Spindle Circuit - LG GSA-H20A Service Manual

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, 48x CAV : CD-ROM/R
6) DVD 12x CAV : Single Layer DVD-ROM(Movie), Dual Layer DVD-ROM, DVD+RW, DVD-RW, DVD+R
Double Layer
7) DVD 12x CAV : DVD+R, DVD-R
6) DVD 16x CAV : Single layer DVD-ROM(Data)
-Spindle Servo is controlled by IC201(MN103SB4G) and servo signal is output via SP-DRV(Pin68).
52
IC121 AN22117A
Wobble Signal
Generator
RF
SRF
SPDRV
68
WBLIN
EFM
IC201 MN103SB4G
SERVO DSP
Frequency
Controller
Phase Controller