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Segment: P-2F

KDL-55BX520 i

Warnings and Cautions - English ...............................................1

Safety-Related Warnings ............................................................ 3

Warnings and Cautions - French ...............................................4
Safety Check-Out .......................................................................7
Self Diagnosis Function ...........................................................10
Overview .................................................................................. 11
Features ................................................................................... 11

Scene Select ..............................................................................11
USB Input ..................................................................................11
LightSensor™ Technology .........................................................11
5 HD Inputs ................................................................................11
BRAVIA® Sync™ Compatible .................................................. 12

Specifications ...........................................................................13

Overview ..................................................................................14
Software Updates for Customers .............................................14
Software Updates for Servicers ...............................................15

Software Update Responsibility ................................................ 15
Checking the Software Version ................................................. 15
Examples of Software Correctable Symptoms ......................... 16

Overview ..................................................................................17
Overall Circuit Description .......................................................18

Main Board ............................................................................... 18
FRC Board ................................................................................ 18
Power Supply ............................................................................ 19
Inverter ...................................................................................... 19
Switch Unit ................................................................................ 19
H Board ..................................................................................... 19

Diagrams ..................................................................................20

Block Diagrams ......................................................................... 20
Connector Diagrams ................................................................. 22

Overview ..................................................................................23

Updating the software ............................................................... 23

Video Failures ..........................................................................23

No Video ................................................................................... 23
Video Distortion ........................................................................ 24

Audio Troubleshooting .............................................................25
Power Supply Troubleshooting ................................................26

Completely Dead Set ................................................................ 26
TV Won’t Power On .................................................................. 26

Backlight Issues .......................................................................26

No Backlight, No Shutdown ...................................................... 26

Protection Shutdown ................................................................27

Standby LED Flash Count ........................................................ 27

KDL-55BX520 ii

Diagnostic Code Descriptions ..................................................29

Viewing the Self Check Diagnostic History ............................... 30
Clearing the Self Check Diagnostic List .................................... 31
Exiting the Self Check Diagnostic Screen ................................ 31

Test Points ...............................................................................31

Video Information .....................................................................32
Power Supply Information ........................................................34
Protection Information ..............................................................35

Table-Top Stand Assembly Removal .......................................37
Rear Cover and Speakers Removal ........................................38
A (Main) Board, G17 (Power Supply) Board  

and LCD Panel Removal .........................................................39

Cleaning the LCD Panel ........................................................... 39

Screw Legend ..........................................................................40
Connectors ...............................................................................40
Accessories and Packaging .....................................................41
Optional Accessories ...............................................................41
Miscellaneous ..........................................................................41
Remote Commander ................................................................41
Wire Dressing ..........................................................................42

Overview ..................................................................................43
Updating the Software .............................................................43
Accessing Service Adjustment Mode .......................................43
Accessing Factory Adjustment Mode .......................................44

Adjusting the Color Temperature .............................................. 45