Sony Bravia KDL-32EX725 User manual

SERVICE MANUAL
LCD Digital Color TV
AZ2-F Chassis
Segment: 3a-2
9-888-405-01
Version Date Subject
1.0 2/16/2011 No revisions or updates are applicable at this time.
ORIGINAL MANUAL ISSUE DATE: 2/2011
HISTORYINFORMATIONFORTHEFOLLOWINGMANUAL:

SERVICE MANUAL
LCD Digital Color TV
AZ2-F Chassis
Segment: 3a-2
9-888-405-01
Self Diagnosis
Supported model
KDL-40EX725

MODELLIST
MODEL COMMANDER DESTINATION MODEL COMMANDER DESTINATION
KDL-32EX725 RM-YD062 CHILE/PERU
KDL-32EX725 RM-YD062 VENEZUELA
KDL-40EX725 RM-YD062 CHILE/PERU
KDL-40EX725 RM-YD062 VENEZUELA
KDL-55EX725 RM-YD062 CHILE/PERU
KDL-55EX725 RM-YD062 VENEZUELA
9-888-405-01

KDL-32EX725/40EX725/55EX725 i
TABLEOFCONTENTS
Section 1 - Safety and Features.................................................1
Warnings and Cautions ..............................................................1
Handling the FFC Connector .....................................................3
Safety-Related Warnings ...........................................................4
Safety Check-Out .......................................................................5
Self Diagnosis Function .............................................................7
Overview ....................................................................................8
Features .....................................................................................8
See It All in 3D ............................................................................. 8
MotionFlow™ XR 240 ................................................................. 8
Navigation Made Easy ................................................................ 8
LightSensor™ Technology .......................................................... 8
X-Reality™ Engine ...................................................................... 8
Presence Sensor ......................................................................... 9
USB Photos, Videos & Music ...................................................... 9
Edge LED Backlighting ................................................................ 9
Internet Streaming & Connectivity ............................................... 9
Faster Start-Up ............................................................................ 9
BRAVIA® Sync™ Compatible ..................................................... 9
Specications ...........................................................................10
Section 2 - Software Requirements.........................................12
Overview ..................................................................................12
Software Updates for Customers .............................................12
Software Updates for Servicers ...............................................13
Software Update Responsibility ............................................... 13
Checking the Software Version ................................................. 14
Examples of Software Correctable Symptoms .......................... 14
Section 3 - Chassis Overview ..................................................15
Overview ..................................................................................15
Overall Circuit Description ........................................................17
Main Board ...............................................................................17
Tuner ......................................................................................... 17
X-Reality Processor ................................................................... 17
Audio Amplier .......................................................................... 17
Temperature Sensor .................................................................. 17
Power Supply ...........................................................................18
Power Supply for Backlight System .........................................18
LD Board (LED Driver Board) ..................................................18
3D IR Emitter ............................................................................18
Switch Unit ...............................................................................18
Motion Sensor Board ...............................................................18
IR Board ...................................................................................18
LCD Panel Assembly ...............................................................19
T-CON Board ............................................................................. 19
Diagrams ..................................................................................20
Block Diagram ........................................................................... 20
Connector Diagrams ................................................................. 22

