Sony KDE-50XS955 - 50" Flat Panel Color Tv User manual

Ver. DATA CONTENTS
1.0 2004. 9 New
1.1 2004. 9 Correction. (P.1-2, P.1-6, P.2-1, P.4-3, P.4-4, P.4-5, P.4-6, P.4-7, P.4-8)
1.2 2004. 11 Section1. DISASSEMBLY 1-1. Service position added. (P.1-1)
Section3. DIAGRAMS Revised entirely. (P.3-1)
Section4. EXPLODED VIEWS
Parts added in 4-1, 4-2, 4-3, 4-5, 4-6 (P.4-3, P.4-4, P.4-5, P.4-7, P.4-8)
Section5. ELECTRICAL PARTS LIST Changed. (P.5-18, P.5-19, P.5-55)
1.3 2005. 8 Addition of WARNING AND CAUTIONS (P. 3 )
MODEL NAME : KDE-50XS955
SERVICE MANUAL
PARTS No. : 9-878-259-04
MODIFICATION HISTORY
* Blue characters are linking.

SERVICE MANUAL
SPECIFICATIONS
KDE-50XS955
FLAT PANEL COLOR TV
US Model
Canadian Model
Panel System Plasma Display panel
Display resolution 1365 pixels (horizontal) ×768 pixels (vertical)
KDE-50XS955
Antenna 75 ohm external terminal for VHF/UHF
Television System NTSC American TV Standard
ATSC (8VSB terrestrial) ATSC compliant 8VSB
QAM on cable ITU-T J.83 Annex B compliant 64/256 QAM
Channel Coverage 2-69
1-125
Terrestrial (digital) 2-69
Cable TV (digital)
Terrestrial (analog)
Cable TV (analog)
1-135
Power Requirements 120V, 60 Hz
Inputs/Outputs
HDMI IN Video 1080i, 720p, 480p, 480i
Audio Two channel linear PCM 32, 44.1 and 48 kHz,
16, 20 and 24 bits
Video (IN) 1 Vp-p, 75 ohms unbalanced, sync negative
S Video (IN)
5 total (1 on left side panel)
3 total (1 on left side panel)
3 total (1 on left side panel)
Y: 1 Vp-p, 75 ohms unbalanced, sync negative
C: 0.286 Vp-p (Burst signal), 75 ohms
Audio (IN) 500 mVrms (100% modulation)
Impedance: 47 kilohm
XS2 CHASSIS

KDE-50XS955 (UC) 2
Design and specifications are subject to change without notice.
Mass 68.0 kg (149 lb 14 5/8oz)
KDE-50XS955
Power Consumption In Use KDE-37XS955: 350 W
KDE-42XS955: 385 W
KDE-50XS955: 450 W
In Standby 0.5 W
CableCARD Standby KDE-50XS955: 29 W
Supplied Accessories Remote Control (1)
AA (R6) Batteries (2)
AC power cord (1)
AC plug holder (1)
Cable band (1)
Cable band screw (1)
AC cord clamp (1)
Cleaning Cloth (1)
Operating Instructions (1)
Quick Setup Guide (1)
Warranty Card (1)
RM-Y1004
2 (Y, PB, PR)
1
1
Component Video Input Y: 1.0 Vp-p, 75 ohms unbalanced, sync negative;
PB: 0.7 Vp-p, 75 ohms
PR: 0.7 Vp-p, 75 ohms
CONTROL S (IN) Mini jack
Mini jack
CONTROL S (OUT)
Digital Audio Optical Output
(PCM/Dolby Digital)
1Optical rectangular (1)
Variable/Fixed Audio (OUT) 1 More than 408 mVrms at the maximum volume
setting (Variable)
More than 408 mVrms (Fixed)
Impedance (output): 2 kilohms
Sub woofer (OUT) Phono jack
CableCARD
™
slot PCMCIA Type I/II
Screen Size (measured diagonally) 50 inches
KDE-50XS955
Speaker Output 25 W ×2 + 50 W woofer
CENTER SPEAKER IN Max. 180 W (6 Ω), 1 kHz, Sensitivity 30 Vp-p
Dimensions (W ×H ×D) 1136 ×870 ×360 mm
(52 5/8×34 3/8× 14 1/4in)
KDE-50XS955

KDE-50XS955 (UC) 3
WARNING AND CAUTIONS
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!!
A
n 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.
! 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.
ATTENTION!!
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.
A
fin 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
! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
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.

