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4. Spindle Circuit
4-1-1. Block Diagram(FGCAV Servo)
Disc
Motor unit
SPD
R330
R329
C319
1.65V
4-1-2. FG CAV Servo
1) CD 40x CAV : CD-RW, CD-R, CD-ROM
2) DVD 8x CAV : DVD+RW, DVD-ROM dual
3) DVD 10x CAV : DVD+R
4) DVD 16x CAV : DVD-ROM(Single)
When drive read PRESS CD, Closed Session CD-R/RW, the spindle motor is controlled using FG CAV Spindle
Servo. FG signal(M63041AFP 19pin) input to SFG in DSP IC(IC301 86pin).
The spindle controller in DSP IC uses SFG as spindle rotation frequency feedback, therefore the FG CAV
Spindle Servo doesn't work well if FG generation is abnormal.
The spindle controller PWM output signal SPD(IC301 88pin) input to SPIN in Drive IC(M63041AFP 1pin)
after Low-Pass Filtering.
The PWM output signal U, V, W signal(M63041AFP 12, 13, 14pin) drives Spindle Motor without using a sensor,
and FG pulse output is generated as 18 pulses/rotation.
Optical
Pick-up
HOP-8541T
IC301
R8J32005FP
SPD
P
M
88
W
U
M
X
U
V
W
VCK4M
Control Clock
CAV FD
CAV PD
Motor Kick
REG
12
IC601
13
M63041AFP
14
XCO
XCL
Generator
+
VCK4M
SPIN
1
DAVC
42
1.65
CTL1
20
CTL2
21
19
FG
X301
33.8688MHz
254
255
SFG
86
R326
3.3V
SPD
CTL1
CTL2
SFG
47
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