Lincoln Electric LN-9 SVM127-A Service Manual page 132

G-3
OPERATING SCHEMATIC
G
1702
A INPUT AND MOTOR POWER CIRCUIT
32 5 AMP CIRCUIT BREAKER
WIRE FEED S7
MOTOR DIRECTION
32A FIELD SWITCH
F101
32A
541
626
7 PT PT
TP
101 101
101 C102 C103
R
U
SCR101
C101 FWD
SCR102
D103
W
B
7 C111
627
TP
539
102
D101 D104
C110 D102
531
CR101
31
32A
5
531 115 VAC 115 VAC
4
HOT
T2
2A
1 COLD
24 VAC
502
HOT 620 S1
6
2 TRIGGER
621
3 SWITCH
504 CR101
620 621
2 4
TRIGGER
622
S2A BOARD 622
500
HOT-COLD 530
623
INTERLOCK SWITCH 623
BURNBACK RECEPTACLE 500 530
(SHOWN WITH JUMPER
B B
PLUG INSTALLED)
525 525
D TRIGGER AND TACH CIRCUIT
B B
+ C503
67 667 C520
500
B
TP
501
S3
4
POLARITY -
14
13
A
SWITCH
CW
12
X501
+
11
CAL
POS
NEG C521
D502
C501
C502
500
F501
B
510B X501
-
6 7
R536
B
5
+
C504
510B
21
525
VOLTAGE P.C. BOARD RECEPTACLE
FOR OPTIONAL PULSE POWER
FILTER P.C. BOARD PLUG
(SHOWN WITH JUMPER PLUG 1
INSTALLED). EARLIER VOLTAGE
P.C. BOARDS DO NOT HAVE THE
4 PIN RECEPTACLE AND 521A IS 521.
POWER CIRCUIT
C101
.005 MFD
F101 1/2 A. SLOW BLOW FUSE
C102 .047 MFD C201 .022 MFD
C103 .047 MFD C202 .022 MFD
C104 .022 MFD R101 40 OHM 12 W C203 18 MFD
*
C105 .01 MFD R102 100K OHM C204 4.7 MFD
C106 R103 C205
50 MFD 330 OHM .0033 MFD
C107 150 MFD R104 1K OHM C206 .47 MFD
C108 2.7 MFD R105 10K OHM C207 18 MFD
C109 .15 MFD R106 100K OHM C208 4 MFD
C110 .005 MFD R107 10 OHM C209 .047 MFD
C111 R108 C210
.005 MFD 2.2K OHM 4.7 MFD
C112 .02 MFD R109 15K OHM C211 .15 MFD
C113 .02 MFD C212 .022 MFD
C114 .022 MFD CR101 3PDT 24 VDC C213 .022 MFD
C115 .022 MFD C214 4.7 MFD
SCR101 12A, 400V C215 18 MFD
D101 16A SCR102 12A, 400V C216 100pf
}
D102 16A C217
D103 16A Q101 2N5655 THRU .022 MFD
D104 1A 1000V Q102 2N5655 C228
1A 1000V
D105 Q103 MPS A92
} }
D106 D201
THRU 1A THRU 1A.
*
D116 PT101 1:1:1 PULSE TRANS. D206
D208 1A.
DZ101 15V, 5W TP101 TRANSIENT PROTECTOR
DZ102 10V, 5W TP102 TRANSIENT PROTECTOR DZ201 6.8V.
