1 2 3 4 A B C D L N F1 T4A/250V MOV1 10D471 TR1 3D-12 CX1 V 5 7 2 / F U 2 2 0 . L1 H M 0 1 / 5 0 1 U U . 1 DB1 KBL606 4 3 2 C1 + 120uF/420V VCC Q4A 2N3904 Q4 2N3906 R9 ZD1 18V R12 68K/0805 3 6 4 R10 C7 5 1 2 OB2273N U1 Q1 12N65/TO-220F R3 2R/2WS R11 D7 MBR20200 C10 R13A R13B R13C R4 R5 BUCK+ B 2 R D 2 R 6 0 2 1 / K 0 0 1 6 0 2 1 / K 0 0 1 A 2 R C 2 R 6 0 2 1 / K 0 0 1 6 0 2 1 / K 0 0 1 C3 1 T1A V K 1 / 2 3 3 R19 4 9 T1C 7 6 0 2 1 / R 3 3 PQ3225 D6 FR207 R7 D5 VCC R8 T1B 5 2 C4 + 10uF/50V IC1A C6 CY1 BUCK+ 222/250V L1 ZD2 24V R15 C8 + V 5 3 / F U 0 8 6 B 1 C I 3 1 2 U2 AZ431 7 1 R R14 C11 R16 C9 + V 5 3 / F u 0 7 4 0 2 R 8 1 R V+ V- A B C D 1 2 3 A0 1 1 Sheng 4