Display Pc Board Schematic (L10951 - Lincoln Electric POWER MIG 255 SVM144-B Service Manual

G-8
DISPLAY PC BOARD SCHEMATIC - (L10951)
J10 LATCH
4 R10
475
J10
SCK
5
J10
MOSI
6
500
R1
221
R2
221
R13
221
R3
221
R4
221
J10
515 7 R14
221
J10
500 8
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.
ELECTRICAL DIAGRAMS
500
16 a 7
BANK4
X3
15 BANK3 6
b
3 5
Vdd c
13 4
BANK2 d
9 BANK1 e 2
17 19
BANK5 h
14
12 DATA IN
Vss
11 20
CLOCK g
10 1
/ENABLE f
18 DATA OUT Rx 8
MC14489
500
13 12 1 2
X5 X5
C9
.0047
50V
500
11 10
R9 X5
475
C8 500
.0047
50V
16 a 7
BANK4
X4
500
15 BANK3 b 6
3 5
Vdd c
13 4
BANK2 d
9 8
R8 X5 9 2
BANK1 e
475 17 19
BANK5 h
C7
14
.0047 12 DATA IN
Vss
50V
10 20
/ENABLE g
500 11 1
CLOCK f
18 DATA OUT Rx 8
MC14489
+5VA
D1
3 3
Vdd Vdd
X1 C3
X3 X4
C10
0.1
IN OUT
7805 0.1
50V
MC14489 50V MC14489
C1
GND C2
4.7
18
Vss Vss
35V 14 14
15V
3 8
3 8
1
1 1
2
2 2
4
4 4
5
5 5
6
6 6
7
7 7
9 DISP3 DISP2
9 9
10
10 10
3 8
3 8
1
1
2
2
4
4
5
5
6
6
7
7
9 DISP7 DISP6
9
10
10
500
14
X5
C4 5 6
X5
0.1
HEXINV
50V
7
3 4
X5
500
3 8
DISP1
3 8
1
2
VOLTS
4
5 LED3
6
7
DISP5
9
10
G-8
POWER MIG 255