Lincoln Electric RED-D-ARC DX450 Service Manual page 96

F-52
To test the 42 VAC wire feeder winding:
1. Connect the voltmeter probes to pins "I" (lead
41A) and "K" (lead #42A) of the 14 pin
Amphenol. See Figure F.8 . .
2. Start the engine and run it at high idle (1810
RPM).
3. The AC voltage reading should be between 40
and 50 VAC.
4. If these voltage readings are not within the
specified limits, check for a tripped or defective
circuit breakers, loose connections, or broken
wires between the test points and the stator
windings. If there are no wiring problems, and
the circuit breakers are not tripped or defec-
tive, the stator may be defective.
W4/W5
W2/W3
W1/W6
TROUBLESHOOTING AND REPAIR
STATOR VOLTAGE TESTS (continued)
FIGURE F.9 - TEST POINTS
To test the three-phase weld winding:
1. Locate weld winding leads W1/W6, W2/W3,
and W4/W5 where they connect to the three-
phase output bridge rectifier. See Figure F.9.
See Wiring Diagram.
2. Start the engine and run it at high idle (1810
RPM).
3. Check for about 60 to 65 VAC from leads
W1/W6 to W2/W3, W2/W3 to W4/W5, W4/W5
to W1/W/6.
4. If these voltage readings are not within the
specified limits, check for loose connections or
broken wires between the test points and the
stator windings. If there are no wiring prob-
lems, the stator may be defective.
* These values are maximum for a cold machine.
POSITIVE
DX450
F-52
NEGATIVE