A/V Processing - Sony DVP S530D Training Manual

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:
A/V Processing ICs
Combined A/V Video
RF Amp IC001 Video Buffers IC303
ARP2 IC303 Video Buffers IC321
A/V Decoder
Once the servos begin operation, there is RF output from the optical de-
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).
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.
· 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).
Audio
DSP IC501
2Ch D/A Conv. IC902
Front Ch D/A Conv. IC902
Rear Ch D/A Conv. IC902
Center/Woofer D/A
Converter IC907
Amplifiers IC431, IC502,
IC541 and IC571
75
Outputs:
DVD Output Signals from IC303
Name From IC
SD 0-7 IC303/pins
disc 97, 98, 100-
data 105.
XSHD IC303/pin 93
XSRQ IC401/pin 51
XSAK IC303/pin 95
SDCK IC303/pin 91
CD Output Signals from IC303
Name From IC303
Data Pin 107
D Out (data) Pin 110
B Clk Pin 108
L/R Clock Pin 109
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).
PM3394, FLUKE & PHILIPS
ch1: freq= 927kHz
ch1
T
ch2
1
ch3
2
3
CH1!5.00 V=
CH2!5.00 V=
CH3!5.00 V= ALT MTB2.00us- 2.00dv ch1+
CD Data Output Waveforms – CD PB
Name
Channel 1 CD Data
Channel 2 L/R Clock
Channel 3 CD D Out (data)
Time base
Purpose When present
A/V disc data DVD PB only
0.25usec low going pulse DVD PB only
to mark the beginning of
the DVD data
Used as a busy line DVD PB only
Data Acknowledgement DVD PB only
Bit clock Power on
Purpose When present
CD data Power on
CD data CD PB only
Bit clock Power on
Left/right clock Power on
Location
IC303/pin 107
IC303/pin 109
IC303/pin 110
2usec/div.
Voltage/div
5Vp-p
5Vp-p
5Vp-p