Sony KDL-40EX620 / KDL-40EX621 / KDL-46EX620 / KDL-46EX621 / KDL-55EX620 / KDL-55EX621 Service Manual ▷ View online
KDL-40EX620/40EX621/46EX620/46EX621/55EX620/55EX621 19
SECTION 2 - SOFTWARE REQUIREMENTS
SOFTWARE UPDATE RESPONSIBILITY
Software updates are designed to be performed by the customer.
Warranty repairs in which the issue can be resolved by a software
update
are not reimbursable. Most issues involving software
updates are handled by the customer service center and should not
be directed to an authorized service center. It is the responsibility
of the servicer to prevent service calls for issues that involve
software updates. Exceptions to this are certain cases whereby the
customer is unable or unwilling to perform the task. In this situation,
the servicer will be notified and receive the proper authorization for
reimbursement.
It is the servicer’s responsibility, however, to
It is the servicer’s responsibility, however, to
make certain that any
TV requiring a legitimate service is running the latest software
version and to install it if necessary.
version and to install it if necessary.
CHECKING THE SOFTWARE VERSION
The easiest way to check the version of software that is currently on
the TV is to access the Contact Sony screen by using the customer
menu.
FIGURE 2-1. EXAMPLE OF SOFTWARE VERSION
LOCATED ON THE CONTACT SONY SCREEN
EXAMPLES OF SOFTWARE CORRECTABLE
SYMPTOMS
Always check the Sony Authorized Servicer Portal at
http://www.
sony.com/asp
site for any known and/or listed issues that are
software related. Most symptoms that are correctable by software
updates involve communications issues with other devices or minor
glitches in the operation of a specific function. Below is a list of some
of the symptoms that may be corrected with a software update:
● Fluctuations in picture brightness
● Intermittent picture freezing or noise
● Problems with certain inputs (especially HDMI)
● Intermittent or distorted audio
● Erratic remote control operation
● Unit turns on and off by itself
● Loss of color
● Internet connectivity
● Certain features not working correctly
(photo or video file viewing)
KDL-40EX620/40EX621/46EX620/46EX621/55EX620/55EX621 20
OVERVIEW
The primary circuits contained in the AZ2-F chassis consists of a Main Board (designated as the BATV Board), Power Supply Board (designated
as the G4 Board for the 40” models, G5 Board for the 46” models, and G6 Board and G8 Board for the 55” models), the Motion Sensor
(HMS3 Board), the IR Board (HLR2 Board), the Switch Unit, and the LCD Panel Assembly which contains the TCON Board.
NOTE: For connector part number information, refer to
“Connectors” on page 61
. For Wire Dressing information, refer to
“Wire Dressing” on page 63
.
SWITCH
UNIT
HLR2
HMS3
TCON
LD
G4
BATV
NOTE: The LD Board is not included with the LCD Panel
FIGURE 3-1. BOARD LAYOUT FOR KDL-40EX620/40EX621 ONLY
SECTION 3 - CHASSIS OVERVIEW
KDL-40EX620/40EX621/46EX620/46EX621/55EX620/55EX621 21
SECTION 3 - CHASSIS OVERVIEW
SWITCH
UNIT
HLR2
HMS3
TCON
LD
G5
BATV
NOTE: The LD Board is not included with the LCD Panel
FIGURE 3-2. BOARD LAYOUT FOR KDL-46EX620/46EX621 ONLY
SWITCH
UNIT
HLR2
HMS3
TCON
LD
G6
G8
BATV
NOTE: The LD Board is not included with the LCD Panel
FIGURE 3-3. BOARD LAYOUT FOR KDL-55EX620/55EX621 ONLY
KDL-40EX620/40EX621/46EX620/46EX621/55EX620/55EX621 22
SECTION 3 - CHASSIS OVERVIEW
OVERALL CIRCUIT DESCRIPTION
“Figure 3-5. Overall Block Diagram” on page 25
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.
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 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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