4-2-1. Block Diagram (Wobble CLV Servo)
47
Disc
Motor unit
Optical
Pick-up
HOP-7532TS
IC101
HD153724TF
HPF
S
/
H
-
+
WBLSH
C119
85
86
87
88
95
96
97
98
HPF
AGC2
HPF
BPF
AGC3
HPF
HPF
46
35
WBLSH
21
22
AGC1
23
VREF
WAG1
WAG2
WAG3
SA
SB
SC
SD
MA
MB
MC
MD
+
-
C120
C121
ADO
BCO
IC301
R8J32006FP
M
U
X
P
W
M
SPD
PH
SP
88
Motor Kick
REG
56
R330
R329
C319
1.65V
1.65V
SPD
WOBSIG
4-2-2. Wobble CLV Servo
DVD-RAM: 2x, 3x, 5x / DVD-R: 16x(PCAV), 8x, 4x, 2x
/ DVD+R: 16x(PCAV), 8x, 4x, 2.4x
/ DVD-RW: 1x, 2x, 4x, 6x / DVD+RW: 2.4x, 4x, 8x
/ CD-R: 4x, 8x, 16x, 24x, 32x, 40x / CD-RW: 4x, 8x, 10x, 16x, 24x
When drive write DVD-RAM/R/RW/+R/+RW/CD-R/CD-RW, the spindle motor is controlled using Wobble CLV
Spindle Servo.
The WOBSIG signal(HD153724TF 46pin) input to DSP IC(R8J32006FP 56pin). The DSP Controller in
R8J32006FP uses WOBSIG as linear velocity feed back, therefore the Wobble CLV Spindle Servo doesn’t
work well when WOBSIG signal is abnormal.
The spindle controller PWM output signal SPD (R8J32006FP 88pin) input to SPIN in Drive IC(R2S30200FP
1pin) after Low-Pass Filtering.
The PWM output signal U,V, W signal(R2S30200FP 12, 13, 14pin) drives Spindle Motor without using a sensor.