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G-7
ELECTRICAL DIAGRAMS
INVER
TEC S
TT & S
TT II
G-7
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Schematic - Control PC Board - Codes 10151 - 11092 - (G2781 Sheet 2 of 2)
NO
TE:
Linc
oln Elec
tric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty.
Individual Print
ed Circuit Board Components are not available from Lincoln Electric.
This in
f
ormation 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.
OCI2
HP2231
4
3
4
7.5K
R211
X28
2
4
5
J
4
3
X28
1
6
7
1
N4936
D200
1.00K
R
200
J4
8
26.7
R206
47.5K
R231
10.0
R230
CNY17-3
OCI7
4
2
1
6
5
1.30K
R
220
+
t
6
0V
.
13
R239
2
.21K
R
216
J
4
2
1
W
4
3V
D
Z4
CR1
1
1
9
1
3
1
.30K
R218
1
.30K
R217
( SHEET 1 )
PWM ENABLE
OCI2
H
P2231
1
2
TO DIGITAL LOGIC
( SHEET 1 )
DV/DT LEVEL DETECT
( SHEET 1 )
( SHEET 1 )
PINCH KILLER
Varc ADJUST
ARC/SHORT DETECT
TO DIGITAL LOGIC
Y
CURRENT
TRANS.
Y
B
OARD
OVERVOLTAGE
ON POWER
T
RIGGER
OPTOCOUPLER
FEEDBACK 125:1 RATIO
PRIMARY CURRENT
CIRCUIT
TRIGGER
TSTAT
2
4 VAC
TSTAT
CHOKE
B
OARD
OPTOCOUPLERS
ON PROTECTION
T
1 AUX XFMR
OVERHEAT INDICATOR
1
5
0
FA
N
R
5
W
FAN
Y
FROM SHEET 1
OVERCURRENT FAULT
1
N4936
D205
2
2.1K
R210
C203
J
4
6
J4
10
TO ANALOG LOGIC
TRIGGER
INTERFACE
( SHEET 1 )
J
4
11
1.30K
R
219
J4
1
2
1
.30K
R221
J
4
5
1
W
43V
DZ5
1
.30K
R
224
1
.30K
R
223
4
093B
X6
7
1
4
1
N4007
D108
J
5
8
C112
5
00
C
W
R158
X4
14
13
12
1N4007
D109
J5
27
3
5V
C
119
243
R157
1
.82K
R156
1000
35V
C
111
J17
6
50V
0.1
C125
D
107
SMP04
X
3
D
gnd
V
ss
Vdd
8
1
6
1
3
50V
0.1
C
121
27
3
5V
C117
J
17
12
1400V
.
0047
C
113
J
5
4
D114
C
120
OP470
X4
V+
V-
4
1
1
5
0V
0.1
C
124
A
DJ
I
N
O
UT
s
15128-15k1
X
1
D112
OUT
IN
G
ND
X2
s15128-12
D113
47
3
5V
C
115
C116
J17
11
1400V
.0047
C
114
1N4007
D110
1N4007
D111
J
17
5
+12VFE
+
12VFE
FE
+12VFE
FE
X
6
4
5
6
5
0V
0.1
C
126
OCI6
HP2231
6
X4
8
9
10
+
12VFE
-15VFE
C
OMPARATOR
FEFE
50V
0.1
C
128
50V
0.1
C127
OCI6
Vcc
GND
HP2231
5
8
50V
0.1
C
122
OCI1
Vcc
GND
HP2231
5
8
50V
0.1
C
129
LM2901
X5
3
1
2
50V
0.1
C123
C118
+
12V OUT
X
FMR
1
8 VAC
18 VAC
C
T
3
6 VAC
COMMON OUT
-15V OUT
O
P AMP
7915
A
Energy
Trigger Circuit
I/O and Vac
Option
J5
1
8
5
4
Front End
Vac and Varc
7
6
12
1
J4
7
6
12
1
J17
Control
ENERGY
CONTROL
OPTION
NEG FE POWER NET
D
OP470
POWER SUPPLY FOR "FRONT END"
H = STAINLESS
L
= MILD STEEL
B
UNUSED GATES
C
O
P470
N
AND
C
POS FE POWER PLANE
OCI5
Vcc
GND
HP2231
5
8
J
17
3
+
12VFE
FE
ISOLATED CIRCUIT
LM350
N
AND
POS FE POWER PLANE
FE GROUND PLANE
SENSE PANEL
ENERGY CONTROL
P
HASE B
G
FRONT END
+
STUD
INPUT FROM
-
STUD
V
OLTAGE
H
= START PLASMA BOOST TIMING
L
= NOT PLASMA BOOST
OCI6
HP2231
7
OCI1
HP2231
7
J
17
1
THE LINCOLN ELECTRIC CO.