KDE-50XS955 (UC) 4
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-sol-
dered connections. Check the entire board surface for solder
splashes and bridges.
2. Check the interboard wiring to ensure that no wires are
“pinched” or contact high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps,
and mounting hardware have been replaced. Be absolutely cer-
tain that you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly transis-
tors, 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 recom-
mend 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 right.
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
instruments.
2. A battery-operated AC milliammeter. 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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOMs that are suitable. Nearly all battery
operated digital multimeters that have a 2 VAC range are suit-
able. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µF
AC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
WARNING!!
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 PUB-
LISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE
CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN
THIS MANUAL. FOLLOW THESE PROCEDURES WHEN-
EVER CRITICAL COMPONENTS ARE REPLACED OR
IMPROPER OPERATION IS SUSPECTED.
AVERTISSEMENT!!
ATTENTION AUX COMPOSANTS RELATIFS À LA
SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE TRAME ET
UNE MARQUE ! SONT CRITIQUES POUR LA
SÉCURITÉ. NE LES REMPLACER QUE PAR UNE
PIÈCE PORTANT LE NUMÉRO SPECIFIÉ. LES
RÉGLAGES DE CIRCUIT DONT L’IMPORTANCE EST
CRITIQUE POUR LA SÉCURITÉ DU
FONCTIONNEMENT SONT IDENTIFIÉS DANS LE
PRÉSENT MANUEL. SUIVRE CES PROCÉDURES
LORS DE CHAQUE REMPLACEMENT DE
COMPOSANTS CRITIQUES, OU LORSQU’UN MAUVAIS
FONCTIONNEMENT EST SUSPECTÉ.

