Overall Circuit Description; Main Board; Tuner; X-Reality Processor - Sony KDL-32EX729 Service Training Manual

OVERALL CIRCUIT DESCRIPTION

"Figure 3-4. Overall Block Diagram" on page 26
of the AZ2-F chassis. The following are descriptions of the boards
and their functions.

MAIN BOARD

Common to all models the Main Board, designated as the BATV
Board, contains the TV control, video, and audio processing circuitry.
All these functions are accomplished using the X-Reality Processor
IC9000.

TUNER

The tuner is a combination ATSC/NTSC unit. It can receive traditional
analog NTSC signals via cable or terrestrial along with ATSC digital
signals via terrestrial (8VSB) or cable (64 or 256 QAM).

X-REALITY PROCESSOR

IC9000 performs the majority of the necessary audio and video
processing on the main board.
TV Microprocessor: The CPU internal to the X-Reality processor
controls all aspects of the television functions. Input from the user
along with monitoring of critical circuits is also performed by this
CPU.
Digital Audio and Video Decoder: The MPEG2 and Digital Dolby
audio streams are received from the tuner for decompression. All
video sources which are not native 1920 X 1080p 60HZ are scaled to
this resolution. Digital audio content is output to the class D amplifier
for processing and amplification.
KDL-32EX729/40EX729/46EX729
SECTION 3 - CHASSIS OVERVIEW
HDMI Input and Switching: HDMI inputs are switched through
IC5500. Each HDMI input contains a common EDID NVM (internal to
IC5500) to provide display information data to any device connected
provides an overview
via the HDMI inputs.
LVDS Transmitter: Integrated into IC9000 is a Low Voltage
Differential Signaling (LVDS) transmitter. This circuit converts
the 8-bit parallel RGB video information into a set of high speed
serial lines for noise-free transmission to the TCON circuits located
internally to the LCD panel.
Scan Converter: Signal processing circuit that performs resolution
conversion (aspect ratio) and interlaced to progressive scan (IP)
conversion

AUDIO AMPLIFIER

The audio amplifier (IC4601) amplifies the digital audio output of the
X-Reality processor and sends it to the speakers.

TEMPERATURE SENSOR

The temperature sensor detects temperature conditions on the
Main Board, LCD Panel, or ambient room temperature. The IC
sends temperature data to the microprocessor. The microprocessor
decides when to shut the unit down depending on temperature level.
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