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SERVICE MANUAL
SPECIFICATIONS
FLAT PANEL COLOR TV
US Model
Canadian Model
Panel System
Plasma Display panel
Display resolution
KDE42XBR950
1024 pixels (horizontal)
× 768 pixels (vertical)
KDE50XBR950
1365 pixels (horizontal)
× 768 pixels (vertical)
Antenna
75 ohm external terminal for VHF/UHF
Television System
NTSC, American TV Standard
Channel Coverage
VHF
2-13
UHF
14-69
DTV
1-999
CATV
1-125
Power Requirements
120V, 60 Hz
Inputs/Outputs
DVI-HDTV
1 terminal, 3.3V T.M.D.S., 50 ohms
The DVI-HDTV input terminal is compliant with the EIA-861 standard and is not
intended for use with personal computers.
Video (IN)
3 total (1 on front panel)
1 Vp-p, 75 ohms unbalanced, sync negative
SVideo (IN)
3 total (1 on front panel)
Y: 1 Vp-p, 75 ohms unbalanced, sync negative
C: 0.286 Vp-p (Burst signal), 75 ohms
Audio (IN)
6 total (1 on front panel)
500 mVrms (100% modulation)
Impedance: 47 kilohm
Component Video Input
2 (Y, PB, PR)
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)
1
minijack
CONTROL S (OUT)
1
minijack
Digital Audio Optical Output
(PCM/Dolby Digital)
1
Optical Rectangular (1)
KDE42XBR950/KDE50XBR950


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2
KDE42XBR950/KDE50XBR950 (UC)
Design and specifications are subject to change without notice.
Mass
Display unit
PDM-4210: 39kg (86 lbs)
PDM-5010: 53kg (114 lbs)
Media receiver unit
MBD-XBR950: 6.5kg (14 lbs 5 oz)
Power Consumption
In Use
Display unit
PDM-4210: 430 W
PDM-5010: 516 W
Media receiver unit
MBD-XBR950: 53 W
In Standby
Under 1.5 W
i.LINK standby
Under 22 W
Supplied Accessories
Media receiver unit
Remote Control (1)
AA (R6) Batteries (2)
AC power code (2)
AC plug holder (1)
Display interface cable (1)
Antenna cable (1)
Cleaning cloth (1)
RM-Y1000
Display unit
Frame bars (2) (KDE61XBR950 only)
Screws (2) (KDE61XBR950 only)
i.LINK
3 total (1 on front panel)
4-pin S400 i.LINK terminal
Variable/Fixed Audio (OUT)
More than 408 mVrms at the maximum volume
setting (Variable)
More than 408 mVrms (Fixed)
Impedance (output): 2 kilohms
Sub woofer (OUT)
phono jack
RF Inputs
2
Screen Size (measured diagonally)
KDE42XBR950
42 inches
KDE50XBR950
50 inches
1
1
Speaker Output
15W
× 2
Dimensions (W
× H × D)
PDM-4210
1352
× 720 × 102 mm
(53 1/4
× 28 3/8 × 4 1/8 in)
PDM-5010
1573
× 856 × 108 mm
(62 1/8
× 33 3/4 × 4 3/8 in)
MBD-XBR950
430
× 79 × 342.8 mm
(17
× 3 1/8 × 13 1/2 in)


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KDE42XBR950/KDE50XBR950 (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!!
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.
! 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.
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
! 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.


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4
KDE42XBR950/KDE50XBR950 (UC)
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
certain that you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly tran-
sistors, 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
examples of a passive VOMs that are suitable. Nearly all bat-
tery operated digital multimeters that have a 2 V AC range
are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
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 AP-
PEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE-
MENTS PUBLISHED BY SONY. CIRCUIT ADJUST-
MENTS THAT ARE CRITICAL FOR SAFE OPERATION
ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE
PROCEDURES WHENEVER 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.
1.5 k
0.15 µF
AC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground


