Sony WEGA KE-50XBR900, KE-42XBR900 User manual

SERVICE MANUAL
SPECIFICATIONS
KE-50XBR900
FLAT PANEL COLOR TV
US Model
Canadian Model
Panel System Plasma Display panel
Display resolution Display resolution:
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
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
S Video (IN) (1 on front panel) Y: 1 Vp-p, 75 ohms unbalanced, sync negative
C: 0.286 Vp-p (Burst signal), 75 ohms
Audio (IN) (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 (OUT)
Variable/Fixed Audio (OUT) More than 408 m Vrms at the maximum volume
setting (Variable)
More than 408 mVrms (Fixed)
Impedance (output): 2 kilohms
Monitor/Fixed Audio (OUT) ×1
1
1
3 total
6 total

KE-50XBR900(UC) 2
Sub woofer (OUT) 1
2
1
phono jack
RF Input
Converte
Supplied Accessories Remote Control RM-927Y
AAA (LR03) Batteries 2 supplied for remote control
Screen Size (measured diagonally) KE-50XBR900 50 inches
Speaker Output 15W ×2
Dimensions (W ×H ×D) PDM-5000 1573 ×856 ×108 mm
(62
1
/ 8 ×33
3
/ 4 ×4
3
/ 8 in)
MBT-XBR900 430 ×105 ×360 mm
(17 ×4
1
/ 4 ×14
1
/ 4 in)
Desi
g
n and s
p
ecifications are sub
j
ect to chan
g
e without notice.
Mass Display unit
PDM-5000: 53kg (114 lbs)
Media receiver unit
MBT-XBR900: 7.5kg (16 lbs)
Power Consumption Display unit
PDM-5000: 480 W
Media receiver unit
MBT-XBR900: 36 W
In Standby
In Use
Under 1.5 W

KE-50XBR900(UC) 3
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” indication 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 battery operated digital multimeters that have a 2 V AC range
are suitable. (See Fig. A)
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-soldered
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 transistors, 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 recommend 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 B+ and HV to see if they are specified values. Make sure your
instruments are accurate; be suspicious of your HV meter if sets always
have low HV.
8. Check the antenna terminals, metal trim, “metallized” knobs, screws, and
all other exposed metal parts for AC Leakage. Check leakage as
described right.
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µFAC Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SAFETY CHECK-OUT

KE-50XBR900(UC) 4
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.LESRÉGLAGESDECIRCUITDONTL’IMPORTANCEEST
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.
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 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 IM-
PROPER OPERATION IS SUSPECTED.

KE-50XBR900(UC) 5
1. EXPLODED VIEWS
1-1. Display Unit (PDM-5000) ................................... 1-2
1-2. Media Receiver Unit-1 (MBT-XBR900) ............. 1-4
1-3. Media Receiver Unit-2 (MBT-XBR900) ............. 1-6
1-4. Packing Materials for Display Unit
(PDM-5000) ......................................................... 1-7
1-5. Packing Materials for Media Receiver Unit
(MBT-XBR900) .................................................. 1-8
2. ELECTRICAL PARTS LIST ............................... 2-1
TABLE OF CONTENTS
Section Title Page Section Title Page

KE-50XBR900(UC) 1-1
SECTION 1
EXPLODED VIEWS
• Items with no part number and no
description are not stocked because they
are seldom required for routine service.
• The construction parts of an assembled
part are indicated with a collation number
in the remark column.
• Items marked " * " are not stocked since
they are seldom required for routine
service. Some delay should be anticipated
when ordering these items.
The components identified !marked are
critical for safety.
Replace only with the part number specified.
Les composants identifiés par la marque !
sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.

KE-50XBR900(UC) 1-2
1-1. DISPLAY UNIT(PDM-5000)
3
1
2
3
10
8
6
4
35
5
74
10
11
36
13
28
29
8
6
12
#7
#4 #4
#4
#4 #4
#1
#1
#5
#1
#1 #1
#1
#1
#2
#2
#2
#2
#2
#2
#2
#2
#2
#2 #2
#2
#2 #2
#2
#2
#2
#2
#2
#2
#2
#2
#2
#3
#3
#5
#6
#9
#5
#5
#5
#5
30
23
26
25
22
27
14
32
33
24
33
19 20
21 33
15
18
16 17
31
31
17
34
7
5
#8
#8
9
9

