Sony KDL EX*** series LCD TVs LED blinking codes details – back cover disassembly – firmware update – self diagnostic mode
Applicable to - Sony KDL-22EX355 Sony KDL32EX355 Sony KDL32EX356 Sony KDL40EX455 and Sony KDL40EX456
How to remove the back cover - Softare upgrade - LED blinking codes details - Service mode
2X Blink - Main Power Error
A loss of REG12V from the power supply triggers this protect event. The usual cause is a failure of the main switching supply. In some instances, excessive loading on the secondary supply lines can cause the switching regulator to stop, or fail again, if a replacement board is installed.
3X Blink- DC Regulator/Audio Error
The REG 5V and D3.3V source originating on the Main Board is monitored for low-voltage conditions by the CPU. A failure causing a 3X shutdown requires replacing the Main Board.
4X Blink – Balancer Error
NOT USED IN THIS MODEL SERIES
5X Blink - TCON Error/Panel Error
The 5X blink protection mode indicates a communications error with the timing control circuits (TCON Board) has occurred. If the TCON Board is available for replacement, replace it, if not, replace the LCD Panel Assembly. In rare cases a loose or defective LVDS cable could also be the cause.
A loss of REG12V from the power supply triggers this protect event. The usual cause is a failure of the main switching supply. In some instances, excessive loading on the secondary supply lines can cause the switching regulator to stop, or fail again, if a replacement board is installed.
3X Blink- DC Regulator/Audio Error
The REG 5V and D3.3V source originating on the Main Board is monitored for low-voltage conditions by the CPU. A failure causing a 3X shutdown requires replacing the Main Board.
4X Blink – Balancer Error
NOT USED IN THIS MODEL SERIES
5X Blink - TCON Error/Panel Error
The 5X blink protection mode indicates a communications error with the timing control circuits (TCON Board) has occurred. If the TCON Board is available for replacement, replace it, if not, replace the LCD Panel Assembly. In rare cases a loose or defective LVDS cable could also be the cause.
6X Blink - Back-light Converter System
Failure
If the inverter circuits fails to generate high voltage or one or more of the back-light lamps fails to light, the television will shut down and display this diagnostics error. Observing for the presence of back-lighting is crucial in determining which component is likely at fault. If the back-lights turn on before the 6X shut-down occurs, it is safe to assume that the inverter circuits are functioning and one of the lamps failed to ignite. Replacing the LCD Panel assembly is necessary. If the back-lights never turn on before the 6X shut-down, the Inverter MT Board has failed. If this board is available for replacement, replace it, if not, replace the LCD Panel Assembly.
If the inverter circuits fails to generate high voltage or one or more of the back-light lamps fails to light, the television will shut down and display this diagnostics error. Observing for the presence of back-lighting is crucial in determining which component is likely at fault. If the back-lights turn on before the 6X shut-down occurs, it is safe to assume that the inverter circuits are functioning and one of the lamps failed to ignite. Replacing the LCD Panel assembly is necessary. If the back-lights never turn on before the 6X shut-down, the Inverter MT Board has failed. If this board is available for replacement, replace it, if not, replace the LCD Panel Assembly.
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 predetermined 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.
A digital thermometer IC located on the Main Board provides a temperature reading of the chassis and LCD panel. If the temperature exceeds a predetermined 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.
DISASSEMBLY
> Gently place the LCD TV face down onto a soft cloth and remove 3 screws from the bottom of Table-Top Stand.
> To avoid damaging the AC Power Supply Cord, remove the screw from the AC Cover and disconnect the AC Power Cord.
> Remove the remaining screws from the Rear Cover
> Gently hold down the Rear Cover from the centre, and then carefully lift the Rear Cover from the bottom.
How to clean the LCD panel
CAUTION: When cleaning the TV, be sure to unplug the power cord
to avoid any chance of electric shock.
Clean the cabinet of the TV with a dry soft cloth, and wipe the LCD screen gently with a soft cloth.
Stubborn stains may be removed with a cloth slightly moistened with a solution of mild soap and warm water.
If using a chemically pretreated cloth, please follow the instruction provided on the package.
