Lincoln Electric IMT636 POWER MIG 255 - Manual (Page 48)

F-4
L11980
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 CAVITY NO.
262
267
264
OUTPUT CHOKE POWER FACTOR ENHANCEMENT CHOKE
204B
FO
R
SP
O
O
L
G
UN
O
PT
IO
N
SECONDARY VOLTAGES SHOWN ARE NO LOAD RMS VALUES
1
2
3
10
C3 C1
205 206S
206B
R1
SCR HEATSINK ASSEMBLY THERMOSTAT
116.6V
14.2V
14.2V
28.4V
C2
+ + + C1 THRU C3 31,000 MFD 50V
15 OHMS 100 W
+ -
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
J9
R.F. FILTER
SCR HEATSINK
ASBLY
SCR 2
G1
208S
204S
G2
SCR 1
209S
1
2
3
208S
208
208R
209S
204S
8
7
6
5
4
209R
209
252
WIRE FEED SPEED
R3
256
8 6 5 1
ARC VOLTAGE
252 254 253 256
R4
254A
55
0
55
1
4 2 7
WIRE FEED SPEED
3
R3
DISPLAY
BOARD
51
5
55
2
50
0
8 4 7 6 3 5 2 1
ARC VOLTAGE WIRE FEED SPEED
252 254 253 256
R4
254A
DISPLAY
BOARD
50
0
51
5
55
1
55
2
55
0
R3
POWER TRANSFORMER
SCR 1
G1
208S
G2
204S
TO GROUND PER NATIONAL ELECTRICAL CODE
SCR 2
ASBLY
SCR HEATSINK
209S
WIRE FEED SPEED
253
R4
ARC VOLTAGE
252 254 256
R3
254A
G2
SCR 1
SCR HEATSINK
ASBLY
SCR 2
204S
209S
G1
208S
SCR 2
ASBLY
SCR HEATSINK
SCR 1
G2
G1
208S
204S
209S
-
+
208R 209R
-
+
254A
R3
252 254 256
WIRE FEED SPEED
8 7 6 5 4 3 2 1
ARC VOLTAGE
DISPLAY
BOARD
253
R4
50
0
51
5
55
0
55
1
55
2
209R
+
-
208R 354
J11
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
392
2
3
4
7
8
9
10
3
5
206
205
320
326
541A
543
SCI
SCI
515
206A
8
6
14
15
16
6
325A
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
CONTROL BOARD
12
13
1
J3
253
251
552
551
256
209
GND
352
353
252
R4
254A
256 253 254
DISPLAY
BOARD
WIRE FEED SPEED
R3
8 7 6 5 4 3 1
ARC VOLTAGE
51
5
2
55
1
55
2
55
0
50
0
209R
+
354 208R
-
515B
555
206B
253
R4
254 256
254A
ARC VOLTAGE
254A
POWER TRANSFORMER
204S
208S
G1
SCR HEATSINK
ASBLY
SCR 2
G2
209S
SNUBBER
BOARD
X2 ASBLY
SCR HEATSINK
D1
R.F. FILTER
209S
X8
D2 BAFFLE MOUNTED RECTIFIER DIODE BRIDGE
354
+
G1
208S
204S
SCR 2 X3
X4
POWER TRANSFORMER
G
207
X9
X5 X5
X6 X6
X7 X7
X1
X9
X8
208R
-
209R
TO WORK
SCR 1
G2
352
353
FAN
MOTOR
TO WORK
J3
252 254 253 256
TO WORK
207
R.F. FILTER
50
0
51
5
55
0
55
1
ARC VOLTAGE
252 254 253 256
R3 R4
DISPLAY
BOARD
254A
55
2
WIRE FEED SPEED
8 7 6 5 4 3 2 1
254A
252 254 253 256
R3 R4
ARC VOLTAGE WIRE FEED SPEED
325B
OUTPUT CHOKE THERMOSTAT
320
J11
**
N.A. WELDING CABLE MUST BE OF PROPER CAPACITY 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
PO POWER WER MIG MIG 25 255 (230/460/575V CODE 10986 AND ABOVE) 5 (230/460/575V CODE 10986 AND ABOVE)
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
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
WIRE
DRIVE MOTOR/
GEARBOX
B W
T
A
C
H B
R
U
B
R
U
W
B
J12
J12
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..