KDL-46W955A, KDL-55W955A - Sony TV Service Manual (repair manual)

kdl-46w955a, kdl-55w955a service manual
Model
KDL-46W955A KDL-55W955A
Pages
28
Size
4.42 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kdl-46w955a-kdl-55w955a.pdf
Date

Read Sony KDL-46W955A / KDL-55W955A Service Manual online

REPAIR MANUAL
Self Diagnosis
Supported model
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
LCD Digital Color TV
9-883-523-03
RB1G 
Chassis
 
Segment: TE
Version Date 
Subject
1.0  
05/13/2013 
Original Manual Release Date.
2.0 
08/09/2013 
Caution included on Cautions and Warnings Section. Replaced page ii.
3.0 
12/13/2013 
Updated Section 2 - Troubleshooting. Added page 11.
 
 
Updated Section 3 - Repair Information. Replaced pages 13 and 16.
  MODEL 
    COMMANDER 
DESTINATION
KDL-46W955A 
   RM-YD088 
BRAZIL
KDL-55W955A 
   RM-YD088 
BRAZIL
 
 
KDL-55W955A
KDL-46W955A/55W955A i
TABLE OF CONTENTS
Cautions and Warnings ...................................................................................ii
Section 1 - Specifications and Layouts .........................................................1
Specifications ................................................................................................1
Checking the Accessories......................................................................................1
Board Layout .................................................................................................2
KDL-46W955A .......................................................................................................2
KDL-55W955A .......................................................................................................2
Smart Core Block...................................................................................................2
Wire Dressing ................................................................................................3
KDL-46W955A/55W955A ......................................................................................3
Smart Core Block...................................................................................................3
Section 2 - Troubleshooting ...........................................................................4
Diagnosing the Error .....................................................................................4
Viewing the Self Check Diagnosis History ............................................................. 4
Triage Chart ...................................................................................................5
Flowcharts and Diagrams ..............................................................................6
Overall Block Diagram ...........................................................................................6
Power and Control Block Diagram.........................................................................7
No Power Flowchart ..............................................................................................8
Standby LED Blinking Flowchart ...........................................................................9
Video Distortion Flowchart ...................................................................................10
No 3D Viewing Flowchart .................................................................................... 11
Section 3 - Repair Information ......................................................................12
Repairing the TV ..........................................................................................12
Removing the Table-Top Stand ............................................................................12
Removing the Rear Cover ...................................................................................12
Replacing the Main Board ...........................................................................13
Replacing the Power Supply Board .............................................................16
Replacing the Switch Unit ...........................................................................16
Removing the Speakers ..............................................................................16
Removing the Smart Core Block .................................................................16
Section 4 - Exploded View/Part Number Information .................................18
KDL-46W955A/55W955A ............................................................................18
Smart Core Block.................................................................................................20
Connectors ..................................................................................................21
KDL-46W955A/55W955A ....................................................................................21
Smart Core Block.................................................................................................21
Screws .........................................................................................................22
Section 5 - Accessories/Part Number Information .....................................23
Accessories and Packaging ........................................................................23
Miscellaneous ..............................................................................................23
Optional Accessories ...................................................................................23
Remote Commander ...................................................................................23
Appendix A: Encryption Key Components ............................................... A-1
KDL-46W955A/55W955A ii
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, in case of live chassis. 
!
 
SAFETY-RELATED COMPONENT WARNING!!
There are critical components used in LCD color TVs that are important for 
safety. These components are identified with shading and 
!
 
mark on the 
schematic diagrams and the parts list. It is essential that these critical parts 
be replaced only with the part number specified in the parts list to prevent 
electric shock, fire 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 warranty.
ATTENTION!!
For safety reasons, component level repair of the Power Supply Boards 
and/or the Inverter Boards is prohibited. 
CAUTION ABOUT THE LITHIUM BATTERY!!
Replace only with the same or equivalent type. Danger of explosion may 
occur if battery is replaced incorrectly. Exposed battery shoul not be in 
contact with water.
CAUTIONS AND WARNINGS
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 in “Leakage Test”.
KDL-46W955A/55W955A iii
CAUTIONS AND WARNINGS
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.  
Follow the manufacturers’ instructions provided with the tester.
2.  A battery-operated AC milliammeter. 
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. Nearly all 
battery-operated digital multimeters that have a 2 VAC range are 
suitable. (see Figure A)
To Exposed Metal
Parts on Set
0.15 µF
Earth Ground
AC
Voltmeter
(0.75V)
Figure A. Use an AC voltmeter to check AC leakage.
HOW TO FIND A GOOD EARTH GROUND
The cover-plate retaining screw on most AC outlet boxes is at earth ground. 
Verify the AC outlet box retaining screw ground by connecting a 60W to 
100W incandescent (not a neon or fluorescent 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)
Figure B. Checking for earth ground.
Trouble Light
AC Outlet Box
Page of 28
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Here you can read online and download Sony KDL-46W955A / KDL-55W955A Service Manual in PDF. KDL-46W955A / KDL-55W955A service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony KDL-46W955A / KDL-55W955A TV. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.