Lincoln Electric RANGER 250 SVM150-A Service Manual page 87

F-37
OUTPUT RECTIFIER BRIDGE TEST (continued)
FIGURE F.15 – PLUG J41 AND RESISTOR R3 LOCATIONS
C1
CONTROL CIRCUIT
INPUT POWER
11 1J42 toPIN 3 of P50
105A 2J42 to3J13
5L 4J42 to GND. SCREW
115A 5J42 to 1J13
12 6J42 to PIN 1 of P50
101A 7J42 to 2J13
116A 9J42 to 4J13
118A 10J42 to 5J13
TEST PROCEDURE
1. Turn the engine off.
2. Perform the Case Cover Removal proce-
dure.
3. Perform the Power Module Capacitor
Discharge procedure.
TROUBLESHOOTING & REPAIR
RESISTOR R3
(0N BLOWER
SIDE OF
BAFFLER)
C2
13 1J41 to POS TERMINAL ON C2 - 85V SUPPLY
14 2J41 to NEG TERMINAL ON C2 - 85V SUPPLY
CHOPPER POWER SUPPLY, 20V
WELD BOARD POWER SUPPLY, +5V TO CIRCUIT GROUND WELD BOARD POWER SUPPLY, +5V TO CIRCUIT GROUND WELD BOARD POWER SUPPLY, +5V TO CIRCUIT GROUND WELD BOARD POWER SUPPLY, +5V TO CIRCUIT GROUND
FRAME GROUND
WELD BOARD POWER SUPPLY, +15V TO CIRCUIT GROUND
CHOPPER POWER SUPPLY, 20V
CIRCUIT GROUND
WELD BOARD POWER SUPPLY, -15V TO CIRCUIT GROUND
WELD BOARD POWER SUPPLY, +15V TO CASE GROUND
BLOWER BAFFLE - SIDE OPPOSITE BLOWER
RANGER 250
PCB5
BY-PASS
PCB2
PC BOARD
ANALOG POWER
1
PC BOARD
J41
1
J42
4. Disconnect plug J41 (with leads #13 and
#14) from the Analog Power PC board. See
Figure F.15.
5. If your machine has resistor R3, with the
11/32" nut driver, disconnect one end of
resistor R3, either lead #252 or #253. See
Figure F.15.
J60
1
3 1
J61
1
4 2
J62
J41
1
GND K
6 1
2
7
3
GND L 8
4
9
10 5
J42
F-37