Sharp aquos LC-40LE810E

[meme123]

Re: Sharp aquos LC-40LE810E

I changed the resistor to 570 ohms and also resist 68k as you said in the race I had the same TV and holidays and you as you said and succeeded television, but this television did not respond help

[Jstone86]

Re: Sharp aquos LC-40LE810E

I have same model with same flash beep 2-2 error problem.after going through all the comments on this thread can someone please confirm if all i have to do to solve this problem is to just solder 68K resistor on top of R7019??should i forgone plugging resistor next to pin 11 and other end of resistor to pin 9???

[rievax_60]

Re: Sharp aquos LC-40LE810E

Yes, solder a 68K on top of R7019 or replace R7019 with a 33K or something a bit lower. The value is not critical. This mod increases LED current to compensate for the loss of the opto's CTR due to aging.
I don't recommend jumpering pins 9 and 11.

[Jstone86]

Re: Sharp aquos LC-40LE810E

Thanks I will try and give you feedback

[Jstone86]

Re: Sharp aquos LC-40LE810E

I couldn't get 68k or 33k SMD resistor to buy from my local electronics shop so I bought 68k and 33k carbon film resistor so I hope it will work. The two pins of carbon film resistor is it interchangeable or reversal so that I can solder on top of r7019 on any of the two pin?

[Jstone86]

Re: Sharp aquos LC-40LE810E

I replaced r7019 with 33k carbon film resistor and it didn't work basically same 2-2 LED blink light. I Mayb I should wait and order smd 33k resistor from aliexpress

[rievax_60]

Re: Sharp aquos LC-40LE810E

Measure some pin voltages on the PD connector as the TV is being turned on.
Look at post 21 as an example.
I mainly want to know what happens at pins 1 and 9.

[Jstone86]

Re: Sharp aquos LC-40LE810E

OK bro I will try it and let u know tomorrow cuz it's late here

[Jstone86]

Re: Sharp aquos LC-40LE810E

mr rievax 60,
this is the volts i get after i replace R7019 with a 33K cabon film resistor.

PIN 1 - 12.9V UR13.2V (SIGNAL)
PIN 2 - 12,9V UR13.2V (SIGNAL)
PIN 3 - 12,9V S13.2V (AUDIO)
PIN 4 - 12,9V S13.2V (AUDIO)
PIN 5 - 12.9V SGND (AUDIO)
PIN 6 - 0V SGND (AUDIO)
PIN 7 - 0V SGND (SIGNAL)
PIN 8 - 0V SGND (SIGNAL)
PIN 9 - 3.10V AC-DET:
PIN 10 - 3.03V PS-ON
PIN 11 - 4,9V BU5V
PIN 12 - 3.25v PNL-POW

[Jstone86]

Re: Sharp aquos LC-40LE810E

I also measured the pf Voltage of PC7703 with these reults which immediately drops to zero like after 7 secs or so
PIN 3= 4.74v
PIN 4= 4.90V

[rievax_60]

Re: Sharp aquos LC-40LE810E

Those voltage readings show that the AC-DET is working properly.
There must be something else wrong, Does the voltage on pin 1 disappear after 7 seconds also?

[budm]

Re: Sharp aquos LC-40LE810E

Since you do have 3.25V PNL-POW control signal, so do you get 12V at the PNL-12V connector pin?

[Jstone86]

Re: Sharp aquos LC-40LE810E

Those voltage readings show that the AC-DET is working properly.
There must be something else wrong, Does the voltage on pin 1 disappear after 7 seconds also?

No sir. The voltage on pin 1 of pc7702 stays on and dosnet dissaper. I measure about 2volts

[Jstone86]

Re: Sharp aquos LC-40LE810E

Since you do have 3.25V PNL-POW control signal, so do you get 12V at the PNL-12V connector pin?

Sorry I am novice so a little confused where can I please locate PNL connector pin??

[budm]

Re: Sharp aquos LC-40LE810E

Sorry I am novice so a little confused where can I please locate PNL connector pin??

Please upload good clear pictures of YOUR board.

[Jstone86]

Re: Sharp aquos LC-40LE810E

Please upload good clear pictures of YOUR board.

Sorry for the late response. I have been having troubles in uploading the pictures here

[Jstone86]

Re: Sharp aquos LC-40LE810E

I am also noticed something and don't know if it's unusual with regards to PC7703
Both PIN 1 and 2, I get 2 volts which stays steady immediately I turn on the power of the TV but keep on fluctuating but never drops down beyond 2volts. It stays at 2volts but keep on fluctuating.
For PIN 3 and 4,immediately I turn on the power of the TV, I get 4 volts and it immediately back to 0 volts when the red light on the motherboard goes off.
I will upload pic of the red light on the motherboard for reference

[rievax_60]

Re: Sharp aquos LC-40LE810E

Pins 1 and 2 of PC7703 are on the live side. Leave them alone for now.
The schematic for the power supply can be found here,
If AC-DET is high while ever PS-ON is high, it means that the AC-DET is working properly.

[Jstone86]

Re: Sharp aquos LC-40LE810E

Pins 1 and 2 of PC7703 are on the live side. Leave them alone for now.
The schematic for the power supply can be found here,
If AC-DET is high while ever PS-ON is high, it means that the AC-DET is working properly.

So which way forward? At the moment am not sure about the next step to take maybe Budm can throw more light in regards to 12V PNL connector pin which I can't located on the motherboard except PL on the inverter board. Can guy help me located PNL-12V connector pin since guy have same TV model

[rievax_60]

Re: Sharp aquos LC-40LE810E

PNL-12V should be pin 1 of PL connector.