Sony KDL-46BX427 User manual

LCD DIGITAL COLOR TV
SERVICE MANUAL AZ2-EK CHASSIS
MODEL COMMANDER DESTINATION
9-883-858-51
KDL-46BX427 RM-YD066 COLUMBIA LEVEL
3
CONFIDENTIAL
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
CONFIDENTIAL
ELECTRICAL SERVICE MANUAL
INTERNAL ONLY
ORIGINAL MANUAL ISSUE DATE: 4/2011
REVISION DATE SUBJECT
4/27/2011 No revisions or updates are applicable at this time.

2
KDL-46BX427
KDL-46BX427
TABLE OF CONTENTS
SECTION TITLE PAGE
Safety-Related Component Warning ............................................................................................................................................................................... 3
Safety Check-Out...............................................................................................................................................................................................................5
SECTION 1: DIAGRAMS ...................................................................................................................................................................................................6
1-1. CircuitBoardsLocation...................................................................................................................................................................................... 6
1-2. PrintedWiringBoardsandSchematicDiagramsInformation............................................................................................................................ 6
1-3. BlockDiagram.................................................................................................................................................................................................... 8
1-4. ConnectorDiagram............................................................................................................................................................................................ 9
1-5. SchematicsandSupportingInformation..........................................................................................................................................................10
ABoardSchematicDiagram(Page1of18).................................................................................................................................................... 10
ABoardSchematicDiagram(Page2of18).................................................................................................................................................... 11
ABoardSchematicDiagram(Page3of18).................................................................................................................................................... 12
ABoardSchematicDiagram(Page4of18).................................................................................................................................................... 13
ABoardSchematicDiagram(Page5of18).................................................................................................................................................... 14
ABoardSchematicDiagram(Page6of18).................................................................................................................................................... 15
ABoardSchematicDiagram(Page7of18).................................................................................................................................................... 16
ABoardSchematicDiagram(Page8of18).................................................................................................................................................... 17
ABoardSchematicDiagram(Page9of18).................................................................................................................................................... 18
ABoardSchematicDiagram(Page10of18).................................................................................................................................................. 19
ABoardSchematicDiagram(Page11of18)..................................................................................................................................................20
ABoardSchematicDiagram(Page12of18).................................................................................................................................................. 21
ABoardSchematicDiagram(Page13of18).................................................................................................................................................. 22
ABoardSchematicDiagram(Page14of18).................................................................................................................................................. 23
ABoardSchematicDiagram(Page15of18).................................................................................................................................................. 24
ABoardSchematicDiagram(Page16of18)................................................................................................................................................... 25
ABoardSchematicDiagram(Page17of18).................................................................................................................................................. 26
ABoardSchematicDiagram(Page18of18).................................................................................................................................................. 27
G3BoardSchematicDiagram......................................................................................................................................................................... 29
HBoardSchematicDiagram............................................................................................................................................................................31
SECTION 2: ELECTRICAL PARTS LIST ........................................................................................................................................................................33
APPENDIX A: ENCRYPTION KEY COMPONENTS ..................................................................................................................................................... A-1

3
KDL-46BX427
KDL-46BX427
SAFETY-RELATED COMPONENT WARNING
TherearecriticalcomponentsusedinLCDcolorTVsthatareimportantforsafety.Thesecomponentsareidentiedwithshadingand
!
markontheschematicdiagramsandtheelectricalpartslist.Itisessentialthatthesecriticalpartsbereplacedonlywiththepartnumber
speciedintheelectricalpartslisttopreventelectricshock,re,orotherhazard.
NOTE:Donotmodifytheoriginaldesignwithoutobtainingwrittenpermissionfromthemanufactureroryouwillvoidtheoriginalpartsand
laborguarantee.
USE CAUTION WHEN HANDLING THE LCD PANEL
When repairing the LCD panel, be sure you are grounded by using a wrist band.
WheninstallingtheLCDpanelonawall,theLCDpanelmustbesecuredusingthe4mountingholesontherearcover.
To avoid damaging the LCD panel:
Údonotpressonthepanelorframeedgetoavoidtheriskofelectricshock.
Ú donotscratchorpressonthepanelwithanysharpobjects.
Ú donotleavethemoduleinhightemperaturesorinareasofhighhumidityforanextendedperiodoftime.
Ú donotexposetheLCDpaneltodirectsunlight.
Ú avoidcontactwithwater.Itmaycauseashortcircuitwithinthemodule.
Ú disconnecttheACadapterwhenreplacingthebacklight(CCFL)orinvertercircuit.
(Highvoltageoccursattheinvertercircuitat650Vrms.)
Ú alwayscleantheLCDpanelwithasoftclothmaterial.
Ú usecarewhenhandlingthewiresorconnectorsoftheinvertercircuit.Damagingthewiresmaycauseashort.
Ú protectthepanelfromESDtoavoiddamagingtheelectroniccircuit(C-MOS).
LEAKAGE CURRENT HOT CHECK CIRCUIT
•Avoidcontactwithwaterasitmayashortcircuitwithinthemodule.
•Ifthesurfaceofpanelbecomesdirty,pleasewipeitoffwithasoftmaterial.(Cleaningwithadirtyorroughclothmay
damagethepanel.)
•Ifyouwanttoreplacewiththenewbacklight(CCFL)orinvertercircuit,mustdisconnecttheAC adapterbecausehigh
voltageappearsatinvertercircuitabout650Vrms.
•Handlewithcarewiresorconnectorsoftheinvertercircuit.Ifthewiresarepressedcauseshortandmayburnortake
fire.
Leakage Current Hot Check Circuit
KLV-32U100M (UC) 5

