SONY KDL-32EX725 - KDL-40EX725 - KDL-55EX725 – LED BLINKING (Error) CODES and FAULT DETAILS
KDL-32EX725 RM-YD062 CHILE/PERU | KDL-32EX725 RM-YD062 VENEZUELA
KDL-40EX725 RM-YD062 CHILE/PERU | KDL-40EX725 RM-YD062 VENEZUELA
KDL-55EX725 RM-YD062 CHILE/PERU | KDL-55EX725 RM-YD062 VENEZUELA
LED Blinking Codes [Error Codes] & Self Check Function
If an error occurs, the standby
LED will automatically begin to flash. The number of times the LED flashes
translates to a probable source of the problem.
If there is more than one error,
the standby LED will identify the first of the problem areas. If the Self check
screen displays a “0”, no error has occurred.
2X Blink - Main Power Error: A 2X protection mode blink pattern can be
activated due one of the following defects.
* Loss of REG12V (LVP)*
* Loss of -125V (Single Line)
* Excessive -125V Level (OVP)*
* Loss of Power-ON Signal
* Excessive PFC Voltage (OVP)
* Excessive PFC Temperature (OTP)
# Low Voltage Protection (LVP)
# Over Voltage Protection (OVP)
A loss or excessive condition of
the REG12VDC secondary voltage from the main power supply IC6351 will cause a
2X blink pattern on the standby LED. The 12Vdc can be checked at CN6704/pin
16. If the measurement is 0V or rises
above 12Vdc (approaches 15V) before the TV shuts down the Power Supply Board is
defective. If approximately 12Vdc is present and remains below 12Vdc before
shutdown then further troubleshooting is necessary to determine the defective
component. After confirming proper
REG12V levels, check the Negative LED Backlight supply levels. A loss or excessive
condition of the negative supply will cause a 2X blink failure. The voltage
level can be checked at CN6701/pins 1 & 3 before the TV shuts off. There
will be 2 to 4 wires (Red & Blue) depending on the panel size. All
individual wires should be checked for
proper voltage level. In normal operation the voltage level will initially rise
to approximately -175V and then should
Regulate
down to between 89V and
125V depending on the Back light adjustment in the User Menu. If one
of the
negative supplies is 0V or rises above -175V before shut-off then the
Power
Supply Board is defective, replace it to fix the problem. A defective
X-Reality processor on the Main
Board or Switch circuit on the Power Supply Board will cause a loss of
the
Power-ON signal (2X). To determine which component is defective check
the
Power-ON voltage level at CN6704/pin 1. In normal operation 3V should be
measured. If the 3V is present before shut-off then the Power Supply
Board is
defective. If 0V is measured before shut-off then the Main Board is
defective. Finally, there are PFC protection circuits on
the Power Supply Board that when activated will cause a 2X blink
protection
mode. The PFC circuit is monitored for both over-voltage and
over-temperature. Therefore, if all the previously discussed
circuits checkout okay, there could
still be a problem on the Power Supply Board in the PFC circuit causing
the 2X
blink. Replacing the Power Supply Board will fix the TV.
3X Blink- DC Regulator/Audio
Error: The Audio error can occur due on
of the following error conditions.
Defective DC Regulator on Main
Board
Shorted or Damaged Speaker
Connections
Defective Audio Amplifier (Main
Board)
Loss of AU12V (Open F4200 on Main
Board)
Loss of AU12V (Open Fuse on Power
Supply Board)
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 component is on the Main Board. An open F4200, defective DC
Regulator, or defective Audio amplifier will cause a 3X blink protection mode.
In any of these cases, replace the Main Board to fix this condition. A defect on the Power Supply Board can cause
a 3X blink protection mode and shut-off. Check the AU12V level at
CN6704/pin 14. If 0V is measure before 4X Blink – Balancer Error.
The 4X error code is only used on
models incorporating local dimming LED back-lighting. If a failure occurs on the
LD board the TV will shut down and display this diagnostic code. Models using
conventional non-local dimming LED back-lighting do not utilize this error
code.re shut-off the Power Supply Board is defective.
