Buenos días, tengo una TV Sony LCD que enciende y a los 2 minutos se apaga y parpadea 4 veces, leyendo en la web encontré que es problema con defectos de el LED Driver.4LD_ERRLED driver failure/LED voltage protection
En youtube encontré muchos videos de INDIA, pero no mucho entiendo, hablan de poner una red de divisores de resistencias para que siempre tenga 2.0 voltios y el led panel tenga 12 voltios o 19 voltios... Alguien ha solucionado esa falla? Según algunas pruebas este es el fallo... Adjunto el manual de servicio también, por si a alguien le interesa.
sony_kdl-40nx720_kdl-46nx720_kdl-55nx720_kdl-60nx720_chassis_az2-f.z01[19.00mb]
sony_kdl-40nx720_kdl-46nx720_kdl-55nx720_kdl-60nx720_chassis_az2-f.zip[8.29mb]
Hay unas líneas llamadas LD_ERROR y BKLIGHT_ERROR, para la señal LD_ERROR según el manual de reparación se debe poner a en LOW (aduzco que poco voltaje o a cero voltios o GND negativo chassis tierra) y si para apagar las lámparas el error detectado es OPEN (aduzco que es abierto, sin resistencia o con voltaje)
Si alguien mas tiene alguna falla similar puede consultar esta publicación, ya que al no tener ayuda lo usaré como Bitácora
Aqui está el procedimiento para reseteo:
SONY KDL-40NX720 - KDL-46NX720 - KDL-46NX720 - KDL-55NX720 - KDL-55NX720 - KDL-60NX720
Service mode, Led blinking code, VCOM adjust, sony Led tv Service LED Television Repair and service Contents of this article
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How to enter to service mode
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Led blinking and causes
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Vcom adjustment
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White balance adjustment
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SONY KDL-40NX720 - KDL-46NX720 - KDL-46NX720 - KDL-55NX720 - KDL-55NX720 - KDL-60NX720
HOW TO ENTER SERVICE MODE
1) Turn on the main power switch to place this set in standby mode.
2) Press the buttons on the remote commander as follows, and entering service mode.
DISPLAY > Channel 5 > Volume + > TV POWER
3) Service mode display.
Note: First of all, when you enter Service Mode, you can see “Digital” service mode. Whenever you press “OPTIONS” or “JUMP” on remote, each service mode is changed. “Digital” -> “Chassis” -> “VPC”
CHANGE DATA
Note: “Digital” service mode don’t have to Save. (except “002 MODEL” and “005 CHPRSET” category)
1) Change Data of “Digital” service mode. (except “003 DIG_SRV_MODE” category)
a. Press “2 / 5” on remote to select (up / down) category.
b. Press “1 / 4” on remote to select (up / down) Item.
c. Press “3 / 6” on remote change (up / down) data.
2) Change Data of “Digital” service mode. ( “003 DIG_SRV_MODE” category) “003 DIG_SRV_MODE” is one category of “Digital” service mode.
Please note because this operation is special.
a. Press “2 / 5” on remote to select “003 DIG_SRV_MODE”.
b. Press “1 / 4” on remote to select (up / down) Item.
c. Press “0 / 10” on remote to select item.
d. Press number key “1”~”9” directly. “*” stamp move.
e. Press “12 / enter / select” to decide and advance next step. Press “return”, when returning on the previous page
SAVE CHANGING DATA
1) Write data for “Chassis” or “VPC” service mode
a. Press “Mute” on remote.
It shows green “SERVICE” changes to green “WRITE”.
b. Press “0” or “enter” on remote. Green “WRITE” changes to red “WRITE”. It indicate writing is processing.
c. After a while, red “WRITE” changes to green “SERVICE”. Writing process is done at this point.
2) TV reboot is necessary for applying data change.
WHITE BALANCE ADJUSTMENT
Note: Please execute this adjustment if necessary.
Change Data of “VPC” service mode. (“006 WB” category)
a. Press “1” or “4” on remote to select WB adjustment menu.
b. Change data by pressing “3” or “6”. Each range of these items is 0~255.
c. Press “mute” 䋫”0” on remote to save the data.
“SERVICE” comment is changed to “WRITE”, indicating writing process.
d. After a while, “WRITE” comment returns to “SERVICE”, which means writing process is done.
VCOM ADJUSTMENT
Note: Please execute this adjustment if necessary.
1) Change Data of “VPC” service mode.
a. Select “002 VCOM” category by pressing “2 / 5” on remote.
b. Select “000 ENABLE” item by pressing “1 / 4” on remote.
c. Change ENABLE from “0” to “1” to enable VCOM adjustment.
d. Select “002 VCOM” category by pressing “2 / 5” on remote.
e. Select “001 ADJUST” item by pressing “1 / 4” on remote.
f. Change data by pressing “3 / 6” on remote controller.
g. Finish the adjustment when the picture seems OK.
NOTE:
-Every time the data changed by pressing “3 / 6” Key, the VCOM pattern will display for 5s and in the mean time OSD will disappear, After the 5s period, VCOM pattern will disappear and OSD will display again.
The 5s time can be adjust by data change.
-If pressing the “3/6” key again during the 5s period, the VCOM pattern display time will be extended to another 5s.
SELF DIAGNOSIS
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.
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:
