Lincoln Electric IDEALARC CV-300 Service Manual page 99

G-12
5 6
X5
9 8
X5
+5V
J7
+5V IN 2
3.01K
J7
1 R25
DATA
J7
3 R26
CLOCK
C5
330p
50V
J7
COMMON 4
+5V
14 14
X1 X2
C2 C3
74HC164 74HC164
7 7
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.
IDEALARC CV-300
ELECTRICAL DIAGRAMS
M15893 METER PC BOARD SCHEMATIC
+5V
Q1
300mA
D1
30V
3.32K
C1
475
R1
D2
1N914
3
A
X1
4 Q Q
B
5 Q
C
6
Q
D
10
Q E
11 Q
F
3.01K
12
Q
G
74HC164
13 12 11 10
X5 X5
1 2 3 4
X5 X5
C6
330p
50V
14 14 14
X3
X5
C7 C8
X4
C4
74HC164 54HC74 HEXINV
7 7 7
NOTES :
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE
NUMBER.
3 8
1
2
4
5
6
7
LED1
9
10
3
+5V A +5V
X2
4 Q Q
B
A1 1 5 Q A1 1
C
2 6 2
A2 Q A2
D
8 10 8
CLK Q E CLK
9 11 Q 9
R F R
13 12 13
Q Q Q
H G H
74HC164
+5V
14
1 RESET 1 VCC
2 13
DATA 1 RESET 2
3 CLOCK 1 DATA 2 12
4 SET 1 CLOCK 2 11
5 Q1 SET 2 10
6 X4 9
/Q1 Q2
7 GND 54HC74 N.C. 8
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
CAPACITORS =
RESISTORS = Ohms (
DIODES = 1A, 400V
NOTE: ALL UNMARKED RESISTORS = 100 OHMS
4-30-93A
THE LINCOLN ELECTRIC CO.
CLEVELAND, OHIO U.S.A.
JCP
DR.
3 8
1 1
2 2
4 4
5 5
6 6
7 7
LED2
9 9
10 10
3
A +5V
X3
4
Q Q
B
5 1
Q C A1
6 Q A2 2
D
10 8
Q
E CLK
11 9
Q F R
12 Q Q 13
G H
74HC164
+5V
LAST NO. USED
R- 28
C- 8
MFD ( .022/50V UNLESS OTHERWISE SPECIFIED)
LABELS
D- 2
1/4W UNLESS OTHERWISE SPECIFIED)
(UNLESS OTHERWISE SPECIFIED)
SUPPLY VOLTAGE NET
POWER SUPPLY SOURCE POINT
COMMON CONNECTION
FRAME CONNECTION
EARTH GROUND CONNECTION
EQUIP.
CV WELDERS
TYPE
METER P.C. BOARD SCHEMATIC
SUBJECT
NONE
SCALE
SHT.
01-06-89 CHK. SUP'S'D'G.
DATE NO.
IDEALARC CV-300
G-12
3 8
LED3
M M 15892