Lincoln Electric POWER WAVE 355/405 SVM159-A Service Manual page 74

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OUTPUT DIODE MODULES TEST (continued)
NEGATIVE
OUTPUT
TERMINAL
TEST PROCEDURE
1. Remove input power to the POWER WAVE
355/405.
2. Locate the output terminals on the front
panel of the machine. See Figure F.7.
3. Remove any output cables and load from the
output terminals.
TROUBLESHOOTING & REPAIR
FIGURE F.7 Machine Output Terminals
STATUS ST TUS
_
POWER WAVE 355/405
THERMAL THERMAL
+
POSITIVE
OUTPUT
TERMINAL
4. Using the analog ohmmeter test for more
than 200 ohms resistance between positive
and negative output terminals. Positive test
lead to the positive terminal; Negative test
lead to the negative terminal. See Figure
F.8.
NOTE: The polarity of the test leads is most
important. If the test leads polarity is not cor-
rect, the test will have erroneous results.
F-32