Sony Bravia KDL-46HX823 User manual

SERVICE MANUAL
Version Date Subject
1.0 4/2011 Original manual issue.
2.0 8/2012 Added (A/V) and (SCART) to the description of the CABLE CONVERSION. (P.96, P.97)
LCD Digital Color TV
9-888-424-02
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE: 4/2011 AZ2F CHASSIS
Segment: 2b-2
KDL-46/55HX820,823,825 (AEP/UK)
S/N range 3,000,001-3,999,999 (FX)

SERVICE MANUAL
LCD Digital Color TV
AZ2F CHASSIS
Segment: 2b-2
9-888-424-02

KDL-46/55HX820,823,825(AEP/UK) 3
MODEL LIST
MODEL COLOR COMMANDER DEST.MODEL COLOR COMMANDER DEST.
KDL-46HX820 Black RM-ED044 AEP
KDL-46HX823 Black RM-ED044 AEP/UK
KDL-46HX825 Black RM-ED044 AEP
KDL-55HX820 Black RM-ED044 AEP
KDL-55HX823 Black RM-ED044 AEP/UK
KDL-55HX825 Black RM-ED044 AEP

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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-46/55HX820,823,825(AEP/UK) 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-46/55HX820,823,825(AEP/UK) 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-46/55HX820,823,825(AEP/UK) 7
- Please hold the long side more than 200mm from the short side. (Fig.1)
- When you ground Tengo panels beneath, ground it on the level slowly. (Fig.2)
More than 200mm from the short side
HANDLING THE TENGO PANEL
When handling the TENGO panel, please obey the following instructions.
WARNINGS AND CAUTIONS
Fig.1
Fig.2

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By following handling, resin separation/cracking of glass may be occurred, “restrict” the following items.
1. Temporarily putting on lower cushion with bottom of glass. (Fig.1)
2. Ground with the bottom of glass. (Fig.2)
3. Grip as palm touches glass side. (Fig.3)
4. Hold the short side. (Fig.4)
5.Hold glass only when glass side up. (Fig.5)
Easy to bent
WARNINGS AND CAUTIONS
Fig.1 Fig.2 Fig.3
Fig.5
Fig.4

KDL-46/55HX820,823,825(AEP/UK) 9
When replacing the Tengo panel at service, please note the followings.
- Unpack the carton box, pull out the panel with reinforcing plates. (Fig.3)
-Together with reinforcing plates, place the panel with face down slowly. (Fig.4)
* Please use the reinforcing plates as operating table.
NOTES ON REPLACING THE TENGO PANEL
WARNINGS AND CAUTIONS
Fig.3 Fig.4

KDL-46/55HX820,823,825(AEP/UK) 10
When replacing the Tengo panel at service, please note the followings.
- Unpack the package of Tengo panel. (Fig.5)
- Cut protection bag at the center of the back of panel. (Fig.6)
* Please cut the protection bag carefully, the bag will be used for re-packing.
WARNINGS AND CAUTIONS
Fig.6Fig.5

KDL-46/55HX820,823,825(AEP/UK) 11
When replacing the Tengo panel at service, please note the followings.
- Assemble TV set with the new panel. (Fig.7)
- After assembly, attach Stand Unit and stand the TV up. (Fig.8)
WARNINGS AND CAUTIONS
Fig.7 Fig.8

KDL-46/55HX820,823,825(AEP/UK) 12
When replacing the Tengo panel at service, please note the followings.
- Set the plastic bag on correct position of package and place the replaced panel on it. (Fig.9)
* Handle the panel carefully as the instruction below.
- Align the bottom side of panel with cushions on the package. (Fig.10)
* Please note that it may damage to the glass surface if you pack panel in the wrong orientation.
* Please handle with care to prevent hitting the glass of panel to package materials.
More than 200mm from the short side
WARNINGS AND CAUTIONS
Fig.10Fig.9

KDL-46/55HX820,823,825(AEP/UK) 13
When replacing the Tengo panel at service, please note the followings.
- Tape the plastic bag on the back of panel to protect panel surface. (Fig.11)
* Please make sure the orientation of the panel again. (T-CON board side is lower.)
- Repack the panel in the original carton box.
Fig.11
Fig.12
WARNINGS AND CAUTIONS

