7 ) AC220V power conversion circuit through XP2, XP3, FU, RV1 ( overvoltage protection ) , the transformer Tl by VD6, VD7 rectifier , C4, C5 filter, the output voltage of 12V . Relay power . Meanwhile , 12V voltage by 7805 , C6, C7 filter, to be +5 V DC voltage supply for the CPU .UYQservice manual download site

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