TV Sharp AQUOS LC-60LE635E TV not power ON

[markolino]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

Nomoresonys:

no my t-con original board is burnt out and not working.
i bought chinese via aliexpress, and it didn't work properly. was not compatible with my TV.
then I found a used original T-con board model tv LC60LE635E on the classifieds
and this one works properly

finally.
another tip.
do not buy a T-Con board from Aliexpress because they are not compatible with European TVs

[nomoresonys]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

I see, thanks for clarification, glad you got it working.

[Alschepmist]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

How do you forced the backlight to turn on?

[Clifton11283]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

Hi,

I also have a Sharp LC-60LE63E TV with Power supply board DPS-162KP B. Set was not switching on and when opened found R7900, IC7903 (physically cracked) and D7908 burnt. All parts have been replaced but R7900 and IC7903 were blown again (with a large spark) when supply has been switched on. Any idea what the problem might be please?

Thanks

Clifton11283

[nomoresonys]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

make sure the diode is not in backwards.

[Clifton11283]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

Hi,

Thanks for your reply.

Diode is soldered correctly. The only mistake I did to be honest is that resistor R7900 was 1/4W instead of 1/2W.

Clifton

[nomoresonys]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

can you post a good clear picture of the area?

[Clifton11283]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

Please find attached a pictures of the power supply board.

Thanks again for all your help.

[nomoresonys]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

did you mean D7905 instead of D7908? D7905 looks a little beat up, did you test it or change it out?

[Clifton11283]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

D7905 when tested with a multimeter looks fine. The black stain visible on the picture is due the spark done by R7900.

Thanks

Clifton

[nomoresonys]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

I would build one of these for a few bucks so your not constantly blowing components up, which wastes time and money: https://www.youtube.com/watch?v=k5oNQ1etN2c

[nomoresonys]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

I would set meter to ohm mode and check all the diodes and caps thats all not just the electrolytics on the board, all should read pretty high, report any with a low ohm reading.

[diif]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

Can I see a photo of the other side of the board. Check the component with three legs under the heatsink.

[Clifton11283]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

Thanks!!

[Clifton11283]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

During the weekend will try to do this test and get back to you.

[Clifton11283]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

Hi,

Please find attached a picture of the other side of the PCB. Attached please also find the circuit of the area where I am having issues maybe it helps you in helping me identify where the problem is.

Thanks

[Clifton11283]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

Hi,

I have just found low resistance on capacitor c7901 and instead of 100pf it's capacitance is 30pf. Could it be this js the main problem shorting IC 7903 and R7900?

Thanks

[nomoresonys]

Re: TV Sharp AQUOS LC-60LE635E TV not power ON

could very well be, change it out and see what you get, also measure it out of circuit if you didnt, to be sure.

[sda]

A follow up on a similar fault -
Error 2 X flash slow / 5X flash fast
Check 12V on T-Con
If varying from 6~10V replace Q7120 12V regulator on the delta board p/n KIA378R12P