Lincoln Electric Ranger 305D Service Manual page 114

F-60
(+) Lead
11. Reconnect all leads.
12. Perform the Case Cover replacement Procedure.
TROUBLESHOOTING & REPAIR
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TABLE F.1 – DIODE TEST TABLE
Test Instrument
AC1
AC2
AC3
DC(-)
DC(-)
DC(-)
AC1
AC2
AC3
DC(+)
DC(+)
DC(+)
RANGER 305D
(-) Lead
and Expected
DC(+) FORWARD BIAS
(Low Resistance)
DC(+) FORWARD BIAS
(Low Resistance)
DC(+) FORWARD BIAS
(Low Resistance)
AC1 FORWARD BIAS
(Low Resistance)
AC2 FORWARD BIAS
(Low Resistance)
AC3 FORWARD BIAS
(Low Resistance)
DC(-) REVERSE BIAS
(High Resistance)
DC(-) REVERSE BIAS
(High Resistance)
DC(-) REVERSE BIAS
(High Resistance)
AC1 REVERSE BIAS
(High Resistance)
AC2 REVERSE BIAS
(High Resistance)
AC3 REVERSE BIAS
(High Resistance)
Diode Bias
Test Result
F-60