KDL-32EX725/40EX725/55EX725 ii
TABLE OF CONTENTS
Section 4 - Troubleshooting .....................................................28
Overview ..................................................................................28
Updating the Software ............................................................... 28
Triage Chart .............................................................................29
Protection Shutdown ................................................................30
Standby LED Flash Count ......................................................... 30
Diagnostic Code Descriptions ..................................................34
Viewing the Self Check Diagnostic History ............................... 35
Section 5 - Flow Charts and Diagrams ...................................36
Overview ..................................................................................36
No Power ................................................................................... 37
Standby LED Blinking ................................................................ 39
No Picture/No Sound ................................................................. 45
TV/Remote Commander Buttons Not Working ......................... 48
Network Not Connecting .......................................................... 50
3D Does not Display .................................................................. 52
Skype Accessory Not Working .................................................. 53
Section 6 - Disassembly/Part Number Information ...............55
Table-Top Stand Assembly Removal ........................................55
Rear Cover and AC Cover Removal ........................................56
Switch Unit and Speakers Removal .........................................57
LD Board, HEM2 Board, HLR2 Board and
HMS3 Board Removal ........................................................58
G10A/G4B/G6A/G8A (Power Supply) Board and
BATV (Main) Board Removal .............................................59
KDL-32EX725/40EX725 Only ................................................... 59
KDL-55EX725 Only ................................................................... 60
Panel Brackets and LCD Panel Removal ................................61
Cleaning the LCD Panel ............................................................ 61
Screws .....................................................................................62
Connectors ...............................................................................62
KDL-32EX725 Only ................................................................... 62
KDL-40EX725 Only ................................................................... 63
KDL-55EX725 Only ................................................................... 63
Accessories and Packaging .....................................................64
Miscellaneous ..........................................................................64
Remote Commander ................................................................64
Wire Dressing ...........................................................................65
KDL-32EX725 Only ................................................................... 65
KDL-40EX725 Only ................................................................... 65
KDL-55EX725 Only ................................................................... 65
Section 7 - Service Adjustments .............................................66
Overview ..................................................................................66
Updating the Software ..............................................................66
Accessing Service Adjustment Mode .......................................66
Viewing or Changing Service Data ............................................ 67

KDL-32EX725/40EX725/55EX725 iii
TABLE OF CONTENTS
Verifying Service Adjustments ..................................................68
Verifying the Segment Code ...................................................... 68
Verifying the Destination ............................................................ 69
Verifying the Model Name ......................................................... 69
Optional Adjustments ...............................................................70
Setting White Balance Adjustments .......................................... 70
Resetting the TV to Factory Condition .....................................71
Resetting the TV to Factory Condition Using Service Mode ..... 71
Appendix A - Removing the Rear Cover ............................... A-1
Removing the Power Cord from the Rear Cover ................... A-1
KDL-32EX725 ..........................................................................A-1
KDL-40EX725 ..........................................................................A-3
Appendix B - Attaching the Rear Cover ................................ B-1
Reattaching the Rear Cover to the Bezel ............................... B-1
KDL-32EX725 ..........................................................................B-1
KDL-40EX725 ..........................................................................B-2
Appendix C - Replacing the LCD Panel ................................ C-1
Removing the LCD Panel from the Bezel .............................. C-1
Reattaching the LCD Panel onto the Bezel ............................C-2
Appendix D - Rear Cover Caution ......................................... D-1
Appendix E - Setup Guide ...................................................... E-1

KDL-32EX725/40EX725/55EX725 1
WARNINGS AND CAUTIONS
CAUTION
These servicing instructions are for use by qualied service personnel only. To reduce the risk of electric shock, do not perform any servicing other
than that contained in the operating instructions unless you are qualied to do so.
CARRYING THE TV
• Carry the TV with the adequate number of people; larger size TVs require two or more people.
• Correct hand placement while carrying the TV is very important for safety and to avoid damage.
• Disconnect all cables when carrying the TV.
WARNING!!
An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of this receiver is
directly connected to the AC power line.
! SAFETY-RELATED COMPONENT WARNING!!
Components identied by shading and ! mark on the exploded views are critical for safe operation.
Replace all components with Sony parts whose part numbers appear as shown in this manual or in supplements published by Sony. It is essential
that all critical parts be replaced only with the part number specied in this manual to prevent electric shock, re, or other hazard.
Circuit adjustments that are critical for safe operation are identied in this manual.
Follow these procedures whenever critical components are replaced or improper operation is suspected.
NOTE: Do not modify the original design without obtaining written permission from the manufacturer or you will void the original parts and labor
guarantee.
SECTION1-SAFETYANDFEATURES

