G-6
ELECTRICAL DIAGRAMS
INVERTEC STT & STT II
J28
11
50V
0.1
C413
+15V_REM
50V
0.1
C411
+15V_REM
REM
REM
3
.9
2
K
R
4
6
3
METER_2
METER_1
PB_SCALED
1.
00
K
R
4
3
6
3
.9
2
K
R
4
6
1
J28
10
J28
6
J28
3
15.0K
R437
10.0K
R431
OCI4
Vcc
GND
HP2231
5
8
1.
00
K
R
4
3
2
0.01
W4
FILE: G2781_1D1
+PWR
+VIN
-PWR
+VIN
+PWR
B
A
C
K
G
R
O
U
N
D
M
E
T
E
R
-VIN
POWER
TO
BOARD
4
2
3
J1
1
Input- Current
Feedback
Vac In
COMMON CONNECTION
FRAME CONNECTION
LAST NO. USED
129, 211, 314, 475
165, 242, 345, 564
117, 211, 310, 424
VOLTAGE NET
1
9
16
8
to Control Panel
Analog Logic I/O
J2
to Control Panel
Analog Logic I/O
1
6
3
4
J3
C-
D-
R-
SUPPLY
LABELS
1/4W
(UNLESS OTHERWISE SPECIFIED)
UNLESS OTHERWISE SPECIFIED)
200 SERIES- TRIGGER CIRCUIT
100 SERIES- ARC SENSE CIRCUIT
REFERENCE DESIGNATOR SERIES DEFINITIONS
GENERAL INFORMATION
1A, 400V
RESISTORS = Ohms (
MFD
CAPACITORS =
ELECTRICAL SYMBOLS PER E1537
DIODES =
( .022/50V
(SHEET 2)
UNLESS OTHERWISE SPECIFIED)
(SHEET 2)
+15V
COMM
PHA OUTPUT
PHB OUTPUT
0.
01
W
1
ON HOLES SIZES PER E-2056
ON 2 PLACE DECIMALS IS + .O2
UNLESS OTHERWISE SPECIFIED TOLERANCE
3SEC
ARC_START
WITH PUBLISHED STANDARDS
ON 3 PLACE DECIMALS IS + .OO2
ON ALL ANGLES IS + .5 OF A DEGREE
MATERIAL TOLERANCE ("t") TO AGREE
J3
6
Ch'ge.Sht.No.
+5.1V
P
L
A
S
M
A
B
O
O
S
T
M
E
T
E
R
-PWR
-VIN
A
J28
13
J28
5
39
20V
C469
5
6
2
R
4
7
9
Q6
2N4401
J27
4
J28
12
33.2K
R485
X18
3
2
1
J27
8
J28
9
J28
4
J28
2
J3
5
X22
3
5
4
Remote
Control
10
6
5
1
J27
J28
14
1
7
8
Darlington
Drive- Output
W4
STT CONTROL
Q10
POWER SUPPLY SOURCE POINT
SCHEMATIC (Sheet 1 of 2)
DZ20
EARTH GROUND CONNECTION
OCI7
SHT.
NO.
G
X36
SUP'S'D'G.
04/12/94
SCALE
DATE
NONE
CLEVELAND, OHIO U.S.A.
DR.
MLD
300 SERIES- DIGITAL LOGIC CIRCUIT
400 SERIES- ANALOG LOGIC CIRCUIT
THE LINCOLN ELECTRIC CO.
SUBJECT
CHK.
EQUIP.
(SHEET 1)
TYPE
(SHEET 1)
A
NAND
B
H
O
T
S
T
A
R
T
T
IM
E
CW
10K
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
NUMBER.
