Sony BRAVIA KDL-40NX725 User manual

SERVICE MANUAL
LCD Digital Color TV
AZ2-F Chassis
Segment: 3a-1
9-888-425-01
Version Date Subject
1.0 4/25/2011 No revisions or updates are applicable at this time.
ORIGINAL MANUAL ISSUE DATE: 4/2011
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:

SERVICE MANUAL
LCD Digital Color TV
AZ2-F Chassis
Segment: 3a-1
9-888-425-01
Self Diagnosis
Supported model
KDL-40NX725

MODEL LIST
MODEL COMMANDER DESTINATION MODEL COMMANDER DESTINATION
KDL-40NX725 RM-YD062 BRAZIL
KDL-55NX725 RM-YD062 BRAZIL
KDL-60NX725 RM-YD062 BRAZIL
9-888-425-01

KDL-40NX725/55NX725/60NX725 i
TABLE OF CONTENTS
Section 1 - Safety and Features.................................................1
Warnings and Cautions ..............................................................1
Handling the LVDS FFC Connector ...........................................3
Special Handling Instructions When Replacing the LCD Panel
Assembly..............................................................................4
Safety-Related Warnings ...........................................................5
Safety Check-Out.......................................................................6
Self Diagnosis Function .............................................................8
Overview ....................................................................................9
Features .....................................................................................9
See It All in 3D............................................................................. 9
Dynamic Edge LED Backlight ..................................................... 9
Sleek Design ............................................................................... 9
OptiContrast™ Panel .................................................................. 9
MotionFlow™ XR 240 ................................................................. 9
Internet Streaming & Connectivity............................................. 10
X-Reality™ Engine .................................................................... 10
Intelligent Presence Sensor ...................................................... 10
Navigation Made Easy .............................................................. 10
Faster Start-Up.......................................................................... 10
Energy Saving Switch ............................................................... 10
USB Photos, Videos & Music .....................................................11
LightSensor™ Technology .........................................................11
BRAVIA® Sync™ Compatible ....................................................11
Specications ...........................................................................12
Section 2 - Software Requirements.........................................15
Overview ..................................................................................15
Software Updates for Customers .............................................15
Software Updates for Servicers ...............................................16
Software Update Responsibility ................................................ 16
Checking the Software Version ................................................. 16
Examples of Software Correctable Symptoms.......................... 17
Section 3 - Chassis Overview..................................................18
Overview ..................................................................................18
Overall Circuit Description........................................................20
Main Board...............................................................................20
Tuner ......................................................................................... 20
X-Reality Processor................................................................... 20
Audio Amplier .......................................................................... 20
Temperature Sensor.................................................................. 20
Power Supply ...........................................................................21
Power Supply for Backlight System .......................................... 21
LD Board (Local Dimming).......................................................21
3D IR Emitter............................................................................21
Wireless LAN Card...................................................................21
Switch Unit ...............................................................................21
USB Camera ............................................................................22
IR Board ...................................................................................22
LCD Panel Assembly ...............................................................22
TCON Board.............................................................................. 22

KDL-40NX725/55NX725/60NX725 ii
TABLE OF CONTENTS
Diagrams..................................................................................23
Block Diagrams ......................................................................... 23
Connector Diagrams ................................................................. 25
Section 4 - Troubleshooting.....................................................29
Overview ..................................................................................29
Updating the Software............................................................... 29
Triage Chart .............................................................................30
Protection Shutdown ................................................................31
Standby LED Flash Count......................................................... 31
Diagnostic Code Descriptions ..................................................33
Viewing the Self Check Diagnostic History ............................... 34
Section 5 - Flow Charts and Diagrams ...................................35
Overview ..................................................................................35
No Power................................................................................... 36
Standby LED Blinking................................................................ 39
No Picture.................................................................................. 40
Section 6 - Disassembly/Part Number Information ...............42
Table-Top Stand Assembly Removal........................................42
Rear Cover and AC Cover Removal ........................................43
Switch Unit, HEM2 Board, Camera Module, and
Wireless LAN Card Removal..............................................44
G4/G6/G7 (Power Supply) Board and
LD Board Removal .............................................................45
KDL-40NX725/55NX725 Only................................................... 45
KDL-60NX725 Only................................................................... 46
BATL (Main) Board Removal....................................................47
Center Cabinet, HLT2 Board and LCD Panel Removal ...........48
Cleaning the LCD Panel............................................................ 48
Screws .....................................................................................49
Connectors...............................................................................49
KDL-40NX725 Only................................................................... 49
KDL-55NX725 Only................................................................... 50
KDL-60NX725 Only................................................................... 50
Accessories and Packaging .....................................................51
Miscellaneous ..........................................................................51
Remote Commander................................................................51
Wire Dressing...........................................................................52
KDL-40NX725 Only................................................................... 52
KDL-55NX725 Only................................................................... 52
KDL-60NX725 Only .................................................................. 52
Section 7 - Service Adjustments .............................................53
Overview ..................................................................................53
Updating the Software..............................................................53
Accessing Service Adjustment Mode .......................................53
Viewing or Changing Service Data............................................ 54
Verifying Service Adjustments..................................................55
Verifying the Segment Code...................................................... 55
Verifying the Destination............................................................ 55
Verifying the Model Name ......................................................... 56
Optional Adjustments ...............................................................56
Setting White Balance Adjustments .......................................... 56