KDL-32EX725/40EX725/55EX725 2
SECTION 1 - SAFETY AND FEATURES
CAUTION
W Do Not use paper towels, any type of abrasive pad, rags, rubber or vinyl materials to clean the screen. Using these materials could easily
scratch the screen which may result in permanent damage.
W Do Not use any cleaning product containing alkaline/acid cleaner, scouring powder, or volatile solvent, such as alcohol, ammonia,
benzene, thinner or insecticide. Using any of these harsh cleaners may result in permanent damage to the screen.
W Do Not spray water or detergent directly onto the TV screen . If liquid drips into the bottom of the screen it may cause a failure.
CLEANING THE LCD PANEL
CAUTION: When cleaning the TV, be sure to unplug the power cord to avoid any chance of electric shock.
Clean the cabinet of the TV with a dry soft cloth.
Wipe the LCD screen gently with a soft cloth.
R Stubborn stains may be removed with a cloth slightly moistened with a solution of mild soap and warm water.
R If using a chemically pretreated cloth, please follow the instruction provided on the package.
R Never use strong solvents such as a thinner, alcohol or benzine for cleaning.
R Periodic vacuuming of the ventilation openings is recommended to ensure to proper ventilation.

KDL-32EX725/40EX725/55EX725 3
SECTION 1 - SAFETY AND FEATURES
HANDLING THE FFC CONNECTOR
Use caution when you connecting or removing the FFC connector.
Remove the connector by the reinforcement tab only.
1. Holding onto the reinforcement tab,
insert the FFC connector into the connector slot.
1. Gently press down on the release tab of the connector slot.
2. Holding onto the reinforcement tab of the FFC connector,
pull out the connector while continuing to hold down
the release tab of the connector slot.
(See caution below.)
Use the
tab to
insert
connector.
2
Press down
Main Board
Main Board
CAUTION: The FFC connector can be inserted into the Main Board upside down.
If it is inserted upside down, the pins on the FFC connector
will short-circuit and damage the board.
Reinforcement tab shows Terminal side shows
Use the
tab to
remove
connector.
Inserted Correctly Inserted Incorrectly
Correct Incorrect
DISCONNECTING THE FFC CONNECTOR CONNECTING THE FFC CONNECTOR

KDL-32EX725/40EX725/55EX725 4
SECTION 1 - SAFETY AND FEATURES
SAFETY-RELATED WARNINGS
USE CAUTION WHEN HANDLING THE LCD PANEL
When repairing the LCD panel, be sure you are grounded by using a wrist band.
When installing the LCD panel on a wall, the LCD panel must be secured using the 4 mounting holes on the rear cover.
1. Do not press on the panel or frame edge to avoid the risk of electric shock.
2. Do not scratch or press on the panel with any sharp objects.
3. Do not leave the module in high temperatures or in areas of high humidity for an extended period of time.
4. Do not expose the LCD panel to direct sunlight.
5. Avoid contact with water. It may cause a short circuit within the module.
6. Disconnect the AC power when replacing the backlight or inverter circuit.
(High voltage occurs at the inverter circuit at 650Vrms.)
7. Always clean the LCD panel with a soft cloth material.
8. Use care when handling the wires or connectors of the inverter circuit. Damaging the wires may cause a short.
9. Protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).
10. During the repair, DO NOT leave the Power On for more than 1 hour while the TV is face down on a cloth.

KDL-32EX725/40EX725/55EX725 5
SECTION 1 - SAFETY AND FEATURES
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly soldered connections. Check the entire board surface for solder
splashes and bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or touching high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps, and mounting hardware have been replaced. Be absolutely
certain that you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out
to the customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and
recommend their replacement.
6. Check the line cords for cracks and abrasion. Recommend the replacement of any such line cord to the customer.
7. Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.

KDL-32EX725/40EX725/55EX725 6
SECTION 1 - SAFETY AND FEATURES
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and from all exposed
metal parts to any exposed metal part having a return to chassis, must not exceed
0.5 mA(500 microamperes). Leakage current can be measured by any one of three
methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instructions.
2. A battery-operated AC milliampmeter. The Data Precision 245 digital
multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so
analog meters must have an accurate low voltage scale.
4. The Simpson’s 250 and Sanwa SH-63TRD are examples of
passive VOMs that are suitable. Nearly all battery-operated digital
multimeters that have a 2 VAC range are suitable (see Figure A).
HOW TO FIND A GOOD EARTH GROUND
A cold-water pipe is a guaranteed earth ground; the cover-plate retaining screw on
most AC outlet boxes is also at earth ground.
If the retaining screw is to be used as your earth ground, verify that it is at ground
by measuring the resistance between it and a cold-water pipe with an ohmmeter.
The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60-to 100-watt trouble-light (not a
neon lamp) between the hot side of the receptacle and the retaining screw. Try both
slots, if necessary, to locate the hot side on the line; the lamp should light at normal
brilliance if the screw is at ground potential (see Figure B).
Trouble Light
AC Outlet Box Ohmmeter
Cold-water Pipe
Figure B. Checking for earth ground.
To Exposed Metal
Parts on Set
0.15 µF
Earth Ground
AC
Voltmete
r
(0.75V)
Figure A. Using an AC voltmeter to check AC leakage.

