Kenwood-DMCK3-md-sm 电路图 维修手册.pdf

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1、SPECIFICATIONS PORTABLE MD PLAYER DMC-K3 SERVICE MANUAL 1999-1/B51-5503-00 (K/K) 2837 In compliance with Federal Regulations, following are reproduc- tions of labels on, or inside the product relating to laser product safety. KENWOOD-Corp. certifies this equipment conforms to DHHS Regulations No. 21

2、 CFR 1040. 10, Chapter 1, Subchapter J. DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM. System . Mini disc digital audio system Read method . Noncontact optical reading system (semicon- ductor laser) Sampling frequency . 44.1 kHz Audio compression . ATRAC (A

3、daptive Transform Acoustic Coding) Number of channels . 2 channels Frequency response . 20 Hz to 20,000 Hz ( 3 dB) Wow 4 figures) 2) Display shows setting value+80h. Press the PLAY/PAUSE key to stop Automatic Adjustment. Remote cont*80 10changed value TEST 1the play/pause key is pressed Unito1change

4、d value oothe play/pause key is pressed 2-2 TEST MODE II (AUDIO SPEC) * Item of audio specification(use test disc TDYS1) 1) Reference TNO 2: 1kHz sinewave,0dB,L &R, Emphasis off 0Port voltage V SET 6KEYPIN 56 KEY0 67 67 4 4 0.4 Key function Port voltage V Key function Port voltage V REMOCON 8KEY PIN

5、 57 KEY1 Key function Port voltage V Key function Port voltage V Key functionNon remocon 0.81.2 00.210.460.731.02 1.622.42.8 VOL.DOWNVOL.UPKEY OFF VOL.UP 11.61.92.23 VOL.DOWNMODEHOLDExist remocon 2.572.8 CIRCUIT DESCRIPTION DMC-K3 8 2) Frequency Response TON 3: 40Hz sinewave,0dB,L&R,Emphasis off 3)

6、Modulation Noise TON 6: 20kHz sinewave,0dB,L&R,Emphasis off 4) Noise Ratio TON 7: 40Hz Infinity Zero,- dB,L&R,Emphasis off 5) Channel Separation TON 8: 1kHz sinewave,0dB,L,Emphasis off 6) Channel Separation TON 10: 1kHz sinewave,0dB,R,Emphasis off 7) Deemphasis TON 13: 16kHz sinewave,-9.04dB,L&R,Emp

7、hasis on 2-2-1 Procedures 1) Connect #23(P_TEST0) of IC5 to 2.8V(VDD) and #24(P_TEST1) of that to GND. Next Connect AC adapter to the unit.(the unit will be in CPLAY mode after TOC reads) Remocon TEST 4 Unito4 2) The unit will be in CPLAY after TOC reading. Remocon TOC OK Unito4 3) Choose and playba

8、ck TNO-02 on the disc by PLAY/PAUSE key Remocon 02playback TNO Unito4 4) Choose and playback every TNO in the above table by PLAY/PAUSE key. TNO will be chosen TNO 02 if repressing the PLAY/PAUSE key after STOP key pressed, Remocon 03playback TNO Unito4 ACEGIBDFHJ 2 1 3 5 7 4 6 Refer to the schemati

9、c diagram for the value of resistors and capacitors. PC BOARD(Component side view)PC BOARD(Foil side view) 910 S2 IC7 IC5 IC8 IC12 IC10 Q14 Q6 D5 D1 Q13 IC13 D10 Q9 S8 S7 S4 S5 S6 S3 CN2 STOP VOLUME VOLUME PLAY CN1 ED1 IC9 C36 R52 C32 L6 R30 R49 R31R62 C66 C25 C30 L5 C67 C47 C57 C7 X2 X1 C53 C34 C41

10、 C23 C56 R48 R55 C29 C54 C31 R54 R53 R1 L4 C37 C35 R65 C65 C50 R46 R41 R43 C39 C40 R42 R40 C27 R67 R27 R108 R109 R45 R15 C111 C110 R58 R47 R63 C24 R100 R101 R111 R110 C38 C12 R72 R38 R21 R29 R36 R28 C62 C21 C20C19 C9 R17 R66 R24 R25 R26 R35 R34 C43 C44 C15 C14 C11 L2 C63 C33 C52 C42 C45 C49 C26 C5 C

