Sharp LC-40LE810UN question

[budm]

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.

[olegi]

Re: Sharp LC-40LE810UN question

In this particular board you have tree eproms .First with firmware is on top side on the board (left side on heat sink on post 129 ic3401 if i see correct from picture) Second for settings (channels , brightness ...) it is 64kbit .
Third is it 4kbit .That chip you have to erase.For programmer go to google and search for ( 24c04 programmer )

[tibimakai]

Re: Sharp LC-40LE810UN question

I don't have a programmer.

[budm]

Re: Sharp LC-40LE810UN question

Does this chip also store firmware? I am trying to understand how it works if it is blank.

[olegi]

Re: Sharp LC-40LE810UN question

You have to desolder this chip,erase it with eprom programmer and soldered back.You can use brand new chip too.

[tibimakai]

Re: Sharp LC-40LE810UN question

How you do that, since the Tv doesn't turn on?

[olegi]

Re: Sharp LC-40LE810UN question

On your main board there is eprom (chip finish with 04) on the backside of the board You have to erase it (blank it).Inside this chip is store a lot errors . you can find this chip on picture on post 129 on the bottom .I had 52 " sharp same blinking code .After erase this
chip ,tv is working again .Don't forget to hit factory settings. Hope this helps
Post your results.

[tibimakai]

Re: Sharp LC-40LE810UN question

2 slow and 5 fast.

[olegi]

Re: Sharp LC-40LE810UN question

Hi tibimakai. Do you still have this blinking code in front of tv, if it is yes what is the sequence.

[tibimakai]

Re: Sharp LC-40LE810UN question

With the original board back in the TV, I have measured the voltages before the feedback kicks in.
This is what I'm getting:
Pin#--Designation---Volts
1-----13.2V-------= 13.02V
2-----13.2V-------= 13.03V
3-----SGND-------= 0
4-----SGND-------= 0
5-----SGND-------= 0
6-----SGND-------= 0
7-----SGND-------= 0
8-----SGND-------= 0
9-----AC-DET-----= 3.12V
10----PS-ON------= 3.03V
11----BU5V-------= 5.017V
12----PNL-POW---= 0.12V
So, the mainboard it's OK too?
When I turn on the TV there is a very-very tiny buzz.
Can I measure the LED transformer outputs? They should be like 90V or more?

[tibimakai]

Re: Sharp LC-40LE810UN question

I got frustrated because sometimes I had voltages and sometimes were all gone.
Hopefully they will take it back.

[tom66]

Re: Sharp LC-40LE810UN question

You are not getting PSON so why did you replace the power supply? Sorry - missed this thread.

[tibimakai]

Re: Sharp LC-40LE810UN question

What should I do next? I don't see conventional VDOs on the mainboard to check.
Since the replacement power supply acts the same way as the original board, I assume that it's not the power source is the problem.
I don't understand why there is no voltage at the connector(only 4.7V stby).
Special order mainboard at partstore is $155.

[tibimakai]

Re: Sharp LC-40LE810UN question

Power supply/Inverter board arrived. I have installed it and it's exactly as with the original board. Still blinking a code. Board ordered from partstore.com.
So, it looks like it's the mainboard is the problem. Not receiving any voltages other then the STBY voltage.

[tibimakai]

Re: Sharp LC-40LE810UN question

I will let you know. I'm using a WDTV Live streaming player now. It's hard to believe that it could be better then that.

[tom66]

Re: Sharp LC-40LE810UN question

Probably the component responsible for providing panel power is dead. The corrosion could have killed it.

You will have to let us know how smart the smart TV seems! I have always found them annoyingly slow.

[tibimakai]

Re: Sharp LC-40LE810UN question

I have just noticed that actually the LEDs are on an blinking while I have the voltages. I haven't notice them before, since they were up side down.
The code that flashes is 2 slow and 5 fast blinks which in the manual says that it's:
-Power PWB failure (Power failure, etc.); 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.
It would be nice if we could fix this board also. I would have a good board.
The new one from partstore is in it's way.

[tibimakai]

Re: Sharp LC-40LE810UN question

..and it's a smart TV too!
Today before I left to work, I have checked it again and the voltages were there at the two capacitors.
It seems that all the voltages have to drain out of the TV before I have the voltages back.
I may have some short in the secondary side of the PS?
The FET and that double diode(not sure how is called, looks like a FET) under the black heatsink has voltages at there pins.
Not sure what happens between these and the connector.
Man I don't like to give up, and I hate myself that I have purchased that board.

[tom66]

Re: Sharp LC-40LE810UN question

I never trust people when I pick up a TV .

I didn't realise you were having so much difficulty with the PSU. I hope the replacement works.

I want a nice Sharp 40" LED set to work on soon .

[tibimakai]

Re: Sharp LC-40LE810UN question

I was trying to fix this power supply for over a month with no success.
I have waited for two ICs(same) and when I install one it runs for a bit and then it quits, replaced the second one and the same thing happened.
Now I will have to order two more($15 shipped=total $30), wait another three weeks.....
Last couple of days I didn't get any real help, plus the frustration and I have just pulled the trigger. It wasn't easy to give up.
It was less then $78 shipped.
The back cover of the TV is Aluminum(!) and that one too has some white spots, not sure if it's water or oxidation of the Aluminum exposed to the elements
The guy from whom I picked it up he said that it was his own TV, but then he has a company which installs TVs on the wall.
I'm guessing that he lied and this TV it was installed at an outdoor place most likely.