Sony KDL-46W705A / KDL-50W705A Service Manual ▷ View online
REPAIR MANUAL
Self Diagnosis
Supported model
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
LCD Digital Color TV
9-883-513-02
RB1G
Chassis
Segment: LS
Version Date
Subject
1.0
04/03/2013
Original Manual Release Date.
2.0
12/05/2013
Updated Section 3 - Repair Information. Replaced pages 13 and 16.
MODEL
COMMANDER
DESTINATION
KDL-46W705A
RM-YD090
BRAZIL
KDL-50W705A
RM-YD090
BRAZIL
KDL-46W705A
KDL-46W705A/50W705A i
TABLE OF CONTENTS
Cautions and Warnings ...................................................................................ii
Section 1 - Specifications and Layouts .........................................................1
Section 1 - Specifications and Layouts .........................................................1
Specifications ................................................................................................1
Checking the Accessories......................................................................................1
Board Layout .................................................................................................2
KDL-46W705A/50W705A ......................................................................................2
Smart Core Block...................................................................................................2
Wire Dressing ................................................................................................3
KDL-46W705A/50W705A ......................................................................................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
No Video Flowchart .............................................................................................10
Video Distortion 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 .................................................................17
Section 4 - Exploded View/Part Number Information .................................18
KDL-46W705A/50W705A ............................................................................18
Smart Core Block ........................................................................................20
Connectors ..................................................................................................21
KDL-46W705A/50W705A ....................................................................................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-46W705A/50W705A 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
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.
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.
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.
and/or the Inverter Boards is prohibited.
CAUTIONS AND WARNINGS
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety
checks before releasing the set to the customer:
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.
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.
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.
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.
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”.
as described in “Leakage Test”.
KDL-46W705A/50W705A 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.
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)
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)
Parte de metal expuesta
del televisor
0.15 µF
Tierra física
Voltímetro
AC
(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
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)
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.
Foco de Prueba
Tomacorriente de CA