11、46 R13 C64 C59 C58 C61 R39 C16 R51 C28 C51 51 34 1 8 1 8 54 2140 8061 60 41 1 20 76100 50 26 25 1 75 51 112 13 24 37 48 36 25 1 22 1 10 20 111 20 21 40 41 60 61 80 20 1 TE FE RF FCONT MNT1 2 3 VDD TEST0 TEST1 DO DI SK CS CHGOK BATT F VC EB EB EB EB L3 L1 R71 R57 R44 R73 C115 C8 R37 R9 C55 R8 R74 C1

12、R11 R19 R10 C102 C103 C106 C112 R50 R103 R112 R113 C114 R106 C109 R6 C108 C48 R107 C113 C101 C60 C119 C116 C105 R105 C104 R104 R102 R59 R32 R33 C22 C17 C18 R14 R22 R70 C68 C3 C4 C6 R12 R23 R20 R18 R16 R7 R2 C10 C2 R56 R5 R69 R4 R64 R3 R60 C13 C100 D G DG EB BE BE EB EB EB EB EB EB EB 8 1 169 S G I O

13、 S E B C B E C 54 31 13 4 5 V C W C U Y W U SP SL 18 17 19 16 14 12 15 10 11 9 8 5 13 6 7 3 4 2 1 COM ADP S3 VDD TEST0 TEST1 RESET FOK FGIN SL+ ABCD SL- S1 S2 I C F ILCC FCS- TRK+ TRK- FCS+ A J E VC RF0 B D VCC PD VEE ADIN CHG 1 3 4 2 IC6 Q15 D12 Q1 Q2 Q12 D8 Q17 D6 Q16 D11 D4 Q10 D7 Q3 D2 IC1 IC2 Q

14、4 IC4 Q5 IC3 Q7 D3 D9 Q11 Q8 S1 J1 PHONES DC IN (J70-1290-02) X33-1180-00 OPEN J2 IC5 D10 Q13 Q14 S2 CN1 IC13 IC8 IC12 Q9 IC9 Q6 IC7 IC10 PLAY STOP ED1 VOLUME S4 S7 VOLUME S8S5 S3 S6 D1 D5 CN2 C27 X2 R29 R36 BE80 C40 VC R42 C38 B E B E R40 C39 R43 R46 R41 C51 F 22 C41 1 51 50 C67 C49 20 R62 1 34 R31

15、 R49 C59 41 C64C58 15 R30 40 C32 10 26 C26 11 25 C15 C14 C11 L5 60 C45 L6 R28 C62 61 C65 R67 C36 24 R27 R1 12 C50 13 25 C37 R48 TE C56 C23 C30 C34 C33 48 C52 37 C53 1 R52 C57 R53 R54 C28 R55 R51 C110 R66 FE R65 RF C29 36 C35 C54 C31 76 75 R111 R110 E B L4 R17 R13 R34 R35 R100 C111 FCONT R101 R45 C25

16、 C24 R47 3 1 2 MNT1 100 R72 C12 C61 R63 1 R58 X1 20 R21 C5 20 VDD R15 R38 TEST1 21 TEST0 61 C63 20 21 C42 C43 C44 C7 C21 80 C66 1 C9 L2 BATT 60 CHGOK C20 41 C19 1 40 4 SK DI DO CS 8 5 C47 R24 R26 R25 R109 R108 R39 C16 C46 1 8 1 E C60 R102 C4C55 10 B FCS+ TRK- VCC D F ILCC FCS- TRK+ A E C VC I J PD V

17、EE SL- S1 S2 ABCD R73 B E R103 C102 C103 C106 R112 ADIN RF0 R44 R107 G D S R106 R9 C101 C104 1 C116 C114 R113 8 C113 C115 C100 916 R105 C119 C105 R104 C112 R50 FOK FGIN R37 C68 E R3 SL+ B 2 4 3 1 4 5 S3 TEST1 R64 RESET TEST016 5 13 6 C2 R5 R11 R6 I 13 R4 R56 1 B E O D G S B E EB G B R2 5 C10 B VDD R

18、74 R69 3 B E 15 12 14 19 17 18 B C E C1 4 E R7 E B R18 R23 R12 R16 R20 R14 R70 C18 C17 C22 R59 CHG R10 R19 9 R33 R22 R32 C8 COM ADP 1 7 8 2 3 11 4 W R60 C48 E B C13 C108 C109 L3 C3 L1 R8 C6 C BE R71 R57 SP U W SL U C Y C V Q3 D8 Q17 S1 OPEN Q15 IC6 D6 Q7 IC4 IC1 IC3 Q5 Q4 Q12 IC2 Q11 D9 Q2 D7 D4 Q16

