Sony KDL-32EX425 / KDL-46EX525 Service Manual ▷ View online
KDL-32EX425/46EX525 15
OVERVIEW
The primary circuits contained in the AZ2-F chassis for the consists of a Main Board (designated as the BATV board), Power Supply Board
(designated as the GE2A Board for the 32” model and GE3A Board for the 46” model), the Motion Sensor (HMS3 Board), the IR Board (HLR2
Board), the Switch Unit, and the LCD Panel assembly.
NOTE: For connector part number information, refer to
NOTE: For connector part number information, refer to
“Connectors” on page 52
. For Wire Dressing information, refer to
“Wire Dressing” on page 54
.
SECTION 3 - CHASSIS OVERVIEW
SWITCH
UNIT
HLR2
HMS3
GE2A
TCON
BATV
FIGURE 3-1. BOARD LAYOUT FOR KDL-32EX425
SWITCH
UNIT
HLR2
HMS3
GE3A
TCON
BATV
FIGURE 3-2. BOARD LAYOUT FOR KDL-46EX525
KDL-32EX425/46EX525 16
SECTION 3 - CHASSIS OVERVIEW
OVERALL CIRCUIT DESCRIPTION
“Figure 3-5. Overall Block Diagram” on page 28
provides an overview
of the AZ2-F chassis. Below is a description of the components 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.
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: The customer can select the HDMI1,
HDMI2, HDMI3, HDMI4 input. Each HDMI input contains a common
EDI NVM (not shown) 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 T-CON 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-32EX425/46EX525 17
SECTION 3 - CHASSIS OVERVIEW
POWER SUPPLY
There are 2 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 regulated 24V source
for the LED power supply circuits.
SWITCH UNIT
This board contains the power, channel, and volume up/down and
menu buttons.
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.
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.
LCD PANEL ASSEMBLY
The LCD Panel Assembly includes the LCD Panel, T-CON 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.
The T-CON performs all the control, timing, charge, and discharge
The T-CON performs all the control, timing, charge, and discharge
functions driving the operation of the LCD Panel.
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
3. T-CON Board
T-CON BOARD
The T-CON Board communicates between the LCD Panel and the
microprocessor on the Main Board. (NOTE: The T-CON Board is not
available as a replacement part for all models.)
KDL-32EX425/46EX525
18
SECTION 3 - CHASSIS OVERVIEW
DIAGRAMS
BLOCK DIAGRAMS
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
Switch Unit
LEDs
IR Sensor
Light Level
HLR2
Power
GE2A Board (32")
GE3A Board (46")
LCD Panel
R
L
RF Input
Component/Composite
Composite
PC Input
4 HDMI Inputs
Optical Digital Audio Output
LED
Backlight System
TCON/HFR
(120Hz)
AC
Input
2 USB 2.0
Motion Sensor
RJ45 Ethernet
HMS3
Headphone/Analog Audio Output
Power +
Power -
Power -
Main Power Supply
Standby Power Supply
AC Relay
AC Relay
Power Key
Function Keys
Function Keys
Power
FIGURE 3-5. OVERALL BLOCK DIAGRAM
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