Saturday, November 21, 2015

SONY KDE-50XS955 LED BLINKING CODE SERVICE MODE AND POWER SUPPLY CIRCUIT

SONY KDE-50XS955

LED BLINKING CODE SERVICE MODE AND POWER SUPPLY CIRCUIT  

SELF DIAGNOSIS FUNCTION
If an error occurs, the STANDBY LED will automatically begin to flash. The number of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY LED flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.
DIAGNOSTIC TEST INDICATORS
When an error occurs, the STANDBY LED will flash a set number of times to indicate the possible cause of the problem.
If there is more than one error, the LED will identify the first of the problem areas. Result for all of the following diagnostic items are displayed on screen. If the screen displays a “0”, no error has occurred
SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to bring up past occurrences of failure for
confirmation on the screen:
To Bring Up Screen Test
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
DISPLAY > Channel > Volume > TV POWER
LED BLINKING CODES 
STBY LED
Flash time

Service menu Item
name
(Screen Display)
Diagnostic Item Description


2
MAIN_POWE
Main Power Over Voltage Protection
3

DC_ALERT
DC_ALERT
AUD_PROT
Audio Abnormal Detection
4
BALANCER
Panel Balancer Error
5


TCON_ERR
Not used
HFR_ERR
HFR Error
P_ID_ERR
Panel ID NVM Error
6
BACKLITE
Back Light Error (Panel Inverter)
7
TMP_ERR
Thermal Error
8

Software Error
9

Not used
10
EMIT_ERR
Emitter Error
11

Reserved for BTV
12


Not used
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen.
After you have completed the repairs, clear the result display to “0”.
Clearing the Self Check Diagnostic List
1. Error history and Error count : Press the Channel 8 => Channel 0 .
2. Panel operation time : Press the Channel 7 => Channel 0 .
Exiting the Self-diagnostic screen
To exit the Self Diagnostic screen, turn off the power to the TV by pressing the POWER button on the remote or the POWER button on the TV
SERVICE MODE 
1. How to Enter Service Mode
1) Turn on the main power switch to place this set in standby mode. (The LED will light red.)
2) Press the buttons on the commander as follows to enter service mode.
(DISPLAY) - (DIGIT 5) - (VOLUME +) - (POWER)
2. Press the JUMP key on the commander three times.
4. After the adjustment is completed, save the data using the MUTE and ENTER keys.

WHITE BALANCE ADJUSTMENT
When the Panel or DE1 Board is replaced or is repaired, W/B should be adjusted.
Measurement equipment
1. Color analyzer (CA-100 manufactured by MINOLTA)
2. Signal generator (ASTRO DESIGN VG-828D)
Measuring procedure
1. Dab the W/B adjustment jig (CA-100) at the glass face of the panel.
2. Connect the Signal generator (VG-828D) to the component
 3. Input All-white signal (70%).
4. Make the settings as follows.
# Set the quality mode to PRO.
# Set the PICTURE to MAX.
5. Set the color temp, be adjusted cool.
6. Adjust the color temperature of the “highlight” side with the following items of service mode menu, fixed a value of one of RGBs 255.
*Operation Register
Service mode “53 FHP_I_1”
36 : RGAIN ×××
37 : GGAIN ×××
38 : BGAIN ×××
Note: Refer to section 2-1-3 for adjustment in service mode.
7. Adjust Cool, Neutral, Warm of each color temperature.
POWER SUPPLY CIRCUIT 

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