Sony XBR-46HX929 / XBR-55HX920 / XBR-55HX929 Service Manual ▷ View online
XBR-46HX929/55HX920/55HX929 11
SECTION 1 - SAFETY AND FEATURES
VÉRIFICATION DE SÉCURITÉ
Après avoir corrigé le problème de service original, effectuez les vérifications de sécurité suivantes avant de remettre le
téléviseur au client :
1. Vérifiez le secteur de votre réparation afin de vous assurer qu’il ne reste aucune connexion non soudée ou mal soudée.
Vérifiez toute la surface du circuit pour la présence d‘éclaboussures ou de ponts de soudure.
2. Vérifiez le filage inter-modules afin de vous assurer qu’aucun fil n’est « pincé » ou soit en contact avec des résistances à
wattage élevé.
3. Assurez-vous que tous les boutons de contrôle, écrans, couvercles, courroies de mise à la terre et équipement de fixation
ont été remplacés. Soyez absolument certain d’avoir remplacé tous les isolateurs.
4. Recherchez la présence de pièces de remplacement non autorisées, surtout au niveau des transistors, qui auraient été
installés lors d’une réparation antérieure. Faites-en la remarque au client et recommandez leur remplacement.
5. Recherchez toute pièce qui, quoique fonctionnelle, fait montre de signez évidents de détérioration. Faites-en la remarque au
client et recommandez leur remplacement.
6. Vérifiez la présence de fissures et d’abrasions sur les cordons. Recommandez le remplacement de ces cordons au client.
7. Vérifiez les terminaux d’antenne, les garnitures en métal, les boutons « métallisés », les vis et autres pièces en métal
exposées pour toute fuite de courant. Vérifiez les fuites de la façon décrite ci-dessous.
XBR-46HX929/55HX920/55HX929 12
SECTION 1 - SAFETY AND FEATURES
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
The cover-plate retaining screw on most AC outlet boxes is at earth ground.Verify
the AC outlet box retaining screw ground by connecting 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).
Trouble Light
AC Outlet Box
Figure B. Checking for earth ground.
To Exposed Metal
Parts on Set
0.15 µF
Earth Ground
AC
Voltmeter
(0.75V)
Figure A. Using an AC voltmeter to check AC leakage.
XBR-46HX929/55HX920/55HX929 13
SECTION 1 - SAFETY AND FEATURES
SELF DIAGNOSIS FUNCTION
The TVs 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 indicator is listed in the Operating
Instruction manual for the user’s 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
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.
For complete information, refer to
For complete information, refer to
“Section 4 - Troubleshooting” on page 34
.
Self Diagnosis
Supported model
XBR-46HX929/55HX920/55HX929 14
SECTION 1 - SAFETY AND FEATURES
OVERVIEW
The AZ2-F chassis is one of several designs for the 2011 model line
of Sony Bravia® LCD televisions. This manual covers the following
models:
XBR-46HX929
XBR-55HX920
XBR-55HX929
XBR-46HX929
XBR-55HX920
XBR-55HX929
FEATURES
Several new features are introduced in this chassis model lineup
along with some carryovers from the previous year.
SEE IT ALL IN 3D
Enjoy incredible depth and a sharp, Full HD 1080p picture from the
leader in 3D technology. (3D Active Glasses required, sold separately)
INTELLIGENT PEAK LED BACKLIGHT
Experience Sony’s best picture quality and extraordinary contrast
with full-array local dimming technology. This innovative technology
consists of an array of LED lights that adjust the bright and dark levels
in each area of the screen for more precise control of the picture.
SLEEK DESIGN
Sony’s monolithic design consists of an elegant sheet of glass
stretching from edge-to-edge. It looks just as good when it’s off as it
does when it’s on.
OPTICONTRAST™ PANEL
Sony’s exclusive panel technology boosts contrast and brightness,
making for an enhanced viewing experience.
X-REALITY™ PRO ENGINE
Enjoy Sony’s best picture experience no matter what you’re watching.
Sony’s X-Reality PRO engine brings out incredible detail through
multi-frame, pixel-by-pixel analysis of each scene. You will see
optimal color, contrast and sharpness including in low resolution web
videos.
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