19、 D12 X33-1180-00 (J70-1290-02) J1 PHONES J2 Q1 D3D2 Q10 D11 Q8 DC IN ABDFHJCEGI 2 1 3 5 7 4 6 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10 DQ1 DQ2 WE RAS A9 A0 A1 A2 A3 VCC 20 19 18 17 16 15 14 13 12 11 GND DQ4 DQ3 CAS OE A8 A7 A6 A5 A4 3 4 NC VSS 2 1 VDD OUT 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65

20、64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 PW2VM PW2OUT N.C PWPG N.C PW1OUT N.C PW1VM N.C SLPG2 SLWOUT SLVM2 N.C SLVOUT N.C SLPG1 SLUOUT N.C SLVM1 SLCOM BEMFW B

21、EMFV BEMFU S3 S2 S1 STHB STALL VG C2M C2P C1M C1P EXTCLK IN2R IN2F IN1R IN1F VCC2 VCC1 SPCOM SPWIN SPVIN SPUIN H2PG2 N.C H2ROUT N.C H2VM N.C H2FOUT N.C H2PG1 H1PG2 N.C H1ROUT N.C H1VM H1FOUT H1PG1 SGGND ASGND PWIN1 PWIN2 FG BRK- BRK+ CSL2 CSL1 CST SPPG2 SPWOUT SPVM2 N.C SPVOUT N.C SPPG1 N.C SPUOUT S

22、PVM1 30 29 28 27 26 25 24 23 22 21 21 22 18 20 SP CHG1 S3 19 S2 S1 17 16 BEMFU BEMFV 15 14 TEST0 CHG2 SEG19 TEST1 SEG16 SEG17 SEG18 SEG14 SEG15 VSS BEMFW LCD DATA 13 12 X1 11 10 X1 16MHz X2 9 VDD RESET 8 SWDT 3 5 B.B BEEP 7 6 LDON XSTBY 4 XRST XLAT 2 1 80 75 SCLK W. UP SENS SRDT 78 79 76 77 HOLD XIN

23、T SQSY LID SW 72 73 74 80 R45 78 79 10K 76 73 74 86 88 62 94 COMMAND I-F CPU 3T DETECTOR OP AMP USER 17 C50 0.01 2.2Kx4 R46 C51 0.01 82 R42 4.3 C39 22u4 C38 1000P + 14 13 16 15 GND 12 11 10 AMP TEMP APC 9 8 7 6 FE AMP I-V AMP VC 4 5 3 2 AMP ABCD 1 RF AMP 47 48 45 46 0.022 C53 C33 0.1 100P 470K 54 SE

24、QUENCER ANALOG MUX CONVERTER 76 78 81 80 79 78 77 82 81 80 C54 0.1 75 74 AUTO A/D 73 72 AVSS 71 70 AVDD + 80 81 R27 13K R1 13K C23 22u4 19 18 21 20 VREF F0CNT XSTBY 24 23 22 R44 56K VCC 3TADJ EQADJ TE/SE AMP WBLADJ 25 26 27 28 0.1 4700P C37 66 65 64 63 62 68 69 67 66 65 64 63 62 C29 4700P R52 33K R5

25、3 1M PLL 61 60 59 56 58 57 AVSS 55 DECODER EFM/ACIRC 8 GENERATOR 93 83 82 85 84 83 87 86 85 89 61 90 89 88 92 91 DVDD 99 93 96 95 94 98 97 100 TEST3 TEST2 TEST1 DVSS 1 SERVO PWM DSP DECODER ADIP CONTROL MONITOR SERVO SPINDLE BLOCK 2 3 4 5 BLOCK 6 I/F CPU 7 100Kx4 R58 76 8073 1 79 TST2 PROCESSOR SUBC

26、ODE 9 10 11 S 12 13 DAVDD 14 15 LPF OSC CELL 16 17 DAC DAVSS 18 19 TST1 20 21 2 78 74 C24 0.01 R63 27 X2 22.579MHz R47 330 MUX ADIP AMP 29 30 31 32 BOTTOM DETECTOR PEAK, 35 33 34 36 C36 1 C35 66 64 65 63 EQ AGC, COMP USER 42 43 44 40 41 37 38 39 0.01 C52 C34 0.22 62 C27 0.47 C28 R54 100K R55 53 AVDD

