15.2. SERVO BLOCK DIAGRAM(LOADING MOTOR DRIVE)IC2591TRAY CLOSETRAY OPENTRAY SET2TRAY SET1(OPERATION MICON)IC60012827RFENV49 100(0.5sec./DIV.)CLOSE 2.5Vp-pIC2591-2(UP),IC2591-4(DOWN)5.0Vp-p(20usec./div.)IC2501-127.2Vp-p(20usec./div.)IC2511-11,12,13,14(0.5sec./DIV.)OPEN 2.5Vp-pIC2591-2(UP),IC2591-4(DOWN)RF SIGNAL SPINDLE MOTOR DRIVE SIGNAL STEPPING MOTOR DRIVE SIGNAL TRACKING ERROR SIGNAL FOCUS ERROR SIGNALBRKFINRINSSFGECECROPIN2-OPIN1-OPIN3-OPIN4-BRKSSFGECECRTRV-SWFOCUS DRIVETRAKING DRIVETRSDRV-BTRSDRV-AOFTRBDOFBALFETBALTEVIN4VIN3VIN2VIN1VIN8VIN7STNBYSTD1SCKSENDAT3DAT2DAT1DAT0SBI1SBO1SBT1CPUIRQCPCENCPSENOUT2OUT1A3A2A1H1+H1-H2+H2-H3+H3-VO2-VO2+VO1-VO1+VO4+VO4-VO3+VO3-QCDOPTICAL PICK UP UNITPHOTO DETECTORB3B4B2B1A3A2A4A1LASER DIODEAMPHEADQ5201LD DRIVE12IC6303(EEPROM)1121131141157176464579727047265IC6201(CPU)IC7001(ODC)INTERFACEBALANCEFOCUSBALANCETRACKING121615146059585755546232572920(FEP)IC5201797778809089888786854749443432555653521559654251232610235689121817139724262728111213141516171863(DSC)IC20012930(MOTOR DRIVE)(SPINDLE MOTOR DRIVE)IC2501IC2511M2601LOAD M-LOAD M+ MOTORLOADINGS2601TRAY OPENTRAY CLOSEM3M2M1H1-HALL1H1+H2-H2+ HALL2H3+H3-TRV-SWHALL3TRAVERSE SWITCHACT T-ACT T+ACT F-ACT F+STEPPING MOTOR UNITSTEPPING MOTORLOADING MOTOR UNITSPINDLE MOTOR UNITOPTICAL PICK UP UNITACTUATORCOILTRACKINGCOILFOCUS36