KDE-50XS955 (UC) 5
TABLE OF CONTENTS
1. DISASSEMBLY ............................................ 1-1
1-1. SERVICE POSITION ........................................ 1-1
1-1-1. PANELS AND CAP REMOVAL ................. 1-1
1-1-2. WOOFER BLOCK REMOVAL ................... 1-1
1-1-3. REAR COVER ASSY REMOVAL .............. 1-1
1-2. STAND REMOVAL .......................................... 1-2
1-3. REAR COVER REMOVAL .............................. 1-2
1-4. QU BOARD REMOVAL .................................. 1-3
1-5. QM AND QT BOARDS REMOVAL ............... 1-3
1-6. A2FN, DE1, DIC3 AND M1U
BOARDS REMOVAL ....................................... 1-4
1-7. A1U, H2, P AND QH BOARDS REMOVAL .. 1-4
1-8. H1U BOARDS REMOVAL .............................. 1-5
1-9. F AND K BOARDS REMOVAL ...................... 1-5
1-10. PLASMA DISPLAY PANEL
ASSY REMOVAL ............................................. 1-6
1-11. H3 AND H4 BOARDS REMOVAL ................. 1-7
1-12. H5 BOARD REMOVAL ................................... 1-7
2. ADJUSTMENTS
and TROUBLESHOOTING .......................... 2-1
2-1. WHITE BALANCE ADJUSTMENT ................ 2-1
2-1-1. Measurement equipment ................................ 2-1
2-1-2. Measuring procedure ..................................... 2-1
2-1-3. Service mode .................................................. 2-1
2-2. TROUBLESHOOTING ..................................... 2-2
3. DIAGRAMS ................................................... 3-1
3-1. BLOCK DIAGRAMS ........................................ 3-1
(1) A1U AND H2 BOARDS ............................... 3-1
(2) A2NU (1/2) AND J1NU BOARDS ............... 3-2
(3) A2NU (2/2), H4 AND J2NU BOARDS........ 3-3
(4) DE1 BOARD ................................................. 3-4
(5) DIC3 BOARD ................................................ 3-5
(6) F AND G1 BOARDS ..................................... 3-6
(7) G2N BOARD ................................................. 3-7
(8) K BOARD ...................................................... 3-8
(9) H1U, H3, H5 AND M1U BOARDS ............. 3-9
(10) P BOARD ....................................................... 3-10
(11) QH AND QM BOARDS ............................... 3-11
(12) QT AND QU BOARDS ................................. 3-12
3-2. FRAME DIAGRAMS ........................................ 3-13
3-3. CIRCUIT BOARDS LOCATION ..................... 3-14
3-4. SCHEMATIC DIAGRAMS AND
PRINTED WIRING BOARDS ........................ 3-14
(1) Schematic Diagrams of A1U Board .............. 3-15
(2) Schematic Diagrams of A2NU Board ........... 3-19
(3) Schematic Diagrams of DE1 Board .............. 3-22
(4) Schematic Diagrams of DIC3 Board ............. 3-27
(5) Schematic Diagram of F Board ..................... 3-34
(6) Schematic Diagrams of G1 Board ................. 3-35
(7) Schematic Diagrams of G2N Board .............. 3-38
(8) Schematic Diagram of H1U and H2 Boards
........................................................................ 3-41
(9) Schematic Diagram of H3 and H4 Boards
........................................................................ 3-42
(10) Schematic Diagram of H5 Board .................. 3-43
(11) Schematic Diagram of J1NU and J2NU Boards
........................................................................ 3-44
(12) Schematic Diagram of K Board .................... 3-45
(13) Schematic Diagrams of M1U Board ............. 3-47
(14) Schematic Diagram of P Board ..................... 3-53
(15) Schematic Diagram of QH Board.................. 3-55
(16) Schematic Diagrams of QM Board ............... 3-56
(17) Schematic Diagrams of QT Board ................ 3-61
(18) Schematic Diagram of QU Board.................. 3-64
3-5. SEMICONDUCTORS ....................................... 3-65
4. EXPLODED VIEWS ...................................... 4-1
4-1. REAR COVER ASSY AND STAND ............... 4-2
4-2. CHASSIS-1 ........................................................ 4-4
4-3. CHASSIS-2 ........................................................ 4-5
4-4. CHASSIS-3 ........................................................ 4-6
4-5. CHASSIS-4 ........................................................ 4-7
4-6. PACKING MATERIALS .................................. 4-8
5. ELECTRICAL PARTS LIST ........................ 5-1

KDE-50XS955 (UC) 1-1
1-1. SERVICE POSITION
1-1-1. PANELS AND CAP REMOVAL
SECTION 1
DISASSEMBLY
1-1-2. WOOFER BLOCK REMOVAL
2Two screws
(+BVTT 4x6)
7Two screws
(+BVTT 4x6)
4Screw
(+BVTP 4x10)
9Screw
(+BVTP 4x10)
5Cap,bottom(R)
0Cap,bottom(L)
3Panel(R),ornament
8Panel(L),ornament
5Cap,bottom(L)
1Screw
(HOOK, M5)
6Screw
(HOOK, M5)
2Two screws
(+BVTP 4x10)
4Woofer block
3Two screws
(BUTTON HEAD 6x40)
1Screw
(+PSW 4x10)
1Screw
(+PSW 4x10)
1-1-3. REAR COVER ASSY REMOVAL
1Six screws
(+PSW 5x10)
3Two screws
(+PSW 4x6)
3Four screws
(+PSW 4x6)
4Twelve screws
(+BVTP 4x16)
5Rear cover assy
3Two screws
(+PSW 4x6)
2Fourteen screws
(+PSW 3x6)

KDE-50XS955 (UC) 1-2
1-2. STAND REMOVAL
1-3. REAR COVER ASSY REMOVAL
1Two screws
3Stand
2Four screws
(+PSW (M5))
1Six screws
(+PSW 5x10)
3Two screws
(+PSW 4x6)
4Four screws
(+PSW 4x6)
5Twelve screws
(+BVTP 4x16)
6Rear cover assy
3Two screws
(+PSW 4x6)
2Fourteen screws
(+PSW 3x6)

