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RF SIGNAL IC2001 (ODC/DSC) IC2501
(MOTOR DRIVE)

MOTOR DRIVE SIGNAL

TRACKING ERROR SIGNAL

FOCUS ERROR SIGNAL

R03 A B 120 AD3 TRSDRV 67 82 TSTSG TR+ FI2 LOGIC CIRCUIT TBAL 65 TR29 FI4 PREDRIVER H-BRIDGE RI3 F03 FBAL 66 C 111 ARF 13

22 TRAVERS MOTOR 24

TRS-

21

D

110 NARF

PICK-UP UNIT
ACTUATOR

PWM4 56

TRS+

20

FI3 F01 8 F+ FOCUS COIL

TIL TP 70

ACT MUT L

31

STB

RESET

R01

6

FTRACKING COIL

E

52 BD0 PWM6 62

FO+

4

FI1

F02

9

T+

F04 PWM7 63 F 51 OFTR FO5 RI1

25

T-

G

119 AD2

HDD8 172 HDD9 168 HDD10 166 HDD11 164 HDD12 160 HDD13 158 HDD14 151 HDD15 149

STD0 STD1 STD2 STD3 STD4 STD5 STD6 STD7

TO IC3001

IC2501-6,8,9,25 7.0Vp-p(20usec./div.)

H

98 RF DIF

SPINDLE MOTOR UNIT
I 117 AD0 TILT 71 J 115 DAC1 TRV-SW+ SW2 TRAVERSE SWITCH

IC2502
(SPINDLE MOTOR DRIVE)

K

118 AD1 PWM5 61 PWM8 64 EC PHS 11 12 PWMIN PHS PHASE SHIFT KVAL BLOCK

H+ ROTOR POSTION DETECTOR H-

9 10

H2+ H2HALL2

L

106 VHALF MEMORY AND MEMORY SCAN

WAVEA WAVEB WAVEC

DIGITAL MULTIPLIER

PWM CONVERTER PWMOUTA PWMOUTB PWMOUTC

IC2502-19 3.4Vp-p(5msec./div.) M N O P Q R 53 54 55 75 74 83 PWM1 PWM2 PWM3 IDGT DTRD VFOSHORT HFG HFG

FREQUENCY MULTIPLIER

THERMAL SHUTDOWN

OUTU FG 69 19 POWER SECTION OUTV OUTW 1 STB INDUCTIVE SENSE START UP BLOCK 0.2V CURRENT LIMITER LOW VOLTAGE DETECTOR

4 5 6

A1 A2 A3

S T U V

114 34 2 5

DAC0 NCS NINT1 NINT2

8

RF1

W

DVD-LV50EB/EG SERVO BLOCK DAIAGRAM

DVD-LV50EB/EG SERVO BLOCK DAIAGRAM