ONKYO DX-C34
Manual de Servicio

DX-C34 IC BLOCK DIAGRAM/ TERMINAL DESCRIPTION
Q501 : LC78683E MP3 DECODER FOR CD
INTB CMDOUT CMDIN CE CL

MDATA5 28 73 CMDOUT

BLOCK DIAGRAM

CKIN VPRFR VCOC VPDO CKOUT

System clockgenerator
VCO PLL

DRAM-I/F

DVDD2 21 80 DATACK

MDATA15 40 61 DVDD5

RASB CASUB CASLB

CPU-I/F

WOK CNTOK OVF

CD-DA shockproof
MDATA4 27 74 CMDIN

Data-I/F CDROM decoder

(Compressed or uncompressed)

MDATA3 26 75 CL

STREQ STCK STDAT CRCF

MDATA2 25 76 CE

OEB WEB

LRSY DATACK DATAIN C2FIN SFSY PW SBSY SBCK

OVF

MDATA7 30 71 CNTOK

DVDD3 31 70 WOK

33 68 DVDD6 MDATA8

CRCF MDATA9 34 67

MADRS[12:0] MDATA[15:0]

MP3 decoder

FSYNC

M U

X
RESB

STDAT MDATA11 36 65 MDATA12

Audio I/F

ADLRCK ADBCK ADDATA

PIN ASSIGNMENT

LRSY 1 ADDATA 2 ADBCK 3 ADLRCK 4 C2FIN 5 TEST1 6 CKIN 7 VSS 8 CKOUT 9 TEST2 10 DVDD1 11 PW 12 SBSY 13 SFSY 14 SBCK 15 AVDD 16 VPRFR 17 VCOC 18 VPDO 19 AVSS 20
23 78 MDATA0 RESB 24 77 INTB MDATA1 32 69 VSS 37 64 STCK

STREQ 38 63 MDATA13

60 59 58 57 56 55 54 53 52

MADRS0 MADRS1 MADRS2 MADRS3 MADRS4 MADRS5 MADRS6 MADRS7 VSS

LC78683 (Top view)

51 DVDD4 50 49 48 47 46 45 44 43 42 41

MADRS8 MADRS9 MADRS10 MADRS11 MADRS12 OEB CASUB CASLB WEB RASB

VSS 22 79 DATAIN

MDATA6 29 72

MDATA10 35 66 FSYNC

MDATA14 39 62 VSS