KDE-50XS955 (UC) 1-3
1-4. QU BOARD REMOVAL
1-5. QM AND QT BOARDS REMOVAL
2Eight screws
(+PSW 3x6)
5Twrminal board
6Two screws
(+PSW 3x6)
4Two screws
(+PSW 3x8)
7Pod cover
9Pod assy
0QU board
1Two screws
(+BVTP 4x16)
3Five screws
(+BVTP 3x12)
8Four screws
(+PSW 3x5)
qg Shield ATSC bottom
4Shield ATSC top
8Two screws
(+PSW 3x6)
6RF cable
0Lead wire
connector (LVDS)
qa Cable,USB
3Two screws
(+PSW 3x6)
qs Four screws
(+PSW 3x6)
qd QM board
qf Four screws
(+PSW 3x5)
1Four screws
(+PSW 3x6)
2POD bracket
9QT board
7Connecter assy (FFC80P)
5Connecter assy (FFC40P)

KDE-50XS955 (UC) 1-4
1-6. DE1, DIC3, J1NU AND M1U BOARDS REMOVAL
1-7. A1U, A2NU AND P BOARDS REMOVAL
0DE1 board
9Four screws
(+PSW 3x5)
7Four screws
(+PSW 3x5)
qs Shield DM bottom
3J2NU board
4J1NU board
1Two screws
(+PSW 3x6)
2Shield DM top
6M1U board
5Four screws
(+PSW 3x5)
8DIC3 board
qa Four screws
(+PSW 3x6)
1Three screws
(+PSW 3x6)
3Four screws
(+PSW 3x6)
5Four screws
(+PSW 3x6)
7Four screws
(+PSW 3x6)
9Four screws
(+PSW 3x6)
2P board
4A1U board
6A2NU board
8Bracket
0Bracket center

KDE-50XS955 (UC) 1-5
1-8. G1 AND G2N BOARDS REMOVAL
1-9. F AND K BOARDS REMOVAL
1Four screws
(+BVTP 3x12)
3Four screws
(+BVTP 3x12)
2G1 board
6G bracket assy
4G2N board
5Six screws
(+PSW 4x8)
2F board
7K board
4F bracket
3Three screws
(+PSW 3x6)
1Two screws
(+PSW 3x6)
5Two screws
(+PSW 3x6)
8Four screws
(+PSW 4x16)
6Shield K upper
9Shield K bottom

KDE-50XS955 (UC) 1-6
1-10. H1U BOARD REMOVAL
1-11. H2 AND QH BOARDS REMOVAL
1Two screws
(+BVTP 3x12)
3Two screws
(+BVTP 3x12)
2Control panel ASSY
4H1U board
8Connector panel ASSY
1Four screws
(+BVTP 3x12)
6Screw
(+BVTP 3x12)
6Screw
(+BVTP 3x12)
4Two screws
(+BVTP 3x12)
3QH board
5H2 board
2Screw
(+PSW 3x10)
7Screw
(+PSW 3x10)

KDE-50XS955 (UC) 1-7
1-12. PLASMA DISPLAY PANEL ASSY REMOVAL
3Fan DC
4Bracket fan
3Fan DC
3Fan DC
qa Side plate
7Bottom plate
qd Spaker(L)
qf Four screws
(+BVTP 4x16)
qg Side plate
8Four screws
(+P 4x16)
9Speaker(R)
qh Twelve screws
(+PSW 4x8)
qj Plasma display panel assy
1Four screws
(+PSW 3x6)
6Two screws
(+PSW 3x6)
1Two screws
(+PSW 3x6)
2Two screws
(+PSW 4x8)
1Four screws
(+PSW 3x6)
5Two screws
(+BVTP 4x16)
0Four screws
(+BVTP 4x16)
qs Four screws
(+P 4x16)

KDE-50XS955 (UC) 1-8E
1-13. H3 AND H4 BOARDS REMOVAL
1H4 board
2H3 board
1-14. H5 BOARD REMOVAL
6H5 board
2Corner bracket
4Front frame
1Two screws
(+BVTP 4x16)
5Screw
(+BVTP 3x12)
3Two screws
(+BVTP 4x16)

