Sharp LC-40LE810UN question

[tibimakai]

Re: Sharp LC-40LE810UN question

Thank you for helping me.
It's to late now, I will measure it tomorrow.
I was wondering about this startup on LED TVs, they don't have the 2 sec to black. as LCD TVs with CCFl tubes?

[olegi]

Re: Sharp LC-40LE810UN question

This power should have 2 pair of LEDs divided in 2 section total 4 wires .Can you check with voltmeter what you have on connector LED_DRV1+ and - as well LED_DRV2 + and -.You have to attach voltmeter before you power the tv,then power up and see what is the reading from each pin. Post results.

[tibimakai]

Re: Sharp LC-40LE810UN question

I have never repaired an LED TV which required work on the backlight. How do I know which one is bad?

[olegi]

Re: Sharp LC-40LE810UN question

I don't have backlight. I have purchased a power suppliy from partstore.com and it showed the same error code with it. I have to check on the capacitor, I haven't noticed it.

Your backlight is made from LEDs. In this case check for open LEDs on backlight.Do not buy new eeprom for now(you have to remove the error )

[olegi]

Re: Sharp LC-40LE810UN question

We went over that - it's a surge protection device, not a problem or the fuse would blow.

Interesting if an LED in the backlight is dead. Should be easy enough to replace it or disable it (barely noticeable) - but it seems to be a common fault, seen a few sets like that here with dodgy backlight connections or open LEDs.

Just want to get my hands on one .

I use the same picture from post 1 and i was refering for second circle bottom .You are right ,it is like open LEDs(backlight)

[tom66]

Re: Sharp LC-40LE810UN question

We went over that - it's a surge protection device, not a problem or the fuse would blow.

Interesting if an LED in the backlight is dead. Should be easy enough to replace it or disable it (barely noticeable) - but it seems to be a common fault, seen a few sets like that here with dodgy backlight connections or open LEDs.

Just want to get my hands on one .

[tibimakai]

Re: Sharp LC-40LE810UN question

I don't have backlight. I have purchased a power suppliy from partstore.com and it showed the same error code with it. I have to check on the capacitor, I haven't noticed it.

[olegi]

Re: Sharp LC-40LE810UN question

Basically this error means (with cleared , removed eeprom)if you are sure that your power supply board is OK ,you have burn led diode in backlight.I check from your post #1 ,there is burnt capacitor in red circle.Can you confirm?

[tibimakai]

Re: Sharp LC-40LE810UN question

I think that the easiest for me it would be to just purchase a new one. The question is which one, on Digikey there are a lot of choices.

[olegi]

Re: Sharp LC-40LE810UN question

Ok don't put it back .Check this .According to service manual:
Power PWB failure Flashes 2 times (twice slow) after that
Flashes 1 times Power supply error 1 (*2) AC_DET error
Flashes 2 times Power supply error 2 (*2) UR+13V error
Flashes 3 times Power supply error 3 (*2) D3.3V error
Flashes 5 times Panel power supply error

PANEL_POW Panel 12V failure Flashes fast 5 times
DET_PNL12V(35pin) failure (L). Panel power is not applied.
Detection is started after turning on the panel power and
receiving command; the power is turned off by polling.

[tibimakai]

Re: Sharp LC-40LE810UN question

Ok, I have removed it and it's the same code.

[olegi]

Re: Sharp LC-40LE810UN question

Don't do shorting pins .Can you desolder that chip .Power up with removed eeprom chip.Tell what is the blinking code.What i think after a few unsuccess power ups (errors ) , firmware write code in this chip to prevent from further power on(may be for safety )

[tibimakai]

Re: Sharp LC-40LE810UN question

Thank you.
So, there is an error stored on the EEPROM and that error doesn't let the TV to turn on?
Why that error came up in the first place, what caused it?
I see on the net that these chips can be cleared with a paper clip, what is your thoughts about that? Between pin 3 and 6.

[olegi]

Re: Sharp LC-40LE810UN question

Hi tibimakai, i check today and that chip is IC2004 and is it 24c02 not 24c04.You can find it on the back on the board in red circle .That was in my tv before i erased.Hope this helps.

[tibimakai]

Re: Sharp LC-40LE810UN question

I understand, but I'm having a hard time figuring out which one is that eeprom chip.

[tom66]

Re: Sharp LC-40LE810UN question

^Reply to budm on why there's no reset button not relevant to your problem.

[tibimakai]

Re: Sharp LC-40LE810UN question

Which one is that chip?

[tom66]

Re: Sharp LC-40LE810UN question

Darn, they have to make it so complicated. Why can't they put a simple clear button to clear out the garbage from the chip, but then they cannot sell more TV, I guess.

Because then you need a microcontroller or some processor to erase the chip - which adds expense - and TVs are really slim margin so where-ever cost can be cut...

[tibimakai]

Re: Sharp LC-40LE810UN question

I don't understand which IC I have to replace. No matter which one, it.doesn't look easy at all.

[olegi]

Re: Sharp LC-40LE810UN question

Consider your tv it is like computer.