SONY KDL-32BX355 -40BX455 - KDL-46BX455
SERVICE MODE AND LED BLINKING
AZ3TK Chassis
SELF DIAGNOSIS
FUNCTION
Critical voltages and circuit operations are monitored by the CPU on the Main Board. If an error is detected the Self Diagnosis function in the TV will force the TV to shut down by the CPU. The monitored circuit in which the fault occurred will automatically cause the CPU to blink the Standby LED in groups of repeating sequences. The number of times the Standby LED blinks indicates the possible cause of the problem. Not all of the available protect codes are used in every model. For example, models that don’t have the local dimming feature do not use the 4X blink error as this circuit is found in models that are backlit with fluorescent lamps. The information in this section provides guidance in locating the possible component causing the shutdown.
Critical voltages and circuit operations are monitored by the CPU on the Main Board. If an error is detected the Self Diagnosis function in the TV will force the TV to shut down by the CPU. The monitored circuit in which the fault occurred will automatically cause the CPU to blink the Standby LED in groups of repeating sequences. The number of times the Standby LED blinks indicates the possible cause of the problem. Not all of the available protect codes are used in every model. For example, models that don’t have the local dimming feature do not use the 4X blink error as this circuit is found in models that are backlit with fluorescent lamps. The information in this section provides guidance in locating the possible component causing the shutdown.
VIEWING THE SELF CHECK DIAGNOSIS HISTORY
When an error is detected, the Self Check screen records the error that occurred. This is helpful in confirming past occurrences of an error, and for determining if an error is intermittent when the customer is not sure what is causing the television to shut down. If the screen displays a “0”, no error has occurred. You must got into Service Mode to access the Self Check menu.
1. TV must be in Standby mode. (Power On).
2. Press the following buttons on the Remote Commander within a second of each other:
When an error is detected, the Self Check screen records the error that occurred. This is helpful in confirming past occurrences of an error, and for determining if an error is intermittent when the customer is not sure what is causing the television to shut down. If the screen displays a “0”, no error has occurred. You must got into Service Mode to access the Self Check menu.
1. TV must be in Standby mode. (Power On).
2. Press the following buttons on the Remote Commander within a second of each other:
LEFT
ARROW > RIGHT ARROW > MUTE > ENTER
>MUTE > VOLUME +
3. To access the Self diagnosis history page, press
DOWN ARROW until Self diagnosis history
is highlighted, and then press ENTER.
4. Review the information to determine the most likely
source of the error.
5. To exit the Self Check, press MENU
5. To exit the Self Check, press MENU
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
The 4X error code is only used on models incorporating local dimming LED backlighting. If a failure occurs on the LD board or one of the LED’s fails in the panel the TV will shut down and display this diagnostic code. Models using conventional non-local dimming LED backlighting do not utilize this error code.
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 - Backlight Converter System Failure
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 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 backlights never turn on before the 6X shutdown, the Inverter MT Board has failed. If this board is available for replacement, replace it, if not, replace the LCD Panel Assembly.
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
The 4X error code is only used on models incorporating local dimming LED backlighting. If a failure occurs on the LD board or one of the LED’s fails in the panel the TV will shut down and display this diagnostic code. Models using conventional non-local dimming LED backlighting do not utilize this error code.
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 - Backlight Converter System Failure
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 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 backlights never turn on before the 6X shutdown, 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.
SERVICE
MODE
ACCESSING SERVICE
ADJUSTMENT MODE
Use the following information after replacing the Main Board or the LCD Panel to ensure all features of the TV are available.
1. TV must be in Standby mode. (Power On).
2. Press the following buttons on the Remote Commander within a second of each other:
Use the following information after replacing the Main Board or the LCD Panel to ensure all features of the TV are available.
1. TV must be in Standby mode. (Power On).
2. Press the following buttons on the Remote Commander within a second of each other:
LEFT
ARROW > RIGHT ARROW > MUTE > ENTER
>MUTE > VOLUME +
COMPLETING SERVICE
REQUIREMENTS WHEN REPLACING THE MAIN BOARD
The following must be performed after replacing the Main Board to ensure that all of the features for the TV will be available.
# Viewing the Status Information
# Adding the Serial Number
# Selecting the Model Name
The following must be performed after replacing the Main Board to ensure that all of the features for the TV will be available.
# Viewing the Status Information
# Adding the Serial Number
# Selecting the Model Name
VIEWING THE STATUS INFORMATION
After replacing the Main Board, LCD Panel, or TCON Board, you MUST UPDATE the SOFTWARE to the latest version. Verify the latest software is installed before proceeding to the service adjustments.
3. Press DOWN ARROW until Status Information is selected, then press ENTER.
After replacing the Main Board, LCD Panel, or TCON Board, you MUST UPDATE the SOFTWARE to the latest version. Verify the latest software is installed before proceeding to the service adjustments.
3. Press DOWN ARROW until Status Information is selected, then press ENTER.
4. Verify the latest software version is installed.
5. Do one of the following:
a. If the latest software is installed, proceed to Adding the Serial
Number.
b. If the latest software is not installed, update the software and then proceed to Adding the Serial Number.
5. Do one of the following:
a. If the latest software is installed, proceed to Adding the Serial
Number.
b. If the latest software is not installed, update the software and then proceed to Adding the Serial Number.
ADDING THE SERIAL NUMBER
Verify before proceeding to the next step:
Verified Status Information
1. TV must be in Standby mode. (Power On).
Verify before proceeding to the next step:
Verified Status Information
1. TV must be in Standby mode. (Power On).
2. Press the following buttons on the Remote Commander
within a second of each other:
LEFT
ARROW > RIGHT ARROW > MUTE > ENTER
>MUTE > VOLUME +
3. Press DOWN ARROW until Serial Number Edit is
selected, and then press ENTER .
4. Locate the serial number for the TV on the side of the
Rear Cover of the TV.
5. Using the Remote Commander, enter the correct serial
number.
6. Proceed to Selecting the Model Name.
6. Proceed to Selecting the Model Name.
SELECTING THE MODEL NAME
Verify before proceeding to the next step:
#Verified Status Information
#Added the Serial Number
7. From the Service Mode menu, press DOWN ARROW until Model Name Edit is selected, and then press ENTER.
Verify before proceeding to the next step:
#Verified Status Information
#Added the Serial Number
7. From the Service Mode menu, press DOWN ARROW until Model Name Edit is selected, and then press ENTER.
8. Using the Remote Commander, enter the correct Model Name.
9. To save the change, press ENTER .
10. To exit the Self Check, press MENU .
9. To save the change, press ENTER .
10. To exit the Self Check, press MENU .
CHANGING THE LVDS SPECTRUM
Verify before proceeding to the next step:
# Verified Status Information
Verify before proceeding to the next step:
# Verified Status Information
6. Press DOWN ARROW until LVDS Spectrum (%) is
selected.
7. Press RIGHT or LEFT ARROW to change the data value.
8. Proceed to Selecting the LCD Panel.
8. Proceed to Selecting the LCD Panel.
SELECTING THE LCD PANEL
Verify before proceeding to the next step:
#Verified Status Information
#Changed the LVDS Spectrum
9. Press DOWN ARROW until Panel Selection is selected.
Verify before proceeding to the next step:
#Verified Status Information
#Changed the LVDS Spectrum
9. Press DOWN ARROW until Panel Selection is selected.
10. Press RIGHT or LEFT ARROW to
select the correct panel for the model being repaired.
11. To save the changes, press UP ARROW until the Back is selected, then press ENTER .
11. To save the changes, press UP ARROW until the Back is selected, then press ENTER .
