Sharp LC-60c6600u no power.

[knoxrebel]

Sharp shows no signs of power(no blink codes, power led, backlight, picture or lights on boards)
I am getting ~170v on main filter caps, but getting nothing on the output of the board(13v,12v or 5V ) with or without other boards attached.

R7900 2.2ohm fusable resistor has failed open and D7950(schottky) has shorted, what else do i need to check before replacing these parts.

Power board model # apdp-153a1

EDIT: Should have checked IC7903 before replacing R7900, if IC wasn't bad before it definitely is now.

[budm]

Re: Sharp LC-60c6600u no power.

If the fusible resistor R7900 is blown open circuit then you need to check the internal MOSFET of the SMPS IC7903 (for standby power supply), you will need to look up the spec sheet of that IC.
Also check R7907 too.

Sharp RUNTKB285WJQZ Power Supply / LED Board
https://www.shopjimmy.com/sharp-runt...led-board.htm#

[knoxrebel]

Re: Sharp LC-60c6600u no power.

Thanks for still being here Budm.

I tested R7907 and its maked as 2.8ohm (red (silver or grey) gold gold). Meter initially shows 2.7 then settles at 2.1ohm.

See previous post edit: IC7903 will now need to be replaced.
Are there any other things i should test for with ic removed?

[budm]

Re: Sharp LC-60c6600u no power.

I see.
What is the IC P/N anyway?
Nothing at I can think of at the moment.

[knoxrebel]

Re: Sharp LC-60c6600u no power.

A6069h

[knoxrebel]

Re: Sharp LC-60c6600u no power.

BUDM thanks again. I not have a working tv and a 120hz gaming monitor thanks to you.

SOLVED

[Julio Romero]

Re: Sharp LC-60c6600u no power.

Hi.

So i have the same problem, so i will try changing the IC before resistor, is another thing that i must consider?