KDL-32EX725/40EX725/55EX725 7
SECTION 1 - SAFETY AND FEATURES
SELF DIAGNOSIS FUNCTION
The TVs in this manual contain a self-diagnostic function. If an error occurs, the standby LED will automatically begin to ash. The number of
times the LED ashes translates to a probable source of the problem. A denition of the standby LED ash indicator is listed in the Operating
Instruction manual for the user’s reference.
If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal
past problems and how often these problems occur.
For complete information, refer to “Section 4 - Troubleshooting” on page 28.
Self Diagnosis
Supported model

KDL-32EX725/40EX725/55EX725 8
SECTION 1 - SAFETY AND FEATURES
OVERVIEW
The AZ2-F chassis is one of several designs for the 2011 model line
of Sony Bravia® LCD televisions. This manual covers the following
models:
KDL-32EX725
KDL-40EX725
KDL-55EX725
FEATURES
Several new features are introduced in this chassis model lineup
along with some carryovers from the previous year.
SEE IT ALL IN 3D
Enjoy incredible depth and a sharp, Full HD 1080p picture from the
leader in 3D technology. (3D Active Glasses required, sold separately)
MOTIONFLOW™ XR 240
See smooth and precise detail during fast-action scenes. Sony’s
Motionow XR 240 technology for fast action movies and sports by
reducing blur caused by quick camera movements, enhancing image
sharpness, and overall creates a clearer picture.
NAVIGATION MADE EASY
Enjoy an easy-to-use menu that allows you to navigate additional
content or adjust the picture settings while watching your favorite
program.
LIGHTSENSOR™ TECHNOLOGY
Enjoy customized picture brightness and save energy without lifting
a nger. The built-in Light Sensor automatically adjusts the picture
brightness based on the amount of light in the room.
X-REALITY™ ENGINE
Enjoy a vivid, lifelike picture experience. Sony’s X-Reality engine
brings out the best by analyzing each scene so you see sharpened
images, and amazing contrast detail.

KDL-32EX725/40EX725/55EX725 9
SECTION 1 - SAFETY AND FEATURES
PRESENCE SENSOR
Save energy when you’re not around. The television’s built-in motion
sensor has the ability to scan the room and detect movement. If the
sensor detects no movement it automatically turns off the picture
leaving only sound. After more time and no movement, the TV turns
itself off minimizing any unnecessary power draw.
USB PHOTOS, VIDEOS & MUSIC
Share your photos on the big screen or listen to your favorite music.
Simply connect your digital camera, USB-enabled MP3 player, or
USB storage device directly to your HDTV’s USB input.
EDGE LED BACKLIGHTING
Experience the next level of picture quality and contrast with Sony’s
Edge LED Backlight technology. This technology sharpens image
contrast giving an amazingly crisp picture you can see. The ultra-thin
backlight system allows for a slimmer, sleeker design.
INTERNET STREAMING & CONNECTIVITY
Internet Streaming: Internet favorites now streaming on your
television. In addition to Qriocity™, watch hit movies with Netix®,
popular TV shows on Hulu Plus™ or user-generated video on
YouTube™. You can even listen to personalized music on Pandora®.
Enjoy the widest selection of internet content at your ngertips.
Skype™ Ready:Connect to friends and family all over the globe with
Internet voice and video calls using your TV. Make free video Skype-
to-Skype calls and low-cost Skype-to-phone calls with a Sony®
compact microphone/camera (required, sold separately).2
Wi-Fi® Ready:Going wireless is easy with the UWA-BR100 Wi-Fi®
adapter (sold separately). Just plug it in and get ready to stream
movies, photos, music and videos straight to your TV from the Internet
or your home network.
DLNA® Streaming:Access and share photos, videos and music on
your TV by streaming them from compatible DLNA® device like your
PC or Playstation®3 system.
FASTER START-UP
Quick Start & Viewing feature enables this Sony television to go from
‘OFF’ to ‘ON’ 2-3 times faster than previous Sony televisions.
BRAVIA® SYNC™ COMPATIBLE
Conveniently operate and control other BRAVIA® Sync™ compatible
devices - including BRAVIA® HDTVs, Blu-ray Disc™ Players,
surround sound systems, Handycam® camcorders and Cyber-shot®
digital still cameras, all with one remote control.

