Control Pc Board (G1585) Schematic - Lincoln Electric IDEALARC DC 1000 SVM123-A Service Manual

G-6

Control PC Board (G1585) Schematic

68.1K
6
"K" X2
7
5
HIGH WITH NO OUTPUT
lm224
VOLTAGE OR CURRENT.
(FOR START-LOW CLAMP) 221K
-10V
Q7
2N4857
100K
"H" R115
1.00M
DZ14
25V
5 0 0 m W
C10
2.7
75V
D13
LED2
1N4004
TO NEGATIVE
27K
OUTPUT STUD
1W L1
J1
222
2
33mH
"N"
"M"
VOLTAGE FEEDBACK
1.3K
1.3K
DZ8
+16V
25V
5 0 0 M W
Q4
600mA
40V
DZ6
15V 681
4.75K
1W D8
1N4004
1.00M -10V
LED4
39.2K
D7
1N4004
C4
18
15V
-10V
DZ9
15V
1W
2.21K
C.V.S. MAX. 1K
TRIM
R73
C W
15 332
1/2W
D12
1N4004
-6.2V
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.
STARTING LOGIC
DZ5
C27 6.81K 10K
8.2V .22
22.1K
5 0 0 m W C24
100V
.047
10 100V
8
X2
9
D34
"LOW" WITH OUTPUT
1N4004
VOLTAGE BELOW 10V.
lm224
68.1K 10K
15.0K (FOR V.V. TAIL-OUT)
"P"
D6
-10V
1N4004
D36
H
"M"
1N4004
10K
LOW WITH NO OUTPUT
CURRENT. ("P" DELAYED
"H" R98
FOR FAST RESPONSE
332 STARTING CIRCUITS.)
R108
D19
100
1N4004
Q2
2N4857
C26
50
1.3K
15V
R103 "J"
"P"
1.00M
V F.B. -10V
SW.4
266
1.00K
J2
CVS 1
J1 230 DZ12
CVI
3
15V
1W C11
266
CC
82.5K
R102 R57
1.00K
15 15.0K
18
1/2W
15V
22.1K
R99
SW4 Q8
D32 2N4857
1N4004
DZ10 CVS D20
82.5K
5.1V 1N4004
CVI
5 0 0 m W "H"
CC
C21
-10V
68.1K .22
100V
229
J2
4 R21
475
C22
1.0
35V
15
C12
18
15V
R81 R60 R59
2.21K 1.00K 1.00K
Q9
2N4857
DZ13
15V
1W
"L"
+55V
+16V
D9
+16V
D28 700
1N4004 39.2K
1.00K
1N4004 5 W
475 100K
1.00M
R147 SCR1
4A
QU1 20
C3 2N6027 400V
1.8
20V
R23
QU2 20
15.0K
2N6027 1.00K
C18
.022
15.0K
50V
DZ7
C6
3V
"N" .047
5 0 0 m W
100V
1K
R82 R133
C W
162 162
C5
D23
.047 C.V.I. MIN.
100V 1N4004
TRIM
R74 R148
332
2.21K
OUTPUT TRIM CIRCUIT
-6.2V
-6.2V
ELECTRICAL DIAGRAMS
J2
5
TO POS. OUTPUT STUD
215
SW4
CVS CR3
"L"
CURRENT
ACTIVATED 12
220
REED SWITCH
CVI
X2
5
J1
13
CC 1
221
J1
lm224
68.1K
267
C28 DZ11
C15
8.2V
.047
.47
100V 5 0 0 m W
50V
2
X2
1
3
lm224
ERROR AMPLIFIER
221K 221K
V F.B. R28
4.75K
V REF. R31
4.75K
-10V
+16V
267
82.5K
C16
50
15V
221K
2.21K
TO 50mV @ 1300 AMP SHUNT
C13
R52
215 210
D31
22.1K
100V CURRENT FEEDBACK + -
1N4004
.047
R53
2 1
68.1K
+16V
J3 J3
1.50K
R64
Q3 13
D15
X1 D14 C W
600mA C14
14 47.5
.02
40V
12 50K 600V
lm224
1N4004 1N4004 1.50K R8
R65 2.67K
B
D16
475K
1N4004
C23
475
.02
4.75K
600V
255 13
-6.2V
-10V
120V. AC
1N4004
OVER-CURRENT AND FAULT PROTECTION
256
235
J1
12
D17
1N4004
332
4.75K
CR2
C17 LED3
2
100K
50V D18
1N4004
Q5
233
J1
2N4857
7
D29
"N"
1N4004
J1 75 SW.4A
10
CVS
D26 "H"
R39
224
75 J2
1N4004
10K CVI C W 20K
6
VV
V.V. MIN.
76
SW.3 TRIM
226
J1
11
77
238 OUTPUT TRIM AND
J2
8 REFERENCE CIRCUIT
"N"
T.S.3
D24 74
C29
1N4004 .047
100V
74
8
73
73
J2
R112 R142
7
D35
75.0 75.0
1N4004
14
"J"
"LOW" WITH
OUTPUT CURRENT
(FOR O.C.V. BOOST)
D25
1N4004
C9 +16V
R14
.02
47.5K
600V
DZ4
R15
10V
1.00M Q1
1W
9 600mA
40V D
X1 8
R32
10
lm224 4.75K
DZ15 J1
231
C20
9
12V
.022
1W
1.00K
50V CONTROL SIGNAL
TO FIRING BOARD
K
Q6
C W
2N4857
1.50K
100K
"K"
D30
1N4004
MAX CONTROL
VOLTS TRIM
267
100K
1.00K LED5
C25
.047
100V
68.1K
-6.2V
R12
221K
R11
267K
R7
2
2.67K
50K
1
X1
D11
D10
3
1N4004
C W 1N4004
lm224
+55V
R4 +16V
470
C
5 W
POWER SUPPLY
200
15W
J1
R1
150K
150K
D1
1N4007
DZ1
A
16V
5 W DZ3
+ C2
6.2V
47
D5
TP1
160V .4W
LED1 D2
150V 1N4007
45J
-6.2V
J1 D4
14 R113 1N4007
DZ2
301
200 10V
15W D3 5 W
1N4007
-10V
C7
1.00K
4.75K 4.75K
.047
100V
V REF.
C8
18
15.0K
15V
4
C1
C19
24.3K X2
.022
.02
50V
LM224 600V
11
D33
D27
1N4004
1N4004
47.5
C30 -10V
.047
"N"
47.5 100V
R136
J1
G-6
+16V
4
X1
LM224
11
-10V
IDEALARC DC1000