R201 1K OHM
R202 270 OHM
* R203 500 OHM TRIMMER
C
C105 AND PT101 PRIMARY ARE SHOWN IN SECTION
B CONTROL POWER SUPPLY AND RELAY CIRCUIT
628
532
D110
D111
D106 D107 CR101
Q101
626B 525
526
526 +15V
C114
TP1 C109
REV. 28 VAC D114
R103
528
527 MOTOR
C106
627B
THERMOSTAT DZ101
+
524
C112 C113
601
C107
CR501
D105
10 VAC
510 530
602
CR101
T1
ZERO
VOLT
REFERENCE
D109
D108 530
DZ102 500
31
500 -10V
TACH
525
B
PICK-UP
P.C. BOARD
555
C507 12
+
PIN F
D
R510 13
- X502
WHITE C508
PIN S
R535 R507 - C518
2
A R511
3 1
+
X502
PIN A
667
525 BLUE
D506
E
B
PIN B
C506
+
515 C512
-
2 1
D
D516
D503 3
C519 +
D505
X501 S D
C505 +
Q502
DZ503
D501 G
B
D504 525
R508
B
B
521A D507
520
521 500
+
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
C401
500 MFD
R204 1.00K OHM 1/4W 1% R232 100 OHM C402 4.7 MFD
R205 2.94K OHM 1/4W 1% C403 27 MFD
R233 6.8K OHM
}
R206 15K OHM R234 2.7K OHM C404
R207 10K OHM R235 10K OHM C406 .022 MFD
R208 C407
100K OHM TRIMMER R236 15K OHM
R209 33K OHM R237 10K OHM
}
R210 10K OHM D401
R238 1M OHM
R211 5.6K OHM R239 15K OHM THRU 1A
R212 15K OHM R240 5.6K OHM D404
R213
47K OHM R241 15K OHM
R214 15K OHM R242 560 OHM X401 VOLTAGE REGULATOR
R215 100K OHM
R243 10 OHM
R216 1K OHM R244 270 OHM DM401 DIGITAL METER
R217 1K OHM
R218
1K OHM R401 24.3K OHM 1/4W 1%
R219 33K OHM X201 I.C. REGULATOR R402 2K OHM TRIMMER
R220 50K OHM TRIMMER R403
X202 I.C. TACHOMETER 2.80K OHM 1/4W 1%
R221 15K OHM X203 I.C. QUAD OP-AMP R406 7.68K OHM 1/4W 1%
R222 10K OHM TRIMMER X204 I.C. QUAD OP-AMP R407
1K OHM TRIMMER
R223 33K OHM R408 102K OHM 1/4W 1%
}
R224 100K OHM Q201 R409 10K OHM TRIMMER
R225 1K OHM
Q202 2N4123
R226 10K OHM Q203
FOR VOLTMETER P.C. BOARDS
R227 6.8K OHM Q204 2N4125
} L6687-1 OR HIGHER USE S21145
R228 10K OHM Q205
2N4123
R229 20K OHM TRIMMER Q206 SCHEMATIC FOR COMPONENT
R230 27K OHM VALUES AND CIRCUIT CONNECTIONS.
Q207 2N5816
R231 15 OHM
QU201
2N6027
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
ELECTRICAL DIAGRAMS
525
B
529
628
CR2 C115
520
Q207
Q103
11 12 10 +10.00 V.
C204
R243
2
525
B
6
3
D112
D115
9 8
X201
REF
4
D116
5
11
CW
X202
521
+
C202
TRIGGER D113 13
1
INTERLOCK C203
522 12 2 3
ON 7
C216
C201
TRIGGER
INTERLOCK
+
OFF
D509
521 +
+
D
Q102 C108
C214
D C104
510B
S2B
555 D
HOT COLD
INTERLOCK
SWITCH
R533 A
B
R534
525 B
1 5
OCI
501
2 6 4
14 C509
Q501
D517 DZ
501
START GAIN
C
CW
CW
525
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
FOR VOLTAGE P.C. BOARDS L6084-4 OR HIGHER USE L8388 SCHEMATIC FOR COMPONENT COMPONENTS
VALUES AND CIRCUIT CONNECTIONS.
R1 2 OHM 50W
C501 .1 MFD F501 1 8 AMP FAST / R517 1K OHM R2 10K OHM 2W POT.
C502 .005 MFD BLOW FUSE R518 270 OHM R3 10K OHM 2W POT.
C503 4.7 MFD R519 100K OHM R4 22K OHM
OCI501 OPTO-ISOLATOR
C504 R520 R5
4.0 MFD 15K OHM 0.1 OHM
C505 .47 MFD R521 56K OHM
Q501 2N4123
C506 .022 MFD R522 330K OHM CR2 WELD CURRENT-
Q502 2N4857
C507 .022 MFD R523 22K OHM REED SWITCH
Q503 MPSA42
C508 39 MFD R524 4.7K OHM CR4 G.L.P. REED SWITCH
C509 R525
.022 MFD 4.7K OHM
X501 I.C. QUAD OP-AMP
C510 1.8 MFD R526 22K OHM S1 SPST TRIGGER SWITCH
X502 I.C. QUAD OP-AMP
C511 .022 MFD R527 22K OHM DPDT
S2
C512 4.7 MFD R528 22K OHM CENT. OFF
TP501 TRANSIENT
C513 27 MFD R529 2.2K OHM S3 DPDT POLARITY SWITCH
PROTECTOR
27K OHM
C514 .022 MFD R530 S4 SPST G.L.P. RESET SWITCH
C515 1 MFD R531 100K OHM S5 DPDT SET-ACTUAL SWITCH
R501 44.2K OHM 1/4W 1%
C516 .022 MFD R532 27K OHM S6 3 POLE VOLTS-SPEED SELECTOR SWITCH
R502
500 OHM TRIMMER
10K OHM
C517 .47 MFD R533 S7 DPDT DIRECTION SWITCH
R503 4.75K OHM 1/4W 1%
C518 39 MFD R534 100 OHM
R504 100K OHM
}
1K OHM
C519 R535 T1 POWER SUPPLY TRANSFORMER
R505 27K OHM
THRU .022 MFD R536 270 OHM T2 TRIGGER SUPPLY TRANSFORMER
R506 15K OHM
C522 R537 33K OHM
R507
10K OHM
R538 56K OHM TP1 150VAC TRANSIENT PROTECTOR
R508 2.2K OHM
CR501 S.P.D.T. 24VDC
R539 27K OHM
R509 2.7MEG OHM
} 5K OHM TRIMMER
R540
D501 R510 4.7K OHM
R541 2K OHM TRIMMER
THRU 1 AMP R511 100K OHM
R542 5.6K OHM
D518 R512
1K OHM
THIS SHEET CONTAINS PROPRIETARY INFORMATION
R513 2.7MEG OHM THE LINCOLN ELECTRIC CO.