5X Blink - T-CON Error
The 5X blink protection mode
indicates a communications error between the T-CON Board and the X-Reality
microprocessor on the Main Board. If the T-CON is available for replacement,
replace the T-CON. If the T-CON is not available, the LCD panel must be
replaced since the T-CON circuit is part of the LCD panel assembly. In rare
cases a loose or defective LVDS cable could also be the cause.
6X Blink - Back-light System
Failure
NOTE: All models will make two
attempts to power up before a 6X is activated. The SONY logo (Back-light) may or
may not display on the screen. However, the splash tones will be heard two
times. After the second attempt the TV will turn off and the standby LED will
blink a 6X protection mode. (Note: The splash tone may not be heard if it is
turned off or the volume is set to minimum.)
If a 6X blink pattern is activated then a defect has occurred in one of
the following areas.
* Defective Panel LED(s)
* Defective Power Supply
When troubleshooting a 6X
back-light system failure it is key to notice if the back-lights illuminate
before the TV shuts off. The following list shows the possible back-light status
and blink pattern and the possible failed components.
1. Momentary Back-light and 6X: Defective LED(s) (LCD Panel Assy.)
2. No Backlight and 6X: Replace Power Supply
In most cases, if the Sony logo
(Back-light) momentarily illuminates and the TV shuts off and a 6X is activated
than one or more of the back-light LEDs are defective. The LCD Panel assembly
panel must be replaced for a defective LED. However, before replacing the LCD
panel assembly checks for a complete loss of the Negative Back-light (-89V to
-125V) power supply. The -89V to -125V power supply can be checked at
CN6702/pins 1 & 3.
If there is no back-light before
the TV shuts off and activates a 6X, than check the “Back-light ON” signals from
the TV microprocessor and the Positive (+145V) Back-light power supply from the
Power Supply Board. The BL-ON signal can be checked at CN6704/pin 5 and the
+145V at CN6701/pins 1 & 3. If the
“Back-light-ON” signal is okay and the Positive Power supply is missing then the
Power Supply Board is defective. However, if the Back-light-ON is missing then
the X-Reality Microprocessor is defective and the Main Board must be replaced
to repair the problem.
7X Blink - Temperature Failure
These models do not display a
temperature warning OSD dialogue box before shutting off and going into a 7X
standby LED blink pattern. The main objective when a 7X blink pattern occurs is
to determine which of the following possible defects is causing the excessive
temperature condition indication.
Excessive Ambient Room
Temperature
Dust or Debris Blocking the TV
Ventilation Apertures
Defective Temperature Sensor or
X-Reality Microprocessor (Main Board) The first step is to notice how long it
takes the TV to shut off and trigger a 7X blink protection mode. If the TV has an actual excessive temperature
condition it will take a considerable period of time to shut off and indicate a
7X blink protection mode. This is because it will take time for the TV components
to heat up and for the temperature sensor to detect the excessive temperature
and shut the TV off.
If the TV takes a considerable
period of time to shut-off check the following items:
* The TV should not be located too
close to any heating devices.
* The TV should have at least 4
inches of clearance around the sides & rear, and 11 inches of clearance
over the top to ensure adequate ventilation.
* Check that all vented areas on
the TV are clear of all dust and debris.
* If the TV shuts off immediately
after Power-ON then one of the following components has failed (Not an Actual
Excessive Temperature Condition).
# X-Reality Microprocessor (Main
Board)
# Temperature Sensor (Main Board)
In either case the Main Board
must be replaced to fix the problem.
The Diagnostic Table provides an
overview of the number of times the standby LED blinks and the possible
location.
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.
* TV must be in standby mode. (Power off).
* Press the following buttons on the Remote
Commander within a second of each other:
DISPLAY > CHANNEL-5 > VOLUME-[--] > POWER
* NOTE: This differs from
accessing Service Adjustments Mode (Volume +)
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”.
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 centre and panel hours
in the right group (The centre numbers are not used.)
To clear the LCD Panel operating
hours of the LCD Panel after replacing the panel, press {7 > 0}
EXITING THE SELF CHECK 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.
SELF CHECK SCREEN DISPLAY
CLICK ON THE PICTURES TO MAGNIFY
