Sony KDS-R60XBR1 - 60" Rear Projection TV, Руководство по обучению, Страница: 97 / 122

TVP-21 94
6. Audio Processing System
Overall System Description
Reference Figures 6-1
All audio inputs are routed through IC507 (Analog Audio Switch) on the
ASU-Board. The only audio inputs not applied directly to the ASU-Board
and IC507 are as follows.
• Audio Input 2
• NTSC Tuner
• ATSC Tuner
• Memory Stick
• i-Link
• HDMI or DVI
Audio Input 2 is first applied to the H3- Board and then to the ASU-Board
and IC507.
The NTSC and ATSC tuners are located in the Q-Box module. Notice
that the ATSC tuner audio passes through the NTSC tuner. The single
tuner audio output from the Q-Box module passes through the DSU-
Board before being applied to the ASU-Board and IC507.
Memory Stick and i-Link are also located in the Q-Box module. The
audio for these two sources is first applied to the ATI microprocessor, and
the single output is D/A (digital to analog) converter. The resulting analog
single passes through the DSU-Board before being applied to the ASU-
Board and IC507.
The analog switcher IC507 single output (analog audio single) is applied
to an A/D 9analog to digital) converter. The output digital signal is in
the SPDIF (Sony/Phillips Digital Interface). The ASU-Board sends the
SPDIF signal to the AK-Board.
IC2600 on the AK-Board performs the SPDIF to IIS conversion. The IIS
digital signal is a PCM type digital audio format.
The IIS single is then applied to the K-Board where the S-Master digital
audio amplifier system is located. IC3009 performs the IIS to PWM
conversion. The PWM signal is then applied to IC3005 where it is
amplifier before being applied to the Low-Pass output filter. The Low-
Pass filter converts the PWM signal into an analog audio signal, which is
finally applied to the speakers.