Sony KDL-40NX720 / KDL-46NX720 / KDL-55NX720 / KDL-60NX720 Service Manual ▷ View online
KDL-40NX720/46NX720/55NX720/60NX720 23
OVERVIEW
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 G4 for the 40” models, G5 for the 46” models, G6 for the 55” and 60” models, and the G7 used only in the 55” and 60” models), the 3D
IR Emitter (HEM2 Board), Wireless LAN Card, the Switch Unit, the IR Board (HLT2 Board), and the LCD Panel assembly.
NOTE: For connector part number information, refer to
NOTE: For connector part number information, refer to
“Connectors” on page 57
. For Wire Dressing information, refer to
“Wire Dressing” on page
61
.
SWITCH
UNIT
CAMERA MODULE
HEM2
HLT2
TCON
LD
G4
BATL
WIRELESS
LAN CARD
FIGURE 3-1. BOARD LAYOUT FOR KDL-40NX720 ONLY
SECTION 3 - CHASSIS OVERVIEW
KDL-40NX720/46NX720/55NX720/60NX720 24
SECTION 3 - CHASSIS OVERVIEW
SWITCH
UNIT
CAMERA MODULE
HEM2
HLT2
TCON
G5
BATL
WIRELESS
LAN CARD
FIGURE 3-2. BOARD LAYOUT FOR KDL-46NX720 ONLY
SWITCH
UNIT
CAMERA MODULE
HEM2
HLT2
TCON
G7
G6
BATL
WIRELESS
LAN CARD
FIGURE 3-3. BOARD LAYOUT FOR KDL-55NX720 ONLY
KDL-40NX720/46NX720/55NX720/60NX720 25
SECTION 3 - CHASSIS OVERVIEW
SWITCH
UNIT
CAMERA MODULE
HEM2
HLT2
TCON
G7
G6
BATL
WIRELESS
LAN CARD
FIGURE 3-4. BOARD LAYOUT FOR KDL-60NX720 ONLY
KDL-40NX720/46NX720/55NX720/60NX720 26
SECTION 3 - CHASSIS OVERVIEW
OVERALL CIRCUIT DESCRIPTION
“Figure 3-5. Overall Block Diagram” on page 29
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 BATL
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.
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