Sony MZ-R900 Service Manual - Page 27

SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM - SERVO Section - OPTICAL PICK-UP BLOCK (LCX-4R) HR601 OVER WRITE HEAD OVER WRITE HEAD DRIVE Q604, 605 IY IX JX JX JY JX JY IX IY IX A A BC D B C D MON LD LD-A 2-AXIS DEVICE S0 S1 TRK+ (FOCUS) (TRACKING) TRK- FCS+ FCS- RF AMP, FOCUS/TRACKING ERROR AMP IC501 4 VREF AUTOMATIC POWER CONTROL Q501 IY 8 9 IX 10 JX 11 JY A 12 B 14 5C 6D A-C 13 7 D-C 18 PD-NI RF AMP, FOCUS ERROR, TRACKING ERROR TPP/WPP APC 20 PD-O PEAK /BOTM RF OUT 33 PEAK 29 BOTM 28 ABCD 41 FE 42 TE 1 ADIP IN 44 ADIP 21 PD-I 19 VC 31 OFTRK 26 RESET 25 SERIAL INTERFACE S-MONITER SBUS 23 SCK 24 S-MON 43 TRK+ TRK- FCS+ FCS- M602 (SLED) M M601 W (SPINDLE) U V MZ-R900 M603 OVER WRITE HEAD M UP/DOWN 37 RFI 44 PEAK 45 BOTM 46 ABCD 47 FE 56 TE 74 ADIP 78 APCREF 49 VC 12 VREF MON 217 OFTRK 221 XRF RST 160 SSB DATA 161 SSB CLK 9 S MON 194 PD S0 195 PD S1 35 HB 33 HA OUTA 41 38 OUTB 25 VREF SW RECON OE RI FI OVER WRITE HEAD DRIVE IC601 (1/2) EFM PRE DRIVER H-BRIDGE PRE DRIVER SYSTEM CONTROL (1/2) 123 56 199 198 197 201 200 EFM 7 CLK 4 VRECIN2 37 VRECIN1 42 C1H CHARGE 28 PUMP 1 C1L 27 C2H CHARGE 31 PUMP 2 C2L 38 VRECO B+ MODE3 MODE2 MODE1 HD CON2 HD CON1 SYSTEM CONTROLLER, DIGITAL SIGNAL PROCESSOR, 16M BIT D-RAM IC801 (1/3) TRK+ TRK- FCS+ FCS- 33 FO3 35 RO3 10 FO1 8 RO1 FOCUS/TRACKING COIL DRIVE, SPINDLE/SLED MOTOR DRIVE IC551 TRACKING COIL DRIVE FOCUS COIL DRIVE 14 FO2 42 CPAIP 12 RO2 41 CPAIM 29 FO4 40 CPBIP 31 RO4 39 CPBIM SLED MOTOR DRIVE CPA0 38 CPB0 37 SLED VOLTAGE MONITER FI3 25 RI3 24 FI1 19 RI1 18 FI2 17 RI2 16 PWMI4 20 FI4 26 RI4 27 PWM 5 SPINDLE SERVO DRIVE SWITCH IC805 SLD 1 MON SLD 2 MON 48 UO 53 CPUI 46 VO 52 CPVI 44 WO 51 CPWI 54 COM SPINDLE MOTOR DRIVE SPINDLE VOLTAGE MONITOR UI 4 VI 3 WI 2 BIAS OF 6 CPWO CPVO CPUO 55 56 1 • SIGNAL PATH : PLAYBACK : REC (ANALOG IN) : REC (DIGITAL IN) EFMD 105 DIN1 62 ADDT 68 DADT 67 DIN1 A (Page28) ADDT B (Page 28) DADT C (Page 28) CLK D (Page 29) 81 TFDR 80 TRDR 82 FFDR 83 FRDR 233 SLD MON 96 SLDR 98 SLDV 97 SFDR 99 SLDW SLCU 100 SLD1 MON SLCV 101 SLD2 MON 102 SLCW 166 SPDL AUX PWM 88 SPFD/SPVS/PWM3 223 SPDL MON 87 SPDU 89 SPDV 90 SPDW SPCU 93 CLV MON U SPCV 94 CLV MON V SPCW 95 CLV MON W 220 XRST MTR DRV CLV MON W CLV MON V CLV MON U 27 27 VREF E (Page 29)