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ELECTRICAL DIAGRAMS
G-9
POWER MIG 255C
SCHEMATIC - DISPLAY PC BOARD (L10951)
500
475
R10
DISP2
2
1
4
9
5
10
7
6
83
LED3
X5
1213
J10
4
DISP3
2
1
4
9
5
10
7
6
83
14
3
Rx
Vdd
d
BANK1
g
DATA OUT
f
CLOCK
MC14489
DATA IN
h
Vss
BANK3
BANK4
BANK2
a
/ENABLE
e
c
BANK5
b
X3
18
9
17
6
5
2
10
19
8
1
13
12
16
20
11
15
4
7
1.50K
R11
J10
6
X5
2
1
500
500
LATCH
WITHOU
T AFFEC
TING THE INTERCH
ANGEABILITY OF A COM
PLETE BO
ARD, THIS DIAG
RAM M
AY
NOT SHOW THE EXACT COMPONE
NTS OR CIRCUITRY O
F CONTROLS HAVING A COMMON CODE
LABELS
C
-
SUPPLY
R
-
LED- 3
DISP1
2
1
4
9
5
10
7
6
83
D
-
SCHEMATIC, DISPLAY PCB
1
0
1
POWERMIG 255
EARTH GROU
ND CONNECTION
SUBJECT
EQUIP.
NONE
CLEVELAND, OHIO U.S.A.
2/20/98
CHK.
D
IS
P
- 7
7805
L
515
500
J10
8
221
R14
221
R4
221
R1
221
R2
221
R13
D1
18
15V
C2
GND
IN
OUT
X1
221
R3
4.7
35V
C1
MC14489
Vss
Vdd
X3
3
14
HEXINV
X5
14
7
50V
0.1
C4
50V
0.1
C3
MC14489
Vss
Vdd
X4
3
14
X5
43
1.50K
R12
X5
65
50V
0.1
C10
500
500
500
+5VA
10951
J10
7
VOLTS
J10
5
10K
R7
50V
.0047
C8
X5
10
11
475
R8
50V
.0047
C7
X5
89
10K
R6
10K
R5
475
R9
DISP7
2
1
4
9
5
10
7
6
83
DISP6
2
1
4
9
5
10
7
6
83
500
500
500
14
3
Rx
Vdd
d
BANK1
g
DATA OUT
f
/ENABLE
MC14489
DATA IN
h
Vss
BANK3
BANK4
BANK2
a
CLOCK
e
c
BANK5
b
X4
18
9
17
6
5
2
11
19
8
1
13
12
16
20
10
15
4
7
SCK
MOSI
DISP5
2
1
4
9
5
10
7
6
83
DIO
D
ES
=
GENERAL INFORMATION
ELECTRICAL SYMB
OLS PER E1537
X
- 5
50V
.0047
C9
L
NO.
TYPE
SHT.
SUP’S’D’G.
DR.
GT
VOLTAGE NET
FRAME CONNECTION
COMMON CONNECTION
U
NLESS O
TH
ER
WISE SPECIFIED
)
(U
N
LE
SS
O
TH
ER
W
ISE
S
PE
CIFIED)
10951
L
A
S
T N
O
. U
S
ED
POW
ER SUPPLY SOU
RCE POINT
1
4
U
N
LESS OTH
ERW
ISE S
PEC
IFIED
)
Ch’ge.Sht.No.
NOTES :
N
.A
. SIN
CE
C
OM
PO
NEN
TS OR
C
IRC
UITRY O
N A
PRIN
TED
C
IR
CUIT
BOA
RD MA
Y C
H
AN
G
E
NU
MB
ER
.
FILENAME: L10951-1AB
1/4W
.0
22
/50
V
1
A
, 4
0
0V
(
M
FD
CA
PACITO
RS =
R
ESISTO
RS
= O
hm
s (
DATE
SCALE
THE LINCOLN ELECTRIC CO.
XA
3-12-99
G-9
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
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