We have all had difficulty testing diodes in-circuit. Most DMM’s have a diode Vf function that measures forward drop, but what is the normal voltage drop? Analog VOM’s attempt to measure resistance of ...
1. First, check the fuse and power supply. Take a look at the power section and identify the DC (direct current) voltages. Scour the area for a transformer, a big capacitor, or a rectifier combination ...
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