Never use strong solvents such as a thinner, alcohol or benzine for cleaning.
Periodic vacuum of the ventilation openings is recommended to ensure proper ventilation.
Do Not use paper towels, any type of abrasive pad, rags, rubber or vinyl materials to clean the screen. Using these materials could easily scratch the screen which may result in permanent damage.
Do Not use any cleaning product containing alkaline/acid cleaner, scouring powder, or volatile solvent, such as
alcohol, ammonia, benzine, thinner or insecticide. Using any of these harsh cleaners may result in permanent damage to the screen.
Do Not spray water or detergent directly onto the TV screen . If liquid drips into the bottom of the screen it may cause a failure.
Clean the cabinet of the TV with a dry soft cloth, and wipe the LCD screen gently with a soft cloth.
Stubborn stains may be removed with a cloth slightly moistened with a solution of mild soap and warm water.
If using a chemically pretreated cloth, please follow the instruction provided on the package.
Never use strong solvents such as a thinner, alcohol or benzine for cleaning.
Periodic vacuum of the ventilation openings is recommended to ensure proper ventilation.
Do Not use paper towels, any type of abrasive pad, rags, rubber or vinyl materials to clean the screen. Using these materials could easily scratch the screen which may result in permanent damage.
Do Not use any cleaning product containing alkaline/acid cleaner, scouring powder, or volatile solvent, such as
alcohol, ammonia, benzine, thinner or insecticide. Using any of these harsh cleaners may result in permanent damage to the screen.
Do Not spray water or detergent directly onto the TV screen . If liquid drips into the bottom of the screen it may cause a failure.
SOFTWARE UPDATE RESPONSIBILITY
Software updates are designed to be performed by the customer. Warranty repairs in which the issue can be resolved by a software update are not reimbursable. Most issues involving software updates are handled by the customer service centre and should not be directed to an authorized service centre. It is the responsibility of the servicer to prevent service calls for issues that involve software updates. Exceptions to this are certain cases whereby the customer is unable or unwilling to perform the task. In this situation, the service will be notified and receive the proper authorization for reimbursement. It is the servicer’s responsibility, however, to make certain that any TV requiring a legitimate service is running the latest software version and to install it if necessary.
Software updates are designed to be performed by the customer. Warranty repairs in which the issue can be resolved by a software update are not reimbursable. Most issues involving software updates are handled by the customer service centre and should not be directed to an authorized service centre. It is the responsibility of the servicer to prevent service calls for issues that involve software updates. Exceptions to this are certain cases whereby the customer is unable or unwilling to perform the task. In this situation, the service will be notified and receive the proper authorization for reimbursement. It is the servicer’s responsibility, however, to make certain that any TV requiring a legitimate service is running the latest software version and to install it if necessary.
CHECKING THE SOFTWARE VERSION
The easiest way to check the version of software that is currently on the TV is to access the Contact Sony screen by using the customer menu.
The easiest way to check the version of software that is currently on the TV is to access the Contact Sony screen by using the customer menu.
SOFTWARE CORRECTABLE SYMPTOMS
Most
symptoms that are correctable by software updates involve
communications issues with other devices or minor glitches in the
operation of a specific function. Below is a list of some of the
symptoms that may be corrected with a software update:
● Fluctuations in picture brightness
● Intermittent picture freezing or noise
● Problems with certain inputs (especially HDMI)
● Intermittent or distorted audio
● Erratic remote control operation
● Unit turns on and off by itself
● Loss of colour
● Internet connectivity
● Certain features not working correctly (photo or video file viewing)
ACCESSING SERVICE ADJUSTMENT MODE
TV must be in Standby mode. (Power On).
2. Press the following buttons on the Remote Commander within a second of each other.
DISPLAY => Channel 5 => Volume + => POWER
To access the Self diagnosis history page, press ▼until Self diagnosis history is highlighted, and then press (+)
To exit service mode, turn the POWER off
SELECTING THE PANEL ID CODE
After
replacing the Main Board or the LCD Panel, you must update the software
to the latest version and then select the Panel ID from Factory Mode.
1. TV must be in Standby mode. (Power On).
Enter the service mode.
Press ▼ to select Panel Selection.
