OHM CR4 G.L.P. REED SWITCH
C509 .022/25 R502 500 OHM TRIMMER R533 10K OHM S1 SPST TRIGGER SWITCH
C510 1.8/20 R503 4.75K OHM 1/4W 1% R534 100 OHM DPDT
S2
1K OHM CENT. OFF
C511 .022/25 R504 100K OHM R535
C512 4.7/35 R505 27K OHM R536 270 OHM S3 DPDT POLARITY SWITCH
C513 27/35 R506 15K OHM R537 33K OHM S4 SPST G.L.P. RESET SWITCH
R507 R538 56K OHM S5
C514 .022/50 10K OHM DPDT SET-ACTUAL SWITCH
C515 1/35 R508 2.2K OHM R539 27K OHM S6 3 POLE VOLTS-SPEED SELECTOR SWITCH
C516 .022/25 R509 2.7MEG OHM R540 5K OHM TRIMMER S7 DPDT DIRECTION SWITCH
C517 .47/50 R510 4.7K OHM R541 2K OHM TRIMMER T1 POWER SUPPLY TRANSFORMER
5.6K OHM
C518 39/20 R511 100K OHM R542 T2 TRIGGER SUPPLY TRANSFORMER
C519 R512 1K OHM X1 HALL EFFECT MODULE
THRU .022/25 R513 2.7MEG OHM D509 NOT USED FOR
C522 R514 5.6K OHM GMA MODELS
CR501 S.P.D.T. 24VDC R515 1.8K OHM
D501 R516 100K OHM CR501 N.C. CONTACT ARE
THRU R517
1 AMP 1K OHM B
SHOWN IN SECTION
D518 R518 270 OHM
DZ501 20V, 1W R519 100K OHM
DZ502 15V, 1W R520 15K OHM
DZ503 5.1V R521 56K OHM
FOR VOLTAGE P.C. BOARDS
THIS SHEET CONTAINS PROPRIETARY INFORMATION
F501 1 8 AMP FAST / R522 330K OHM
THE LINCOLN ELECTRIC CO.
L6084-4 OR HIGHER USE L8388 OWNED BY
BLOW FUSE R523 22K OHM
SCHEMATIC FOR COMPONENT NOT TO BE REPRODUCED, DISCLOSED OR USED
OCI501 OPTO-ISOLATOR R524 4.7K OHM
WITHOUT THE EXPRESS PERMISSION OF
VALUES AND CIRCUIT
CONNECTIONS. THE LINCOLN ELECTRIC CO.
C MOTOR CONTROL CIRCUIT
525 525
B B
C221
J C209
C217 C219
R221
4
C208
-
X203
2 512
10 4
A R244 R217
- - X204
6 2
3 1
+ C218 D A
11
5 631 C212 5 7 3 1
+ +
CW WIRE SPEED 500
- X203 CW
CONTROL B K
4
X203 H1
632
- 511 C210 +
13
633
B R202 R218 C220
12 500
14
+
CW
B
CAL + C213
C215
512
R212 R214
C C223
- -
D204
9 8 9 8
C B
510A 10 10
+ +
PIN PIN
X203 X204
525 F S
B
D205
511 CW
C
ACC D208
Q201
D202
+
C207
DZ201
C226
Q202
D201 +
D203 C229 C222
500
524A
A
525 C
511 512 C
B
SET
S5
CR S6
D514
501 C3
513
C1
516
R525 12
+
9 10 1
2
4
X502 561 11
3
+ C515 519
10 517
560
R524 C
B 9
-
C407 C406 C405 C404
D513
CR501
D518
CW
CW CW CW
DZ502 533
Q503
CR4
C514 TP4
D515 534
S4
+ C403
530A
G.L.P. RESET
B
500
B
510A 510B
GND
G
KEY TO SYMBOLS
CIRCUIT
A INPUT CABLE CONNECTION
C
E
POWER OR SIGNAL SOURCE POINT
F
B
REMOVABLE CONNECTION
F
COMMON CONNECTION
D
HOT-COLD
B & D
INTERLOCK SWITCH
A THRU G SOURCE POINT CIRCUIT LOCATION
E
F
G
J THRU M TEST POINTS
G
A
B
SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT
D
BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGEABILITY
B
OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT SHOW THE EXACT
COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON
CODE NUMBER.
UNLESS OTHERWISE SPECIFIED TOLERANCE 6-7-96A
THE LINCOLN ELECTRIC CO.
ON HOLE SIZES PER E2056
AND IS 12-21-89C 8-2-96B
ON 2 PLACE DECIMALS IS .02 CLEVELAND, OHIO U.S.A.
11-9-90D
ON 3 PLACE DECIMALS IS .002
ON ALL ANGLES IS .5 OF A DEGREE 11-1-91A
SCALE NONE
MATERIAL TOLERANCE (" ") TO AGREE t 1-21-94H
DR DAD DATE 6-25-92 CHK
WITH PUBLISHED STANDARDS. 3-25-94A
G-10
B 628
CW
LO
D206
C224
Q204
Q203
C228
R231
M
QU201 DZ203
C225
C211
L Q205
540
C112 Q206
PT
101
C227
B
E E
514 515
ACTUAL
C2
8 510
IN./MIN.
5 6
HI 7
VOLTS
M/MIN LO
518 518
562
A TP5
3
+5V
1
OUT
4
IN
2 D402
DM401 X401
B
GND
+
E C D401
+ 601
602
C402
C401
B
D403 D404
510C 510
METER CIRCUIT
NOTES
ELECTRICAL SYMBOLS PER E1537
CAPACITORS = MFD/VOLTS
*
RESISTORS = OHMS/WATTS
*
1 2 WATT UNLESS OTHERWISE /
SPECIFIED.
OP - AMP = LM 224
REGULATOR = LM 723
F/V CONVERTER = LM 2907
DUAL "D" FLIP FLOP = MC14013B
LEAD COLOR CODING
B - BLACK
R - RED
U - BLUE
W - WHITE
EQUIP.
L N - 9 G M A A N D L N - 9 F G M A
TYPE
O P E R A T I N G S C H E M A T I C
SUBJECT
G
SHT.
1763
REF. SUPÕSÕDÕG 6-26-86 NO.
LN-9 GMA