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
NOTES :
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
PINCH SLOW RAMP
COMMAND SIGNAL
BALL
PINCH KNEE
KEEP_ALIVE LEVEL
PINCH FAST RAMP
BACKGND
P_BOOST
PINCH RAIL
RAMP
FUSE
KEEP_ALIVE LEVEL
TAILOUT
BACKGND
OFF
J27
3
C453
100K
R496
X30
3
5
4
10.0K
R536
100
R481
MILD
-
> .045 DIA WIRE
< .035 DIA WIRE
-
CURRENT FEEDBACK
1V/100A
WIRE TYPE SELECT
WIRE SIZE SELECT
SENSE
BOARD
1014
B
5V
3V
B
NAND
+15V POWER SUPPLY FOR
DIGITAL, TRIGGER & ANALOG SECTIONS
10K
CW
R
E
M
O
T
E
P
B
P
O
T
STAINLESS
18 VAC
lm350
A
1014
INTEGRATOR
CURRENT
CURRENT
COUNTER
DUAL FF
PWM
G
POWER PLANE
COUNTER
GROUND PLANE
3
3
.2
K
R
5
1
8
X35
1
2
3
1.0
35V
C423
X36
4
5
6
332K
R522
X35
7
6
5
68
.1
K
R
5
1
4
2
2
1
K
R
5
2
1
10.0K
R510
68.1K
R513
J27
1
200V
.33
C464
47.5K
R519
1W
10V
DZ9
J1
1
J1
2
1.0
35V
C412
+
t
56
R526
J3
1
J1
4
J1
3
10.0
R466
+
t
.25
R467
1
2
J3
4
X25
SG3846
12
13
1W
10V
DZ20
1N914
D412
2.5V
L
O
C
A
L
P
B
P
O
T
10K
CW
POWER
POTS
CONTROL
10 VDC
REMOTE_POTS
+15V
+15V
C461
2.67K
R544
75.0
R504
100
R489
10
.0
R
5
0
0
1
0
0
R
5
0
7
J27
2
J27
9
J27
10
J3
3
X33
TL431
REF
8
1
6
SS_WIRE
1.0
35V
C404
2.67K
R545
5
.6
2
K
R
4
7
2
1.
30
K
R
5
0
5
1.0
35V
C402
2.67K
R406
1W
12V
DZ11
1.0
35V
C446
1.0
35V
C460
1.
00
M
R
4
6
9
1.0
35V
C400
C401
1.
50
K
R
5
0
3
D407
J2
15
100
R404
+15V
1W
12V
DZ10
1.
30
K
R
4
0
0
1.
30
K
R
4
0
1
J3
2
J2
16
J2
10
75
.0
R
4
0
2
1.
30
K
R
5
0
6
D400
C403
10
.0
R
5
0
1
1.
00
M
R
5
3
3
1W
12V
DZ18
10.0K
R403
4
.7
5
K
R
5
0
2
2.67K
R546
/PB_LOCAL
NAND
+15V
Q9
2N4401
/ARC
X14
11
12
13
X14
10
8
9
10K
R320
OCI1
HP2231
1
2
LT1014
X24
4
11
4066B
X30
14
7
LM2901
X23
3
12
50V
0.1
C459
1N4936
D303
50V
0.1
C427
100V
330p
C306
+15V
/PINCH
/PWM_SYNC
/PWM_SYNC
NAND
14
7
/Q2
D1
VDD
Q1
SET 2
CLOCK 2
/Q1
Q2
CLOCK 1
VSS
RESET 1
MC14013B
SET 1
D2
RESET 2
X19
11
10
13
8
12
2
1
6
4
9
5
3
50V
0.1
C428
3.92K
R457
X17
4
5
6
X14
3
2
1
B
2.
21
K
R
3
1
7
100V
330p
C305
OCI3
HP2231
6
3.
01
K
R
4
5
6
3.
