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▶Function
Generates a required DC power of 12V or 5V in case of supplied or disconnected AC power.
▶Description
-When AC 220V is applied to CN3, D17 D20 transforms it to DC 300V.
-DC 300V is generated for the LVT1 secondary source by IC3 and PC1 turning on/off.
-The secondary 12V depends on the ZD1 value.
-The 12V for the LVT1 secondary source is transformed to DC 5V through IC4