KE-50XBR900(UC) 1-3
REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK
1 A-1603-818-D SP (R) ASSY 3-8
2 A-1603-817-D SP (L) ASSY 3-8
3 4-091-706-01 GRILLE, SP
4 1-825-250-11 SPEAKER (5 CM)
5 1-825-251-11 SPEAKER (13X6 CM)
6 4-091-957-01 COVER (A), SCREW
7 1-825-249-11 SPEAKER (13X6 CM)
8 4-091-958-01 COVER (B), SCREW
9 4-091-991-01 BAR
10 4-091-675-01 SCREW, FIXED
11 * A-1401-891-B R2 BOARD, MOUNT
12 4-635-966-01 SCREW (HEX)
13 * A-1401-606-B R1 BOARD, MOUNT
14 2-433-598-01 HOLDER (LT-11U), WIRE
15 4-091-681-01 HOOK
16 * X-4041-100-1 COVER ASSY, REAR 17, 31
17 * 4-091-684-01 GASKET (ER)
18 1-763-961-11 FAN, D.C
19 * A-1401-892-A F2 BOARD, MOUNT
20 3-910-042-01 SPACER (A)
21 4-035-160-01 PURSE LOCK (S) (DIA. 12)
22 * A-1300-778-D G BOARD, COMPLETE
23 1-763-962-11 FAN, D.C
24 4-314-843-02 SCREW, TAPPING, +4X12
25 * A-1401-608-B F BOARD, MOUNT
26 * A-1401-609-B K BOARD, MOUNT
27 * A-1300-780-G P BOARD,COMPLETE
28 2-990-241-02 HOLDER (A), PLUG
29 !1-417-336-11 AC INLET
30 4-662-693-03 GRIP, M2.6 S HEAD(EG)
31 * 4-091-684-11 GASKET (ER)
32 X-4040-983-1 BRACKET (50) ASSY, U
33 4-374-745-11 CUSHION (A)
34 * 1-805-056-11 PLASMA DISPLAY PANEL
35 4-091-702-01 BOX (FL), SP
36 4-091-703-01 BOX (FR), SP
#1 7-682-973-49 +PSW 5X16
#2 7-685-663-79 +BVTP 4X16, TYPE 2, IT-3
#3 7-685-647-79 +BVTP 3X10, TYPE 2, IT-3
#4 7-682-663-09 +PSW 4X12
#5 7-682-948-09 +PSW 3X8
#6 7-685-648-79 +BV 3X12, TYPE 2, IT-3
#7 7-682-667-09 +PS 4X25
#8 7-685-533-19 +BTTP 2.6X6
#9 7-685-167-19 +PTP 4X35

KE-50XBR900(UC) 1-4
1-2. MEDIA RECEIVER UNIT-1(MBT-XBR900)
53
51
55
52
58
57
56
61
B BLOCK ASSY
63
62
65
68
67
69
72
71
73
87
84
80
59
70
86
77
76
85
75
60
78 79
81
64
66
66
66
66
84
66
66
66
74
83
82 83
54
#6
#6
#6
#11
#12
#12#6
#6
#5
#5
#5
#12
#6
#6 #5
#10

KE-50XBR900(UC) 1-5
REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK
51 * A-1401-937-A H3 BOARD, MOUNT
52 X-4040-969-1 PANEL ASSY, FRONT 53-58
53 4-042-192-21 CATCHER, PUSH
54 3-703-035-11 SHAFT, DOOR
55 X-4040-970-2 DOOR ASSY
56 * 4-091-608-01 BUTTON, POWER
57 4-036-405-01 SPRING, COMPRESSION
58 4-045-250-51 DAMPER
59 1-771-787-11 SWITCH, RF ANTENNA
60 * A-1401-660-A U1 BOARD, MOUNT
61 * A-1401-938-A H4 BOARD, MOUNT
62 * A-1401-936-A H1 BOARD, MOUNT
63 * A-1300-807-B A BOARD, MOUNT
64 2-433-598-01 HOLDER (LT-11U), WIRE
65 1-763-659-11 FAN, DC
66 4-382-854-01 SCREW (M3X8), P, SW (+)
67 * 1-555-110-00 P-P CABLE
68 * 1-557-056-31 CABLE, P-P
69 * A-1401-935-A H2 BOARD, MOUNT
70 * A-1401-661-A U2 BOARD, MOUNT
71 * A-1401-934-A AD BOARD, MOUNT
72 * A-1401-662-B AU BOARD, MOUNT
73 * A-1300-944-B M BOARD, MOUNT
74 * A-1401-751-A MS2 BOARD, MOUNT
75 4-087-363-01 COVER, CONNECTOR
76 4-662-693-03 GRIP, M2.6 S HEAD (EG)
77 4-635-966-01 SCREW (HEX)
78 1-543-936-11 CORE (FPC)
79 * 4-091-624-01 PANEL (UC), REAR
80 1-763-962-11 FAN, D.C.
81 3-074-851-01 DAMPER (FAN 25)
82 X-4040-972-1 COVER ASSY, BOTTOM 83
83 3-078-830-01 FOOT
84 4-670-040-01 SCREW
85 3-682-691-00 NUT, WASHER HEXAGON
86 1-580-375-51 INLET 3P
87 * X-4041-313-1 ASSY, COVER TOP
#5 7-682-948-09 SCREW +PSW 3X8
#6 7-685-648-79 SCREW +BVTP 3X12 TYPE2 IT-3
#10 7-682-149-04 SCREW +P 3X10
#11 7-682-961-01 SCREW +PSW 4X8
#12 7-682-951-01 SCREW +PSW 3X14