01
K
R
4
5
4
5
6
.2
K
R
3
2
1
4.75K
R319
OCI3
HP2231
7
4.75K
R318
X16
4
5
6
+15V
ARC_START
/PWM_SYNC
START_RESET
NAND
D
PINCH SIGNAL
TO FE (SHEET 2)
FOR ENERGY
CONTROL OPTION
"DIGITAL LOGIC"
GROUND PLANE
C
A
BALL_OR_FUSE
NAND
OP AMP
B
A
NAND
B
NAND
POWER PLANE
COMPARATOR
SWITCH
ENABLE (SHEET 2)
ENERGY CONTROL OPTION
PINCH LATCH
P_BOOST ONLY AFTER
P_BOOST TIME (SHEET 2)
ENERGY CONTROL OPTION
H = A>100
V=ARC
KEEP IN P_BOOST
UNTIL ARC STARTS
C
X16
10
8
9
150K
R422
SLOW RAMP
Q8
2N4401
2
.6
7
K
R
4
5
2
3.32K
R426
13
12
Vc
GND
SYNC
X25
V+
Vref
CLIM
OUTB
COMP
I-
I+
V-
OUTA
SHUT
CT
RT
Vin
SG3846
9
3
8
4
10
5
6
2
15
11
14
16
1
7
B
P_BOOST COMMAND
C473
L= .035
H= .045
( SHEET 2 )
Verror
X22
8
6
9
10
.0
K
R
5
5
1
100
R405
1us MIN PULSEWIDTH
15.0K
R453
3us MAX DEADTIME
10K
CW
R425
1N4936
D401
500
CW
R
4
2
9
2
6
7
K
R
4
2
3
1.00K
R427
47.5K
R419
100K
R424
100A/ms
A
RAMP
PINCH
1014
X21
10
12
11
1.00K
R428
X24
1
2
3
100V
47p
C410
475K
R421
47.5K
R420
100K
R416
X21
8
6
9
X31
10
12
11
1
0
0
K
R
5
5
2
X21
1
13
2
39
20V
C465
15.0K
R410
B
1000A/ms
FAST RAMP
50V
.018
C418
10
.0
K
R
5
6
4
CURRENT
ERROR AMP
22
.1
K
R
5
5
5
GENERATOR
WAVEFORM
SAWTOOTH
1.8
20V
C419
D
Q4
2N4401
B
COMMAND
6.81K
R411
A
100V
100p
C472
Q10
2N4401
47.5K
R409
COMMAND
LOCAL_POTS
2
6
.7
K
R
4
5
1
+15V
+5.1V
LOCAL
+15V
NAND
MC14538B
TIMER
TIMER
OP AMP
GROUND PLANE
A
LM224
375us
+5 VOLT
POWER
METER
2.5V
B
LM224
POWER PLANE
2.67K
R508
8
2
5
R
4
8
6
10.0K
R527
X34
7
6
5
X26
TL431
REF
8
1
6
1.0
35V
C448
1.
00
M
R
51
1
D413
C314
X34
1
2
3
C463
10.0K
R528
1W
12V
DZ19
8
2
5
R
4
8
8
8
2
5
R
4
8
2
8
2
5
R
4
8
7
2.
21
K
R
4
7
3
2
.4
3
K
R
4
7
4
10.0
R484
10.0
R483
1.0
35V
C462
4093B
X11
7
14
50V
0.1
C433
50V
0.1
C432
50V
0.1
C467
50V
0.1
C466
LT1014
X35
4
11
4093B
X12
7
14
X9
16
8
MC14538B
X10
16
8
50V
0.1
C445
LM224
X34
4
11
50V
0.1
C443
50K
CW
R301
3
.9
2
K
R
3
0
0
4.7
35V
C440
+15V
+15V
J28
14
50V
0.1
C439
50V
0.1
C442
50V
0.1
C456
50V
0.1
C441
MC14040
X32
8
16
MC14040
X20
8
16
1N4007
D307
1400V
.0047
C310
243
R337
1000
35V
C311
C312
1N4007
D308
J28
7
2.67K
R541
500
CW
R
3
3
9
2.67K
R543
2
.4
3
K
R
3
3
8
2.67K
R542
100
20V
C313
MC14013B
X19
7
14
1N4007
D306
1N4007
D309
ADJ
IN
OUT
s18395-23
X8
D310
15
.0
K
R
3
3
5
15
.0
R
5
1
5
X23
1
6
7
100K
R
4
5
0
OCI6
HP2231
1
2
X22
1
13
2
1N4936
D302
1N914
D424
X31
3
5
4
10.0K
R444
8
2
.5
K
R
5
6
0
X36
10
8
9
X36
11
12
13
4.75K
R537
100
R525
D402
100V
330p
C471
D410
1
5
0
K
R
5
2
3
PRI_FB
PB_START
+15V
+15V
+15V
ARC
+15V
PINCH
CFB
+15V
PINCH
PWM_EN
1014
B
B
C
NAND
1014
C
O
M
M
A
N
D
A
R
C
&
/R
A
M
P
C
T
R
L
A
PB_START SIGNAL
TO FE (SHEET 2)
FOR ENERGY
CONTROL OPTION
( SHEET 2 )
A
1014
OVERCURRENT
TRIP TIMING
X30
1
13
2
LOCAL
5
6
.2
K
R
3
0
7
P BOOST
X21
3
5
4
X24
7
6
5
10K
.294V
C
1014
P
IN
C
H
F
A
S
T
R
A
M
P
E
N
A
B
L
E
2901
C
PINCH LIMIT
500A MAX
P
IN
C
H
B
R
E
A
K
P
O
IN
T
(P
IN
C
H
K
N
E
E
)
D
PINCH COMMAND
2901
B.PT
P
IN
C
H
C
O
M
M
A
N
D
LM224
C
B
LM224
"ANALOG LOGIC"
D
17
.8
K
R
4
0
8
X34
8
9
10
8.25K
R530
15.0K
R550
1.00K
R532
X23
13
10
11
15.0K
R407
10K
R414
X23
14
8
9
10K
R412
50V
.0047
C407
X24
8
9
10
200
R413
/HOT_START
LOCAL_POTS
PB_SCALED
X34
14
13
12
2.
