cxd1125q-service-manual维修手册

DPC-80CIRCUIT DESCRIPTIONU401:DIGITAL SIGNAL PROCESSING LSI8.8-bit tracking counterFOR THE CD (CXD1125Q)9.CPU interface with a serial busGeneral10.Sub code Q registerThe CXD1125Q is a digital signal processing LSI for a Com-11.Output to digital audio interfacepact Disc player,and has the following functions.1.Bit clock reproduction by an EFM-PLL circuitFeatures2.EFM data demodulationAll digital signals used in playback can be processed using3.Frame sync signal detection,protection and insertiononly a single chip4.Powerful error detection and correction.Digital audio interface output circuit5.Interpolation with an average value,or by holding the previ-ous valueStructure6.Demodulation of a sub code signal,error detection of aCMOS ICsub code Q7.Spindle motor CLV servoBlock diagram2(26 SOEXASY 6SubcodeSubcodeSubcode QSOCKSync DetectorRegisterSUBOEFM(5-20CRCFPDO 1123-bi1EFM-PLLEFM Demodulotor290808Snift Register370801GFs②@-LOCKvooFSWCLV ServoFrameTESTErrorMDPsync detector/Controlprotector/inserterderector /correctorXRSTMOSMUTGMONMD1MD2vcooMD3vco circuitPSSL9timing generotorInterpolatorSLOB②XTAO62X'TAL circuitiming generotoSelecto60APTRAPTLWDCKLRCKCNIN 17Tracking counteRAM oddressDigital our信总安黄总星美昌屋27