27、 52 51 COMP 4 50 47 48 49 44 45 46 47 48 49 44 45 46 MEMORY CONTROLLER SHOCK RESISTANT 12 24 DIGITAL AUDIO I/F 22 NC 23 ATRAC DVDD 25 41 42 43 38 39 40 35 36 37 32 33 34 41 42 43 38 36 35 37 32 34 29 30 31 27 28 26 29 31 30 + C26 22u4 X33-1180-00 UNIT No. DESTINATION JAPAN COUNTRY J ABB. YES NO R29

28、9 17 I J C F VEE 21 22 20 19 18 LDGND VCC VC B D A E NC 13 16 15 14 12 11 10 VR FCS- TRK+ TRK- FCS+ PD-K ILCC NC PD 8 7 6 5 4 3 2 1 WU V COM COM V UW 39 36 31 27 1 2 9 8 1 2 8 9 3 3 680 R41 0.022 C40 470K R40 R48 100Kx2 6800P + C25 47u4 94 93 95 90 R19 100K R10 150K C42 0.033 C43 0.033 C44 0.22 15 1

29、2 19 2200P 15K R59 C22 C18 C17 2200P 2200P 16 17 13 18 14 15 C11 0.1 C14 0.1 C15 0.1 C49 0.1 88 89 85 86 70 67 64 61 47u4 + L5 22uH C67 47 49 48 46 42 45 41 44 38 43 37 32 36 31 35 30 34 29 33K R3 10K R4 330 R5 10u10 + 4 5 1 2 3 VO VDD GND EXT CE 3 4 5 6 C12 0.01 R64 10K 2.7K R38 17 18 13 16 15 14 1

30、00Kx2 R15 S19 S18 S17 S16 S15 S14 2 1 C61 470K R72 1K R13 67 70 61 64 15 19 12 21 22u4 C41 + 83 L4 22uH 10K R17 0.033 C65 79 100K R43 3 78 73 74 0.033 C57 10K R51 0.1 C31 0.22 C30 73 74 79 90 95 4 L2 + 47u4 C63 2 21 100Kx2 R9 13K R21 20 2 B +B Q9 20 R28 + 22u4 0.1 C45 C68 150K R11 4 12 27 36 31 39 +

31、B +B+B+B +B +B+B+B +2.8V +2.8V+2.8V +2.8V +2.8V +2.8V +2.8V+2.8V +2.8V +2.8V+2.8V +2.8V+2.8V +2.8V +2.5V+2.5V +2.5V+2.5V+2.5V +2.5V+2.5V +2.5V +2.5V +2.5V+2.5V +2.5V +2.5V+2.5V +2.5V+2.5V +2.5V +2.5V +2.5V +2.5V +2.5V +2.5V+2.5V +2.5V+2.5V+2.5V +2.5V+2.5V +2.5V +2.5V+2.5V+2.5V+2.5V +2.5V +2.5V +2.5V

32、 +2.5V +2.5V +2.5V +2.8V +2.5V C32 1 +2.8V +2.5V +2.8V VC VCC GND C56 NC 22uH C5 100u4 + X33-1182-71 X33-1180-00 UNIT No. U.K. JAPAN COUNTRY EUROPEE T ABB. J DESTINATION R29R28 NOYES YES NO X33-1182-71 UNIT No. U.K. U.S.A. COUNTRY EUROPEE T ABB. K DESTINATION R29R28 NOYES SPCOM SPW SPU SPV SLU SLCOM

33、 SLW SLV IC4 u-COM MOTOR SLED MOTOR SPINDLE APC Q14 CN1 B A JI C E D F CN2 Q5 Q7 S1 Q9 LID SW Q13 D10 D8 IC5 WAKE UP FOCUS COIL TRACKING COIL SERVO RF AMP APC ON/OFF P.U. VCC SHOCK PROOF 4M DRAM GND LINE SIGNAL LINE B LINE B LINE DAC DSP DRIVER MOTOR 2.5V AVR ON/OFF 2.5V REGULA- TOR IC RESET DIGITAL

34、 ANALOG(R) ANALOG(L) IC1: XC6365B103MR IC2: XC6383B281MR IC3: XC62EP2502MR IC4: S-80823ALNP IC5: UPD784036GC831 IC6: LA4801V IC7: CXD2655BR IC8: MN41V4400TT-07 or MN41V4400TT-08 IC9: CXA2523AR IC10: AK93C45AV IC12: BD6601AKVT IC13: NJU7011F Q1,11,15 : CPH3106 Q2: DTC323TK Q3: XP161A0390PR Q4,6,9: DT

