Sony KDL-46XBR10 / KDL-52XBR10 Service Manual ▷ View online
KDL-46/52XBR10 (UC) 6
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
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.
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.
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.
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.
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.
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.
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.
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.
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).
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.
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).
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
Parts on Set
0.15 µF
Earth Ground
AC
Voltmeter
(0.75V)
Voltmeter
(0.75V)
Trouble Light
AC Outlet Box
Ohmmeter
Cold-water Pipe
FigureA. Using an AC voltmeter to check AC leakage.
Figure B. Checking for earth ground.
KDL-46/52XBR10 (UC) 7
SELF DIAGNOSIS FUNCTION
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED will automatically begin to fl ash.
The number of times the LED fl ashes translates to a probable source of the problem.
A defi nition of the STANDBY LED fl ash indicators is listed in the instruction manual for the user’s knowledge and reference.
If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to
reveal past problems and how often these problems occur.
The number of times the LED fl ashes translates to a probable source of the problem.
A defi nition of the STANDBY LED fl ash indicators is listed in the instruction manual for the user’s knowledge and reference.
If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to
reveal past problems and how often these problems occur.
DIAGNOSTIC TEST INDICATORS
When an error occurs, the STANDBY LED will fl ash a set number of times to indicate the possible cause of the problem.
If there is more than one error, the LED will identify the fi rst of the problem areas.
Result for all of the following diagnostic items are displayed on screen.
If the screen displays a “0”, no error has occurred .
If there is more than one error, the LED will identify the fi rst of the problem areas.
Result for all of the following diagnostic items are displayed on screen.
If the screen displays a “0”, no error has occurred .
[DISPLAY UNIT]
Diagnostic Item Detection
Number of times
POWER/STANDBY
LED lamp fl ashes
Possible Location
Main Power Error
2 times
GD1 Board, QTM Board
DC_ALERT1
3 times
GD1 Board, QTM Board
PANEL ALERT
5 times
Not used in these models
Inverter Error
6 times
LCD Panel, QTM Board
Internal Temperature Error
7 times
QTM Board, LCD Panel
Audio Error
8 times
GD1 Board, QTM Board
Fan Error
9 times
Not used in these models
FRC/ACK Error
12 times
LCD Panel, QTM Board
Backlight Balance Error
13 times
Not used in these models
TCON Error
14 times
LCD Panel, QTM Board
Wireless Error
16 times
Wireless Module Sink
[MEDIA RECEIVER (MBT-WZ5)]
Diagnostic Item Detection
Number of times
POWER/STANDBY
LED lamp fl ashes
Possible Location
Main Power Error
2 times
GB2 Board, BUB Board
5V/3.3V DC Error
3 times
BUB Board
BRORA DC Error
5 times
Wireless Module Source, BUB Board
Internal Temperature Error
7 times
BUB Board
Audio Error
8 times
BUB Board
Fan Error
9 times
Not used in these models
Digital FE/BE Error
10 times
BUB Board
Wireless Error
16 times
Wireless Module Source, BUB Board
RF Module Error
17 times
H3B Board, BUB Board
KDL-46/52XBR10 (UC) 8
DISPLAY OF STANDBY LIGHT FLASH COUNT
[DISPLAY UNIT]
[MEDIA RECEIVER (MBT-WZ5)]
2 times
4 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
LED OFF
2 sec.
[ FLASH COUNT ]
Note: One flash counts is not self-diagnostic.
PIC OFF / TIMER
HD SIGNAL
POWER / STANDBY
2 times
4 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
LED OFF
2 sec.
[ FLASH COUNT ]
Note: One flash counts is not self-diagnostic.
PIC OFF / TIMER
HD SIGNAL
POWER / STANDBY
2 times
4 times
5 times
LED ON 0.5 sec.
LED OFF 0.5 sec.
LED OFF
2 sec.
[ FLASH COUNT ]
Note: One flash counts is not self-diagnostic.
POWER
STANDBY PIC OFF/TIMER
LINK
KDL-46/52XBR10 (UC) 9
SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confi rmed, it is possible to
bring up past occurrences of failure for confi rmation on the screen:
bring up past occurrences of failure for confi rmation on the screen:
[Viewing the Self Diagnostic List]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen
After you have completed the repairs, clear the result display to “0”.
After you have completed the repairs, clear the result display to “0”.
Exiting the Self-diagnostic screen
To exit the Self Diagnostic screen, turn off the power to the TV by pressing the POWER button on the remote or the POWER button on
the TV.
the TV.
SELF DIAG
DC ALERT
003
0
SELF DIAG
ET I 1
0
[ SCREEN DISPLAY (Monitor) ]
[ SCREEN DISPLAY (Media receiver) ]
Push the [JUMP] key
Push the [1] key
Push the [4] key
Push the [JUMP] key
Push the
[JUMP] key
[JUMP] key
5
* : Note that this differs from entering the service mode (volume +)
*
DISPLAY
TV POWER
Channel
Volume
Clearing the Self Check Diagnostic List
1. In Service Mode, press the Channel 8 Channel 0 .
1. In Service Mode, press the Channel 8 Channel 0 .
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