Electrical diagrams, L8930 control pc board schematic, Detect short – Lincoln Electric IDEALARC CV-300 User Manual
Page 95
G-8
IDEALARC CV-300
IDEALARC CV-300
ELECTRICAL DIAGRAMS
G-8
L8930 CONTROL PC BOARD SCHEMATIC
J3
1
4.75K
R46
600V
.02
C10
J2
6
10K
R32
500mW
5.1V
DZ4
100K
R40
D15
D6
SHT.
2518
POWER SUPPLY SOURCE POINT
G
NO.
CHK.
(UNLESS OTHERWISE SPECIFIED)
UNLESS OTHERWISE SPECIFIED)
SUP'S'D'G.
UNLESS OTHERWISE SPECIFIED)
C-
D- _
_
R-
+5.5V
J3
2
J3
4
4.75K
R45
J3
5
2-4 SWITCH
LABELS
SUPPLY
_
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
DR.
.022/50V
1/4W
DIODES =
1A, 400V
SCALE
NONE
DATE
M.J.H.
THE LINCOLN ELECTRIC CO.
CLEVELAND, OHIO U.S.A.
475
R61
100K
R73
475
R63
J10
1
J10
2
AMMETER
OUTPUT
FEEDBACK
FEEDBACK
CURRENT
AMPLIFIER
D37
LAST NO. USED
X3
1
3
2
+VS
TYPE
EQUIP.
RESISTORS = Ohms (
(
MFD
CAPACITORS =
WYE/DELTA
3 SCR/6 SCR
J3
3
10K
R49
J2
8
D28
D17
J3
7
4.75K
R37
D18
15.0K
R65
C23
D27
1.00K
R48
C20
195mA
60V
Q7
50V
0.1
C6
C22
PHASE
ZERO
MC68705R3CP
X2
4
1
X3
8
10
9
J2
7
J3
10
J2
4
RELATION
POT
CROSS
CONTROL
WINDING
G
2518
RELATION
WINDING
PHASE
+5.5V
+8.2V
J3
6
J2
5
LM224
X3
4
11
+5.5V
PILOT LED
CLOCK
10K
R72
J6
5
J6
6
J6
7
BD. COMMON
METER
BOARD
J6
8
J4
1
J6
10
C16
1.50K
R44
10K
R56
10K
R25
J4
6
J4
4
D24
J4
3
J6
9
D25
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
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
NOTES :
J6
2
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
J6
1
NUMBER.
VOLT/AMP SW.
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
+5.5V
+VS
+5.5V
+5.5V
+5.5V
+5.5V
+5.5V
+5.5V
+5.5V
30V
200mA
Q4
1W
18V
DZ6
2.21K
R16
J2
1
30.1
R77
30.1
R14
500mW
3V
DZ5
30V
200mA
Q9
5W
3300
R31
5W
3300
R7
C9
BD. POWER
DATA
COMMON
D9
J1
4
J1
2
195mA
60V
Q5
1W
27V
DZ7
30.1
R76
2.21K
R10
30.1
R18
1.00K
R17
1.00K
R15
D10
+5.5V
1.00K
R13
1W
27V
DZ9
D7
D8
30V
200mA
Q2
195mA
60V
Q3
1W
18V
DZ8
1.00K
R19
4.75K
R33
SUBJECT
+VS
MONITOR
30V
200mA
Q8
4.75K
R36
4.75K
R57
56.2K
R38
50V
0.1
C1
50V
0.1
C19
30V
200mA
Q1
D2
4.75K
R47
J3
8
D4
J3
9
1.00K
R59
D5
4.75K
R78
D3
C27
C11
C25
D1
D31
2.21K
R30
12.1K
R28
D30
D21
D20
D22
4.75K
R34
D29
D19
D35
+5.5V
22.1K
R39
D32
D34
+5.5V
+5.5V
VOLTAGE
LINE
C8
10K
R29
50V
.0047
C29
100K
R74
600V
.02
C18
+5.5V
39.2K
R52
+5.5V
X3
14
13
12
600V
.02
C17
15.0K
R82
COMMON CONNECTION
FRAME CONNECTION
475
R51
+5.5V
10K
R66
47.5K
R68
56.2K
R69
.0047
50V
C28
100K
R70
VOLTAGE NET
1.00K
R53
D26
X3
7
5
6
D38
475
R50
10K
R71
C21
EARTH GROUND CONNECTION
THERMOSTAT
AMPLIFIER
SHORT CIRCUIT
DETECT
SHORT
1.0
35V
C4
+5.5V
ANALOG
10K
R27
1.0
35V
C3
1000
35V
C2
C26
30.1
R81
1.0
35V
C12
1W
2.7
R58
MULTIPLEXING
CAPACITOR
D33
D23
OUT
IN
GND
X1
619
R6
1.00K
R26
D36
4.75K
R79
FEEDBACK
+VS
+8.2V
+5.5V
+5.5V
+8.2V
+5.5V
+5.5V
LED1
10K
R42
.1
50V
C15
2.21K
R9
10K
R43
2.21K
R12
J6
4
J4
5
J6
3
J4
2
J6
12
J6
11
.1
50V
C13
475
R8
.1
50V
C14
10K
R41
30.1
R75
D11
1W
18V
DZ2
30V
200mA
Q6
1.00K
R21
30.1
R22
2.21K
R20
2.21K
R11
J1
3
GATE 1
BRIDGE
GATE 3
GATE 2
J1
1
475
R60
22p
100V
C5
3.5795 MHz
Y1
BANK
POWER SUPPLY
SOME OR ALL OF THESE
RESISTORS MAY NOT BE PRESENT
NOTE:
CALIBRATION
POT AND
LINE
ZERO
VOLTAGE
CROSS
SUPPLIES
OF CONTROL
POWER
MONITOR
C7
D13
D14
2.00K
R3
8.25K
R1
3.92K
R2
511
R5
1.00K
R4
500mW
8.2V
DZ1
475
R80
J2
2
J2
3
1.00M
R24
+5.5V
+5.5V
+5.5V
1W
27V
DZ3
1.00K
R23
D12
+VS
+VS
6-2-92
OBS
FILE G2518.1AA
CV WELDERS
SCHEMATIC, CONTROL
6-18-93
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.