21
K
R
4
1
7
2.
21
K
R
4
1
8
1.0
35V
C409
1W
15V
DZ12
100K
R471
47.5K
R415
OCI2
HP2231
7
4093B
X13
7
14
10.0K
R540
RST
/Q
T2
Q
A
B
T1
X9
1
3
4
2
6
57
4.75K
R302
GROUND PLANE
POWER PLANE
NAND
NAND
OP AMP
FROM FE (SHEET 2)
ARC/SHORT DETECT
C300
A
ARC
+15V
/BALL
PINCH
METER_1
METER_2
+15V
+15V
REMOTE
PWM_EN
RAMP
+5.1V
P BOOST
OUTA
+15V
OUTB
10.0K
R539
0.
01
W
2
10.0K
R529
1.
00
M
R
4
4
8
1
0
0
K
R
4
5
9
0.
01
W
3
OCI4
HP2231
7
OCI4
HP2231
6
OCI5
HP2231
4
3
100V
330p
C470
1
0
K
C
W
R
4
4
1
X29
8
9
10
50V
.0047
C422
2
6
.7
K
R
5
3
8
50V
.0047
C414
5
6
.2
K
R
4
4
2
OCI5
HP2231
1
2
D419
1
0
0
K
R
4
4
6
X22
10
12
11
22
.1
K
R
4
9
9
4
7
5
R
4
5
8
1
0
0
R
4
4
0
50V
820p
C416
D418
D404
13
.7
K
R
4
4
7
4.75K
R468
C415
D417
6.
81
K
R
4
9
4
RST
/Q
T2
Q
A
B
T1
X10
1
3
4
2
6
5
7
OCI4
HP2231
4
3
OCI4
HP2231
1
2
/ARC
+15V
+15V
/RAMP
RAMP
START_RESET
/A
R
C
O
R
R
A
M
P
C
T
R
L
C
LM224
RAMP IN
P BOOST
120us
B
A
B
A
A
+1.42V
D
CURRENT LEVEL
"KEEP ALIVE"
SCALED_BGND
PWM OUTPUT
TO FRONT END
( SHEET 2 )
CIRCUIT
ISOLATED
A
B
(SHEET 2)
332
R430
15
.0
K
R
4
3
9
D405
B
DARLINGTON
/DON_MIN
150us MIN
ON TIME
COUNTER
NAND
NAND
DON_MIN
/C
O
U
N
T
3
.9
2
K
X15
3
2
1
X15
4
5
6
A
16
8
VDD
/C
Q7
Q12
MC14040
Q4
VSS
R
Q3
Q11
Q8
Q10
Q9
Q6
Q2
Q5
Q1
X20
13
12
14
11
10
9
15
7
6
5
4
3
1
2
X15
11
12
13
X16
3
2
1
4.75K
R557
A
50V
0.1
C307
RST
/Q
T2
Q
A
B
T1
X10
15
13
12
14
10
11
9
1N4936
D421
51
1
R
3
2
6
B
1N4936
D301
10.0K
R325
10
.0
K
R
3
3
1
1.00K
R345
DISABLE OPTION TO START
NAND
H= OPTION ENABLED
L= NO OPTION
4.75K
R323
1N4936
D422
4.75K
R322
1N4936
D420
15
.0
K
R
3
4
1
LM224
X29
4
11
A
BOOST TIME LIMIT
50V
0.1
C458
1.3 msec PLASMA
NAND
PWM_SYNC
D
OP AMP
/PB_OPTION
+15V
PINCH
PB_START
+15V
+15V
C
A
NAND
R
3
2
9
10.0K
R324
1.0
35V
C309
50V
0.1
C308
/HOT_START
ARC_START
+15V
H= OPTION PB TIME
L= LOCAL PB TIME
X31
1
13
2
3
.9
2
K
R
3
3
2
X15
10
8
9
OCI2
Vcc
GND
HP2231
5
8
50V
0.1
C429
1
0
K
R
3
1
2
50V
0.1
C425
4066B
X31
14
7
10K
R455
/RESET
CFB
RESET
+5.1V
OUTA OUTB
50V
0.1
C426
X12
10
8
9
SWITCH
SWITCH
X14
4
5
6
10K
R316
3
9
.2
K
R
31
1
10.0K
R310
B
A
L
L
_O
R
_F
U
S
E
PWM
2901
B
1V=100A
D
NAND
NAND
C
NAND
3.1V
1014
D
1V
RST
/Q
T2
Q
A
B
T1
X9
15
13
12
14
10
11
9
2
4
.3
K
