Lincoln Electric SVM148-B service manual Figure F.11 14-PIN Amphenol PIN Assignments

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F-36 F-36

TROUBLESHOOTING & REPAIR

AUXILIARY AND FIELD WINDING TEST (continued)

FIGURE F.11 – 14-PIN AMPHENOL PIN ASSIGNMENTS

	C
D	B
	L
E
	K	A
M		J
	N

FI

G

H

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To test the feeder winding:

Ranger 300 DLX Models

1.With the 5/16” and 3/8” nut drivers, remove the case left side.

2.Set the voltmeter to the AC volts position.

3.Connect the volt/ohmmeter probes to leads #31 and #32 where they connect to 15 amp circuit breaker CB1 and the 14-pin amphe- nol. See the Wiring Diagram. See Figure F.11.

NOTE: It is possible to check this voltage read- ing at the amphenol by inserting the test probes at pin A (for lead #32) and pin J (for lead #31A). See Figure F.11. However, if you use this method and get no voltage reading, it could mean there is a break or loose connec- tion in the leads between the circuit breaker and the amphenol. Check the reading again with one probe at the circuit breaker connec- tion for lead #31 and the other probe at amphe- nol pin A.

4.Start the engine and run it at high idle (3700 RPM).

5.Set the output control to the maximum position (position 10).

6.Check the AC voltage reading. It should be between 115 and 126 VAC.

7.Connect the volt/ohmmeter probes to leads #31 and #42 where they connect to 15 amp circuit breaker CB1 and the 14-pin amphenol. See the Wiring Diagram.

NOTE: It is possible to check this voltage read- ing at the amphenol by inserting the test probes at pin K (for lead #42) and pin I (for lead #31B). See Figure F.11. However, if you use this method and get no voltage reading, it could mean there is a break or loose connec- tion in the leads between the circuit breaker and the amphenol. Check the reading again with one probe at the circuit breaker connec- tion for lead #31 and the other probe at amphe- nol pin K.

8.Set the output control to the maximum position (position 10).

9.Check the AC voltage reading. It should be between 43 and 50 VAC.

If the voltage readings are within specifications, then the windings are good and functioning properly.

If any one or more of the readings are missing or not within specifications, check for loose or bro- ken wires between the test points and the stator windings. See the Wiring Diagram. Make sure that the windings are NOT grounded internally to the stator iron. If the leads are intact, then the stator may be faulty. Replace the stator.

10. Reinstall the right case side.

RANGER 300 D AND 300 DLX