KDE-50XS955 (UC) 2-1
SECTION 2
ADJUSTMENTS and TROUBLESHOOTING
2-1. WHITE BALANCE ADJUSTMENT
When the Panel or DE1 Board is replaced or is repaired, W/B
should be adjusted.
2-1-1. Measurement equipment
1. Color analyzer (CA-100 manufactured by MINOLTA)
2. Signal generator (ASTRO DESIGN VG-828D)
2-1-2. Measuring procedure
1. Dab the W/B adjustment jig (CA-100) at the glass face of the
panel.
2. Connect the Signal generator (VG-828D) to the component
terminal.
3. Input All-white signal (70%).
4. Make the settings as follows.
• Set the quality mode to PRO.
• Set the PICTURE to MAX.
• Set the Color corrector to Low.
5. Set the color temp, be adjusted cool.
6. Adjust the color temperature of the “highlight” side with the
following items of side mode menu, fixed a value of one of
RGBs 512.
There are 3 mode (COOL, NEUTRAL, WARM):
MODE COLOR TEMPERATURE W/B
COOL 13550K + OMPCD 4
NEUTRAL 9300K + 8MPCD 2
WARM 8000K + 8MPCD 1
*Operation Register
Service mode “27 MAIN _WB”
5 : GAINR
6 : GAING
7 : GAINB
7. Adjust Cool, Neutral, Warm of each color temperature.
Adjustment target values:
MODE X Y
COOL 0.2684 ± 0.003 0.2700 ± 0.003 13550K + 0MPCD
NEUTRAL 0.2849 ± 0.003 0.2931 ± 0.003 9300K + 0MPCD
WARM 0.2951 ± 0.003 0.3044 ± 0.003 8000K + 0MPCD
2-1-3. Service Mode
1. How to Enter Service Mode
1) Turn on the main power switch to place this set in standby
mode. (The LED will light red.)
2) Press the buttons on the commander as follows to enter
service mode.
2. Press the JUMP key on the commander three times.
3. How to Adjust
“27 MAIN_WB”
Category name.
(Can be changed with the 2 and 5 keys on the commander.)
5 GAINR 512 Data Can be changed with the 3 and
6 keys on the commander.
Item Name
Item No.
4. After the adjustment is completed, save the data using the
MUTE and ENTER keys.
Can be changed with the 1 and
4 keys on the commander.
Enter the
“Service mode”
5
(VOLUME +)(DIGIT 5)(DISPLAY) (POWER)

