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4-2-1. Block Diagram (Wobble CLV Servo)
Disc
Motor uni t Optical
Pick-up
HOP-8541T
WBLSH
SPD
SPD
R336
C319
1.65V
4-2-2. Wobble CLV Servo
DVD-RAM: 2x, 3x, 5x / DVD-R: 8x, 4x, 2x / DVD+R: 12x, 8x, 4x, 2.4x
/ DVD-RW: 1x, 2x, 4x / DVD+RW: 2.4x, 4x
/ 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(HD153722TF 46pin) input to DSP IC(R8J32005FP 56pin). The DSP Controller in
R8J32005FP 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 (R8J32005FP 88pin) input to SPIN in Drive IC(M63024AFP
1pin) after Low-Pass Filtering.
The PWM output signal U,V, W signal(M63041AFP 12, 13, 14pin) drives Spindle Motor without using a sensor.
48
SA
85
SB
S
86
/
SC
87
H
SD
88
MA
95
MB
96
MC
97
MD
98
WBLSH
35
IC301
R8J32005FP
P
M
88
W
U
M
X
Motor Kick
C119
WAG1
21 22
ADO
HPF
AGC1
HPF
BCO
BPF
IC101
VREF
HD153722TF
REG
C120
C121
WAG2
WAG3
23
-
+
AGC2
HPF
AGC3
+
HPF
-
HPF
WOBSIG
46
56
SP
PH
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