OWNED BY
D509 AND CR501 N.C.
DZ501 20V, 1W R514 5.6K OHM
NOT TO BE REPRODUCED, DISCLOSED OR USED
DZ502 15V, 1W R515 1.8K OHM CONTACTS ARE SHOWN WITHOUT THE EXPRESS PERMISSION OF
DZ503 5.1V R516 100K OHM
IN SECTION B THE LINCOLN ELECTRIC CO.
C MOTOR CONTROL CIRCUIT
525 525
B B
C221
C209
C217 C219
R221
4
C208
-
X203
2 512
10
A 4
R244 R217 - - X204
3 1 6 2
+ D A
11 C218
5
631 C212 5 7 3 1
+ +
CW WIRE SPEED 500
X203 CW 11
B
CONTROL
4
H1
X203
CW 632
- 511 C210 +
13
CAL 633
B R202 R218 C220
12
14 500
+
B
+ C213
C215
512
R212 R214
C C223
- -
D204
9 8 9 8
C B
510A 10 10
+ +
PIN
X203 PIN X204
525 F S
B
D205
511 CW
C
ACC D208
525
Q201
D202
B
+
C207
C226 DZ201
Q202
D201
D203 C222
524 B
525
C C
511 512
B
SET
S5
CR S6
D514
501 C3
513
C1
R525
+
9 10 1
12 2
X502 561 11
3
+ C515 517
10
560
R524 C
8
9
-
C407 C406 C404
D513
D518 CR501
CW
CW
DZ502 533
Q503
CR4
C514
534
D515
530 S4
G.L.P. RESET
B
500
B
510A 510B
LN-9 ABOVE CODE
GND
9131 AND LN-9F
USED ON LN-9
BELOW CODE 9131
G
KEY TO SYMBOLS
CIRCUIT
A INPUT CABLE CONNECTION
C
E
POWER OR SIGNAL SOURCE POINT
F
F
REMOVABLE CONNECTION
COMMON CONNECTION
B
F
A THRU G SOURCE POINT CIRCUIT LOCATION
D
HOT-COLD
B & D
INTERLOCK SWITCH
E
F
G
SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT
G
BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGEABILITY
A
OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT SHOW THE EXACT
B
COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON
D
CODE NUMBER.
A
UNLESS OTHERWISE SPECIFIED TOLERANCE
THE LINCOLN ELECTRIC CO.
ON HOLE SIZES PER E2056
AND IS 3-25-94A
ON 2 PLACE DECIMALS IS .02 CLEVELAND, OHIO U.S.A.
8-2-96B
ON 3 PLACE DECIMALS IS .002
ON ALL ANGLES IS .5 OF A DEGREE SCALE NONE
MATERIAL TOLERANCE (" ") TO AGREE t
FI 11-1-96
WITH PUBLISHED STANDARDS. DR DATE CHK
G-3
B 628
CW LO
D206
C224
Q204
Q203
C228
R231
QU201
C225
C211
Q205
540
Q206
C105
PT
101
C227
500
B
E E
514 515
ACTUAL
C2
516
8 510
IN./MIN.
5 6
HI
4 7
VOLTS
M/MIN
LO
517
518 518
562
CW A TP5
3
+5V
1
4 OUT
IN
2
TP4 D402
DM401 X401
B
GND
+ D401
+ C403 E C
+ 601
602
C402
C401
B
D403 D404
510C 510
METER CIRCUIT
ELECTRICAL SYMBOLS PER E1537
LEAD COLOR CODING
B - BLACK
R - RED
U - BLUE
W - WHITE
EQUIP.
LN-9 AND LN-9F (METRIC)
TYPE
OPERATING SCHEMATIC
SUBJECT
G
SHT.
1702
REF. G1590 6-14-85
SUP'S'D'G NO.
LN-9