KDE-50XS955 (UC) 2-2
2-2. TROUBLESHOOTING
Twin View
Problem Possible Remedies
I cannot get Twin View to work sIf you are using a cable box to unscramble all channels (as shown on page 26), you
cannot use the Twin View feature. This is because the cable box can unscramble
only one channel at a time. But if you need the cable box to unscramble only some
(usually premium) channels, you can use Twin View for unscrambled channels if
you connect both a cable and cable box, as shown on page 25.
sYou can use Twin View to view a signal from a different source that is connected to
the TV's A/V jacks (such as a VCR or DVD player) in the second window by
pressing the TV/VIDEO button while in Twin View.
sDigital sources, as well as any sources connected to the VIDEO 4, VIDEO 5,
VIDEO 6 inputs, display in the left window, but not in the right windows.
There is no Twin View window,
or it is just static
sBe sure the Twin View window is set to a video input or channel that has a signal
airing.
sYou might be tuned to a video input with nothing connected to it. Try cycling
through the video inputs by pressing the TV/VIDEO button.
Twin View cannot display
anything but TV channels
sTry cycling through the video inputs by pressing the TV/VIDEO button. Check
that the Label Video Inputs option is not set to Skip. (See the Setup Menu on
page 105.)
Twin View displays the same
program in both windows
sBoth Twin View windows might be set to the same channel. Try changing channels
in either window.
Remote Control
CableCARD™
Problem Possible Remedies
Remote control does not operatesThe batteries could be weak. Replace the batteries.
sCheck the orientation of the batteries.
sPress the TV (FUNCTION) button. You may have inadvertently pressed the
SAT/CABLE (FUNCTION) button, which changes the remote control to SAT or
CABLE mode.
sMake sure the TVís power cord is connected securely to the wall outlet.
sLocate the TV at least 3-4 feet away from fluorescent lights.
Cannot change channels with
the remote control
sIf you are using the TV to change channels, first press the TV (FUNCTION)
button.
sIf you are using another device to change channels, be sure you have not
inadvertently switched your TV from the channel 3 or 4 setting. Use the Channel
Fix option to ìfixî the channel based on the hookup you used (see page 99).
sIf you are using another device to change channels, be sure to press the
FUNCTION button for that device. For example, if you are using your cable box
to change channels, be sure to press the SAT/CABLE (FUNCTION) button.
Remote control does not operate
non-Sony video equipment
sIf you replaced the batteries to the remote recently, the code numbers for the video
equipment may need to be reset.
sThere may be more than one code for the equipment that you are attempting to
operate.
sThere is a possibility that some non-Sony equipment cannot be operated by your
Sony TV remote.You may need to use the equipmentís original remote control.
Problem Possible Remedies
Problems using CableCARD
™
or CableCARD
™
services
sCheck that the CableCARD
™
is inserted properly (see page 51).
sThe CableCARD
™
must be activated by your local cable TV provider before you
can receive digital cable TV services. See the activation instructions on page 51.
sCheck the Diagnostics and CableCARD
™
menu options (see page 108). (This
can be useful in providing information to an authorized technician or repair
person.)
sContact your cable TV provider.

KDE-50XS955 (UC) 2-3
Channels
Problem Possible Remedies
Cannot receive upper channels
(UHF) when using an antenna
sPress ANT to select the VHF/UHF input (see page 57).
sUse Auto Program in the Channel Menu to add receivable channels that are not
presently in the TVís memory (see page 99).
TV is fixed to one channel sUse Auto Program in the Channel Menu to add receivable channels that are not
presently in the TVís memory (see page 99).
sCheck your Channel Fix settings (see page 99).
Cannot receive any channels
when using cable TV
sUse Auto Program in the Channel Menu to add receivable channels that are not
presently in the TVís memory (see page 99).
sPress ANT to select the CABLE input (see page 57).
Cannot receive or select
channels
sUse Auto Program in the Channel Menu to add receivable TV channels that are
not presently in TV memory (see page 99).
Some digital cable channels are
not being displayed
sCertain cable TV companies have limitations on the broadcast of digital cable
channels. Check with your cable TV company for more information.
sCheck with your cable TV company if the channels are scrambled or encrypted.
You will need a CableCARD or a separate set-top box to view those channels.
sSome optional digital cable broadcast formats may not be supported. If your cable
TV company is broadcasting digital signals in unsupported broadcast formats, you
will need a separate set-top box provided by your cable TV company to view those
channels.
sThe digital cable channel may be set to Hide in the Channel Menu (see page 99).
sUse the Digital Channels feature to search for new digital channels (see page 99).
Memory Stick
Problem Possible Remedies
Image does not display/Cannot
see all files
sMake sure the image file is a JPEG (.jpg, .jpeg) file or an MPEG1 (.mpg, .mpeg)
file.
sMake sure the Memory Stick is inserted properly (see page 78).
sCheck the Filter option setting (see page 89).
sCheck the Select Folder setting (see page 89) and ensure that files are either in
DCF directories if Digital Camera Folders is selected (see page 89), or in the
currently selected folder if Select a Folder is selected (see page 89).
sThe maximum number of files the Memory Stick Viewer can display is 2,000 files
total, including all JPEG, MPEG1, and MP3 files.
sIf you are using a Memory Stick with the Memory Select function, try changing
the position of the A/B select switch.
JPEG image displays
undesirable motion or flicker in
full screen
sJPEGs captured using a digital video camera may appear to display motion in full
screen. This is a result of the way digital video cameras record still images, and is
not a result of a malfunction with the TV.
Rotation not saved after
Memory Stick is ejected or
Memory Stick Viewer is closed
sThe Memory Stick might be locked. Unlock the Memory Stick and try rotating the
image again.
sThe file might not have information (EXIF data) that is usually generated when a
digital camera records a photo. In this case, it is not possible to save the rotation.
sThere might be insufficient space on the Memory Stick to save the rotated file. Try
deleting one or more files and rotating the image again.
Cannot show (or hide) file
information in full screen or
Slide Show
sSet the File Information option to On or Off (see page 88).
Cannot set print quantity sThe Memory Stick might be locked. Unlock the Memory Stick and try rotating the
image again.
Cannot see Menu sPress Vto display the Menu again.
Cannot hear audio while using
Memory Stick
sCheck the TVís volume or Speaker (page 96) settings.
sTo hear JPEG voice memo in full screen view, select the Digital Camera Folders
option and set the Filter option to Show All Print Marks.
sCheck that the Music option is not to set to Off (see page 88).
Not all MP3 files on Memory
Stick are included when the
Music /Complete Listoption is
selected (page 88)
sThe Memory Stick Viewer can display a maximum of 2,000 files total, including
all JPEG, MPEG1, and MP3 files.
sMake sure that the file is named with the file extension (.mp3).
Cannot see MP3 list to play
music
sMP3 files on your Memory Stick only can be played as background music during a
Slide Show (see page 88).
MP3 file does not play back
correctly
sThe Memory Stick Viewer supports only MP3 files with a fixed data rate of
128 kbps (kilobits per second).

