Sony dvp-s530d User Manual
75
A/V Processing
There are three major ICs in the combined A/V processing chain; two
buffers in the following video chain and nine ICs in the final audio chain:
buffers in the following video chain and nine ICs in the final audio chain:
A/V Processing ICs
Combined A/V
Video
Audio
RF Amp IC001
Video Buffers IC303
DSP IC501
ARP2 IC303
Video Buffers IC321
2Ch D/A Conv. IC902
A/V Decoder
Front Ch D/A Conv. IC902
Rear Ch D/A Conv. IC902
Center/Woofer D/A
Converter IC907
Converter IC907
Amplifiers IC431, IC502,
IC541 and IC571
IC541 and IC571
Once the servos begin operation, there is RF output from the optical de-
vice in the base unit. These ICs process the RF output:
vice in the base unit. These ICs process the RF output:
RF Amp IC001
Purpose:
Amplifies and matrixes the A-D input signals from the optical assembly to
produce RF, FE, PI outputs. Matrixes the E-H input signals to produce
TE (and TZC).
produce RF, FE, PI outputs. Matrixes the E-H input signals to produce
TE (and TZC).
Outputs:
·
RF signal for A/V and spindle motor processing
·
FE,TE, PI signals for servo control
ARP2 IC303
Purpose:
·
Asymmetrical correction – Active circuit for AC coupling the input RF
signal. Shapes sine input signal into a square wave.
signal. Shapes sine input signal into a square wave.
·
Sync clock extraction – Bit clock (PLL) made from the disc data.
·
EFM and De-Interleaving – First level of descrambling the data pieces
using external memory IC304 (Reed – Solomon Code).
using external memory IC304 (Reed – Solomon Code).
Outputs:
DVD Output Signals from IC303
Name
From IC
Purpose
When present
SD 0-7
disc
data
disc
data
IC303/pins
97, 98, 100-
105.
97, 98, 100-
105.
A/V disc data
DVD PB only
XSHD
IC303/pin 93
0.25usec low going pulse
to mark the beginning of
the DVD data
to mark the beginning of
the DVD data
DVD PB only
XSRQ
IC401/pin 51
Used as a busy line
DVD PB only
XSAK
IC303/pin 95
Data Acknowledgement
DVD PB only
SDCK
IC303/pin 91
Bit clock
Power on
CD Output Signals from IC303
Name
From IC303
Purpose
When present
Data
Pin 107
CD data
Power on
D Out (data)
Pin 110
CD data
CD PB only
B Clk
Pin 108
Bit clock
Power on
L/R Clock
Pin 109
Left/right clock
Power on
The following waveforms show the two CD data outputs (Ch 1 and Ch 3)
from ARP2 IC303 accompanied by the left / right clock (Ch 2).
from ARP2 IC303 accompanied by the left / right clock (Ch 2).
P M 3 3 9 4 , F L U K E & P H I L I P S
ch3
ch2
ch1
ch1: freq= 927kHz
CH1!5.00 V=
CH2!5.00 V=
CH3!5.00 V= ALT MTB2.00us- 2.00dv ch1+
1
2
3
T
CD Data Output Waveforms – CD PB
Name
Location
Voltage/div
Channel 1
CD Data
IC303/pin 107
5Vp-p
Channel 2
L/R Clock
IC303/pin 109
5Vp-p
Channel 3
CD D Out (data)
IC303/pin 110
5Vp-p
Time base
2usec/div.