Sony KLV-46XBR9 / KLV-52XBR9 Service Manual ▷ View online
9
KLV-46XBR9/52XBR9
KLV-46XBR9/52XBR9
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
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.
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 below.
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.
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.
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).
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.
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 F
Earth Ground
AC
Voltmeter
(0.75V)
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.
10
KLV-46XBR9/52XBR9
KLV-46XBR9/52XBR9
SELF-DIAGNOSTIC FUNCTION
Self Diagnosis
Supported model
The units in this manual contain a self-diagnostic function. If an error occurs, the POWER/STANDBY LED indicator 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 POWER/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 POWER/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.
1. Diagnostic Test Indicators
When an error occurs, the POWER/STANDBY LED indicator will fl ash a set number of times to indicate the possible cause of the problem. If there is
more than one error, the indicator will identify the fi rst of the problem areas.
more than one error, the indicator will identify the fi rst of the problem areas.
LED Indicators
PIC OFF / TIMER
POWER
STANDBY
Description of LED Indicators
LED
LED COLOR
DESCRIPTION
PIC OFF/TIMER
Orange or Green
Lights up in orange when the Timer or Sleep is set.
Lights up in green when the Power Saving is set to
Picture Off.
Lights up in green when the Power Saving is set to
Picture Off.
STANDBY
Red
Lights up in red when your TV is in PC power saving
mode.
mode.
POWER
Green or Red
Lights up in green when the TV is turned on. If the LED
blinks in red continuously, this may indicate that the TV
needs servicing.
blinks in red continuously, this may indicate that the TV
needs servicing.
2 times
6 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
LED OFF
3 sec.
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KLV-46XBR9/52XBR9
KLV-46XBR9/52XBR9
POWER/STANDBY LED Diagnostic Description
Diagnostic Item
Description
Number of times
POWER/STANDBY LED
lamp flashes
Possible Location
Main Power
2 times
G7N (Power) Board
DC Alert1
3 times
BR Board
G7N (Power) Board
G7N (Power) Board
DC Alert3
5 times
Not used in these models
Backlight
6 times
BR Board
G7N (Power) Board
Inverter Boards -D1N Board & D2N Board (46"), D3N Board & D4N Board (52")
G7N (Power) Board
Inverter Boards -D1N Board & D2N Board (46"), D3N Board & D4N Board (52")
Temp Err
7 times
BR Board
Audio Prot
8 times
BR Board
Fan Err
9 times
Not used in these models
DTT WDT
10 times
Watch Dog Timer used to track micro processors, not to record errors.
Trident IC
11 times
BR Board
HFR Err
12 times
LCD Panel
Balancer
13 times
LCD Panel
Inverter Boards -D1N Board & D2N Board (46"), D3N Board & D4N Board (52")
Inverter Boards -D1N Board & D2N Board (46"), D3N Board & D4N Board (52")
TCON Err
14 times
LCD Panel
Viewing the Self Check Diagnostic List
1. TV must be in standby mode. (Power off).
2. Press the following buttons on the Remote Commander within a second of each other:
DISPLAY
Channel
5
Volume
-
TV POWER .
The Self Check list displays.
This differs from accessing Service Adjustments.
Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.
DIAGNOSTICS
002 MAIN POWER
001
003 DC ALERT 1
000
005 DC ALERT3
000
012 HFR ERR
000
006 BACKLIGHT
000
007 TEMP ERR
000
008 AUDIO PROT
000
009 FAN ERR
000
010 DTT WDT
000
012 HFR_ERR
000
013 BALANCER
000
014 TCON_ERR
000
00000-00000-00000
SELF CHECK
1 and red text indicates an error was detected
0 and green text indicates no error was detected
Total Hours of Operation
Boot Count
Total Panel Hours
3. To exit Self Check display, turn the power off.
Clearing the Self Check Diagnostic List
1. In Service Mode, press the Channel 8
1. In Service Mode, press the Channel 8
Channel
0 .
Clearing the Panel Operation Time
1. In Service Mode, press the Channel 7
1. In Service Mode, press the Channel 7
Channel
0 .
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KLV-46XBR9/52XBR9
KLV-46XBR9/52XBR9
SECTION 1: DISASSEMBLY
1-1. REAR COVER REMOVAL
1-1-1. REAR COVER REMOVAL (KLV-46XBR9 ONLY)
1 Remove 8 screws from Rear Cover
2 Remove 1 screw from Side Jack position
3 Remove 1 screw from Terminal position
4 Remove 4 screws from VESA positions
5 Remove 3 screws from Bottom Frame positions
6 Carefully lift Rear Cover bottom side and rotate toward top side
7 Release Clamps and remove Rear Cover from Front Cabinet Assembly
NOTE:
The Rear Cover is attached to Front Cabinet Assembly with small Clamps (3 places).
Use caution when removing the Rear Cover not to damage these Clamps.
To re-install the Rear Cover, press the Rear Cover down on Clamps to lock into position.
6
7
Clamps
Front Cabinet Assembly
Rear Cover
Front Cabinet Assembly
Rear Cover
1 Screw,
+BVTP2 4X16
2 Screw,
+BVTP 3X12 TYPE2 IT-3
3 Screw,
+BVTP 3X12 TYPE2 IT-3
4 Screw,
+PSW M5X12
5 Screw,
+PSW M5X12
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