KDE-50XS955 (UC) 2-4
MP3 files on the Memory Stick
are not listed
sOnly MP3 files that are named with the file extension (.mp3) are displayed in the
list.
Music files are playing in wrong
order
sMP3 files are played in alphabetical order, according to the folder in which they
are stored. If you want to change the playlist order, rename your files
alphabetically in the order in which you want them to play.
MPEG1 movie does not play
back correctly
sSome variations of MPEG1 movies may not be compatible withthe Memory Stick
Viewer.
A udio
MPEG1 quality is poor when
enlarged (page 86)
sThe quality of the movie when enlarged depends on the resolution of the MPEG1
file. See your cameraÌsinstruction manual for details.
Error message is displayed sNo Memory Stick There is no Memory Stick in the slot.
sMemory Stick
Locked The lock mechanism on the Memory Stick is engaged.
sMemory Stick Error The Memory Stick in the slot might be damaged; try a
different Memory Stick.
sFormat Error The Memory Stick may have been formattedusing a PC
or other device that is not compatible with cameras.
Error icon is displayed The file is not a valid MPEG1 or JPEG format, or it is a
progressive JPEG (which is not supported).
The thumbnail is not DCF-compatible.
The file is a JPEG or an MPEG1, but the thumbnail is
unreadable.
The file is unreadable.
Problem Possible Remedies
Problem Possible Remedies
Good picture, no sound sPress MUTING so that the word Muting disappears from the screen (see page 56).
sMake sure the Speaker option is set to On in the Audio Menu (see page 96).
sMake sure the MTS option is set to Stereo or Mono (see page 95).
Cannot gain enough volume
when using a cable box
sIncrease the volume of the cable box using the cable boxís remote control. Then
press TV (FUNCTION) and adjust the TVÌs volume.
Sound seems weak or
insufficient
sThe TVís audio might be set to Auto SAP or Mono, when it might be better set to
Stereo. In the Audio Menu (see page 95), set the MTS setting to Stereo. If
already set to Stereo, switch to Mono (which may reduce background noise
during weak stereo broadcasts).
Cannot raise the volume on
external audio speakers
sIf the Speaker option is set to Off and the Audio Out option is set to Fixed (in
order to output the sound to your audio system) use your audio receiver to adjust
the sound (see page 96). Or, to use the TV remote control, set the Audio Out
option to Variable.
sTo turn on the TV speakers, set the Speaker option to On (see page 96).

