Major Ic Internal Block Diagram And Pin Description - LG DRD-820B Manual

MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN
DESCRIPTION
IC201 (TA1254F) : RF Signal Processing for CD/DVD
It amplifies or equalize the RF signal from Pick-up, and generate the TE (Tracking Error) and FE
(Focus Error) signal for Servo respectively.
The TE signal uses the DPD (Differential Phase Detect) method for DVD and 3 Beam method for
CD.
DVD FE=(A+C)-(B+D)
CD FE=A-B
Block Diagram
48 47 46
P1FN 49
P1FP 50
LDP1 51
P1DI 52
P1CI 53
P1BI 54
P1AI 55
sel-PD
GNDR 56
LDP2 57
P2AI 58
P2BI 59
P2CI 60
P2DI 61
GNDS 62
P2FP 63
P2FN 64
1 2
45 44 43 42 41 40
APC1
sel-RF
R-gain
Adjustment
F-gain
Adjustment
F-gain
Adjustment
sel-PD
sel-PD
T-gain
Adjustment
APC2
3 4 5 6 7
39 38
EQ
Generating
mode-IC
RF Ripple
sel-FE
Generating
FE
sel-TE
sel-DPD
Generating
DPDTE
sel-LVL
mode-TE
Generating
3BTE
BUS
8 9 10 11 12 13 14 15
37 36 35 34 33
FE-gain
Adjustment
TE-gain
Adjustment
LEVEL
Detection
Time Constant
Adjustment
16
32 DPDB
31 VccR
30 NC
29 NC
28 RFO
27 RPP
26 RPB
25 RPO
24 RPZ
23 VccS
22 DFTN
21 FEO
20 TEO
19 LVL
18 VccP
17 VCKF
23