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KDL-32EX421/32EX423/32EX520/32EX521/32EX523/40EX520/40EX521/40EX523/46EX520/46EX521/46EX523 23
SECTION 3 - CHASSIS OVERVIEW
OVERALL CIRCUIT DESCRIPTION
“Figure 3-4. Overall Block Diagram” on page 26
provides an
overview 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
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
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.
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
via the HDMI inputs.
LVDS Transmitter: Integrated into IC9000 is a Low Voltage
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
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 over-temperature conditions on the
Main Board, LCD Panel, or ambient room temperature and sends
the shutdown signal to the processor.
KDL-32EX421/32EX423/32EX520/32EX521/32EX523/40EX520/40EX521/40EX523/46EX520/46EX521/46EX523 24
SECTION 3 - CHASSIS OVERVIEW
POWER SUPPLY BOARD
There are different Power Supply Boards used in the models in this
manual. The type of board depends on the size of LCD panel. They
are:
● GE2 Board (32”)
● GE3 Board (40”)
● GE3 Board (46”)
There are 3 distinct sections on the power supply:
Standby Supply: Continuously operational as long as AC power is
Standby Supply: Continuously operational as long as AC power is
applied, the standby supply generates 3.3V for the circuits requiring
power while the unit is turned off. An unregulated 19V line is present
to provide power to the main relay, PFC and main power supply at
turn-on.
Main Supply: Once the power supply receives a power-on command
Main Supply: Once the power supply receives a power-on command
from the CPU on the Main Board, the main switching supply is turned
on to provide a regulated 12V source and an unregulated 24V source
for the LED power supply circuits.
LED-Backlight Supply: This power supply develops the positive
LED-Backlight Supply: This power supply develops the positive
and negative LED backlight drive voltages. For the 40” models the
positive supply is +109V and the negative supply will be -61V to
-82V.
SWITCH UNIT BOARD
This board contains the power, channel, and volume up/down and
menu buttons.
IR BOARD
Designated as the HLR2 Board, the IR Board contains the power,
standby, and timer LED’s are located on this board along with the IR
remote receiver and light level sensor.
MOTION SENSOR BOARD
Designated as the HMS3 Board, the Motion Sensor Board contains
the circuits for the Motion Sensor. The Motion Sensor detects when
there is movement in front of the TV. If there is no movement in
front of the TV after a predetermine amount of time the backlight is
turned off (audio present). After an extended period of time the TV is
completely turned off.
WIFI BOARD
Only included in the EX423 & EX523 models, this board contains the
Wireless (RF) Network Circuits. The wireless TV circuits are used to
connect to a wireless network.
KDL-32EX421/32EX423/32EX520/32EX521/32EX523/40EX520/40EX521/40EX523/46EX520/46EX521/46EX523 25
SECTION 3 - CHASSIS OVERVIEW
LCD PANEL ASSEMBLY
The LCD Panel Assembly includes the LCD Panel, TCON Board,
and LED Backlight system.
The LCD Panel contains the actual liquid crystals, color filters, and
The LCD Panel contains the actual liquid crystals, color filters, and
polarizers. The liquid crystals are manipulated by the applied voltage
to pass a specific amount of light - from the backlight- depending on
the level of voltage applied.
A new LCD Panel assembly from parts will include the following
A new LCD Panel assembly from parts will include the following
items.
1. LCD Panel
2. LED Backlighting Components (varies)
3. TCON Board
TCON Board
The TCON Board communicates between the LCD Panel and the
microprocessor on the Main Board. The TCON performs all the
control, timing, charge, and discharge functions driving the operation
of the LCD Panel. (NOTE: The TCON Board is not available as a
replacement part for all models).
KDL-32EX421/32EX423/32EX520/32EX521/32EX523/40EX520/40EX521/40EX523/46EX520/46EX521/46EX523 26
SECTION 3 - CHASSIS OVERVIEW
BATV
X-Reality Processor
TV Microprocessor
Video Processing
HDMI Processing
HDCP Processing
IP (Image Processor)
Scan Converter (Scalar)
Audio Processing
Video Switcher
HDMI Switcher
ATSC/NTSC Tuner
Temperature Sensor
Audio Output Amplifier
Control
LVDS
Keys
Power/SIRCS
LCD Panel Assembly
LCD PANEL
Power Key
Function Keys
Switch Unit
LEDs
IR Sensor
Light Level
HLR2
Power
Main Power Supply
Standby Power Supply
AC Relay
LED Backlight Power Supplies
GE2 (32")
GE3 (40", 46")
LCD Panel
R
L
RF Input
Component/Composite
Composite
PC Input
4 HDMI Inputs
Optical Digital Audio Output
LED
Backlight System
TCON
(60Hz)
AC
Input
2 USB 2.0
Motion Sensor
RJ45 Ethernet
HMS3
Headphone/Analog Audio Output
Wireless LAN
(EX423/523 Models Only)
WIFI
Power +
Power -
FIGURE 3-4. OVERALL BLOCK DIAGRAM
DIAGRAMS
BLOCK DIAGRAMS
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