8 8520new-M 2001.4.1 1 2 3 4 A B C D 1 2 3 4 D C B A Title Size Number Revision A 4 Date: 10-Feb-2003 Sheet of File: H:\新建文件夹\job\8520new-.DDB Drawn By: DVCC C9 220uF C37 103 T4 9014 DVCC C11 4.7uF 8 7 6 5 1 2 3 4 U 6 2402 C43 1uf R40 47 RP1 1k R37 2.2k R35 22k R17 10K R12 10K C12 1UF R13 10K C8 C7 220u D 7 4.V 100uF R2 1K R1 1K MICSKT MIC L4 47uH R32 47K C14 47uF R15 470 D 5 4.7V T8 8050 C22 203 R34 10K C42 1uF R33 18kK R31 3.3K C40 1uF C39 103(M) R30 24K R29 12K R28 220 C38 222(M) VR1 50KVR D 3 1N4148 D 2 1N4148 SPK 1 61 51 41 31 21 11 0 9 1 2 3 4 5 6 7 8 U 4 TA7738 C36 104 C35 561 C34 561 C33 22uF C32 470uF C31 220uF C30 470uF C29 100uF C28 100uF C27 47uF C26 4.7uF C25 1uF C24 47uF C23 1uF R27 6.8K R24 680 R23 330K R22 4.7K R21 27K R19 330K K C K A K D SPKSKT BAT 6V HEAD POWSKT K B R18 18K C21 153 C20 2n2(M) C19 104 C18 220uF C17 104 C16 1000uF R42 68 C41 104 R36 3.3K C13 47uF C15 104 R8 1.2K C6 202 T5 9014 R45 10K C2 1uF VCC R39 10K R3 22K T1 8050 T2 9014 VDD R46 51K DVC S3 C3 104 D C R26 10K 2 1 1 3 U1A 4066 1 1 1 0 12 U1B 4066 4 3 U1C 5 4066 8 9 6 U1D 4066 2001.4.1 REC 8520new-M T3 8050 R7 24(0.5W) R6 1K BATT￾R5 10K D 1 1N4001 MIC DAO ADIN MIC H/L T6 9014 MOT N C CHK VDD GND RESET DVC HIFI DGND ADIN MOT DAOUT MIC VR3 10K D11 4148 DVCC CHANG RESET R4 10K C4 1UF D C R41 4.7 R20 430 C5 1UF R43 1K D 9 5.1V VCC 1 2 3 4 5 6 7 8 9 10 11 12 CON1