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6.Turn the POWER MIG 255 ON/OFF POWER SWITCH to ON.
7.Carefully make the following voltage tests:
a.Turn the machine OFF between each test.
b.Carefully connect the meter plugs to the exposed lead connections.
c.Turn the machine ON to conduct the voltage test.
FROM | TO | EXPECTED |
LEAD | LEAD | VOLTAGE |
|
|
|
208R | 206 | 28 VAC |
209R | 206 | 28 VAC |
|
|
|
8.If any of the AC voltages tested are incorrect or missing, check the M19248 snubber PC board and associated leads and connections. See the wiring diagram.
9. Make the following voltage test:
a. Turn the machine OFF between each test.
b. Carefully connect the meter probes to the exposed lead connections.
c. Turn the machine ON to conduct the voltage test.
FROM | TO | EXPECTED |
LEAD | LEAD | VOLTAGE |
|
|
|
354 | 206 | 36 VDC |
|
|
|
10. If the DC voltage tested is incorrect or missing, and the AC voltages are cor- rect, the rectifier diode bridge may be faulty.
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