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4-2-1. Block Diagram (Wobble CLV Servo)
54
Disc
Motor uni
t
Optical
Pick-up
HOP-7632TS
IC101
R2S35002
HPF
S
/
H
-
+
C174
C173
C171
C172
WBLSH
C116
87
88
89
90
92
93
94
95
HPF AGC2
HPFBPF AGC3
HPF
HPF
37
31
WBLS
GND
H
18 19
AGC1
20
VREF
WAG1 WAG2 WAG3
SA
SB
SC
SD
MA
MB
MC
MD
+
-
C117 C118
ADO
BCO
IC301
R8J32007
M
U
X
P
W
M
SPD
PH
SP
211
Motor Kick
REG
154
R349
R375
C349
1.65V
1.65V
SPD
WOBSIG
4-2-2. Wobble CLV Servo
CD-R : 4x, 8x, 16x, 24x, 32x, 40x, 48x
/CD-RW : 4x, 10x, 16x, 24x, 32x
/DVD-R : 2x, 4x, 8x, 16x(PCAV)
/DVD-R DL : 2x, 4x
/DVD-RW : 1x, 2x, 4x, 6x
/DVD+R : 2.4x, 4x, 8x, 12x, 16x(PCAV)
/DVD+R DL : 2.4x, 4x, 6x
/DVD-RAM : 2x, 3x, 3-5x(PCAV)
/DVD+RW : 2.4x, 4x, 8x
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(R2S35002 37pin) input to DSP IC(R8J32007 154pin). The DSP Controller in R8J32007
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 (R8J32007 211pin) input to SPIN in Drive IC(R2S30202FP 1pin)
after Low-Pass Filtering.
The PWM output signal U,V, W signal(R2S30202FP 12, 13, 14pin) drives Spindle Motor without using a sensor.