Wannien 101v0 Power Supply Schematic Exclusive ✪

A drop in the DC bus voltage is a telltale sign that the main input capacitor (the large 120 µF, 450 V electrolytic) is out of specification. If a new capacitor of the same value restores the DC voltage to around 280 V (in a 220 V AC system), the original capacitor should be replaced. A weak capacitor may cause intermittent startup or low output voltage.

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), varistors for surge protection, and X/Y capacitors to filter electromagnetic interference. Rectification: A drop in the DC bus voltage is