15.2. SERVO BLOCK DIAGRAM
|
| RF SIGNAL |
OPTICAL PICK UP UNIT | IC5201 | IC2001 |
(FEP) | (DSC) |
PHOTO DETECTOR |
| VIN7 | 54 |
|
|
|
| |
|
|
|
|
|
| |||
|
|
| VIN8 | 55 |
|
|
|
|
|
|
|
|
|
|
|
| |
B1 | B2 |
| VIN1 | 57 |
|
|
|
|
A1 | A2 | HEAD |
|
|
|
|
| |
|
|
|
|
|
| |||
A4 | A3 | AMP | VIN2 | 58 |
|
|
|
|
B4 | B3 |
|
|
|
|
|
| |
|
|
|
|
|
|
| ||
|
|
| VIN3 | 59 | 49 | RFENV |
| 100 |
|
|
|
|
|
| |||
|
|
| VIN4 | 60 |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
| 20 | TE |
| 2 |
|
|
|
|
|
|
| ||
|
| LASER DIODE |
|
| TRACKING |
|
|
|
|
| Q5201 |
|
|
|
|
| |
|
|
|
| BALANCE |
|
|
| |
|
| LD DRIVE |
| 2 | 6 | TBAL |
| 43 |
|
|
|
|
| ||||
|
|
|
| 1 | 29 | FE |
| 3 |
|
|
|
|
|
| |||
|
|
|
|
| FOCUS |
|
|
|
|
|
|
|
| BALANCE |
|
|
|
|
| IC6303 |
|
| 7 | FBAL |
| 44 |
|
|
|
|
|
| |||
|
| (EEPROM) |
|
|
|
|
|
|
|
| D 5 |
|
|
|
|
|
|
|
| C 6 |
|
|
|
|
|
|
|
| Q 2 |
|
|
|
|
|
|
|
|
|
|
| 25 | BDO |
| 49 |
|
|
|
|
|
|
| ||
|
|
|
|
| 23 | OFTR |
| 47 |
|
| IC6201 |
|
|
|
| ||
|
|
|
|
|
|
|
| |
|
| (CPU) |
|
| INTERFACE |
|
|
|
|
| 47 | SEN | 14 |
|
|
|
|
|
|
|
|
|
|
| ||
|
| 70 | SCK | 15 |
|
|
|
|
|
|
|
|
|
|
| ||
|
| 72 | STD1 | 16 |
|
|
|
|
|
|
|
|
|
|
| ||
|
| 79 | STNBY | 12 |
|
|
|
|
|
|
|
|
|
|
| ||
|
| 45 |
|
|
|
| CPSEN | 85 |
|
|
|
|
|
|
| ||
|
| 46 |
|
|
|
| CPCEN | 86 |
|
|
|
|
|
|
| ||
|
| 76 |
|
|
|
| CPUIRQ | 87 |
|
|
|
|
|
|
| ||
|
|
|
|
|
|
| SBT1 | 88 |
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
| SBO1 | 89 |
|
|
|
|
|
|
|
| |
|
| 71 |
|
|
|
| SBI1 | 90 |
|
|
|
|
|
|
|
IC7001
(ODC)
115 | DAT0 | 80 |
| ||
114 | DAT1 | 79 |
| ||
113 | DAT2 | 78 |
| ||
112 | DAT3 | 77 |
|
SPINDLE MOTOR DRIVE SIGNAL | STEPPING MOTOR DRIVE SIGNAL | TRACKING ERROR SIGNAL |
| FOCUS ERROR SIGNAL | ||
|
|
|
|
| STEPPING MOTOR UNIT | |
|
| IC2511 |
|
| STEPPING MOTOR | |
|
| (MOTOR DRIVE) |
|
|
| |
|
|
| VO3- | 18 |
|
|
|
|
| VO3+ | 17 |
|
|
51 | 26 | OPIN4- |
|
|
| |
|
|
|
| |||
|
|
| VO4- | 16 |
|
|
|
|
| VO4+ | 15 |
|
|
42 | 23 | OPIN3- |
|
|
| |
|
|
|
| |||
|
|
|
| OPTICAL PICK UP UNIT | ||
|
|
|
|
|
| |
|
|
|
|
| ACTUATOR | |
|
|
|
|
|
| |
5 | TRAKING DRIVE | 3 | OPIN1- |
|
| FOCUS |
|
|
| ||||
|
|
|
|
| ACT F+ | COIL |
|
|
| VO1+ | 14 |
| |
|
|
|
|
| ||
|
|
| VO1- | 13 | ACT F- |
|
| FOCUS DRIVE |
|
|
| ||
6 | 6 | OPIN2- |
|
| TRACKING | |
|
|
| ||||
|
|
|
|
| ACT T+ | COIL |
|
|
| VO2+ | 12 |
| |
|
|
|
|
| ||
|
|
| VO2- | 11 | ACT T- |
|
|
|
|
|
|
SPINDLE MOTOR UNIT
|
|
|
|
|
|
| TRAVERSE SWITCH |
59 |
|
|
|
|
| ||
| IC2501 |
|
|
|
| ||
|
|
|
|
|
| ||
|
| (SPINDLE MOTOR DRIVE) |
|
|
|
| |
|
|
|
| H3- | 9 | H3- |
|
|
|
|
|
|
| ||
|
|
|
|
|
| H3+ | HALL3 |
|
|
|
| H3+ | 8 |
| |
|
|
|
|
|
| ||
15 | ECR | 17 | ECR | H2- | 6 | H2- |
|
|
|
| |||||
| EC |
|
|
|
| H2+ | HALL2 |
52 | 18 | EC | H2+ | 5 |
| ||
|
|
| |||||
53 | FG | 12 | FG |
|
|
|
|
|
|
|
|
| |||
|
|
|
| H1- | 3 | H1- |
|
|
|
|
|
|
| ||
|
|
|
|
|
| H1+ | HALL1 |
|
|
|
| H1+ | 2 |
| |
|
|
|
|
|
| ||
|
|
|
|
|
|
| |
|
|
|
|
|
|
| |
|
|
|
| A1 28 | M1 |
| |
|
|
|
|
|
| ||
56 | SS | 10 SS | A2 27 | M2 |
| ||
|
|
| |||||
|
|
|
| A3 26 | M3 |
| |
| BRK |
|
|
|
| ||
55 | 13 | BRK |
|
|
|
| |
|
|
|
|
|
IC6001 |
| IC2591 |
|
| LOADING MOTOR UNIT |
| |
(OPERATION MICON) |
|
|
|
| |||
|
| (LOADING MOTOR DRIVE) |
|
|
| ||
30 | TRAY SET1 | 9 | RIN |
|
|
| M2601 |
29 | TRAY SET2 | 7 | FIN |
|
| LOAD M+ | LOADING |
|
|
|
| OUT1 | 4 | MOTOR | |
|
|
|
|
| |||
|
|
|
| OUT2 | 2 | LOAD M- |
|
|
|
|
| S2601 |
| ||
|
|
|
|
|
|
| |
27 | TRAY OPEN |
|
|
|
| TRAY OPEN |
|
28 | TRAY CLOSE |
|
|
|
| TRAY CLOSE |
|
|
|
|
|
| |||
|
| OPEN |
| CLOSE |
|
|
|
|
| (0.5sec./DIV.) |
| (0.5sec./DIV.) |
|
|
|
36