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Spindle Circuit - LG GWA-4164B Service Manual

Dvd/cd rewritable drive
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3. Spindle Servo Circuit
3-1. Spindle Servo Process
Pick-up
E
F
B
A
C
D
G
H
Spindle Motor
M
IC301 BD7956FS
3-2. Spindle Servo
Spindle servo is as following ;
1)
Wobble CLV 4x, 10x, 16x, 24x, 32x, 40x : Blank area in CD-R, CD-RW
2)
Wobble CLV 1x, 2x, 2.4x, 4x, 8x : Blank area in DVD+/-R/RW
3)
CD 15x CAV : Video CD, CD-DA(Audio out)
4)
CD 32x CAV : CD-RW, CD-DA(DAE)
5)
CD 40x CAV : CD-ROM/R
6)
DVD 8x CAV : Single Layer DVD-ROM(Movie), Dual Layer DVD-ROM, DVD+RW, DVD-RW, DVD+R
Double Layer
7)
DVD 10x CAV : DVD+R, DVD-R
6)
DVD 16x CAV : Single layer DVD-ROM(Data)
-Spindle Servo is controlled by IC201(MN103SA6G) and servo signal is output via SP-DRV(Pin70).
IC121 AN22113A
Wobble Signal
Generator
RF
SRF
SPDRV
68
WBLIN
EFM
IC201 MN103SA6G
SERVO DSP
Frequency
Controller
Phase Controller
55

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Gwa-4166bGsa-4166b