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KDE61XBR950 (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.

4     KDE61XBR950 (UC)

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.

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.

1.5 k Ω

0.15 µF

KDE61XBR950 (UC)     5

1-1.

DISPLAY UNIT (PDM-6110) ........................... 1-1

1-1-1. REAR COVER REMOVAL ......................... 1-1

1-1-2. G1 BOARD REMOVAL ............................... 1-2

1-1-3. F1 AND K2 BOARDS REMOVAL ............. 1-2

1-1-4. DEM AND K3 BOARDS REMOVAL ......... 1-3

1-1-5. G2 BOARD REMOVAL ............................... 1-3

1-1-6. SPEAKER BOX ASSY REMOVAL ............ 1-4

1-1-7. FILTER GLASS BRACKET

ASSY REMOVAL ......................................... 1-5

1-1-8. R1 BOARD REMOVAL ............................... 1-6

1-1-9. R2 BOARD REMOVAL ............................... 1-6

1-1-10. PLASMA DISPLAY PANEL ....................... 1-7

1-2.

MEDIA RECEIVER UNIT (MBD-XBR950) ... 1-8

1-2-1. TOP COVERS REMOVAL .......................... 1-8

1-2-2. QH BOARD REMOVAL .............................. 1-8

1-2-3. H1, H2, H3 AND H4 BOARDS REMOVAL .. 1-9

1-2-4. G BOARD REMOVAL ................................. 1-9

1-2-5. A BOARD REMOVAL ................................. 1-10

1-3.

CABLE ARRANGEMENTS FOR MEDIA RE

CEIVER UNIT (MBD-XBR950) ...................... 1-11

1-3-1. CN9401 LEAD ARRANGEMENT ON

A BOARD ...................................................... 1-11

1-3-2. i-LINK CABLE ARRANGEMENT .............. 1-11

1-3-3. FAN LEAD, RELAY CABLE, AND PIN CABLE

ARRANGEMENT ........................................... 1-11

1-3-4. CABLE ARRANGEMENTS NEAR

ANTENNA SWITCH .................................... 1-11

1-3-5. CABLE ARRANGEMENTS NEAR

BLOCK .......................................................... 1-12

1-3-6. LVDS CABLE ARRANGEMENT ............... 1-12

2-1.

VS, VD Voltage Adjustment ............................. 2-1

2-2.

White Balance Adjustment ................................ 2-1

3-1.

BLOCK DIAGRAMS ........................................ 3-1

3-1-1. DISPLAY UNIT (PDM-6110) ...................... 3-1

3-1-2. MEDIA RECEIVER UNIT

(MBD-XBR950) ............................................ 3-6

3-2.

FRAME DIAGRAM .......................................... 3-11

3-3.

CIRCUIT BOARDS LOCATION ..................... 3-12

3-3-1. DISPLAY UNIT (PDM-6110) ...................... 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-6110) ...................... 3-13

(1)

Schematic Diagram of F1 Board ................... 3-13

(2)

Schematic Diagrams of DEM Board ............. 3-14

(3)

Schematic Diagram of G1 Board .................. 3-23

(4)

Schematic Diagram of G2 Board .................. 3-25

(5)

Schematic Diagram of K2 Board .................. 3-27

(6)

Schematic Diagram of K3 Board .................. 3-29

(7)

Schematic Diagram of R1 Board ................... 3-30

(8)

Schematic Diagram of R2 Board ................... 3-30

3-4-2. MEDIA RECEIVER UNIT

(MBD-XBR950) ............................................ 3-31

(1)

Schematic Diagrams of A Board ................... 3-31

(2)

Schematic Diagram of G Board .................... 3-36

(3)

Schematic Diagrams of H1 Board ................. 3-38

(4)

Schematic Diagrams of H2 Board ................. 3-39

(5)

Schematic Diagram of H3 and H4 Boards .... 3-41

(6)

Schematic Diagram of IF Board .................... 3-42

(7)

Schematic Diagrams of M Board .................. 3-43

(8)

Schematic Diagram of UD Board .................. 3-49

3-5.

SEMICONDUCTORS ....................................... 3-51

4-1.

DISPLAY UNIT-1 (PDM-6110) ....................... 4-2

4-2.

DISPLAY UNIT-2 (PDM-6110) ....................... 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-6110) ........................... 4-7

4-7.

PACKING MATERIALS FOR

DISPLAY UNIT (MBD-XBR950) .................... 4-8

KDE61XBR950 (UC)     1-1

4 Rear cover

2 Six screws
    (+PSW 5x16)

2 Six screws
    (+PSW 5x16)

1 Six screws
     (+PSW 4x12)

1 Four screws
     (+PSW 4x12)

1 Six screws
     (+PSW 4x12)

1 Four screws
     (+PSW 4x12)

3 Five screws
     (+PSW 3x8)