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KDL-55HX827 19

The primary circuits contained in the AZ2-F chassis consists of a Main Board (designated as the BATL board), Power Supply Board (designated 

as the G6). The G7 is a converter circuit dedicated to providing power for the LED backlight control circuits. The remaining circuits are the 3D IR 

Emitter (HEM2 Board), the Wireless LAN Card, the Switch Unit, the IR Board (HLT2 Board), a Camera Module, and the LCD Panel assembly. 
NOTE: For connector part number information, refer to 

. For Wire Dressing information, refer to 

.

SWITCH

UNIT

CAMERA MODULE

HEM2

TCON

G7

G6

BATL

WIRELESS

LAN CARD

HLT2

KDL-55HX827 20

 provides an 

overview of the AZ2-F chassis. The following are descriptions of the 

boards and their functions.

Common to all models the Main Board, designated as the BATL 

Board, contains the TV control, video, and audio processing circuitry. 

All these functions are accomplished using the X-Reality Processor 

IC9000. 

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).

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: 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 

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

The audio amplifier (IC4601) amplifies the digital audio output of the 

X-Reality processor and sends it to the speakers.

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-55HX827 21

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:

 

● G6 (55”)

 

● G7 (55”)
 

Note: The G7 Board s a converter circuit dedicated to 

providing B+ for the LD (LED Drive) board to control the 

groups of LED backlighting

There are 3 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 an regulated 24V source 

for the LED power supply circuits.
Converter: The G6 Board does not contain an integrated converter. It 

supplies PFC 395VDC to the G7 board where a dedicated converter 

generates the B+ for the LD Board.

The 55” models utilize a separate converter circuit G7 due to the 

increased current requirements of the larger panel.

Designated as the HEM2 Board, this board is the internal 3D IR 

Emitter to synchronize the 3D shutter glasses.

The wireless transmit/receive circuits are located on this board to 

communicate with a wireless network.

This board contains the power, channel, and volume up/down and 

menu buttons. 

A USB camera is located on the front bezel below the Sony logo. 

Special software is located inside IC9000 to use the camera for 

power and picture control management. Face recognition software 

can determine whether someone is viewing the television. The 

number of people, distance from the TV, location from center, and 

whether the person(s) are looking at the television provides data to 

control the picture brightness and contrast. A lack of face recognition 

(no one viewing the television) can also be used to turn off the 

backlights, and, eventually turn the TV off for power savings.

Designated as the HLT2 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.

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The LCD Panel Assembly includes the LCD Panel, TCON Board, 

and LED Backlight system.
NOTE: The LD Board is not always included with the LCD Panel. 

Check with the LCD Panel manual for the most update information 

regarding this board.
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 TCON 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.

1.  LCD Panel

2.  LED Backlighting Components (varies)

3.  TCON Board

4.  LD Board (for some models)

The TCON Board communicates between the LCD Panel and the 

microprocessor on the Main Board. (NOTE: The TCON Board is not 

available as a replacement part for all models.)