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G-8
ELECTRICAL DIAGRAMS
POWER MIG 255
G-8
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DISPLAY PC BOARD SCHEMATIC - (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
TIN
G THE INTERCHANG
EAB
ILITY OF A CO
MP
LETE BOARD, THIS D
IAG
RAM
MAY
NOT SHOW THE EXACT COMPONE
NTS OR CIRCU
ITRY 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
GROUND
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
E
RW
ISE SPECIFIED
)
(UN
LE
SS O
TH
ERW
IS
E S
P
EC
IF
IED
)
10951
L
A
S
T
NO
. U
S
ED
POW
ER SUPPLY SOU
RCE POINT
1
4
UN
LESS O
TH
ER
W
ISE
S
PECIFIED
)
Ch’ge.Sht.No.
NOTES :
N
.A
. SIN
CE
COM
P
O
N
EN
TS O
R
C
IRC
UITR
Y O
N
A
PR
IN
TED C
IR
CUIT B
O
ARD
MA
Y CH
AN
G
E
NU
M
BER.
FILENAME: L10951-1AB
1/4
W
.022
/50V
1
A
, 4
0
0V
(
M
FD
CA
PACITO
RS =
R
E
SIST
O
RS
=
O
hm
s (
DATE
SCALE
THE LINCOLN ELECTRIC CO.
XA
3-12-99
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.