4
KDL-46BX427
KDL-46BX427
Th
e c
i
rcu
i
t
b
oar
d
s use
d
i
n t
h
ese mo
d
e
l
s
h
ave
b
een processe
d
us
i
ng
Lead Free Solder. The boards are identified by the LF logo located
close to the board designation e.g. H1 etc [ see example ]. The
servicing of these boards requires special precautions to be taken as
outlined below.
example
It is strongly recommended to use Lead Free Solder material in order to guarantee optimal quality of new solder joints.
Lead Free Solder is available under the following part numbers :
Due to the higher melting point of Lead Free Solder the soldering iron tip temperature needs to be set to 370 degrees centigrade.
This requires soldering equipment capable of accurate temperature control coupled with a good heat recovery characteristics.
r e b m u n t r a P r e t e m a i D s k r a m e R
9 1 - 5 0 0 - 0 4 6 - 7 m m 3 . 0 g K 5 2 . 0
0 2 - 5 0 0 - 0 4 6 - 7 m m 4 . 0 g K 0 5 . 0
1 2 - 5 0 0 - 0 4 6 - 7 m m 5 . 0 g K 0 5 . 0
2 2 - 5 0 0 - 0 4 6 - 7 m m 6 . 0 g K 5 2 . 0
3 2 - 5 0 0 - 0 4 6 - 7 m m 8 . 0 g K 0 0 . 1
4 2 - 5 0 0 - 0 4 6 - 7 m m 0 . 1 g K 0 0 . 1
5 2 - 5 0 0 - 0 4 6 - 7 m m 2 . 1 g K 0 0 . 1
6 2 - 5 0 0 - 0 4 6 - 7 m m 6 . 1 g K 0 0 . 1

5
KDL-46BX427
KDL-46BX427
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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
touching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antennaterminals,metaltrim,metallizedknobs,screws,
andallotherexposedmetalpartsforACleakage.Checkleakageas
describedbelow.
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
instructions.
2.Abattery-operatedACmilliampmeter.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’s250andSanwaSH-63TRDareexamplesof
passiveVOMsthataresuitable.Nearlyallbattery-operateddigital
multimetersthathavea2VACrangearesuitable(seeFigureA).
How to Find a Good Earth Ground
Acold-waterpipeisaguaranteedearthground;thecover-plate
retainingscrewonmostACoutletboxesisalsoatearthground.Ifthe
retainingscrewistobeusedasyourearthground,verifythatitisat
groundbymeasuringtheresistancebetweenitandacold-waterpipe
withanohmmeter.Thereadingshouldbezeroohms.
Ifacold-waterpipeisnotaccessible,connecta60-to100-watt
trouble-light(notaneonlamp)betweenthehotsideofthereceptacle
andtheretainingscrew.Trybothslots,ifnecessary,tolocatethehot
sideontheline;thelampshouldlightatnormalbrillianceifthescrew
isatgroundpotential(seeFigureB).
To Exposed Metal
Parts on Set
0.15 µF
Earth Ground
AC
Voltmeter
(0.75V)
Trouble Light
AC Outlet Box Ohmmeter
Cold-water Pipe
FigureA.UsinganACvoltmetertocheckACleakage. FigureB.Checkingforearthground.

6
KDL-46BX427
KDL-46BX427
SECTION 1: DIAGRAMS
1-1. CIRCUIT BOARDS LOCATION
H
SWITCH
UNIT
A
TCON
INV
G3
1-2. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS INFORMATION
All capacitors are in µF unless otherwise noted. pF : µµF 50WV or
less are not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise specied.
All resistors are in ohms. kΩ=1000Ω, MΩ=1000kΩ
Indication of resistance, which does not have one for rating
electrical power, is as follows: Pitch : 5mm
Rating electrical power : 1/ 4 W
1/ 4 W in resistance, 1/10 W and 1/16 W in chip resistance.
: nonammable resistor
: fusible resistor
: internal component
: panel designation and adjustment for repair
: earth ground
: earth-chassis
All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10MΩ digital multimeter.
Voltages are DC with respect to ground unless otherwise noted.
Voltage variations may be noted due to normal production
tolerances.
All voltages are in V.
S : Measurement impossibility.
: B+line.
: B-line. (Actual measured value may be different).
: signal path. (RF)
Circled numbers are waveform references.
The components identied by shading and
!
symbol are critical for safety. Replace
only with part number specied.
The symbol indicates a fast operating fuse and is displayed on the component
side of the board. Replace only with fuse of the same rating as marked.
NOTE: The components identied by a red outline and a mark contain condential
information. Specic instructions must be adhered to whenever these components
are repaired and/or replaced.
See Appendix A: Encryption Key Components in the back of this manual.