KDL-32EX725/40EX725/55EX725 10
SECTION 1 - SAFETY AND FEATURES
SPECIFICATIONS
System
Television system Analog: NTSC 3.58/ PAL-M / PAL-N
Digital: SBTVD
Channel coverage VHF: 2-13, UHF: 14-69
CATV (Analog): 1-135
Panel system LCD (Liquid Crystal Display) Panel
Speaker output 10 W + 10 W
Input/Output jacks
CABLE/ANTENNA 75-ohm external terminal for RF inputs
VIDEO IN 1/2 VIDEO / AUDIO
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)
AUDIO OUT/Headphones 500 mVrms (typical)
Stereo mini jack
DIGITAL AUDIO OUT
(OPTICAL)
PCM/Dolby Digital optical signal
BGR golana ,nip-51 bus-DNI CP
PC/HDMI 4 AUDIO IN Stereo mini jack
nnoC( rotcennoc XT-ESAB001/T-ESAB01NAL ection speed may differ depending on the
network environment. 10BASE-T/100BASE-TX communication rate and communication
quality are not guaranteed for this TV.)
.tamrof detroppus rof launaM-i eht ot refeRANLD/BSU
Optional accessories Connecting cables
Support Belt Kit
Wall-Mount Bracket: SU-WL500
3D Glasses:
TDG-BR250/TDG-BR200/TDG-BR100/TDG-BR50
USB Wireless LAN Adapter
Operating temperature 0 °C - 40 °C
80.1
31.5
(32 class)
)2( 001 × 03
002 × 002
Model name KDL- 55EX72x 40EX72x 32EX72x
Power and others
Power requirement 110-240 V AC, 50/60 Hz
Power consumption 166 W 110 W 90 W
in use
W 3.0 naht sseLybdnats ni
Screen size (cm)
(measured diagonally) (inches)
138.8
54.6
(55 class)
101.6
40
)lacitrev( senil 080,1 × )latnoziroh( stod 029,1 noituloser yalpsiD
Speaker
Full range (mm) 30 × 150 (2)
Dimensions with stand (mm) 1,269 × 799 ×
315
943 × 616 ×
250
943 × 604 ×
254
without stand (mm) 1,269 × 769 ×
41
943 × 586 ×
42
943 × 588 ×
45
wall-mount hole pattern
(mm)
300 × 300
wall-mount screw size
(mm) M6 (length: refer to Setup Guide.)
Mass with stand (kg) 25.4 14.4 10.4
without stand (kg) 20.2 11.2 7.9
Supplied accessories See “Checking the accessories”.
Checking the accessories
Remote control (1)*1
Size AAA batteries (2)
Table-Top Stand (1)*2
Fixing screws for Table-Top Stand
(M5 × 16) (3)
Assembling screws for Table-Top
Stand (M6 × 14) (4) (for KDL-55EX72x)
Assembling screws for Table-Top
Stand (M6 × 14) (3) (for KDL-40/32EX72x)
*1Please refer to the model name printed on the
remote control.
*2Assembling the Table-Top Stand is required.
Refer to the supplied Table-Top Stand leaflet
to assemble the Table-Top Stand.

