Monday, October 27, 2014

LCD DIGITAL LCD TV - SONY KDL-32EX725_40EX725_55EX725 - Circuit Boards layout and Functions

Sony KDL-32EX725_40EX725_55EX725 – LCD DIGITAL TV _ Boards layout to different models to this LCD TV & the function details
Universal Remote Control Set-up Code list [With different brand remote controls to Sony TVs]
SPECS: General
Television system:
Analog: NTSC 3.58/ PAL-M / PAL-N
Digital: SBTVD
Channel coverage:
VHF: 2-13, UHF: 14-69
CATV (Analog): 1-135
COMPONENT IN
YPBPR(Component Video)
Signal format: 480i, 480p, 576i, 576p,720p, 1080i, 1080p
AUDIO
HDMI IN 1/2/3/4
HDMI: Video: 480i, 480p, 576i, 576p, 720p, 720/24p/30p, 1080i, 1080p, 1080/24p/30p
HDMI: Audio: Two channel linear PCM 32, 44.1 and 48 kHz, 16, 20 and 24 bits, Dolby Digital
Analog audio input (minijack) (HDMI IN 4 only)
ARC (Audio Return Channel) (HDMI IN 1 only)
Speaker output: 10 W + 10 W
CIRCUIT BOARDS' LAYOUT AND FUNCTIONS DETAILS
  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 G10A Board for the 32” models, G4B Board for the 40” models, and G6A Board and G8A Board for the 55” models), the Motion Sensor (HMS3 Board), the IR Board (HLR2 Board), the Switch Unit, and the LCD Panel assembly.
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)
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 shut-down signal to the processor.
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.
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 Differential Signalling (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 conversion (aspect ratio) and interlaced to Progressive scan (IP) conversion.
POWER SUPPLY
  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:
G10A-Board (32”)
G4B-Board (40”)
G6A-Board (55”)
Note: the G8A in the 55” models is the Power Supply Board for the Panel LED backlight system.  There are 2 distinct sections on the power supply:
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 from the CPU on the Main Board, the main switching supply is turned on to provide a regulated 12V source and a regulated 24V source for the LED power supply circuits.
POWER SUPPLY FOR BACKLIGHT SYSTEM
  The G8A-Board is the Power Supply Board for the Panel LED backlighting system (including the LED Driver Board) for the 55” model only. 390V, 19V, and 12V are applied to the board from the G6A Board to develop the 24V. The 24V is applied to the LD Driver board.
LD BOARD (LED DRIVER BOARD)
  The LED Driver Board is controlled by the T-CON/HFR Board to perform overall backlight power-on, backlight level, and local dimming  functions. This board takes the 24V from the Power Supply Board (or G8A Board for the 55” models) and develops the negative and positive voltages to directly drive the LEDs in the panel assembly.
3D IR EMITTER
Designated as the HEM2 Board, this board is the internal 3D IR Emitter.
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 back-light 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.
NOTE: The LD Board is not included with the LCD Panel.   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 functions driving the operation of the LCD Panel.  A new LCD Panel assembly from parts will include the following items.
LCD Panel
LED Backlighting Components
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.)
UNIVERSAL REMOTE CONTROL SET-UP CODE LIST
0018 0045 0101 0131 0154 0177 0211 0301 0302 0357 0358 0609 0785