Sony KDL-22EX425 / KDL-32EX425 / KDL-32EX525 / KDL-40EX525 / KDL-46EX525 Service Manual ▷ View online
KDL-22EX425/32EX425/32EX525/40EX525/46EX525 31
SECTION 4 - TROUBLESHOOTING
2X Blink - Main Power Error
A loss of REG12V from the power supply triggers this protect
A loss of REG12V from the power supply triggers this protect
event. This symptom is usually remedied by replacing the power
supply board. If the error continues after the power supply board
is replaced, suspect excessive loading which is causing the power
supply to shut down. This is usually caused by a failure of the inverter
circuits. Unplug the inverter and turn the TV back on. If a 6X error is
displayed, the inverter (or LCD panel) must be replaced.
3X Blink- DC Regulator/Audio Error
The first thing to check when a 3X blink protection mode occurs is
3X Blink- DC Regulator/Audio Error
The first thing to check when a 3X blink protection mode occurs is
the physical condition of the speakers and speaker connections. The
speakers should measure 8 ohms. Shorted speakers or connections
can cause a 3X blink protection mode.
If the speakers and connections check okay, then the defective
If the speakers and connections check okay, then the defective
component is on the main board. Either an open F4200, defective
DC Regulator, or defective Audio amplifier will cause a 3X blink
protection mode which would require replacing the main board.
A defect on the Power Supply Board may also cause a 3X blink
A defect on the Power Supply Board may also cause a 3X blink
protection mode and shut-off. Check the AU12V level at CN6704/pin
14. If 0V is measure before shut-off the power supply board needs
to be replaced.
5X Blink - TCON Error
A communications error with the timing control circuits (TCON) has
5X Blink - TCON Error
A communications error with the timing control circuits (TCON) has
occurred. If the TCON is available for replacement, replace the
TCON. If the TCON is not available, the LCD panel must be replaced
since the TCON circuit is part of the LCD panel assembly. In rare
cases a loose or defective LVDS cable could also be the cause.
6X Blink - Backlight System Failure
If the inverter circuits fails to generate high voltage or one or more
If the inverter circuits fails to generate high voltage or one or more
of the backlight lamps fails to light, the television will shut down
and display this diagnostics error. Observing for the presence of
backlighting is crucial in determining which component is likely at
fault.
If the backlights turn on before the 6X shutdown occurs, it is safe
If the backlights turn on before the 6X shutdown occurs, it is safe
to assume that the inverter circuits are functioning and one of the
lamps failed to ignite. Replacing the LCD panel is necessary. If the
backlights never turn on before the 6X shutdown, the inverter has
failed. If the inverter is available for replacement, replace the inverter.
If the inverter is not available, replace the LCD Panel.
7X Blink - Temperature Failure
A digital thermometer IC located on the main board provides a
7X Blink - Temperature Failure
A digital thermometer IC located on the main board provides a
temperature reading of the chassis and LCD panel. If the temperature
exceeds a pre-determined point the TV will shut down. If this problem
occurs immediately at turn-on, the temperature sensing IC has failed
and replacing the main board is required. If this occurs after the TV
has been running for a while, check for ventilation issues that could
cause the TV to run hotter than normal.
8X Blink – Not listed in Self Check
8X blink code is mainly used during TV software development. Look
8X Blink – Not listed in Self Check
8X blink code is mainly used during TV software development. Look
in TV’s service SELF CHECK for error code history and notice at the
bottom of the list WDT (Watch Dog Timer) error codes, in particular
notice 103 HOST_WDT.
KDL-22EX425/32EX425/32EX525/40EX525/46EX525 32
SECTION 4 - TROUBLESHOOTING
DIAGNOSTIC CODE DESCRIPTIONS
The Diagnostic Table provides an overview of the number of times the standby LED blinks and the possible location.
Diagnostic Item
Diagnostic Item
Description
Number of times
Standby LED blinks
Possible Location
MAIN_POWER
Main Power Error
2
G1 (Power) Board (KDL-22EX425 Only)
GE2 (Power) Board (KDL-32EX425/32EX525 Only)
GE3 (Power) Board (KDL-40EX525/46EX525 Only)
DC_ALERT
DC Regulator/Audio Error
AUD_PROT
Audio Error Detection
BALANCER
Balancer Error
4
BATS Board (KDL-22EX425 Only)
BATV Board (For All Except KDL-22EX425)
TCON ERR
TCON Error
P_ID_ERR
Panel ID NVM Error
BACKLITE
Backlight Error
6
BATS Board (KDL-22EX425 Only)
BATV Board (For All Except KDL-22EX425)
TEMP_ERR
Temperature Error
7
Ventilation
BATS Board (KDL-22EX425 Only)
BATV Board (For All Except KDL-22EX425)
103 HOST_WDT Watch Dog Timer Notification
8
Service Bulletin (See Appendix Section)
Software Update
3
BATS Board (KDL-22EX425 Only)
BATV Board (For All Except KDL-22EX425)
5
TCON Control MT Board
FIGURE 4-3. DIAGNOSTIC TABLE
NOTE: To provide information to customers regarding how to use their TV, features or FAQs, refer the customer to the imanual on their TV.
