Lincoln Electric VANTAGE SVM178-B - Manuel (Page 229)

OUTPUT RECTIFIER BRIDGE TEST(CONTINUED)
TROUBLESHOOTING AND REPAIR F-41 F-41
VANTAGE® 500
TABLE F.2 – DIODE TEST TABLE
AC1 DC(+)
Forward Bias
(Low Resistance)
AC2 DC(+)
Forward Bias
(Low Resistance)
AC3 DC(+)
Forward Bias
(Low Resistance)
DC(-) AC1
Forward Bias
(Low Resistance)
DC(-) AC2
Forward Bias
(Low Resistance)
DC(-) AC3
Forward Bias
(Low Resistance)
AC1 DC(-)
ReverseBias
(High Resistance)
AC2 DC(-)
ReverseBias
(High Resistance)
AC3 DC(-)
ReverseBias
(High Resistance)
DC(+) AC1
ReverseBias
(High Resistance)
DC(+) AC2
ReverseBias
(High Resistance)
DC(+) AC3
ReverseBias
(High Resistance)
DIODE TEST
RECTIFIER
TERMINAL
CONNECTIONS
TEST INSTRUMENT
(+) Lead (-) Lead
DIODE BIAS
& EXPECTED
TEST RESULT
18. Reconnect all leads.
19. Perform the Case Cover Replacement Procedure.
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