Lincoln Electric IMT864 POWER MIG 255C - Manual (Page 50)

F-2
L12506
A.01
COLOR CODE:
ELECTRICAL SYMBOLS PER E1537
GENERAL INFORMATION
4
5
J7
9
8
7
6
265
263
260
261
U - BLUE
R - RED
W - WHITE
B - BLACK
INDICATES CONNECTOR CAVI TY NO.
262
267
264
OUTPUT CHOKE POWER FACTOR ENHANCEMENT CHOKE
204B
SECONDARY VOLTAGES
SHOWN ARE NO LOAD RMS VALUES
WIRE
DRIVE
MOTOR/
GEARBOX
1
2
3
10
C3 C1
205 206S
206B
R 1
SCR HEATSINK ASSEMBLY THERMOSTAT
116.6V
14.2V
14.2V
28.4V
C2
+ + + C1 THRU C3
31,000 MFD 50V
15 OHMS 100 W
B
+ -
320B
1
J10
J10
390 392
J1 J4 J6 J8 J9 J7
10
J2 J5
1
3
J3
CAVITY NUMBERING SEQUENCE
(COMPONENT SIDE OF P.C. BOARD)
251
206
FOR TIMER OPTION
28.4V
W
T
A
C
H
SCR HEATSINK ASSEMBLY
SCR 2
G1
G2
SCR 1
252
R3
256
8 6 5 1
254 253
R4
254A
5 5 0
5 5 1
4 2 7 3
DISPLAY
BOARD
5 1 5
5 5 2
5 0 0
POWER TRANSFORMER
G2
WIRE FEED SPEED
G2 G2
-
+
208R 209R 209R 208R 354
1
2
3
4
325
324
325
4
2
GUN TRIGGER
324
5
2
3
2
4
1
2
3
2
5
5
2
3
4
7
11
6
3
8
9
2
5
4
J8
252
550
254
500
J4
4
7
6
14
11
1
J5
J6
1
1
11
10
9
8
6
GND
X6
X5
515
206B
B
2
3
4
7
8
9
10
3
5
206
205
320
8
6
14
15
16
6
5
W
206S
207
353
X8
325B
X9
352
4
10
12
13
7
12
354
G2
204
G1
X7
390
325
555
1
J2
6
7
8
9
J1
10
1
515B
324
208
12
13
1
J3
253
251
552
551
256
209
GND
352
353
515B
555
206B
G2
X2
D1
209
X8
D2 BAFFLE MOUNTED RECTIFIER DIODE BRIDGE
208
204
X3
X4
207
X9
X5 X5
X6 X6
X7 X7
X1
X9
X8
TO WORK
G2
352
353
FAN
MOTOR
TO WORK
J3
TO WORK
207
ARC VOLTAGE
325B
OUTPUT CHOKE THERMOSTAT
320
B
R
U
J11
**
N.A. WELDING CABLE MUST BE OF PROPER CAPACI TY FOR THE
FUTURE APPLICATIONS.
NOTES:
CONDUCTOR STRAP AND WORK STUD.
OFF AND REVERSE LEAD CONNECTIONS AT CABLE
"POSITIVE". TO CHANGE POLARITY, TURN THE UNIT
CURRENT AND DUTY CYCLE OF IMMEDIATE AND
N.B. THIS DIAGRAM SHOWS THE "ELECTRODE" POLARITY
GAS
SOLENOID
CONTROL BOARD
POWER MI MIG 255C 255C (2 (230/460/575 V)
2
1
5 8
4 1
8 1
9 16
1 3
4 6
8
1
14
7 1
12 7
6
10 6
5 1
CAVITY
1
**
(NON-LEAD SIDE OF CONNECTOR)
2
3 4
NUMBERING SEQUENCE
J11
1
2
3
8
7
6
5
4
W
B
B
R
U
W
B
J12
J12
311
GAS SOLENOID
3 392
4
E
F
A
B C
D
G
76
4
2 75
3218
3214
77
SPOOL GUN/
PUSH-PULL
AMPHENOL
(VIEWED
FROM REAR)
312 312
311
77
76
75
3218
3214
4
2
209R
208R
TO GROUND PER NATIONAL ELECTRICAL
CODE
G
H2
5
4 2
1 3
TO SINGLE PHASE SUPPLY LINE
H1 H3 H4
W
B
H5
H2
L2 L1
H1
H1
H3
H4
RECONNECT PANEL
(SHOWN CONNECTED FOR 230V)
LINE SWITCH S1
L2 L1 H5
H1 H4 H1 H4 H4 H1 H4 H1
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The specific diagram for a particular code is pasted
inside the machine on one of the enclosure panels. If the diagram is illegible, write to the Service Department for a replacement. Give the equipment code number.