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G-6
ELECTRICAL DIAGRAMS
IDEALARC DC1000
Control PC Board (G1585) Schematic
1.00K
R22
J1
10
100V
.047
C6
162
R133
75.0
R142
100V
.047
C29
10K
J1
8
15.0K
R25
1N4004
D35
J2
8
1N4004
D24
LED3
J2
7
1N4004
D26
50V
.022
C18
1N4004
D18
2.21K
R27
1K
CW
R38
77
74
75
SW.3
226
1N4004
D12
332
R74
18
15V
C4
2N6027
QU2
224
"N"
R1
73
233
75
C.V.I. MIN.
TRIM
"N"
-6.2V
-6.2V
-6.2V
"N"
2.21K
R37
100V
.047
C5
1W
15V
DZ9
1/2W
15
R73
1K
CW
R26
332
R148
-10V
T.S.3
76
VV
CVI
CVS
73
238
OUTPUT TRIM CIRCUIT
J1
7
75.0
R112
2
50V
C17
500mW
3V
DZ7
162
R82
1N4004
D23
15.0K
R18
1.3K
R83
VOLTAGE FEEDBACK
1N4004
D8
2.21K
R81
1W
15V
DZ13
1.00K
R59
2N4857
Q9
681
R84
100V
.22
C21
"L"
-10V
+16V
1.00K
R6
1N4004
D28
2N6027
QU1
LED4
1N4004
D7
4.75K
R16
39.2K
R20
1.3K
R143
1.00M
R24
100K
R19
1W
15V
DZ6
600mA
40V
Q4
39.2K
R17
20
R147
1.00M
R5
18
15V
C12
68.1K
R35
15
R114
J2
4
475
R21
1.00K
R60
5W
700
R3
475
R85
4A
400V
SCR1
35V
1.0
C22
332
R70
1.8
20V
C3
1N4004
D9
+55V
+16V
+16V
"M"
-10V
"N"
B
229
20
R23
J1
13
600V
.02
C14
475K
R48
15W
200
R1
2.67K
R8
POWER SUPPLY
+16V
+55V
-6.2V
1N4004
D5
LED1
1N4007
D2
120V. AC
255
150K
R146
150V
45J
TP1
150K
R2
1.50K
R65
332
R46
1.00K
R107
1.3K
R50
J1
3
6.81K
R89
1N4004
D6
68.1K
R92
500mW
8.2V
DZ5
100V
.22
C27
22.1K
R110
100V
.047
C24
lm224
X2
8
9
10
10K
R80
10K
R94
68.1K
R91
1N4004
D36
230
10K
R98
100K
R79
2N4857
Q2
J2
1
"L"
"H"
-10V
-10V
"P"
"H"
"K"
V F.B.
"J"
"M"
-10V
"P"
CVI
SW.4
266
H
(FOR V.V. TAIL-OUT)
"LOW" WITH OUTPUT
VOLTAGE BELOW 10V.
CVS
CURRENT. ("P" DELAYED
STARTING CIRCUITS.)
100
R108
LOW WITH NO OUTPUT
FOR FAST RESPONSE
1N4004
D19
500mW
25V
DZ14
2.7
75V
C10
50
15V
C26
1.00M
R103
1.00M
R115
2N4857
Q7
1N4004
D34
lm224
X2
5
7
6
15.0K
R88
221K
R90
1W
15V
DZ12
1N4007
D3
J1
11
24.3K
R145
18
15V
C8
20K
CW
R39
15.0K
R29
100V
.047
C7
1N4004
D33
50V
.022
C1
J2
6
1.00K
R87
4.75K
R77
4.75K
R30
2N4857
Q5
100K
R78
V.V. MIN.
LM224
X2
4
11
600V
.02
C19
15W
200
R113
J1
14
47.5
R136
47.5
R111
1N4004
D27
-10V
-10V
+16V
V REF.
