Lincoln Electric VANTAGE SVM178-B Service Manual page 229

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