SONY KDL32BX355 _ NUEVO_ TROUBLESHOOTING_ STANDBY LED BLINKING CODES

UPDATING SOFTWARE

The Self Diagnosis function is designed to provide information regarding the problem with the TV, however, there are several issues that may be resolved by updating the TV software to the latest version. Always check for any issues that are software related. 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

TV turns on and off by itself

Loss of color

Internet connectivity

Certain features not working correctly (photo or video file viewing).

SELF DIAGNOSIS FUNCTION

The CPU on the Main Board monitors critical voltages and circuit operations. 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 back-lit with fluorescent lamps. The information in this section provides guidance in locating the possible component causing the shutdown.

VIEWING 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.

TV must be in Standby mode. (Power On).   Press the following buttons on the Remote Commander within a second of each other:

• {<-- / --> / MUTING / [ + ] / MUTING / VOLUME [+] }  Remote control number to this set is [RM-YD081].
• To access the Self diagnosis history page, press until Self diagnosis history is highlighted, and then press
  Review the information to determine the most likely source of the error.
  To exit the Self Check, press MENU .

STANDBY LED BLINKING CODES.

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.

NOT USED IN THIS MODEL SERIES

4X Blink – Balancer Error

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 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.