KDL-40NX725/55NX725/60NX725 iii
TABLE OF CONTENTS
Resetting the TV to Factory Condition .....................................57
Resetting the TV to Factory Condition Using Service Mode ..... 57
Appendix A - Removing the Rear Cover ............................... A-1
Rear Cover Caution ............................................................... A-1
KDL-40NX725 Only..................................................................A-1
KDL-55NX725 Only..................................................................A-2
KDL-60NX725 Only..................................................................A-3
Removing the Power Cord from the Rear Cover ................... A-4

KDL-40NX725/55NX725/60NX725 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-40NX725/55NX725/60NX725 2
SECTION 1 - SAFETY AND FEATURES
CAUTION
WDo 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.
WDo 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.
WDo 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.
RStubborn stains may be removed with a cloth slightly moistened with a solution of mild soap and warm water.
RIf using a chemically pretreated cloth, please follow the instruction provided on the package.
RNever use strong solvents such as a thinner, alcohol or benzine for cleaning.
RPeriodic vacuuming of the ventilation openings is recommended to ensure to proper ventilation.

KDL-40NX725/55NX725/60NX725 3
SECTION 1 - SAFETY AND FEATURES
HANDLING THE LVDS FFC CONNECTOR
Use caution when you connecting or removing the LVDS FFC Connector.
DO NOT remove the connector by the reinforcement tab only.
1. Holding onto the entire LVDS FFC Connector,
insert the LVDS FFC Connectorinto the connector slot.
1. Gently press down on the release tabs of the connector slot.
2. Holding onto the entire LVDS FFC Connector,
pull out the connector while continuing to hold down
the release tabs of the connector slot.
(See caution below.)
Insert
connector.
2
Press down
Press down
Main Board
Main Board
CAUTION: The LVDS FFC Connector can be inserted into the Main Board upside down.
If it is inserted upside down, the pins on the LVDS FFC Connector
will short-circuit and damage the board.
Remove
connector.
Inserted Correctly Inserted Incorrectly
Correct Incorrect
DISCONNECTING THE LVDS FFC CONNECTOR CONNECTING THE LVDS FFC CONNECTOR

KDL-40NX725/55NX725/60NX725 4
SECTION 1 - SAFETY AND FEATURES
SPECIAL HANDLING INSTRUCTIONS WHEN REPLACING THE LCD PANEL ASSEMBLY
Use the following precautionary guidelines when handling the LCD Panel Assembly to avoid material degradation or screen coating degradation,
and ensure that dust, dirt, or ngerprints are not left between the glass and the LCD Panel Assembly.
1. After removing the boards and connectors, note where the frame is on the panel. (Figure 1)
2. Lift the LCD Panel Assembly by holding the top and bottom of the panel approximately 200mm from the edge with your palms
on the back of the panel. (Figure 2)
CAUTION: Lifting or holding the panel at the corners may damage the panel.
3. Use the same method when taking the replacement panel out of the carton. (Figure 3)
Figure 1 Figure 2 Figure 3
CAUTION: DO NOT lift the LCD Panel by holding the short side of the panel or by placing your palms on the front glass. (Figures 4 & 5)
Figure 4 Figure 5