Friday, August 28, 2015

SONY KDL 32BX320- KDL 32BX321- KDL 32BX420- KDL 32BX421 SERVICE MODE LED BLINKING AND DISASSEMBLING

SONY KDL 32BX320- KDL 32BX321- KDL 32BX420- KDL 32BX421 

SERVICE MODE LED BLINKING AND DISASSEMBLING

STANDBY LED FLASH COUNT
2X Blink - Main Power Error
A loss of REG12V from the power supply triggers this protect event. This symptom is usually remedied by replacing the power supply board. If the error continues after the power supply board is replaced, suspect excessive loading which is causing the power supply to shut down. This is usually caused by a failure of the inverter circuits. Unplug the inverter and turn the TV back on. If a 6X error is displayed, the inverter (or LCD panel) must be replaced.
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 would require replacing the main board.
5X Blink - TCON Error
A communications error with the timing control circuits (TCON) has occurred. If the TCON is available for replacement, replace the TCON. If the TCON is not available, the LCD panel must be replaced since the TCON circuit is part of the LCD panel assembly. In rare cases a loose or defective LVDS cable could also be the cause.
6X Blink - Backlight 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 is necessary. If the backlights never turn on before the 6X shutdown, the inverter has]failed. If the inverter is available for replacement, replace the inverter. If the inverter is not available, replace the LCD Panel.
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.
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.
1. 1. TV must be in standby mode. (Power off).
2. Press the following buttons on the Remote Commander within a second of each other:
DISPLAY > Channel 5 > Volume - > POWER ON
LEARING THE SELF CHECK DIAGNOSTIC LIST
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic history after you have completed the repairs to be sure you have cleared the result display to “0”.
1. To clear the Error history and Error count: Press the Channel 8 > Channel 0 . To clear the Panel operation time: Press the Channel 7 > Channel 0
EXITING THE SELF CHECK DIAGNOSTIC SCREEN
1. To exit the Self Diagnostic Self Check screen, turn off the power to the TV by pressing the POWER button on the remote or the POWER button on the TV.
ACCESSING SERVICE ADJUSTMENT MODE
This set does not use Service Mode for adjustments. To make adjustments.
However, you can access the Self diagnosis history page from Service Mode.
1. 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
3. To access the Self Diagnosis history page, press DOWN ARROW until Self diagnosis history is highlighted, and then press ENTER.
4. To exit service mode, turn the power off.
ACCESSING FACTORY ADJUSTMENT MODE
For these models, adjusment data is changed in Factory Mode.
1. TV must be ON.
2. Press the following buttons on the Remote Commander within a second of each other:
ADJUSTING THE COLOR TEMPERATURE
1.Using the DOWN button, 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 the DOWN to select the Temperature type that needs to be modified.
5. After the correct Temperature type is selected, press the 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 the to select Data Backup, then press ENTER .
Do one of the following:
a. To make changes to one of the other Temperature types, repeat steps 5 through 9.
b. To exit Factory mode, press POWER
 LEFT ARROW > RIGHT ARROW > MUTING > ENTER > MUTING > HOME

REAR COVER AND SPEAKERS REMOVAL
A. Remove 9 screws from Rear Cover
B. Remove 1 screw from Side Bracket position
C. Remove 1 screw from Terminal Area position
D. Remove 2 screws from Rear Cover
E. Gently lift up Rear Cover from bottom side to detach from Bezel
F. Lift up AC Power Cord and disconnect 1 connector from G13 Board to detach from Under Cover
G. Remove 1 screw from Under Cover
H. Remove 1 screw from Left Speaker Bracket to detach from Bezel
I. Remove 2 screws from Speaker to detach from Left Speaker Bracket
J. Release clips and disconnect 1 connector to detach H Board from LED Guide
K. Remove 1 screw from Right Speaker Brackets to detach from Bezel
L. Remove 2 screws from Speaker to detach from Right Speaker Bracket
M. Lift up Switch Unit and disconnect 1 connector to detach from Bezel
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