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KDE42XBR950/KDE50XBR950 (UC)
5
TABLE OF CONTENTS
1. DISASSEMBLY ............................................ 1-1
1-1.
DISPLAY UNIT (PDM-4210/5010) ................. 1-1
1-1-1. REAR PANEL REMOVAL .......................... 1-1
1-1-2. F AND K BOARDS REMOVAL .................. 1-2
1-1-3. DEM BOARD REMOVAL ........................... 1-2
1-1-4. G BOARD REMOVAL ................................. 1-3
1-1-5. DISPLAY PANEL ASSY ............................. 1-3
1-1-6. R1 BOARD REMOVAL ............................... 1-4
1-1-7. R2 BOARD REMOVAL ............................... 1-4
1-2.
MEDIA RECEIVER UNIT (MBD-XBR950) ... 1-5
1-2-1. TOP COVERS REMOVAL .......................... 1-5
1-2-2. QH BOARD REMOVAL .............................. 1-5
1-2-3. H1, H2, H3 AND H4 BOARDS REMOVAL 1-6
1-2-4. G BOARD REMOVAL ................................. 1-6
1-2-5. A BOARD REMOVAL ................................. 1-7
1-3.
CABLE ARRANGEMENTS FOR MEDIA RE
CEIVER UNIT (MBD-XBR950) ...................... 1-8
1-3-1. CN9401 LEAD ARRANGEMENT ON
A BOARD ...................................................... 1-8
1-3-2. i-LINK CABLE ARRANGEMENT .............. 1-8
1-3-3. FAN LEAD, RELAY CABLE, AND PIN CABLE
ARRANGEMENT ........................................... 1-8
1-3-4. CABLE ARRANGEMENTS NEAR
ANTENNA SWITCH .................................... 1-8
1-3-5. CABLE ARRANGEMENTS NEAR
BLOCK .......................................................... 1-9
1-3-6. LVDS CABLE ARRANGEMENT ............... 1-9
2. ADJUSTMENTS ........................................... 2-1
2-1.
VS, VD VOLTAGE ADJUSTMENT
(PDM-4210/5010) .............................................. 2-1
2-2.
WHITE BALANCE ADJUSTMENT
(PDM-4210/5010) .............................................. 2-1
3. DIAGRAMS ................................................... 3-1
3-1.
BLOCK DIAGRAMS ........................................ 3-1
3-1-1. DISPLAY UNIT (PDM-4210/5010) ............. 3-1
3-1-2. MEDIA RECEIVER UNIT (MBD-XBR950) .. 3-5
3-2.
FRAME DIAGRAM .......................................... 3-11
3-3.
CIRCUIT BOARDS LOCATION ..................... 3-12
3-3-1. DISPLAY UNIT (PDM-4210/5010) ............. 3-12
3-3-2. MEDIA RECEIVER UNIT (MBD-XBR950) .. 3-12
3-4.
SCHEMATIC DIAGRAMS AND PRINTED
WIRING BOARDS ........................................... 3-12
3-4-1. DISPLAY UNIT (PDM-4210/5010) ............. 3-13
(1) Schematic Diagram of F Board ........................ 3-13
(2) Schematic Diagram of G Board ........................ 3-14
(3) Schematic Diagram of K Board ........................ 3-16
(4) Schematic Diagrams of DEM Board ................ 3-18
(5) Schematic Diagram of R1 and R2 Boards ....... 3-27
3-4-2. MEDIA RECEIVER UNIT (MBD-XBR950) .. 3-28
(1) Schematic Diagrams of A Board ...................... 3-28
(2) Schematic Diagram of G Board ........................ 3-33
(3) Schematic Diagram of H1 Board ..................... 3-35
(4) Schematic Diagram of H2 Board ..................... 3-36
(5) Schematic Diagram of H3 and H4 Boards ....... 3-38
(6) Schematic Diagram of IF Board ....................... 3-39
(7) Schematic Diagrams of M Board ..................... 3-40
(8) Schematic Diagram of UD Board ..................... 3-46
3-5.
SEMICONDUCTORS ....................................... 3-48
4. EXPLODED VIEWS ...................................... 4-1
4-1.
DISPLAY UNIT-1 (PDM-4210/5010) .............. 4-2
4-2.
DISPLAY UNIT-2 (PDM-4210/5010) .............. 4-3
4-3.
MEDIA RECEIVER UNIT-1 (MBD-XBR950) ... 4-4
4-4.
MEDIA RECEIVER UNIT-2 (MBD-XBR950) ... 4-5
4-5.
MEDIA RECEIVER UNIT-3 (MBD-XBR950) ... 4-6
4-6.
PACKING MATERIALS FOR DISPLAY UNIT
(PDM-4210) ........ 4-7
4-7.
PACKING MATERIALS FOR DISPLAY UNIT
(PDM-5010) ........ 4-8
4-8.
PACKING MATERIALS FOR DISPLAY UNIT
(MBD-XBR950) . 4-9
5. ELECTRICAL PARTS LIST ......................... 5-1