Lincoln Electric 11141 Service Manual page 80

F-34
OUTPUT RECTIFIER MODULES TEST (continued)
NEGATIVE
OUTPUT
TERMINAL
TEST PROCEDURE
1. Remove input power to the POWER WAVE
355M/405M.
2. Locate the output terminals on the front panel
of the machine. See Figure F.8.
3. Remove any output cables and load from the
output terminals.
TROUBLESHOOTING AND REPAIR
FIGURE F.8 – Machine Output Terminals
STA A TUS ST TUS
_
POWER WAVE
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.9.
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.
® 355M/405M
F-34