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ELECTRICAL DIAGRAMS
G-5 G-5
IDEALARC CV-400
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+15V
1W
6.2V
DZ12
PILOT
R177-R189=68.1K 1/4W
OUTPUT
CIRCUIT
15W
1.5K
R150
R178
10W
160
R151
R179
243
R174
R177
D81
243
R173
R180
15W
1.5K
R149
R185
R184
5W
15V
DZ13
R188
R186
R187
5W
24V
DZ14
D82
243
R172
R189
R182
R181
R183
D76
D75
D78
D77
CNY17-3
OCI1
42
1
6
5
100K
R153
100
R152
D33
1W
15V
DZ5
LM224
X2
4
11
C30
J1
5
LM224
X1
4
11
-10V
-10V
+15V
100K
R51
2.21K
R50
X1
1
2
3
FIRING CIRCUIT
-10V
+
t
56
R79
267
R76
J2
8
C17
D32
204
C31
X2
14
13
12
LM224
X3
4
11
X1
7
6
5
75
BUFFER
MIN. OUTPUT
2.70
2.5W
R40
47
35V
C39
10K
R143
10K
R142
2.70
2.5W
R41
600V
D68
600V
D70
150
50V
C40
600V
D21
600V
D69
600V
D19
D22
221K
R155
5W
1K
R141
J1
3
10K
R144
J1
2
600V
D20
201
+15V
203
202
203
L
202
201
9148
METERS
205
4
206
L
K
SUPPLY
A
METERS
2
600V
D71
600V
D73
600V
D72
J1
6
J1
7
J1
1
150
50V
C43
100V
.047
C38
J2
6
J2
2
100V
.047
C37
J2
5
475
R35
J2
1
5W
10V
DZ10
150
R43
50K
CW
R38
10W
250
R148
-10V
-10V
+15V
150
R36
J1
4
1W
15V
DZ3
4.75K
R93
475
R87
75.0
R197
75.0
R198
D3
75.0
R199
1.00K
R22
5W
68
R114
D15 D18
D67
D12
2.67K
R6
D9
J2
3
D5
267
R16
D34
1.82K
R115
1.8
20V
C22
10K
CW
R71
4A
400V
SCR3
203
4.7
35V
C3
D6
100K
R31
2N6027
QU3
C18
100
R75
200V
.15
C5
X1
14
13
12
50K
CW
R28
562
R165
1.50K
R77
D35
+
t
56
R81
C9
562
R162
J2
7
200V
.15
C6
C12
100K
R13
+
t
56
R78
200
R171
2.67K
R9
12.1K
R70
J
212
PRESET
START
D50
D37
10K
R91
D83
100K
R30
267
R168
15.0K
R94
X3
1
2
3
100K
R175
N
4.7
35V
C2
2N6027
QU2
200
R170
C8
D49
10K
R64
15.0K
R90
1.8
20V
C20
1.00K
R63
4.75K
R18
2.67K
R8
D8
4.75K
R19
D79
X1
8
9
10
2.21K
R61
100K
R59
D51
10K
R83
50V
0.1
C46
2.67K
R154
SWITCH
100K
R56
X3
7
6
5
CURRENT
X2
1
2
3
2.21K
R58
CURRENT
LIMITER
G
E
CURRENT
TRIM
OFFSET
AMP
AMP
CURRENT
-10V
+15V
+15V
+15V
+15V
221K
R37
+15V
1.00K
R60
10K
R176
43.2K
R39
D31
4.7
35V
C24
221K
R62
D55
100K
R57
1.8
20V
C15
10K
R124
475K
R89
D80
D23
5W
17V
DZ9
+15V
+15V
OUTPUT CLAMP
D
SUPPLY
D47
1.50K
R159
10K
R145
X3
14
13
12
D74
4.7
35V
C41
GND
IN
OUT
X5
2.67K
R146
13.7K
R157
1.50K
R158
D41
4.32K
R191
1.00K
R190
100V
.15
C23
15.0K
R134
D14
100K
R29
X3
8
9
10
D48
D66
5W
68
R113
75.0
R194
D2
1.00K
R21
4A
400V
SCR2
75.0
R195
475
R86
75.0
R196
-10V
CONTROL
-10V
M
I
267
R14
1W
15V
DZ2
100K
R12
267
R15
4.75K
R17
D4
200V
.15
C4
200
R169
2.67K
R7
475
R10
267
R166
1.00K
R20
D7
D13
2.67K
R4
100K
R11
D11
2N6027
QU1
50K
CW
R26
202
D1
D40
4.7
35V
C36
33.2K
R88
100K
R137
D
S
2N4857
Q8
221K
R135
50V
.33
C35
D63
22.1K
R95
15.0K
R139
2.67K
R5
267
R167
C7
75.0
R2
1W
15V
DZ1
4.7
35V
C1
75.0
R1
75.0
R3
J2
4
VOLTAGE BUFFER
RECTIFIER BRIDGE
PROTECTION
CAPACITOR
OVER-VOLTAGE
G2
10K
R140
D42
1400V
.0047
C45
13.7K
R156
5W
68
R112
H
G1
220
D17
1.82K
R193
475K
R99
X2
8
9
10
X2
7
6
5
10K
R98
2.00K
R192
562
R160
C10
J3
2
D65
+15V
201
POWER UP
D10
J3
1
X4
TL431
REF
8
1
6
D16
4A
400V
SCR1
562
R163
50K
CW
R27
562
R161
562
R164
D62
J3
4
C11
4.7
35V
C44
J3
3
+15V
D
G
S
15A
60V
Q2
204
G3
L
9148
D52
-10V
+15V
J1
8
240
BUFFER
MAX. OUTPUT
213
41
4.75K
R82
C19
7-18-97J
Control PC Board (G2629-1) Schematic
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 com-
promise 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.