Lincoln Electric POWER WAVE SVM156-A Service Manual page 62

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6. Use the analog ohmmeter to perform the
tests detailed in Table F.2.
7. If the input rectifier does not meet the
acceptable readings outlined in the table,
the component may be faulty. Replace.
NOTE: Before replacing the input rectifier, per-
form the Switch Board Test and the
Input Contactor Test.
8. When installing a new input rectifier, see
Input
Replacement procedure.
TABLE F.2 – INPUT RECTIFIER TEST POINTS AND ACCEPTABLE READINGS
+ Probe
A
B
C
A
B
C
NEG
NEG
NEG
POS
POS
POS
TROUBLESHOOTING & REPAIR
INPUT RECTIFIER TEST (CONTINUED)
Rectifier Removal
TEST POINT TERMINALS
POWER WAVE 455/R
9. If the input rectifier is good, be sure to
reconnect the positive and negative leads
to the correct terminals and torque to 31
in.-lbs. See the Wiring Diagram.
10. Replace any RTV sealant previously
removed.
11. Install the case top.
and
- Probe Acceptable Meter Readings
NEG
NEG
NEG
POS
POS
POS
A
B
C
A
B
C
ANALOG METER X100
RANGE
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Approx. 500 ohms
Approx. 500 ohms
Approx. 500 ohms
Approx. 500 ohms
Approx. 500 ohms
Approx. 500 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
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