How do I perform a diode test?
Unbolt connection at end of flexible lead to isolate from circuit, set ohmmeter to RX100 range, place probes on heatsink and loose lead end for TEST #1. Reverse positions for TEST #2. Defective diodes show continuity in both tests or no deflection indicating open.
From the official Adendorff Mac Afric Gcharg 108 manual, page 13
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