Sony Bravia KDL-46HX900 User manual

AZ1-L CHASSIS
Segment: 2b-1
SERVICE MANUAL
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE: 6/2010
Version Date Subject
1.0 6/2010 No revisions or updates are applicable at this time.
LCD Digital Color TV
9-888-328-01

SERVICE MANUAL
LCD Digital Color TV
AZ1-L CHASSIS
Segment: 2b-1
9-888-328-01

KDL-46/52HX900(HK/AUS)3
MODEL LIST
MODEL COLOR COMMANDER DEST.MODEL COLOR COMMANDER DEST.
KDL-46HX900 Black RM-GD012 Hong Kong
KDL-46HX900 Black RM-GD012 Australia
KDL-52HX900 Black RM-GD012 Australia

KDL-46/52HX900(HK/AUS)4
WARNINGS AND CAUTIONS -ENGLISH
CAUTION
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.
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.
CARRYING THE TV
Be sure to follow these guidelines to protect your property and avoid causing serious injury.
• Carry the TV with an 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 damages.
SAFETY-RELATED COMPONENT WARNING!!
Components identified by shading and ! mark on the schematic diagrams, exploded views, and in the parts list are critical for safe operation.
Replace these components with Sony parts whose part numbers appear as shown in this manual or in supplements published by Sony. Circuit
adjustments that are critical for safe operation are identified in this manual. Follow these procedures whenever critical components are replaced or
improper operation is suspected.

KDL-46/52HX900(HK/AUS)5
WARNINGS AND CAUTIONS - FRENCH
ATTENTION!!
Ces instructions de service sont à l’usage du personnel de service qualifi é 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 qualifi é
faire ainsi.
WARNING!!
Afi n d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout
dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.
POUR TRANSPORTER LE TÉLÉVISEUR
Tenez compte de ce qui suit pendant l’installation du téléviseur :
• Débranchez tous les câbles avant de transporter le téléviseur.
• Transportez le téléviseur avec le nombre de personnes approprié ; un téléviseur de grande taille doit être transporté par au moins deux personnes.
• Lors du transport du téléviseur, l’emplacement des mains est très important pour votre sécurité, ainsi que pour éviter de causer des dommages.
ALERTE!!
Afi n d’eviter tout risque d’electrocution provenant d’un chassis sous tension, un transformateur d’isolement doit etre utilise lors de tout
depannage. Le chassis de ce recepteur est directement raccorde a l’alimentation du secteur.
ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Les composants identifi es 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 identifi es dans le present manuel. Suivre ces procedures lors de chaque remplacement de composants critiques, ou lorsqu’un
mauvais fonctionnement suspecte.

KDL-46/52HX900(HK/AUS)6
WARNINGS AND CAUTIONS
USE CAUTION WHEN HANDLING THE LCD PANEL
When repairing the LCD panel, be sure you are grounded by using a wrist band.
When repairing the LCD panel on the 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 (CCFL) 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) It is recommended not to exceed 1 hour of Power-On nor Burn-in period with LCD panel face down condition, in repair activity.

KDL-46/52HX900(HK/AUS)7
WARNINGS AND CAUTIONS
HANDLING THE GLASS ASSEMBLY
Use the following precautionary guidelines when replacing the Glass Assembly to avoid material degradation or screen coating degradation, and
ensure that dust, dirt, or fingerprints are not left between the glass and the LCD panel.
• Replace the Glass Assembly in a brightly lit and clean room.
• Place the replacement Glass Assembly on a dark cloth to make it easier to see dust and dirt particles.
• Wear anti static gloves to avoid leaving finger prints on the glass.
• Use a dry, soft Micro Fiber cloth, such as a lint free polishing cloth, to gently wipe the glass to remove any dust or dirt particles.
• If the glass needs additional cleaning, slightly moisten the cloth with a diluted mild soap or mild detergent solution, or use a compressed
air duster (spray can type).
• After replacing the Glass Assembly, verify there are no dark spots or finger prints visible on the screen.
CAUTION:
• 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,
benzene, 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.

KDL-46/52HX900(HK/AUS)8
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.
8. For safety reasons, repairing the Power board and/or Inverter board is prohibited.

KDL-46/52HX900(HK/AUS)9
SAFETY CHECK-OUT
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.
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).

KDL-46/52HX900(HK/AUS)10
SELF DIAGNOSIS FUNCTION
DIAGNOSTIC TEST INDICATORS
When an error occurs, the STANDBY LED will flash a set number
of times to indicate the possible cause of the problem.
If there is more than one error, the LED will identify the first of the
problem areas.
Result for all of the following diagnostic items are displayed on
screen.
If the screen displays a “0”, no error has occurred .
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED will automatically begin to flash.
The number of times the LED flashes translates to a probable source of the problem.
A definition of the STANDBY LED flash indicators is listed in the instruction manual for the user’s knowledge and 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.
STBYLED
Flash time Service menuItem name (ScreeenDisplay) Diagnostic Item Description
2 MAIN_POWE Main Power Over Voltage Protection
DC_ALERT DC_ALERT
DTT_WDT DTT Error
AUD_PROT Audio Abnormal Detection
4 BALANCER_ Panel Balancer Error
TCON_ERR T-CON Error
HFR_ERR HFR Error
P_ID_ERR Panel ID NVM Error
6 BACKLITE_ Back Light Error (Panel Inverter)
TEMP_ERR Thermal Error
FAN_ERR FAN Error (Not Detected. Display Only)
8 - Not used
9 - Not used
10 - Not used
11 - Not used
12 - Not used
- RGB_SEN RGB Sensor ACK Error
3
5
7