35、C114YUA Q5,14: 2SA1745(6.7) Q7: 2SC4116(Y,GR) Q8: CPH3209 Q10: UMX1N Q12,16: DTC114TUA Q13: DTA114EUA Q17: 2SK3018 D1,7,10,11 : MA111 D2,3,5: U2FWJ44N D4: RB717F D8,12: DA204U D9: UDZ10B (BOTTOM VIEW) (BOTTOM VIEW) B38-0172-05ED1: DMC-K3(L) DMC-K3(S) DMC-K3(BL) IC8 IC4 IC12 IC5 (X33-1180-00) IC9 IC7

36、 MECHA. ASSY MDP-03 (X92-2140-10) PICKUP (KMS-281A) IC3 2.8V 0V 1.7V 0V 0.7V 0.6V 2.8V 0V 0V 2.7V 2.8V 2.8V 0.3V 2.0V 2.5V 2.7V 2.3V 2.5V 2.6V 2.5V 0V 1.2V 1.2V 1.1V 1.3V 1.1V 1.1V 1.4V 1.3V 1.3V 1.3V 1.3V 0.6V 0.3V 1.2V 2.6V 2.6V 2.6V 1.4V 1.3V 2.6V 0V 0.4V 1.2V 2.8V 0V 1.3V 0.6V 1.3V 2.6V 1.3V 1.4

37、V 1.2V 1.4V 1.3V 1.9V 1.4V 1.2V 1.4V 1.2V 1.3V 2.0V 2.8V 2.5V 2.8V 0V 0V 2.6V 0V 0V 0V 2.6V 2.7V 0V 1.1V 1.2V 1.1V 1.1V 1.3V 1.2V 0.8V 1.2V 1.4V 1.4V 1.3V 1.4V 1.3V 1.6V 1.7V 1.7V 1.9V 1.3V 2.6V 1.3V 2.5V 2.5V 2.5V 2.5V 2.6V 2.5V 2.5V 2.5V 0V 1.1V 2.5V 1.0V 2.5V 1.2V 2.5V 2.5V 2.5V 2.5V 2.6V 2.5V 2.

38、6V 2.6V 0V 0V 0V 0V 0V 0V 2.5V 2.6V 2.5V 2.8V 2.5V 2.5V 1.0V 1.2V 0V 1.1V 2.5V 2.6V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 0V 2.5V 2.8V 2.6V 2.6V 2.5V 1.9V 2.6V 2.6V 0V 0.3V 2.8V 0V 0.2V 0V 0.3V 2.2V 2.1V 1.0V 2.6V 1.5V 1.3V 0.6V 0V 0V 0V 0V 0V 0V 0V 0V 2.6V 0V 0V 0V 0V 3.7V 1.3V 6.2V 1.3V 7.4

39、V 2.7V 2.6V 2.8V 0V 2.8V 1.8V 0V 0V 1.4V 1.4V 1.4V 1.4V 1.8V 1.8V 1.8V 1.8V 0.3V 2.8V 2.8V 2.8V 2.8V 1.3V 1.1V 2.8V 2.8V 2.8V 1.4V 2.8V 0V 2.5V 2.8V 2.55V 2.2V 2.0V 2.6V 2.8V 2.5V 2.1V 2.8V 2.8V KMOQSLNPRT DMC-K3 Y22-8020-00 CAUTION: For continued safety, replace safety critical com- ponents only wi

40、th manufacturers recommended parts (refer to parts list). indicates safety critical components. For continued protection against risk of fire, replace only with same type and rating fuse(s). To reduce the risk of electric shock, leakage-current or resistance measurements shall be carried out (expose

41、d parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer. The DC voltage is an actual reading measured with a high impedance type voltmeter. The measurement value may vary depending on the measuring instruments used or on the product. HOLD C 1 2 3 4

42、5 6 7 8 16 15 14 13 12 11 10 9 EPSK 32 31 SEG13 40 39 38 37 36 35 34 33 SEG10 SEG11 SEG12 SEG7 SEG8 SEG9 SEG4 SEG5 SEG6 SEG3 SEG2 SEG1 TEST NC VSS COM DO SK CS 41 42 43 GND VDD ND 5 6 7 ND 8 44 45 46 47 DI 4 3 2 1 70 NO J TYPE 71 PW SW MUTE SW PWS EPCS EPDI EPDO VDD KEY0 52 50 48 49 51 54 53 55 56 C

