Help me to identify this part

From a tft monitor, AOC LM700
Part is on the mainboard and partly burned, numbers readable look
like this:

XM15AV
?596S
...O P+

Package is 5 pin smd IC
Board location ID U304

Any idea?

Bart Bervoets

I have the feeling it could be a 5v regulator, digikey has a
LM2596S-5.0-ND in the list which points to 5V 3A regulator &
thermal limiter.
Would make sense on a mainboard but how sure can i be?

> XM15AV
> ?596S
> ..O P+

Would then be:
> XM15AV
LM2596S
5.O P+

As there's a 0 and no 3 i could exclude 3.3v and 12V
Making sense or am i missing the point here?

Bart Bervoets

Bart:
I'm working on an AOC TFT1560 monitor now. It has has a TO-220 case
5-pin
IC marked: LM2596S-5.0
It is a 150KHz 3A step-down power regulator used to convert the 12V
input to 5V for internal use.
My monitor is dead, although I can cause the backlight to turn-on,
there is no video image. Every once in a while, the monitor will
work OK, but be dead the next time I try it.
John

Yep, seems my guess was right.
Thanks, and yes, mine is dead, that ic is burned.
I have a vibrant monitor as well with just a white screen.
No burned parts.
What should i check first?

Bart Bervoets
<(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ups.com...
> Bart:
> I'm working on an AOC TFT1560 monitor now. It has has a TO-220 case
> 5-pin
> IC marked: LM2596S-5.0
> It is a 150KHz 3A step-down power regulator used to convert the 12V
> input to 5V for internal use.
> My monitor is dead, although I can cause the backlight to turn-on,
> there is no video image. Every once in a while, the monitor will
> work OK, but be dead the next time I try it.
> John
>

Bart Bervoets wrote:

> Yep, seems my guess was right.
> Thanks, and yes, mine is dead, that ic is burned.
> I have a vibrant monitor as well with just a white screen.
> No burned parts.
> What should i check first?

You just said that regulator chip is burnt. I'd sart by fixing that !

How old are these screens btw ? I recently heard that LCD monitors are
notoriously unreliable.

Graham

> You just said that regulator chip is burnt. I'd sart by fixing that !

No, that's another monitor, this one just shows blank, i'm stripping the
caps off
one by one and test with an esr meter.

Bart Bervoets