KDL-32EX725/40EX725/55EX725 11
SECTION 1 - SAFETY AND FEATURES
Información de licencias
Macintosh es una marca comercial de Apple Inc., registrada en EE. UU. y otros países.
HDMI, el logotipo de HDMI y High-Definition Multimedia Interface son marcas comerciales o marcas comerciales registradas de HDMI
Licensing, LLC. en EE. UU. y en otros países.
Fergason Patent Properties, LLC:
Nº de patente de EE. UU. 5.717.422
Nº de patente de EE. UU. 6.816.141
Fabricado bajo licencia de Dolby Laboratories. Dolby y el símbolo de la doble D son marcas comerciales de Dolby Laboratories.
Blu-ray Disc es una marca comercial.
“BRAVIA” y , S-Force, Motionflow, BRAVIA Sync y son marcas comerciales o marcas registradas de Sony Corporation.
“PlayStation” es una marca comercial registrada y “PS3” es una marca comercial de Sony Computer Entertainment Inc.
DLNA®, el logotipo de DLNA y DLNA CERTIFIED® son marcas comerciales, marcas de servicio o marcas de certificación de Digital Living
Network Alliance.
TrackID is a trademark or registered trademark of Sony Ericsson Mobile Communications AB.
Music and video recognition technology and related data are provided by Gracenote®. Gracenote is the industry standard in music recognition
technology and related content delivery. For more information, please visit www.gracenote.com.
CD, DVD, Blu-ray Disc, and music and video-related data from Gracenote, Inc., copyright © 2000-present Gracenote. Gracenote Software,
copyright © 2000-present Gracenote. One or more patents owned by Gracenote apply to this product and service. See the Gracenote website for
a nonexhaustive list of applicable Gracenote patents. Gracenote, CDDB, MusicID, MediaVOCS, the Gracenote logo and logotype, and the
“Powered by Gracenote” logo are either registered trademarks or trademarks of Gracenote in the United States and/or other countries.

KDL-32EX725/40EX725/55EX725 12
SECTION2-SOFTWAREREQUIREMENTS
OVERVIEW
There are 2 reasons for updating the software on the TVs.
●Software updates for customers
These updates are for enhancements or improvements that
have been made to the software after the TV was released.
●Software update for servicers
These updates are specically for servicers to use during a
service call.
SOFTWARE UPDATES FOR CUSTOMERS
The subject of software updates is a very important. The televisions
of today have advanced to the point where they are not simply a
television anymore. They are evolving into devices that are designed
to integrate with numerous other devices found in the home. Some
examples are: Portable audio and video devices, still cameras, home
computer networks and accessing the internet to name a few.
Communications with these varying devices requires that the
television be compatible with varying communications protocols.
Although standards are detailed for each of these protocols, the real
world dictates that occasional errors may occur that could prevent
devices from operating or communicating properly.
Keeping the software in the television up-to-date is a procedure that
is normally handled by the owner of the television. Most customers
who own computers and other digital devices are familiar with and are
accustomed to updating the software in their products. If a customer
contacts the Sony Customer Support Center and it is deemed to
be correctable with a software update, the issue is handled at the
customer level.

KDL-32EX725/40EX725/55EX725 13
SECTION 2 - SOFTWARE REQUIREMENTS
SOFTWARE UPDATES FOR SERVICERS
The models in this manual utilize a “generic” type Main Board. In
the past, many different Main Boards needed to be stocked due to
differences in software requirements. The software loaded on the
board was specic to the model and its features along with the type
of LCD panel installed during production.
Replacement Main Boards are now stocked with basic software.
Once the replacement board is installed in the unit, the most current
software needs to be installed using a USB thumb drive containing
the necessary software downloaded.
This new method of supplying Main Boards signicantly reduces the
complexity of replacing LCD panels and Main Boards. Information
about the LCD panel is stored on the T-CON circuits. This information
is automatically loaded onto the Main Board when the TV is powered
up. With the correct software version the Main Board and/or the
T-CON or LCD panel can be replaced more efciently.
In addition to software installation, service adjustment information
may need to be modied or veried to complete the service of the
TV. Service adjustment information is covered in “Section 7 - Service
Adjustments” on page 66.
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 notied and receive the proper authorization for
reimbursement.
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.

KDL-32EX725/40EX725/55EX725 14
SECTION 2 - SOFTWARE REQUIREMENTS
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
Most symptoms that are correctable by software updates involve
communications issues with other devices or minor glitches in
the operation of a specic 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 le viewing)