Carvin_sx300cdsp 电路图 维修原理图.pdf

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1、TSTIO1 TSTIO2 TSTIO3 SDOUT2 SDOUT3 SDOUT1 DZFSET AOUTR2 AOUTL2 AOUTR1 AOUTL1 TSTI1 SDIN2 SDDA2 SDIN1 SMODE TSTI2 CASRF RASCE VRDAL VRDAH AINR- AINR+ AINL- AINL+ VRADL VRADH OPCL PDAD PDDA SDAD SDDA BCLK LRCK CLK0 DVDD DVSS DVSS DVDD SCLK WRDY DRDY DVSS DVDD DVSS DVDD DVSS DVDD DZF2 DZF1 AVSS AVDD VC

2、OM AVSS AVDD RST DVB DVB XTI XTO WRQ A16 A15 A14 A13 A12 A11 A10 IO0 IO1 IO2 IO3 IO4 IO5 IO6 IO7 DVB DVB AVB AVB 100 PD 10111213141516171819202122232425 262728 CS 2930313233 S1 343536 SO 373839 WE 4041424344454647 A9 484950 A8 51 A7 52 A6 53 A5 54 A4 55 A3 56 A2 57 A1 58 A0 59 OE 6061626364656667686

3、9707172737475 7677 NC 78798081 NC 82838485868788 NC 8990919293949596979899 NC 1 A K 7 7 1 2 23456789 U1 IDT71024 I/O7 I/O6 I/O1 I/O5 I/O4 I/O3 I/O2 I/O0 A16 A10 N/C A13 A11 A14 A12 CS1 CS2 GND A15 Vcc A9 23 21 24 OE 25 A7 A6 A5 A4 A3 10 A2 19 18 17 15 13 12 A0 11 A1 27 A8 22 20 26 14 28 29 WE 30 16

4、31 32 2 3 4 5 6 7 8 9 1 U3 T16 T16 T15 T15 T14 T13 T13 T12 T12 T11 T11 T10 T10 T9 T9 T8 T8 T14 +5 V DSP C432 + C433 + R437 27pF 27pF Y1 T2 T0 T1 T3 T4 T5 T6 T7 P402cw P403 cw ADJUST 1 SELECT 1 R448 R449 +5 V DSP C424 + 0.1u C423 +0.1u C425 + 22u +5 V DSP +5 V DSP C426 + 0.1u +5 V DSP +5 V DSP C421 +

5、 0.1u C420 + 22u +5 V DSP R426 R435 H2.A H2.C H2.E H2.G +5 V DSP +5 V DSP +5 V DSP +5 V DSP +5 V DSP +5 V DSP +5 V DSP C435 + 0.1u C427 + 0.1u C428+ 0.1u C430 +0.1u C434 +0.1u C431 + 0.1u C429 + 0.1u R425 VCOM P2.0 P1.3 P1.2 P0.5 P0.2 P0.1 P0.4 P0.3 P1.7 P1.4 P1.6 P0.0 P0.6 P1.0 P1.1 P1.5 P2.1 P0.7

6、VDD VSS 19 16 15 12 17 14 11 U2 10 20 18 13 9 6 5 2 8 7 4 3 1 8 7 L P C 7 6 4 +5 V DSP +5 V DSP C422 0.001u A16.B 6 5 + 7 R422 R423 C419 39pF R427 R424 A16.A 2 3 + 1 8 4 +5 V DSP 10K R421 C418 39pF GND A C415 + C436 0.1F R436 10K H2.H H2.F H2.D H2.B C437 0.1u R438 R408 15K R409 15K R447 +5 V DSP C44

7、0 0.22u +5 V DSP C414 + 0.1 R499 POWER D499 220 22k C417+ 0.1u R417 C416 + OP1.A 1F OP1.B R420 4.7k R419 Diode 1N914 SMT D476 470 330 C438 0.1F C439 0.1F 12340 World Trade Drive San Diego, CA 92128 (858) 487-1600 FAX 487-6629 REVISED BY: APPROVED: DRAWN BY: DATE: DATE: ASSY. DATE: ARVIN REV: REV: NO

8、: PCB NO: C A.J.Ashley 10K 330 330 4.7K 4.7K 1M 0.1 10K 10K 1K 680 100K AT25160 HOLD SCK GND Vcc WP SO CS SI U4 6 4 3 2 1 7 8 5 +5 V DSP +5 V DSP D404 R G Q403 Q401 R446 R440 BIT2 47K 47K R439 1k SER/PARL RESET SCLK LCLK GND Vcc QH 10 11 12 13 SA14 1516 U5 B 1 C 2 D 3 E 4 F 5 G 6 H 7 8 9 A 7 4 H C 5

9、 9 7 +5 V DSP CH1 CH2 CH3 N:2 N:8 N:9 N:10 R444 100 R441 150 BIT1 BIT2 A40.A 4 5 + 2 A40.B 6 7 +1 A40.C 10 11+ 13 A40.D 8 9 +14 R454 10K D405 D406 R452 10K R451 100K 1N914 1N914 COMP REF COMP REF COMP REF CH1 FET - CH2 FET - CH3 FET - - When Channel OFF - When Channel 3 OFF CH1 FET + N:62 Q405 R453

10、100K CH1 LED CH1 LED Q402 R443 68 R442 470 R445 BIT1 47K CH1D401 CH2 D402 CH1 FET +N:62 R434 R433 2.2k 2.2k S401.A S401.B CHANNEL SWITCH S402.A S402.B S403.A S403.B R430 10K R429 10K R431 10K CH1 CH2 CH3 +5 V DSP +5 V DSP +5 V DSP CH3 D403 R432 2.2k -15VDC REDYELLOW GREEN R483 R574 Q565 R563 R564 Q5

11、75 R573 +5 V DSP D GND2 N:500 N:501 N:503 N:15 N:13 N:14 +5V BIT1 BIT2 N:13 N:14 N:2 N:8 N:9 N:10 BIT2 +5 V DSP D475 4 2 3 1 H44B H41B.A H41B.B H41B.C H41B.D H41B.E H41B.F H41B.G H41B.H H5.A H5.B H5.C H5.D +5 V DSP H41A.A H41A.F H41A.H R472 R473 R481 22k 10k 10k Q20 Q21 R15 47K Channel Logic CH1 ON

12、CH2 ON CH3 ON BIT1(PX_COUT0)010 BIT2(PX_COUT1)001 CH1 FET+-1500 CH1 FET-0-15-15 CH2 FET+0-150 CH2 FET-150-15 CH3 FET-15-150 switch pressedCHB1CHB3CHB2 Pin 20, Pin 19, R16 10k -15VDC Q22 R17 47K - When Channel 2 OFF 0 WHen ON R18 10k -15VDC Q23 R23 47K 0 WHen ON 0 WHen ON 0 When Channel 2 OFF - WHen

13、ON 0 When Channel 2 OFF - WHen ON -15VDC Q24 R30 47K -15VDC Q25 R28 47K 10K R32 +5 V DSP 10K R3310K R3410K R3510K 30- 03300 80- 03300 B D GND FRONT D GND FRONT D GND FRONT J7 1 2 3 45 N:80 S900.A S900.B R900 10K +5 V DSP N:57 N:57 H40B.A H40B.B H40B.C H40B.D H44A.A H44A.B H44A.C H44A.D R488 15K R489 15K A 9JAN03 SX 300 Combo/Head DSP SECTION 收音机爱好者资料库 Ra d i o Fa n s .CN