Read Sony KDL-24R425A / KDL-32R424A / KDL-32R425A Service Manual online
REPAIR MANUAL
Self Diagnosis
Supported model
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
LCD Digital Color TV
9-883-508-01
RB1TK
Chassis
Segment: BA
Version Date
Subject
1.0
03/28/2013
Original Manual Release Date.
MODEL
COMMANDER
DESTINATION
KDL-24R425A
RM-YD093
BRAZIL
KDL-32R424A
RM-YD093
BRAZIL
KDL-32R425A
RM-YD093
BRAZIL
KDL-32R425A
KDL-24R425A/32R424A/32R425A i
TABLE OF CONTENTS
Cautions and Warnings ...................................................................................ii
Section 1 - Specifications and Layouts .........................................................1
Specifications ................................................................................................1
Board Layout .................................................................................................2
Board Layout .................................................................................................2
KDL-24R425A ........................................................................................................2
KDL-32R424A/32R425A ........................................................................................2
KDL-32R424A/32R425A ........................................................................................2
Wire Dressing ................................................................................................3
KDL-24R425A ........................................................................................................3
KDL-32R424A/32R425A ........................................................................................3
KDL-32R424A/32R425A ........................................................................................3
Section 2 - Troubleshooting ...........................................................................4
Diagnosing the Error .....................................................................................4
Viewing the Self Check Diagnosis History .............................................................4
Triage Chart ...................................................................................................5
Flowcharts and Diagrams ..............................................................................6
Flowcharts and Diagrams ..............................................................................6
Overall Block Diagram ...........................................................................................6
Power and Control Block Diagram.........................................................................7
Power and Control Block Diagram.........................................................................7
KDL-24R425A...................................................................................................7
KDL-32R424A/32R425A...................................................................................8
KDL-32R424A/32R425A...................................................................................8
No Power Flowchart ..............................................................................................9
Standby LED Blinking Flowchart .........................................................................10
No Video Flowchart ............................................................................................. 11
Video Distortion Flowchart ...................................................................................12
Standby LED Blinking Flowchart .........................................................................10
No Video Flowchart ............................................................................................. 11
Video Distortion Flowchart ...................................................................................12
Section 3 - Repair Information ......................................................................13
Repairing the TV ..........................................................................................13
Removing the Table-Top Stand ............................................................................13
Removing the Rear Cover ...................................................................................13
Removing the Rear Cover ...................................................................................13
KDL-24R425A.................................................................................................13
KDL-32R424A/32R425A.................................................................................14
KDL-32R424A/32R425A.................................................................................14
Replacing the Main Board ...........................................................................14
Replacing the Power Supply Board .............................................................18
Removing the Speakers ..............................................................................18
Removing the Speakers ..............................................................................18
KDL-24R425A ......................................................................................................18
KDL-32R424A/32R425A ......................................................................................19
KDL-32R424A/32R425A ......................................................................................19
Removing the Bezel and H Board ...............................................................19
KDL-24R425A ......................................................................................................19
Section 4 - Exploded View/Part Number Information .................................20
KDL-24R425A/32R424A/32R425A .............................................................20
KDL-24R425A .............................................................................................21
KDL-32R424A/32R425A .............................................................................23
Connectors ..................................................................................................25
KDL-24R425A .............................................................................................21
KDL-32R424A/32R425A .............................................................................23
Connectors ..................................................................................................25
KDL-24R425 ........................................................................................................25
KDL-32R424A/32R425A ......................................................................................25
KDL-32R424A/32R425A ......................................................................................25
Screws .........................................................................................................26
Section 5 - Accesories/Part Number Information .......................................27
Accessories and Packaging ........................................................................27
Miscellaneous ..............................................................................................27
Optional Accessories ...................................................................................27
Remote Commander ...................................................................................27
Miscellaneous ..............................................................................................27
Optional Accessories ...................................................................................27
Remote Commander ...................................................................................27
Appendix A: Encryption Key Components ............................................... A-1
KDL-24R425A/32R424A/32R425A 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.
CAUTIONS AND WARNINGS
KDL-24R425A/32R424A/32R425A iii
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.
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”.
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
