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KDL-46HX850/55HX850 ii

Selecting the Segment Code ..................................................................30
Selecting the Destination ........................................................................31
Selecting the Model Name ......................................................................32
Selecting the BU Trans ...........................................................................32
Adding the Serial Number .......................................................................33
Confirming the Model ID and Product ID ................................................35
Clearing the Self Diagnosis Self Check Information ...............................36

Updating the Software ............................................................................39
Copying the BU Flash Data ....................................................................39
Confirming the Model ID and Product ID ................................................40
Resetting the Panel Operation Time .......................................................41
Clearing the Self Diagnosis Self Check Information ...............................42

KDL-46HX850/55HX850 iii

These servicing instructions are for use by qualified 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 qualified to do so.

An isolation transformer should be used during any service to avoid possible 

shock hazard, in case of live chassis. 

!

 

There are critical components used in LCD color TVs that are important for 

safety. These components are identified with shading and ! mark on the 

schematic diagrams and the parts list. It is essential that these critical parts 

be replaced only with the part number specified in the parts list to prevent 

electric shock, fire, or other hazard.

NOTE: Do not modify the original design without obtaining written permission 

from the manufacturer or you will void the original parts and labor warranty.

For safety reasons, component level repair of the Power Supply Boards 

and/or the Inverter Boards is prohibited. 

Ces instructions de service sont à l’usage du personnel de service qualifié 

seulement. Pour prévenir le risque de choc électrique, ne pas faire l’entretien 

autre que celui contenu dans le Mode d’emploi à moins que vous soyez 

qualifié faire ainsi.

Afin d’eviter tout risque d’electrocution provenant d’un chássis sous tension, 

un transformateur d’isolement doit etre utilisé lors de tout dépannage. 

Les  composants  identifies  par  une  trame  et  par  une  marque

  !  sur les 

schemas de principe, les vues explosees et les listes de pieces sont d’une 

importance critique pour la securite du fonctionnement. Ne les remplacer 

que par des composants Sony dont le numero de piece est indique dans le 

present manuel ou dans des supplements publies par Sony. Les reglages 

de circuit dont l’importance est critique pour la securite du fonctionnement 

sont  identifies  dans  le  present  manuel.  Suivre  ces  procedures  lors  de 

chaque remplacement de composants critiques, ou lorsqu’un mauvais 

fonctionnement suspecte.

Pour  des  raisons  de  sécurité,  Interdire  de  réparer  ou  remplacer  les 

composantes dans les blocs d’alimentation et/ou sur les modules d’inverseur

KDL-46HX850/55HX850 iv

 

Disconnect all cables when 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.

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-46HX850/55HX850 v

CAUTION: When cleaning the TV, be sure to unplug the power cord to avoid any chance of electric shock.

 

;

Stubborn stains may be removed with a cloth slightly moistened with a solution of mild soap and warm water.

 

;

If using a chemically pretreated cloth, please follow the instruction provided on the package.

 

;

Never use strong solvents such as a thinner, alcohol or benzine for cleaning. 

 

;

Periodic vacuuming of the ventilation openings is recommended to ensure proper ventilation.

 

;

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.

 

;

Do Not

 use any cleaning product containing alkaline/acid cleaner, scouring powder, or volatile solvent, such as alcohol, ammonia, benzine, thinner or 

insecticide. Using any of these harsh cleaners may result in permanent damage to the screen.

 

;

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.