E
NERGY CONTROL OPTION
WITH PUBLISHED STANDARDS
Ch'ge.Sht.No.
SCALE
DATE
NONE
EARTH GROUND CONNECTION
Q10
OCI7
LABELS
X
36
129, 211, 314, 475
D-
165, 242, 345, 564
LAST NO. USED
C-
R-
SUPPLY
POWER SUPPLY SOURCE POINT
COMMON CONNECTION
VOLTAGE NET
FRAME CONNECTION
NOTES :
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
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
DZ20
117, 211, 310, 424
( SHEET 1 )
ENERGY CONTROL
PINCH SIGNAL FOR
OPTION ENABLE
ENERGY CONTROL
OPTION P BOOST
TIME ( SHEET 1 )
-15VFE
FE
-15VFE
WIRE TYPE POSITION
CLEVELAND, OHIO U.S.A.
SUBJECT
TYPE
G
STT CONTROL
NO.
SHT.
04/04/94
MLD
CHK.
DR.
SUP'S'D'G.
200 SERIES- TRIGGER CIRCUIT (SHEET 2)
400 SERIES- ANALOG LOGIC CIRCUIT (SHEET 1)
ELECTRICAL SYMBOLS PER E1537
UNLESS OTHERWISE SPECIFIED)
300 SERIES- DIGITAL LOGIC CIRCUIT (SHEET 1)
EQUIP.
DIODES =
+
t
5
6
R
238
CAPACITORS =
1A, 400V
(UNLESS OTHERWISE SPECIFIED)
100 SERIES- ARC SENSE CIRCUIT (SHEET 2)
REFERENCE DESIGNATOR SERIES DEFINITIONS
MATERIAL TOLERANCE ("t") TO AGREE
ON ALL ANGLES IS + .5 OF A DEGREE
UNLESS OTHERWISE SPECIFIED TOLERANCE
ON 2 PLACE DECIMALS IS + .O2
ON HOLES SIZES PER E-2056
ON 3 PLACE DECIMALS IS + .OO2
MFD
RESISTORS = Ohms (
.022/50V
1/4W
GENERAL INFORMATION
SCHEMATIC (Sheet 2 of 2)
(
UNLESS OTHERWISE SPECIFIED)
W4
ENERGY CONTROL OPTION
( SHEET 1 )
U
NUSED
T
O POWER
I
SOLATED CIRCUIT
B
OARD
TRIGGER
CD
ON SHEET 1
X28 "D" COMPARITOR
C
OMPARATOR
FILE: G2781_1D1
PB_START SIGNAL FOR
ENERGY CONTROL OPTION
( SHEET 1 )
( SHEET 1 )
+
15V
J4
4
J
4
1
J
4
9
LM2901
X
28
3
12
J
4
7
50V
0.1
C211
100V
100p
C105
1N914
D116
X5
14
8
9
10K
R142
X3
S
MP04
1
7
5
50V
820p
C110
825
R165
3.92K
R
164
22.1K
R132
X
3
SMP04
1
4
10
12
S
MP
_
S
T
R
O
B
E
13.7K
R
122
+12VFE
+
12VFE
FE
C
O
LD DV/DT
V
arc SAMPLE
SHORT DETECT
Varc SAMPLE
D
H=LOW DV/DT
L=HIGH DV/DT
D
V/DT 10X
A
MPLIFIER
ARC
DETECTOR
A
2
2901
A
ARC
A
R
C
_
T
R
IP
OP470
B
DV/DT
2
2
901
dv/dt
B
B
DV/DT SAMPLE PULSE
D
2
901
1
0K
R
148
1
0K
R145
100K
R143
J
17
4
68.1K
R127
1.00M
R
124
X
5
2
4
5
X4
7
6
5
100K
R144
X5
13
10
11
8.25K
R146
68.1K
R123
47.5K
R114
100V
1
00p
C103
51.1K
R126
10K
R147
1
N914
D117
4
.75K
R128
50V
820p
C
109
X
3
SMP04
15
9
11
1N914
D102
4.75K
R125
2
67K
R
135
13.7K
R
116
13.7K
R
118
1
N4007
D100
26.7K
R129
1
3.7K
R120
5
0V
.0047
C104
20.0K
R162
1
W
12V
DZ2
20.0K
R108
