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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

KDE-50XS955 (UC)     2

Design and specifications are subject to change without notice.

Mass

68.0 kg (149 lb 14 

5

/

8

 oz)

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, P

B

, P

R

)

1

1

Component Video Input

Y: 1.0 Vp-p, 75 ohms unbalanced, sync negative;
P

B

: 0.7 Vp-p, 75 ohms 

P

R

: 0.7 Vp-p, 75 ohms 

CONTROL S (IN)

Mini jack

Mini jack

CONTROL S (OUT)

Digital Audio Optical Output
(PCM/Dolby Digital)

1

Optical 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

/

4

 in)

KDE-50XS955

KDE-50XS955 (UC)     3

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, because of live chassis. The chassis of 
this receiver is directly connected to the ac power line.

!

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. 

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. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur

! 

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

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 V AC range are suit-
able.  (See Fig. A)

Fig. A. Using an AC voltmeter to check AC leakage.

1.5 k Ω

0.15 µF

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.