KDL-22EX425/32EX425/32EX525/40EX525/46EX525 33
SECTION 4 - TROUBLESHOOTING
VIEWING THE SELF CHECK DIAGNOSTIC HISTORY
It is possible to bring up past occurrences of a failure for confirmation
on the Self Check diagnostic history screen. This feature is useful for
failures which are intermittent or when the customer is not sure what
is causing the television to shut down.
1. TV must be in standby mode. (Power off).
2. Press the following buttons on the Remote Commander
within a second of each other:
3.
DISPLAY
Channel
5
Volume
-
POWER
* NOTE: This differs from accessing Service Adjustments Mode
(Volume +)
Total operation time by hour (MAX:65535)
Boot count (MAX:65535)
Panel operation time by hour (MAX:65535)
Total operation time by hour (MAX:65535)
Boot count (MAX:65535)
Panel operation time by hour (MAX:65535)
-------------- -------------- -------------- 01
-------------- -------------- -------------- 00
-------------- -------------- -------------- 00
-------------- -------------- -------------- 00
-------------- -------------- -------------- 00
-------------- -------------- -------------- 00
002 MAIN_POWE
003 DC_ALERT
003 AUD_PROT
004 BALANCER
005 HFR_ERR
005 P_ID_ERR
12345-00333-06789
12345
-
00333
-
06789
-
-
-------------- -------------- -------------- 00
006 VLED
-------------- -------------- -------------- 00
005 TCON_ERR
-------------- -------------- -------------- 00
-------------- -------------- -------------- 00
-------------- -------------- -------------- 00
-------------- -------------- -------------- 00
006 BACKLITE
007 TEMP_ERR
010 EMITTER
-------------- -------------- -------------- 00
007 FAN_ERR
-------------- -------------- -------------- 00
012 IA
-------------- -------------- -------------- 00
SELF CHECK
StandBy LED Flash Count
Diagnostic Item
Diagnostic Item
Error Count
(00-99)
-------------- -------------- -------------- 00
-------------- -------------- -------------- 00
101 VPC_WDT
-------------- -------------- -------------- 00
102 MEPS_WDT
-------------- -------------- -------------- 00
103 HOST_WDT
-------------- -------------- -------------- 00
104 STBY_WDT
-------------- -------------- -------------- 00
000 RGB_SEN
000 RESERVED
000 RESERVED
FIGURE 4-4. SAMPLE SELF CHECK DIAGNOSIS PAGE
CLEARING THE SELF CHECK DIAGNOSTIC LIST
Since the diagnostic results displayed on the screen are not
automatically cleared, always check the self-diagnostic screen after
you have completed the repairs to be sure you have cleared the
result display to “0”.
1. To clear the Error history and Error count
press
8
0
.
RESETTING THE LCD PANEL OPERATING HOURS
The 3 sets of numbers displayed on the lower left corner of the screen
indicates the total accumulated operating hours of the television and
the operating hours of the LCD panel. Total operating hours is on the
left, boot count in the center and panel hours in the right group (The
center numbers are not used.)
1. To clear the LCD Panel operating hours of the LCD
Panel after replacing the panel, press
7
0
.
EXITING THE SELF CHECK DIAGNOSTIC SCREEN
1. 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.
KDL-22EX425/32EX425/32EX525/40EX525/46EX525 34
SECTION 5 - FLOW CHARTS AND DIAGRAMS
OVERVIEW
The following flow charts provide information to determine what repair parts to order based on the TV error.
DIAGNOSING THE ERROR
Use the Overall Flowchart to determine which flowchart to review to find a solution.
START
Does the Power Led
stay on when the
TV is switched on ?
Is the Standby Led
blinking?
Is the Picture and
Sound OK?
END
See
No Power
See
Standby LED Blinking
See
No Picture or No Sound
Is the network
connection OK?
See
Network Not Connecting
No
Yes
Yes
No
Yes
Do the buttons
on the TV & Remote
Commander work
properly?
See
TV/Remote Commander
Buttons Not Working
No
No
Yes
No
Yes
No
See
Skype Accessory
Not Working
No
Is the Skype
functioning OK?
Yes
FIGURE 5-1. OVERALL FLOWCHART
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