R
5
5
3
C
4
7
4
1
0
0
K
CW
R
3
1
3
X35
14
13
12
X17
10
8
9
15.0K
R554
C304
4066B
X22
14
7
50V
0.1
C457
CFB
/PINCH
+5.1V
+15V
+15V
3
3
.2
K
R
5
1
7
OVERCURRENT TRIP
3
3
.2
K
R
5
1
6
X35
8
9
10
+15V
+15V
FUSE
+15V
50V
0.1
C438
DV/DT
NAND
FROM FE (SHEET 2)
DV/DT LEVEL DETECT
4093B
X18
7
14
4093B
X14
7
14
D
4066B
X21
14
7
4093B
X36
7
14
X11
4
5
6
X16
11
12
13
D305
OCI1
HP2231
4
3
50V
0.1
C468
D300
FUSE
+15V
PINCH
ARC
+15V
+15V
NAND
FUSE GEN.
DV/DT
1ms
B
REPETITIOUS
PINCH LIMITER
COUNTER
FORCES THIRD CONSECUTIVE
PINCH TO BREAK INTO ARC
DV/DT KILLER
/K
IL
L
E
R
NAND
SWITCH
NAND
NAND
NAND
NAND
BALL
A
/KILLER
KILL_RC
C
NAND
PINCH KILLER Varc
ADJUST FE (SHEET 2)
D
NAND
D
/K
IL
L
E
R
NAND
KILLER
KILL_START
B
750us
/KILLER
BALL_OR_FUSE
B
D
NAND
3
.9
2
K
R
3
0
8
4.75K
R340
OCI2
HP2231
6
50V
0.1
C434
50V
0.1
C435
50V
0.1
C436
50V
0.1
C444
50V
0.1
C437
4093B
X17
7
14
4093B
X16
7
14
4093B
X15
7
14
16
8
VDD
/C
Q7
Q12
MC14040
Q4
VSS
R
Q3
Q11
Q8
Q10
Q9
Q6
Q2
Q5
Q1
X32
13
12
14
11
10
9
15
7
6
5
4
3
1
2
X17
11
12
13
C302
X13
3
2
1
Q3
2N4401
X11
10
8
9
10.0K
R333
4.75K
R305
1
0
0
K
C
W
R
3
0
4
3
3
.2
K
R
3
0
9
X13
4
5
6
100V
330p
C303
10K
R314
Q7
2N4403
75
.0
R
5
1
2
X13
11
12
13
4.75K
R334
X11
11
12
13
50V
2700p
C475
4.75K
R306
332K
R562
10
.0
K
R
5
6
1
X12
4
5
6
X12
11
12
13
5.62K
R303
100V
100p
C301
X36
3
2
1
D411
X12
3
2
1
10.0K
R509
10
.0
K
R
5
6
3
1N914
D423
X11
3
2
1
X28
13
10
11
150K
R524
100K
R559
12Vdc
CR1
C
/RESET
/ARC
PINCH
+15V
/BALL
/PINCH
ARC
/RESET
+15V
+5.1V
+15V
+15V
FUSE
START
FUSE_RESET
C
NAND
B
A
NAND
B
AMPS>100
A
NAND
/ARC
NAND
NAND
A
BALL_DELAYED
OUTPUT DISABLE
OVERCURRENT
B
/BALL_DELAYED
/(BALL & SHORT)
OVERCURRENT FAULT
( SHEET 2 )
TO TRIGGER CIRCUIT
ARC
B
RESET
PULSE
NAND
/BALL_RC
C
NAND
/KILLER
D
2901
NAND
/ARC
NAND
A
/RESET
A
NAND
150us FUSE ENTRY
ARC KILLER PULSE
1N4936
D416
X17
3
2
1
X13
10
8
9
ARC
/RAMP
+15V
CW
SHORT OR 500K POT
500K
TAIL OUT
A
BACKGROUND COMMAND
D
NAND
D
INCREASE TAILOUT
DURING HOT START
C
L
O
C
A
L
B
G
P
O
T
10.0
R434
J2
11
J2
14
82.5K
R443
C406
J2
5
J2
7
267K
R490
10.0K
R435
D414
X31
8
6
9
1.00M
R
4
4
9
10.0K
R445
50V
0.1
C450
50V
2700p
C417
D409
X24
14
13
12
D403
REMOTE_POTS
X29
7
6
5
/HOT_START
+15V
