Lincoln Electric RANGER 250 SVM150-A Service Manual page 123

G-5
SCHEMATIC - COMPLETE MACHINE
SHUNT
POSITIVE
50MV=400 AMPS
OUTPUT
TERMINAL
206S 204S
206B 206A
BY-PASS
PC BOARD
21
208
208A
NEGATIVE
OUTPUT
TERMINAL
ARC VOLTAGE FEEDBACK
OUTPUT
CONTROL 10K
REMOTE
CONTROL 10K
ARC
CONTROL 10K
TOROID-
SENSES WELD
CURRENT AND
AC POWER TO
ACTIVATE IDLER
IDLER COIL - PULLS TO
15
LOW IDLE
210C
12 - 14 V
CURRENT LEVEL FEED BACK
IGBT MODULE - EMMITTER
SIGNAL TO WELD CONTROL
IS COMMON TO HEATSINK
PC BOARD D4
L1 CHOKE
E C
CURRENT LEVEL
GATE SIGNAL
FEED BACK SIGNAL
11
D2 DIODE CHOPPER
20V DC
PC BOARD
WIREFEEDER MODULE 12
25 23
VOLTMETER
POLARITY PWM SIGNAL FROM
SWITCH WELD CONTROL
PC BOARD
25 23
204S
206S 105A
208B 115A
WELD CONTROL
101A
PC BOARD
10 V 116A
77
118A
0-10 V
R1 76
250
0 V
251
75
10 V
77A
2
-15 V (W/O POT.)
4
76A
0 V
75A 214
218
279
220
R2 278
222
277
260A
210D
261A
232
233
0 - .1V WHEN ON
215
230
231
5F
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
ELECTRICAL DIAGRAMS
D1 - THREE PHASE BRIDGE RECTIFIER
C1
C2
250 OHMS
2400uf 2400uf
25 W
100vdc 100vdc
R3
W3
11
12
5V
105A
ANALOG
15V
115A
POWER PC
COM
101A
BOARD
15V
116A
15V TO GND.
118A
0 V
IDLER SWITCH
5L
13 14
15 V
15 V
WELD TERMINALS
SWITCH
0 V
CV
PIPE
MODE
CC
SWITCH
TIG
80V DC BUS VOLTAGE
25A BATERY
THERMOSTAT ON
CIRCUIT BREAKER
CHOPPER MODULE
212
NORMALLY CLOSED
RUN-STOP SWITCH
THERMAL
BATTERY
SHOWN IN RUN POS.
SHUTDOWN
CHARGING
DISPLAY
221
MODULE
KOHLER
IGNITION
MODULE
START BUTTON
SWITCH
210
ENGINE OIL PRESSURE SWITCH
OPENS ON LOW OIL PRESSURE
224
HOUR METER
ONAN
+
IGNITION
MODULE
ENHANCED
WIRING DIAGRAM
W1
W2
TWO POLE 3600 RPM ALTERNATOR
3
120 V AC
SLIP RINGS
AC
200
5
POWER 240 V AC
50 V DC
200A
GND E
120 V AC
C3
6
800uf
41
150vdc
42 VOLT AC
201
WIRE FEEDER
ROTOR FIELD
5H
POWER
42
42 VOLT AC
POWER FOR
ROTOR FIELD CIRCUIT
7
9
BATERY CHARGER
TROUBLE LIGHT
210D
209
229
DISPLAY
+
BATTERY
12 VOLT 228
PC BOARD
BATTERY
FRAME
GROUND
210B
211 225
ENGINE
ENGINE DIODES
STARTER
SOLENOID
KOHLER FUEL
ENGINE
SHUTOFF
STARTER
SOLENOID
G-5
13
14
+
D3
200
ROTOR
FLASHING
5K
224B
C
L11480
RANGER 250