KDE-50XS955 (UC) 2-5
Video
Problem Possible Remedies
No picture (screen not lit), no
sound
sIf your TV does not turn on, and a red light keeps flashing, your TV may need
service. Call your local Sony Service Center.
sMake sure the power cord is plugged in.
sPress the POWER button on the right side of the TV.
sPress the TV/VIDEO button to cycle through the connected video sources.
sTry another channel; it could be station trouble.
Dark, poor or no picture (screen
lit), good sound
sAdjust the Picture option in the Video Menu (see page 92).
sAdjust the Brightness option in the Video Menu (see page 92).
sCheck the antenna/cable connections.
No color./Dark picture./
Color is not correct.
sPress the PICTURE (MODE) button to select the desired Picture mode
(see page 56).
sAdjust the Color option in the Video Menu (see page 92).
Only snow and noise appear on
the screen
sCheck the antenna/cable connections.
sTry another channel; it could be station trouble.
sPress ANT to change the input mode (see page 57).
Dotted lines or stripes sAdjust the antenna.
sMove the TV away from noise sources such as cars, neon signs, or hair-dryers.
Double images or ghosts sUsing a highly directional outdoor antenna or a cable may solve the problem.
Striped noise during
playback/recording of a VCR
sVideo head interference. Keep your VCR away from the TV.
sLeave a space of 30 cm (11 7/8 inches) between your VCR and the TV to avoid
noise.
sAvoid installing your VCR in front of the TV or at the side of the TV.
Image left on screen sPerform image retention recovery. (see page 98)
sUse the Screen Saver function (see page 98).
The screen flickers when
turning on the TV.
sThis is caused by feature of the Plasma Display Panel, and does not indicate a
malfunction of the TV.
ìBlack boxî on screen sYou have selected a text option in the Setup Menu and no text is available. (See
page 104 to reset Setup selections.) To turn off this feature, set the Caption Vision
option to Off. If you were trying to select closed captioning, select CC1 instead of
TEXT 1-4.
Bars appear at the top and
bottom of the screen
sSome wide-screen programs are filmed in aspect ratios that are greater than 16:9,
such as 2.35:1. (This is especially common with theatrical releases). Your TV will
show these programs with bars at the top and bottom of the screen. For more
details, check the documentation that came with your DVD (or contact your
program provider).
Certain programs on DVD or
other digital sources display a
loss of detail, especially during
fast-motion or dark scenes
sThe compression used by certain digital broadcasts and DVDs may cause your
TVís screen to display less detail than usual, or cause artifacts (small blocks or
dots, pixelations) to appear on your screen. This is due to your TVís large screen
and ability to show very fine detail, and is normal for certain digitally recorded
programs. Adjust the reality/clarity in the DRC Palette option (see page 93) to
optimize the picture while viewing these sources.

KDE-50XS955 (UC) 2-6E
General
Problem Possible Remedies
How to reset TV to factory
settings
sTurn on the TV. While holding down the RESET button on the remote control,
press the POWER button on the right side of the TV. (The TV will turn itself off,
then back on again.) Release the RESET button.
How to restore Video settings to
factory settings
sPress the RESET button on the remote control while in the Video Menu (see page
92).
How to restore Audiosettings to
factory settings
sPress the RESET button on the remote control while in the Audio Menu (see page
95).
Cannot cycle through the other
video equipment connected to
the TV
sBe sure the Label Video Inputs option is not set to Skip (see page 105).
Cannot operate Menu sIf a Menu option appears in gray, this indicates that the TV is in a state in which
the Menu option is not available.
Lost password sIn the password screen (see page 101), enter the following master password: 4357.
The master password clears your previous password; it cannot be used to
temporarily unblock channels.
TIMER LED on front panel is lit sThe LED (see page 16) blinks when the TV is turned on, then shuts off when the
picture is displayed. If the LED blinks continuously, this may indicate the TV
needs service. When lit, indicates that the timer is set (page 107). When the timer
is set, this LED will remain lit even when the TV is turned off.
Digital cable box does not work sIf you are connecting a VCR and digital cable box using a splitter, as described on
page 32, you must use a special bi-directional splitter that is designed to work with
your digital cable box. Contact your cable TV company for details.
Cannot record digital channels
to VCR
sOnly analog channels can be recorded to your VCR.