Spindle Servo Circuit - LG CED-8042B Manual

4. Spindle Servo Circuit

4-1. Spindle Servo Process
Spindle Servo Process
Pick up
E
F
A D
B C
G
H
Spindle Motor
M
Hall sensor
6
4-2. Spindle Servo
CED-8041B Spindle servo is as followings;
1) CD EFM CLV X1, X2, X4, X8 : CD-DA, Video CD, Recorded area in session-opened CD-R, Recorded
area in CD-RW.
2) CD X24 CAV : CD-ROM, Session-closed CD-R.
3) Wobble CLV X1, X2, X4, X8 : Blank area in CD-R, CD-RW.
1) & 2) – Spindle servo controlled by IC501 (CXD3011R) and servo signal is out via MDP (Pin 117).
3) – Spindle Servo is controlled by CLV Control Block of IC209 (RL5E808B).
8
IC551
LB11995H
IC601 AK8563
Wobble Signal
Generator
RF
SRF
IC501
CXD3011R-1
CD EFM CLV
CAV x24
ATIP CLV, FG
IC552
NJM3403AV
SPNFG, SPNREV, SPNON
3
PLL BLOCK
IC209
RL5E808
Wobble Signal
Demodulation
ATIP CLV Control
IC202
m -com
27