Kdl-40ex701

[abdekader]

Hello
I have problem with my TV KDL-40EX701 (SONY)

it's 2 time led flashing

sometimes doesn't blinks the green led Ok but the Back light not working
and no sound no picture

( I change the system board but the same problem )
I need some help
what's the solution for this problem , I want service manual please .

[budm]

Re: Kdl-40ex701

ex700 may be close:
http://elektrotanya.com/?q=showresul...oria=&kat2=all

[abdekader]

Re: Kdl-40ex701

I want error codes from service manual , that's different

[budm]

Re: Kdl-40ex701

Did you download the manual and look at page 9 for 2-blink error code?
STBY LED Flash time
Service menu Item name(Screen Display) Diagnostic Item Description
2 = MAIN_POWE Main Power Over Voltage Protection

Hello
I have problem with my TV KDL-40EX701 (SONY)

it's 2 time led flashing

sometimes doesn't blinks the green led Ok but the Back light not working
and no sound no picture

( I change the system board but the same problem )
I need some help
what's the solution for this problem , I want service manual please .

[abdekader]

Re: Kdl-40ex701

OK , but this is the same 40EX701 error code ?

and I want Schematic to this Power board if you can
http://www.boardss.co.uk/index.php?m...roducts_id=794

Regards

[budm]

Re: Kdl-40ex701

Well did you look at page 3 of the service manual for the models?
What is the P/N and the version numbers as printed on the power supply board?
Good clear pictures of the board?

[abdekader]

Re: Kdl-40ex701

the same thanks

if you have schematic to this power , I want it

do you know what's the problem in this power

[budm]

Re: Kdl-40ex701

See if your TV is the same as shown in this Training manual

[budm]

Re: Kdl-40ex701

the same thanks

if you have schematic to this power , I want it

do you know what's the problem in this power

Please show me the pictures and give me the P/N as printed the board.

[budm]

Re: Kdl-40ex701

Is this the exact power supply board?
http://www.shopjimmy.com/catalogsear...NY+KDL-40EX700

[abdekader]

Re: Kdl-40ex701

NO this different

the first manual good

but now I want schematic to power board (1-881-956-12) for repair it

if you know in power board what's the problem tell me

(3.3v ok) (AC_det =3.3 OK) 5v OK but no 12v

[abdekader]

Re: Kdl-40ex701




the power board

what's the common problems in this board ?

[budm]

Re: Kdl-40ex701

I do not have any info on this power supply board.
I found this training manual.

Protection ShutdownCritical voltages and circuit operations are monitored by the CPU on the BAL board. If a fault is detected the unit will be forced to shut down by the CPU. The monitored circuit in which the fault occurred will cause the CPU to flash the standby LED in groups of repeating sequences. The number of blinks in these groups identifies which voltage or circuit caused the protection event.Not all of the available protect codes are used. Models that are LED backlit do not use the 4-blink balancer error as this circuit is found in models that are backlit with fluorescent lamps. The following list contains the protect circuits and diagnostics codes used in the EX700 models. The troubleshooting flowchart in Figure 3-5 provides guidance in locating the possible component causing the shutdown.

2X: A loss of REG12V from the power supply triggers this protect event. The causes range from a failure of the REG12V line, power supply failure, power supply shutdown, an open string of LED backlights, or a problem with the detection circuit on the BAL board.If a failure occurs on the power supply board that causes a loss of the REG12V line, the standby LED will not light when power is applied to the television. After about 10 seconds, the standby LED will light briefly and begin blinking in groups of 2.If one of the series strings of LED backlights opens, an over-voltage protect circuit for the LED drive lines turns off the main relay. This causes the same 2-blink error code as a loss of REG12V. The difference to observe is the presence of the red standby LED when AC power is applied. The green power LED lights for approximately 10 seconds when the power is turned on followed by a shutdown of the unit with a 2-blink error flashing on the standby LED.

3X: The REG 5V and D3.3V source originating on the BAL board is monitored for low-voltage conditions by CPU IC5000. A failure causing a 3X shutdown would require replacement of the BAL board.

5X: A communications error with the high frame-rate or timing control circuits has occurred. Since both of these circuits are located on the TCON board, replacement of the board should remedy the problem. In rare cases a loose or defective LVDS cable could be the cause. If the TCON board is not available as a separate part, the entire LCD panel must be replaced.

6X: Although labeled as “backlight error”, this condition is caused by a failure of the converter circuit generating the voltage and PWM signals to control the backlight LED's. Replacement of the power supply board is necessary.

7X: A digital thermometer IC located on the BAL board provides a temperature reading of the chassis and LCD panel. If the temperature exceeds a pre-determined point the unit will shut down. If this problem occurs immediately at turn-on, the temperature sensing IC has failed and replacement of the BAL board is required. If this occurs after the unit has been running for a while, check for ventilation issues that could cause the unit to run hotter than normal.