+15V
HOT_START
REMOTE
+15V
ARC_START
1.0
35V
C447
D408
HOT_START
REMOTE
LOCAL
DURING HOT START
11% BACKGROUND INCREASE
LM224
Unused Devices
D
C
LM224
TIMING
HOT START
GENERATOR
D
R
E
M
O
T
E
B
G
P
O
T
CW
CW
10K
LM224
B
J27
5
J2
3
100
R491
J27
7
2.67K
R547
2.67K
R549
10.0
R492
2.67K
R548
100
R493
J27
6
1.
00
M
R
5
3
4
2.67K
R495
X29
1
2
3
20.0K
R498
150K
R497
1.
00
M
R
5
2
0
D415
1W
12V
DZ16
X30
8
6
9
X30
10
12
11
C455
C454
1
0
0
K
R
4
8
0
+15V
1.
00
M
R
4
7
6
D406
1W
12V
DZ15
10.0K
R478
1W
12V
DZ17
1.0
35V
C452
X29
14
13
12
1.0
35V
C451
1
0
0
R
4
7
7
10
.0
K
R
4
7
5
C449
C405
+15V
J2
1
4
.7
5
K
R
5
5
6
X23
2
4
5
10K
CW
R328
Q2
2N4401
1
0
0
R
3
4
2
10
.0
K
R
3
3
0
51
1
R
3
2
7
J28
1
D304
X18
11
12
13
J28
8
2.
21
K
R
3
4
3
100
R470
J2
4
50V
0.1
C424
OCI3
Vcc
GND
HP2231
5
8
+15V
/PB_OPTION
/PB_LOCAL
P BOOST
SS_WIRE
+15V
ON
OPTO
H = STAINLESS
L = MILD
C
L=DISABLE LOCAL PB TIME
ISOLATOR
BOARD
D
O
N
_R
E
S
E
T
B
2901
H= OPTION PB TIME
1W
15V
DZ8
2.
21
K
R
3
4
4
TO FE (SHEET 2)
FOR ENERGY CONTROL
OPTION
WIRE TYPE POSITION
X18
10
8
9
+5.1V
L=
O
P
T
IO
N
P
B
T
IM
E
D
L=DISABLE OPTION PB TIME
B
DARL. DRIVE
OCI6
HP2231
4
3
100
R433
50V
0.1
C430
X18
4
5
6
J2
6
J2
12
J2
8
J2
9
J2
13
J2
2
5-19-95
5-24-96E
2781-A
27
81
-A
G-6
R
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tu
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to
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c
ti
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T
O
C
R
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to
S
e
c
ti
o
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T
O
C
R
e
tu
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to
S
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c
ti
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T
O
C
R
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tu
rn
to
S
e
c
ti
o
n
T
O
C
R
e
tu
rn
to
M
a
s
te
r
T
O
C
R
e
tu
rn
to
M
a
s
te
r
T
O
C
R
e
tu
rn
to
M
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M
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C
Schematic - Control PC Board - Codes 10151 - 11092 - (G2781 Sheet 1 of 2)
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.
