Samsung SV-DVD50, Service Manual

Page: 147 / 226

Circuit Operating Descriptions
7-45
7-13 DVD RF
(1) RIC1 (S5L1463)
S5L1463 is combined with S5L1455 as bipolar IC developed for DVD SERVO system.
Main features include DVD waveform equalizing, CD waveform equalizing, focus error signal generation, 3-beam
tracking error signal generation, DPD 1-beam tracking error, defect, envelope, MIRR output, Laser Power Control,
etc.
(a) Basic Potentiometer
S5L1463 Uses 5V/3.3V and reference voltage is 2.5V.
V (Pin 19, 32, 45, 49, 58-) terminal is needed for IC, which uses the peripheral V.
(b) RF signal
Fig. 7-42 shows the flow of signal generated by the pick-up.
A, B, C, D signals detected from pick-up are converted in to RF signal(A+B+C+D) via RF summing AMP.
PICK-UP
RE SUM
& AGC
RF EQ
DPD
TE
Mux
ENV
FOK
DEFECT
TESEL
TE
GCA
GCA
ALPC
MIRR
#
$
%
@
)
1
2
3
6
7
104
104
104
104
z Z L
105
104
RFAGCO EQIN
MIRRI
[
'
q
E
e
=
o
r
Y
O
MIRR
TE
RFEQO
A
A
B
C
D
B
C
D
E F LDDVD
LDDVD
PDDVD
PDDVD
LDCD
LDCD
PDCD
PDCD
9
0
“
‘
ABCD
FE
DFCT1
PLLDFT
FOKB
ENV
103
ABCDI
Fig. 7-42
Fig. 7-43 shows the waveform-equalizing block diagram for the RF signal.
It outputs to EQout (Pin 70) terminal by initially changing switching AMP gain of DVD and CD, and then adjust-
ing the level in RF SUM & AGC.
RF SUM and AGC is Contvolled by PWM Signal and pin 78~80.
EQout Pin is Connected EQin.