7
KDL-46BX427
KDL-46BX427
G
D
S
B1 E1
C2
B2 C1E2
2
3
4
5
6
7
8
9
–
1
G
D
S
B2 E2C1
B1 C2
E1
B2 E2C1
B1 C2E1
B2 E2
C1
B1 C2E1
B1 E1
E2
C1(B2)C2
B1
E2
C1
C2
(B2)
E1
(B2)
E1
E2
B1
C2C1
B1
E1
C2
B2
C1
E2
G
SS
D
G
D
B1
E1
C2
B2
C1
E2
B1
E2
C2C1(B2)
E2
B1
C1
C2E1(B2)
C2
B1
C1
E2E1(B2)
C2
B1
C1
E2
B2
E1
C2
Ver.1.6
Transistor
(FET)
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Discrete semiconductor
(Chip semiconductors that are not actually used are included.)
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Source
Source
Anode Anode
(NC)
(NC)
Cathode
Anode
Cathode
Common
Cathode Cathode
Common
Cathode Cathode
Common
Common
Common
Common
Cathode
Anode
Base Emitter
Collector
Base Emitter
Collector
Drain
Gate
Gate
Drain
Device Printed symbol Terminal name Circuit
Terminal name of semiconductors in silk screen
printed circuit ( )
Anode
Anode
Anode Cathode
Anode Anode
Cathode
Transistor
(FET)
Transistor
(FET)
Emitter
Collector
Base
Transistor
Source
Gate
Drain
Cathode
Anode
Anode Cathode
Anode
Anode
*
18
11
17
16
15
14
13
12
10
21
20
19
23
22
REFERENCE INFORMATION
RESISTOR
: RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW NONFLAMMABLE WIREWOUND
: RS NONFLAMMABLE METAL OXIDE
: RB NONFLAMMABLE CEMENT
: ADJUSTMENT RESISTOR
COIL
: LF-8L MICRO INDUCTOR
CAPACITOR
: TA TANTALUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE

8
KDL-46BX427
KDL-46BX427
1-3. BLOCK DIAGRAM

9
KDL-46BX427
KDL-46BX427
1-4. CONNECTOR DIAGRAM
T-CON Board Panel
CN2
CN202
CN8156
CN13
CN17
CN9101IR board
Key Pad board
CN6401
G3
Power Board
Inverter
CN6402
Main board

10
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 1 OF 18)
1-5. SCHEMATICS AND SUPPORTING INFORMATION
A 1/18
DC CONVERTER I
1-857-593-11 <AZ2EK> A-P1
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—

11
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 2 OF 18)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—
A 2/18
DC CONVERTER II
1-857-903-11 <AZ2EK> A-P2

12
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 3 OF 18)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—
A 3/18
INPUT ANALOG VIDEO
1-857-903-11 <AZ2EK> A-P3

13
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 4 OF 18)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—
A 4/16
INPUT ANALOG VIDEO SCART
1-857-903-11 <AZ2EK> A-P4

14
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 5 OF 18)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—
A 5/18
INPUT ANALOG VIDEO D SUB
1-857-903-11 <AZ2EK> A-P5

15
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 6 OF 18)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—
A 6/18
INPUT HDMI
1-857-903-11 <AZ2EK> A-P6

16
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 7 OF 18)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—
A 7/18
INPUT TUNER
1-857-903-11 <AZ2EK> A-P7

17
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 8 OF 18)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—
• •
••••
• • • •
••••
••••
••••
• •
••••••
A 8/18
DVB DMOD MT5135
1-857-903-11 <AZ2EK> A-P8

18
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 9 OF 18)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—
A 9/18
MT5366 DDR II
1-857-903-11 <AZ2EK> A-P9

19
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 10 OF 18)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—
••••••
• •
••••
••••
••••
••••
••••
• •
A 10/18
MT5366 PERIPHERAL/FLASH
1-857-903-11 <AZ2EK> A-P10

20
KDL-46BX427
KDL-46BX427
A BOARD SCHEMATIC DIAGRAM (PAGE 11 OF 18)
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
A
—
B
—
C
—
D
—
E
—
F
—
G
—
H
—
I
—
J
—
A 11/18
MT5366 HDMI INPUT_SW
1-857-903-11 <AZ2EK> A-P11