-6.2V
-10V
"N"
"H"
NOTES :
256
74
OUTPUT TRIM AND
REFERENCE CIRCUIT
TRIM
1N4004
D29
100V
.047
C30
5W
10V
DZ2
301
R13
1N4007
D4
J3
1
J3
2
4.75K
R62
1N4004
D16
1N4004
D31
600V
.02
C23
1N4004
D15
1N4004
D14
100V
.047
C13
22.1K
R52
267K
R11
68.1K
R53
1N4004
D10
47.5
R66
1N4004
D11
221K
R9
CW
50K
R10
5W
16V
DZ1
4.75K
R71
100V
.047
C25
1N4004
D17
J1
12
475
R61
47
160V
C2
1.00K
R105
600mA
40V
Q3
1N4007
D1
lm224
X1
12
14
13
+
-10V
+16V
-6.2V
215 210
-
TO 50mV @ 1300 AMP SHUNT
CURRENT FEEDBACK
C
OVER-CURRENT AND FAULT PROTECTION
+
CR2
235
VOLTS TRIM
MAX CONTROL
TO FIRING BOARD
CONTROL SIGNAL
68.1K
R12
LED5
100K
R100
267
R41
4.75K
R32
1W
12V
DZ15
68.1K
R93
D
221K
R96
lm224
X2
14
13
12
4.75K
R28
ERROR AMPLIFIER
2N4857
Q6
1N4004
D25
100K
CW
R34
1.00M
R15
600V
.02
C9
lm224
X1
8
10
9
(FOR O.C.V. BOOST)
47.5K
R14
40V
600mA
Q1
1W
10V
DZ4
4.75K
R31
1N4004
D30
82.5K
R104
"J"
"K"
+16V
V REF.
V F.B.
+16V
K
"LOW" WITH
OUTPUT CURRENT
1.50K
R40
L
500MW
25V
DZ8
J1
2
CC
1N4004
D13
82.5K
R55
LED2
1/2W
15
R102
500mW
5.1V
DZ10
1.00K
R106
8556
1N4004
D32
1W
27K
R54
CVI
STARTING LOGIC
TRIM
C.V.S. MAX.
CC
33mH
L1
82.5K
R56
"H"
18
15V
C11
1N4004
D20
OUTPUT STUD
TO NEGATIVE
(FOR START-LOW CLAMP)
VOLTAGE OR CURRENT.
HIGH WITH NO OUTPUT
222
2N4857
Q8
22.1K
R99
CVS
CANADA
FRANCE
AUSTRALIA
15.0K
R57
lm224
X2
3
1
2
J1
1
J2
5
500mW
8.2V
DZ11
.47
50V
C15
267
R97
J1
9
-10V
221
220
TO POS. OUTPUT STUD
231
215
CVS
CC
CVI
221K
R95
J1
5
100V
.047
C28
5W
470
R4
2.67K
R7
lm224
X1
1
3
2
1.50K
R64
50K
CW
R63
2.21K
R58
50
15V
C16
221K
R76
267
R47
1.00K
R86
50V
.022
C20
.4W
6.2V
DZ3
DR.
148
UNLESS OTHERWISE SPECIFIED)
UNLESS OTHERWISE SPECIFIED)
EQUIP.
(UNLESS OTHERWISE SPECIFIED)
ELECTRICAL SYMBOLS PER E1537
SCALE
THE LINCOLN ELECTRIC CO.
03-13-90
CLEVELAND, OHIO U.S.A.
CHK.
JLV
TYPE
SUBJECT
.022/50V
DATE
NONE
1A, 400V
CAPACITORS =
(
MFD
RESISTORS = Ohms (
DIODES =
1/4W
Ch'ge.Sht.No.
GENERAL INFORMATION
LABELS
D-
C-
30
R-
LAST NO. USED
36
TEST POINT
EARTH GROUND CONNECTION
POWER SUPPLY SOURCE POINT
SUPPLY
VOLTAGE NET
COMMON CONNECTION
FRAME CONNECTION
NO.
SUP'S'D'G.
L
SHT.
8556
LM224
X1
4
11
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
WITH PUBLISHED STANDARDS
A
UNLESS OTHERWISE SPECIFIED TOLERANCE
MATERIAL TOLERANCE ("t") TO AGREE
NUMBER.
ON 2 PLACE DECIMALS IS + .O2
ON ALL ANGLES IS + .5 OF A DEGREE
ON HOLES SIZES PER E-2056
ON 3 PLACE DECIMALS IS + .OO2
CONTROL BOARD SCHEMATIC
DC-1000
CR3
CURRENT
ACTIVATED
REED SWITCH
SW4
SW4
SW.4A
J.J.
266
2-19-93G
G-6
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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.