Friday, October 09, 2015

SONY KDL-32EX340 - KDL-42EX440 - KDL-42EX441 SERVICE MODE AND LED BLINKING CODE

SONY KDL-32EX340 - KDL-42EX440 - KDL-42EX441 

SERVICE MODE AND LED BLINKING CODE 

OVERALL CIRCUIT DESCRIPTION
MAIN BOARD
Common to all models utilizing the AZ3FK chassis, the Main Board (A Board) contains most of the video processing circuitry along with all audio processing. Control of the television is accomplished via a CPU embedded within the MT5389 processor. Below is a list of the key components located on the Main Board.
TUNER
The tuner is a combination ATSC/NTSC unit. It can receive traditional analog NTSC signals via cable or terrestrial along with ATSC digital signals via terrestrial (8VSB) or cable (64 or 256 QAM).
MT5389 PROCESSOR
This IC performs the majority of the necessary audio and video processing on the Main Board.
Analog Video Input Switch:
All analog video sources are selected and A/D converted and scaled (if necessary) to 1920 X 1080p 60HZ resolution.
Digital Audio and Video Decoder:
 The MPEG2 and Digital Dolby audio streams are received from the tuner for decompression. All video sources which are not native 1920 X 1080p 60HZ are scaled to this resolution. Digital audio content is output to the class D amplifier for processing and amplification.
Audio Processing:
Analog audio sources are selected and A/D converted directly by the MT5389. The audio information is then processed digitally. Digital audio from the tuner and HDMI sources is also input and processed. Class D amplifier provides the drive for the speakers.
HDMI Input and Switching:
The customer can select the HDMI1 and HDMI2 input. Each HDMI input contains a dedicated EDI NVM (not shown) to provide display information data to any device connected via the HDMI inputs.
CPU:
The CPU internal to the MT5389 processor controls all aspects of the television functions. Input from the user along with monitoring of critical circuits is also performed by this CPU.
LVDS Transmitter:
Integrated into the MT5389 is a Low Voltage Differential Signaling (LVDS) transmitter. This circuit converts the 8-bit parallel RGB video information into a set of high speed serial lines for noise-free transmission to the TCON circuits located internally to the LCD Panel.
POWER SUPPLY BOARD
There are 2 different Power Supply Boards used in the models in this manual. The type of board depends on the size of LCD Panel. They are:
# GL9 for the 32” models
# GL10 for the 42” models
There are 3 distinct sections on the power supply:
Standby Supply:
Continuously operational as long as AC power is applied, the standby supply generates 3.3V for the circuits requiring power while the unit is turned off. An unregulated 19V line is present to provide power to the main relay, PFC and main power supply at turn-on.
Main Supply:
Once the power supply receives a power-on command from the CPU on the Main Board, the main switching supply is turned on to provide a regulated 12V source and Audio 12V.
Converter:
Generates the B+ and B- voltages for the LED backlights.
IR BOARD
Designated as the H Board, the IR Board contains the power, standby and timer LED’s that are located on this board along with the IR Remote Receiver and light level sensor.
SWITCH UNIT
This board contains the power, channel and volume up/down, and menu buttons.
LCD PANEL ASSEMBLY
The LCD Panel Assembly includes the LCD Panel, TCON Board and LED Backlight system.
The LCD Panel contains the actual liquid crystals, color filters and polarizers. The liquid crystals are manipulated by the applied voltage to pass a specific amount of light - from the backlit - depending on the level of voltage applied. The TCON performs all the control, timing, charge and discharge functions driving the operation of the LCD Panel. A new LCD Panel Assembly will include the following items:
# LCD Panel
# Bezel Assembly (includes H Board)
# TCON Board
# LED Backlight system
TCON BOARD
The TCON Board communicates between the LCD Panel and the microprocessor on the Main Board. NOTE: The TCON Board is not available as a replacement part for all models. To determine if the TCON Board is available as a replacement part, refer to the LCD Panels Manual.
VIEWING THE SELF CHECK DIAGNOSIS HISTORY
When an error is detected, the Self Check screen records the number of times the error 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.
1. TV must be in Standby mode.
2. Press the following buttons on the Remote Commander within a second of each other:
DISPLAY > Channel 5 > Volume + > POWER
3. To access the Self diagnosis history page, press until Self diagnosis history is highlighted.
4. Then press to view Self Check screen.
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.
6X Blink - Backlight Converter System Failure
If the converter circuits fails to generate high voltage or one or more of the backlight fails to light, the television will shut down and display this diagnostics error.
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.
ACCESSING SERVICE ADJUSTMENT MODE
To access Service Mode, please follow the next instructions:
1. TV must be in Standby mode.
2. Press the following buttons on the Remote Commander within a second of each other:
DISPLAY > Channel 5 > Volume + > POWER
3. The Service Mode initial screen, will be displayed.
4. Do one of the following:
a. Proceed to Completing Service Requirements when Replacing the Main Board.
b. Proceed to Completing Service Requirements when Replacing the LCD Panel.
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.
View the Status Information
Select the Panel ID Code
Add the Serial Number
Add the Model Name
ACCESSING FACTORY ADJUSTMENT MODE
To access, please follow the next instructions:
1. TV must be ON.
2. Press the following buttons on the Remote Commander within a second of each other:
LEFT ARROW > RIGHT ARROW > MUTING > ENTER > MUTING > HOME
NOTE: The instructions to access Factory Mode are NOT THE SAME as the Service Mode procedure.
ADJUSTING THE COLOR TEMPERATURE
The default White Balance data values are set for optimal viewing. The following instructions are for technicians who have been requested to customize calibrations for their customers.
1. Using , scroll down to select Color Temp.
2.Press ENTER to access Color Temp adjustments.
3. Press the LEFT or RIGHT buttons to select the Color Temp type. (Cool, Neutral, Warm1 or Warm2).
4. After the correct Color Temperature is selected, press DOWN to select the temperature type that needs to be modified.
5. After the correct temperature type is selected, press RIGHT to increase the data value or press LEFT to decrease the data value.
6. Complete the data value adjustments to the remaining temperature items within the selected temperature type.
NOTE: Changes to the data value must be saved within the temperature type selected before making changes to one of the other temperature types.
7. To save the changes, press DOWN to select Data Backup.
8. Press RIGHT to select the option: W/B and press ENTER .
9. Do one of the following:
a. To make changes to one of the other temperature types..
b. To exit Factory mode, press HOME