43、HGOK KEY1 ADP AVREF1 AVSS NC NC AVREF2 AVREF3 67 68 69 64 65 66 BATT SE- SE+ ADON AVDD 61 62 63 57 0.01 58 C20 22K R32 59 C8 0.01 60 C9 1 R14 33K + 22u4 C21 PW SWMT SW 300K PW A 3K PW C PW B 3K BIAS VREF FILTER RIPPLE KEY VDD GND VC Lch Rch DATA + 4.7u4 C113 + 4.7u4 C114 0.01 C109 2.2 R109 R108 2.2

44、0.01 C108 0.15 C104 4.3 R104C105 0.15 R105 4.3 + 4.7u4 C119 1 C101 1 R102 1 C100 R60 100Kx2 1 C60 47u4 C115 + 10K R100 3.3M R110 + 4.7u4 C110 6.2K R106 1500P C102 560 R112 C106 0.1 100K R103 10K R101C111 4.7u4 + R113 560 R111 3.3M R107 6.2K C103 1500P R73 13K C13 0.01 C16 0.01 750 R39 1000P C46 C48

45、0.01 L3 22uH VOUT EXTVSS 12 3 4.3K R6 C55 100u4 + C4 100u4 + 560 R12 1.2K R23 3.9K R18 240 R20 0.33 R8 2.7K R16 C3 100u4 + R2 3.3K 470P C2 330 R56 1/4W C10 0.01 L1 22uH 8.2K R7 10K R74 1K R69 0.1 C6 6.8K R57 56K R71 3 2 15 4 GND VIN EXT CE FB S13 S12 S11 S10 S9 S8 S5 S6 S7 S4 COM S1 S2 S3 R22 150K 1

46、00Kx2 R62 HOLD ON 330K R36 R29 470K 470K R28 C62 0.1 R37 100Kx2 C66 1 C7 1 61 62 10K 58 59 C19 0.01 10K R33 51 C58 0.01 R30 560Kx4 180Kx2 R31 130K R49 0.01 C59 0.01 C64 4 5 2 1 3 6 50 49 Q8,10 Q1,3,12 IC2 Q17 2.7K R24R25 3.0K R26 4.3K R34 8.2K R35 18K 59 60 L6 22uH 4.7u4 C112 + 22u4 C116 + 2.2 R50 5

47、1 R70 58 5 12 57 57 0.01 C47 16 16 50 49 60 +B +B +B +B +B+B +B+B +B+B+B +B+B +B+B +B +B +B +B +2.8V +2.8V +2.8V +2.8V+2.8V +2.8V+2.8V +2.8V +2.8V+2.8V +2.8V +2.8V +2.8V +2.8V+2.8V +2.8V+2.8V +2.8V +2.8V+2.8V +2.8V+2.8V +2.8V+2.8V +2.8V +2.8V +2.8V +2.8V +2.5V +2.5V+2.5V +2.5V+2.5V +2.5V +B 21 22 20

48、 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 COM S19 S18 S17 S16 S15 S14 S13 S12 S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1 COM 2 10K1K10K 22u16 C1 + E PROM VOL J1 Q16 Q6 Q17 D12 GND J2 SW +B CAR BAT

49、TERY AC ADAPTOR Q11 Q1 Q2 IC2 Q12 Q3 Q15 Q4 Q8 Q10 D11 D3 D2 D9 D5 D1 D4 D7 S2 HOLD SW IC13 DC IN 4.0-5.1V ALKALINE BATT. : 1.5V Ni-HM : 1.2V (STEP DOWN) DC-DC CONVERTER PROTECTION CONTROL RECHARGEABLE CURRENT SWITCHING TR (STEP UP) CONVERTER DC-DC ON/OFF 2.8V AMP MUTE AC ADPTER SOUND BEEP BOOST BASS PHONES AMP PHONES VOL S3S4S5S6S7S8 J K: 4.5V/450mA : 5.1V/380mA : 4.0V (BOTTOM VIEW) ANALOG(R) ANALOG(L) ANODE CONNECTION COM1 PIN S12 1a3 1b4 1c5 1d6 1e7 1g8 1f9 S210 2a11 2b12 2c13 2d14 2e15 2g16 2f17 S318 S419 S520 COM :