D
T
J17
8
X
6
11
1
2
13
1
N4936
D105
1N4936
D
106
J
17
9
1.50K
R155
OCI5
H
P2231
6
1
00V
3
30p
C106
X6
1
0
8
9
O
CI3
H
P2231
4
3
J17
7
O
CI3
H
P2231
1
2
681
R151
J17
2
1.50K
R161
332
R149
1
.50K
R160
X
6
3
2
1
4.75K
R136
1N914
D
115
1.00K
R134
3.92K
R
163
47.5K
R133
3.92K
R130
1
.50K
R154
O
CI5
H
P2231
7
3.92K
R131
1N914
D
103
5K
CW
R150
1N914
D
104
O
CI1
HP2231
6
3.92K
R152
Q
1
2
N4401
3
.92K
R153
X5
1
6
7
1W
1
5V
D
Z3
FE
FE
+
12VFE
NEG_CLAMP
FE
FE
DT_DELAYED O
UT
B
2901
A
C
DT_DELAYED
D
DT_RC
OPTION ENABLE
PHASE A
OPTION P BOOST
TIME
ENERGY CONTROL
D
IODE ON = OPTION P_BOOST TIME
D
IODE OFF = LOCAL P_BOOST TIME
OR NOT OPTION
P_BOOST TIME
B
A
L = NOT PINCH
H = PINCH
A
DIODE ON = OPTION ENABLED
DIODE OFF = OPTION DISABLED
1.89V NORMAL
2.3V PINCH START
F
OR INITIAL
A
RC DETECTOR
PINCH PULSE
A
DJUSTMENT
H
=SHORT
L
=ARC
B
PWM
FROM
FROM
PWM
DT
DT
A
TRUNCATES DT_DELAYED
B
13.7K
R102
13.7K
R100
2.67K
R138
J17
1
0
J5
3
J
5
+12VFE
+
12VFE
FE
CONTROL OPTION
T
O ENERGY
V
arc FILTERED
ARC VOLT FILTER
1
00V
100p
C102
13.7K
R106
13.7K
R104
13.7K
R107
13.7K
R105
13.7K
R103
13.7K
R101
B
8.95V
2901
C
R 1
( UNUSED
T
O POWER BOARD
CONTACT )
L=PWM OFF
H
=PWM ON
100K
R235
C202
15.0K
R212
100V
330p
C205
47.5K
R215
50V
0.1
C204
10K
R
214
D
211
50V
2
0
C
207
2
67
R
229
1W
3
.3V
D
Z6
D210
D209
10K
R240
D208D207
1.50K
R
227
1
.50K
R226
1
.50K
R228
1
.50K
R
225
CR1
6
8
4
D
206
1
.30K
R222
ON=TRIGGER ON
O
FF=TRIGGER OFF
P
WM_EN
PRI_FB
+15V
+15V
+15V
+
15V
3
.6V
L
=PWM ON
H
=PWM OFF
1.7V = 150A PRIMARY
C
2901
2901
A
( SHEET 1 )
10K
R213
10K
R237
X
28
14
8
9
10.0
R203
10.0
R201
10.0
R202
10.0
R204
1
N4936
D
202
1
N4936
D
201
1.30K
R242
10.0
R205
C
201
26.7
R209
26.7
R207
267
R241
26.7
R
208
+15V
1
N4936
D
203
1
N4936
D204
200V
.33
C200
100K
R232
10K
R236
332K
R
234
C206
10K
R233
A
O
P470
VARC_SCALED
13.7K
R
115
5
0V
0
.1
C107
10K
C
W
R140
B
TURN
1
0
.
400V
243
R139
X3
SMP04
2
6
3
J
5
1
1.8
2
0V
C
108
10K
R137
8.25K
R141
4.75K
R159
13.7K
R
121
X4
1
2
3
4
7.5K
R110
4.75K
R113
DV/DT Varc
SAMPLE
DV/DT
D
E
R
IV
A
T
IV
E
_
T
R
IP
A
Varc SAMPLE
NEW DV/DT
1V REF
1
N914
D101
J5
5
13.7K
R
117
1
3.7K
R119
J5
6
FE
F
E
NEG_CLAMP
FE
+
12VFE
FE
+
12VFE
+
12VFE
F
E
F
E
+12VFE
+
12VFE
+12VFE
F
E
FE
3000V
.0047
C100
47.5K
R112
1
W
12V
DZ1
400V
.001
C
101
4.75K
R111
47.5K
R109
2781-B
FV
2781-
B
5-19-95
2
7
5-24-96E