Sharp LC-C52700UN OPC Blinking.

[Ltank]

The Power an OPC led flash twice the pauses and same sequence over and over. I can jumper the Stby 5vdc to P.S.-ON and PNL-POW.
P.S. Stays on and I get 136vdc to LA1 and LA2 connectors on the A side (colored wires) 0vdc K side Cathode. I get no backlight. Trying to confirm the P.S. is OK. I get the 13vdc, 5vdc and PNL 12vdc. I would say the P.S. is fine. But wouldn't I get a backlight? I guess theM.B. is toast. I got one from a place online but got the same OPC Blinking error. So I thought perhaps I had a bad P.S. but it checks fine. M.B. or perhaps TCon?

[budm]

Re: Sharp LC-C52700UN OPC Blinking.

Are you getting >360VDC between the two legs of the MAIN FILTER caps when you force on the power supply?

http://www.shopjimmy.com/catalogsear...rp+LC-C52700UN

[Ltank]

Re: Sharp LC-C52700UN OPC Blinking.

Yea it's fine. I had confirmed my voltages as indicated. The voltage was not labeled for the led connectors but it was 136vdc.
No backlight though. Dark screen putting a flashlight on screen did no show any menu or anything.

[R_J]

Re: Sharp LC-C52700UN OPC Blinking.

If its the same as the LC-52LE700UN, Tried uploading the manual but got this error.
Looks like D3.3 volts could be missing.

[budm]

Re: Sharp LC-C52700UN OPC Blinking.

Just to see, keep the meter on the LED connector, then turn the TV on to see if the meter will show the DCV jump up a lot higher than 136VDC and then settle back down to 136VDC.

[Ltank]

Re: Sharp LC-C52700UN OPC Blinking.

I saw that about the 3.3vdc. There is no 3.3vdc listed on the P.S. oututs. All listed voltages are there. Including the 136vdc to the LED backlighting. I will set my meter to capture peak voltage and turn the set on. I will test it Monday morning. Thanks.

[R_J]

Re: Sharp LC-C52700UN OPC Blinking.

Looks like the D3.3 supply is on the main board, It comes from ur13 volts into pin (2) of ic9606 and comes out pin (3) D3.3v