Sony S530D manual Processing, RF Amp IC001

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	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
		Amplifiers IC431, IC502,
		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:

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).

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Outputs:

DVD Output Signals from IC303

Name	From IC	Purpose	When present
SD 0-7	IC303/pins	A/V disc data	DVD PB only
disc	97, 98, 100-
data	105.
XSHD	IC303/pin 93	0.25usec low going pulse	DVD PB only
		to mark the beginning of
		the DVD data
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).

PM3394, FLUKE & PHILIPS

ch1: freq= 927kHz

ch1

ch2	T
	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	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.