Lincoln Electric IDEALARC CV-300 - Manual (Page 97)

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G-10
IDEALARC CV-300 IDEALARC CV-300
ELECTRICAL DIAGRAMS G-10
L8873 CONTROL PC BOARD SCHEMATIC
X3 8
10
9
MONITOR
THERMOSTAT
POWER
OF CONTROL
30V
200mA
Q8
WINDING
4.75K R36
OUTPUT
FEEDBACK
CROSS
SUPPLIES
4.75K
R57
CROSS
RELATION
4.75K
R34
VOLTAGE
ZERO
LINE
ZERO
PHASE
+5.5V +8.2V
+5.5V
MC68705R3CP
X2
4
1
C22
POT AND
J2
8
+5.5V
LM224
X3
4
11
D28
1000
35V
C2
1.00K
R13
+5.5V
+VS +8.2V
+5.5V
D17
1.0
35V
C3
J3
7
CALIBRATION
NOTE:
RESISTORS MAY NOT BE PRESENT
SOME OR ALL OF THESE
POWER SUPPLY
50V
0.1
C1
50V
0.1
C19
500mW
8.2V
DZ1
C20
30V
200mA
Q1
1.00K
R48
30.1
R81
C26
D2
4.75K
R47
J3
8
D4
J3
9
1.00K
R59
D27
4.75K
R37
1W
2.7
R58
D5
475
R80
4.75K R78
D3
C27 C11 C25
D1
4.75K
R79
D36
10K
R32 500mW
5.1V
DZ4
100K
R40
50V
0.1
C6
D15
D6
1W
27V
DZ9
4.75K
R33
C9
5W
3300
R7
5W
3300
R31
D7
D8
30V
200mA
Q9
30V
200mA
Q2
195mA
60V
Q3
1W
18V
DZ8
500mW
3V
DZ5
10K
R49
D9
+VS
+VS
+VS
GATE 2
GATE 3
J1
4
1.00K
R19
2-4 SWITCH
D10
30.1
R14
30.1
R77
J2
1
J2
6
J1
2
1.00K
R15
PILOT LED
BOARD
METER
BD. COMMON
30V
200mA
Q4
600V
.02
C10
1W
18V
DZ6
195mA
60V
Q5
CLOCK
VOLT/AMP SW.
1W
27V
DZ7
LABELS
SUPPLY
39.2K
R52
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
DR. 9-13-90
.022/50V
1/4W
DIODES = 1A, 400V
SCALE
600V
.02
C17
NONE
DATE M.J.H.
C21
THE LINCOLN ELECTRIC CO.
600V
.02
C18
CLEVELAND, OHIO U.S.A.
100K
R74
R- 82
29
D-
C- UNLESS OTHERWISE SPECIFIED)
SUP'S'D'G.
UNLESS OTHERWISE SPECIFIED)
(UNLESS OTHERWISE SPECIFIED)
CHK.
TYPE
SUBJECT
EQUIP.
3 SCR/6 SCR
WYE/DELTA
CAPACITORS = MFD (
RESISTORS = Ohms (
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
NUMBER.
NOTES :
FEEDBACK
CURRENT
AMPLIFIER
AMMETER
AMPLIFIER
SHORT CIRCUIT
DETECT
SHORT
2003
LAST NO. USED
POWER SUPPLY SOURCE POINT
SCHEMATIC
G SHT.
NO.
CV CONTROL BOARD
EARTH GROUND CONNECTION
VOLTAGE NET
FRAME CONNECTION
COMMON CONNECTION
38
+5.5V
J6
4
10K
R27
J4
5
10K
R72
J6
5
D33
J6
6
J6
7
J6
8
2.21K R10
J6
3
LED1
J4
2
J6
12
J4
1
J6
10
J4
6
C16
1.50K
R44
10K
R56
10K
R25
D24
J4
4
J4
3
J6
9
D23
J6
11
D25
.1 50V
C13
475
R8
1
4
PC0 PD2
PC1
PB3
PB2
PC7
PB1
XTAL
PB0
PB7 PC5 PB4 PB5
PB6
PA0
PA1
PA2
PA3
PA4 PA5
PA6
PA7
PC3
PC2
INT
PC4
PD1
PD4 VSS VCC
VPP
TIMER
PD5 PD0 PD7
PD6
PD3
PC6
RES
EXTAL
MC68705R3CP
X2
27
34
31
11
9
6
15
21
19
12
2
40
26
38
33
22
28
10
36
37
17
29
25
39
18
24
23
13
20
5
3
14
8
30
35
16
7
32
.1 50V
C14
10K
R41
3.5795 MHz
Y1
22p
100V
C5
1.0
35V
C4
10K
R42
2.21K
R11
1.00K
R26
.1 50V
C15
619
R6
OUT IN
GND
X1
2.00K
R3
2.21K
R9
2.21K
R20
+5.5V
+VS
+5.5V
+5.5V
+5.5V
+5.5V
+5.5V
+5.5V
+5.5V
+5.5V
BD. POWER
DATA BANK
CAPACITOR
FEEDBACK
475
R60
1.00M
R24
D22 1.0
35V
C12
D34
D32
J2
3
J2
2
J6
2
J6
1
8.25K
R1
3.92K
R2
511
R5
1.00K
R4 10K
R43
2.21K
R12
2.21K
R16
COMMON
BRIDGE
22.1K
R39
D35
10K
R29
GATE 1
PHASE
D19
56.2K
R38
D29 D20
+5.5V
D21
VOLTAGE
WINDING
RELATION
D30 12.1K
R28
2.21K
R30
D31
C8
J3
6
J2
5
J2
4
C7
LINE
J3
10
+5.5V +8.2V
MULTIPLEXING
MONITOR
ANALOG
2003 G
CONTROL
POT
J2
7
D13
D14
30.1
R22
1.00K
R21
30V
200mA
Q6
1W
18V
DZ2
D11
30.1
R76
30.1
R75
J1
3
1W
27V
DZ3
1.00K
R23
D12
J1 1
195mA
60V
Q7
30.1
R18
1.00K
R17
+5.5V
+5.5V
+5.5V
+VS
D18
J3 5
4.75K R46 4.75K R45
J3 4
J3
2
D37
10K
R71
50V
.0047
C29
X3 1
3
2
D26
1.00K
R53 X3 14
13
12
475 R50
475
R51
.0047
50V
C28 56.2K
R69
100K
R70
15.0K R82
475
R61 10K
R66
47.5K
R68
100K
R73
475
R63
J10
1
J10
2
D38
J3
3
X3 7
5
6
15.0K
R65
C23
+5.5V +5.5V
+5.5V
+5.5V
+5.5V +5.5V
J3
1
9-11-92M
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.