KDL-46/55HX820,823,825(AEP/UK) 14
2
1
1
Push!!
When you insert / pull out FFC, please grasp a reinforcement board and main body of FFC.
<GOOD> <NG>
< Insertion >
Please hold reinforcement board and plunge it to the depths.
Please pull out FFC while pushing the button of both ends
at the same time.
Reinforce
plate
B board
FFC can reverse insertion to connector of B board.
If reverse insertion FFC, all pins short-circuit, and board is broken.
Upper side is GND shield Upper side is terminal
<Pull out>
HANDLING THE FFC
WARNINGS AND CAUTIONS
Reinforce
plate
<GOOD> <NG>
B board

KDL-46/55HX820,823,825(AEP/UK) 15
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.

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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-46/55HX820,823,825(AEP/UK) 17
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.
0.5
0.5 3
DISPLAY OF STANDBY LED FLASH COUNT
SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to bring up past occurrences of failure for
confirmation on the screen:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
5
*: Note that this differs from entering the service mode (volume +)
*
DISPLAY TV POWERChannel Volume
STBYLED
Flash time
Service menu Item
name
(Screen Display) Diagnostic Item Description
2 MAIN_POWE Main Power Over Voltage Protection
DC_ALERT DC_ALERT
AUD_PROT Audio Abnormal Detection
4 BALANCER LED driver failure
TCON_ERR T-CON Error
HFR_ERR HFR Error
P_ID_ERR Panel ID NVMError
6 BACKLITE Back Light Error (Panel Inverter)
TEMP_ERR Thermal Error
FAN_ERR Fan Error
8 - Software Error
9 - Notused
10 EMITTER Emitter Error
11 - Notused
12 - Notused
3
5
7

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SELF DIAGNOSIS FUNCTION
[SELF DIAGNOSTIC SAMPLE SCREEN DISPLAY]
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen.
After you have completed the repairs, clear the result display to “0”.
Clearing the Self Check Diagnostic List
1. Error history and Error count : Press the Channel 8 => Channel 0 .
2. Panel operation time : Press the Channel 7 => Channel 0 .
Exiting the Self-diagnostic screen
To exit the Self Diagnostic screen, turn off the power to the TV by pressing the POWER button on the remote or the POWER button on the TV.
SELFCHECK<1>NEXTPAGE‐>
000RGB_SEN‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
002MAIN_POWE‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
003DC_ALERT‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
003AUD_PROT‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
003DTT_WDT‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
004VLED‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
004BALANCER‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
005HFR_ERR‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
005TCON_ERR‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
005P_ID_ERR‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
006BACKLITE‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
007TEMP_ERR‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
007FAN_ERR‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
010EMITTER ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
011IA‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐ 00
12345‐67891‐23456
Error count (00-99)
Error history (Last failure time beforehand)
Error history (Failure time before last)
Error history (The last failure time)
Item name
STBY LED flash time
Total operation time by hour (MAX:65535)
Boot count (MAX:65535)
Panel operation time by hour (MAX:65535)

KDL-46/55HX820,823,825(AEP/UK) 19
SEC 1. DISASSEMBLY
• There are clutch in the yellow frame[ ]. Therefore please be careful in the case of the disassembly or assembly of parts.
Note: Metal type Rear Cover is used in these models.
When handle the Rear Cover, please pay special attention to the sharp edges due to no curing finish.
When working, wearing gloves is recommended.
Location of the sharp edges, please refer to “APPENDIX-2”.
Note: When removal rear cover, damaged with rear cover and power supply cord.
Removal the rear cover and power supply cord, please refer to “APPENDIX-1”.

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1-1. KDL-46HX820/823/825
1-1-1. STAND BLOCK, HEAD STAND, NECK AND BASE STAND
DISASSEMBLY
HEAD STAND
NECK
BASE STAND
1 Screw (USER SCREW ST) – Inside bag, screw assy
3 Screws (SCREW, +PSW M5X16) – Inside bag, screw assy
3 Screws (USER SCREW ST) – Inside bag, screw assy