Sony DVP S530D Training Manual page 82

These waveforms were taken with the player turned on and no disc in-
serted. They show that the CD DOut data signal (ch 2) from IC303/pin
110 is fixed to half of the bit clock frequency (ch 1).
PM3394, FLUKE & PHILIPS
ch2:dc = 1.84 V, rms = 2.47 V
ch1
pkpk= 4.25 V, freq= 1.41MHz
T
ch2
1
ch3
2
3
CH1!5.00 V=
CH2!5.00 V=
CH3!5.00 V= ALT MTB 250ns- 2.00dv ch1+
CD Output – Power ON only (no PB)
Name
Channel 1 Bit Clock
Channel 2 CD DOut (data)
Time base
A/V Decoder IC401
Purpose
· MPEG decompression using the external IC402 and IC403 memo-
ries.
· Crops the 16x9 image for a 4x3 TV picture (software dependent).
· Communicates with IC202 with servo control changes to get info at
different parts of the disc.
· On screen display graphics.
· D/A Converter (analog video output).
· Generates MacroVision copyguard signals when instructed.
· MPEG audio decompression
· Dolby Digital AC-3 decompression using external SRAM IC402 / IC403
Outputs:
· 6 Analog Video channel Outputs (Y, B-Y, R-Y, Composite, Y, C)
· 6 channels of Dolby Digital (AC-3) audio with clock signal support.
Location Voltage/div
IC303/pin 108 5Vp-p
IC303/pin 110 5Vp-p
0.25usec/div.
Video
Audio
77
Flash ROM IC205
Contains fixed data about how this DVD player should store, retrieve and
process information. SYSCON IC202 processes this information. Some
of the information processed is as follows::
· Some variables in the MEPEG Video and AC-3 Audio processing
· What ICs to check during start up
· Stores the power ON DVD Sony logo
· Test mode overall operation (servo data is in IC201)
· Color bars used in the test mode (main picture)
· Menu languages and characters