Asus VW223

[AkumAone]

Due to being an idiot, I have destroyed a component and have no idea what is was.
I remember measuring 0.6V drop across upper and lower legs, but a short in the middle, so i thought it was shorted... but after removing it, I still head a short. Then I found the shorted capacitor, but lost the removed component.

It is on the T-Con board (on a Chi Mei panel), a SOT-23-6 package device, marked as D2. DNʀ is printed on the case.(or is it?)
The middle left leg is ground, middle right in the output of the boost converter

Does anyone have any tips, on how to find the part number???

PS: Do not mind the mess around the fuse and the cracked L1 inductor.

[budm]

Re: Asus VW223

Please edit your post and use the attachment function to upload the picturess, do not post pictures in line.
It looks like 3-diode array similar to this:
http://s807.photobucket.com/user/bud...53805300340932

[wobbin]

Re: Asus VW223

On picture 9 the one end of inductor L1 looks broken to me ?

Edit - D'oh ! Just seen your original note re L1...

[AkumAone]

Re: Asus VW223

Thanks for the replies.

I dont think it is the same component.
None of the pads are connected.

[AkumAone]

Re: Asus VW223

Here is the picture without the component.
Pin 2 is AVDD1 13.26V, pin 5 is ground.

I suppose the circuit should generate VGH1 and VGL1 signals, and the diodes are a part of a charge pump. So budm may be right.

[AkumAone]

Re: Asus VW223

Further thoughts:
Based on circuits on pictures 2 and 3, the component could look like picture 1.
But it does not seem to exist, so I am obviously desperate.

Or is it just 2 diodes, with pin 2 and 5 NC?

[Duncanbest]

Re: Asus VW223

FYI

DN for BAV99BDWGP SC-88/SOT-363



In budm case:

KAD for MMBD4448HTM SOT-26

[momaka]

Re: Asus VW223

Or is it just 2 diodes, with pin 2 and 5 NC?

Pin 2 and 5 are definitely needed, otherwise the caps in the VGH/VGL charge pumps won't charge.

You could technically create this from discrete SMD diodes, but it won't look that good .

[AkumAone]

Re: Asus VW223

I found a MMBD3004BRM-7-F, soldered it to a sot-23 adapter, glued it to the panel board, soldered small jumper wires from point to point and the VGH rose to 25V, VGL drop to -0.5V. The monitor seemed to work, but the display was very dim. After the cracked inductor was replaced, it finaly worked as it should.

I am sorry, I could not take photographs, but here is an image of the sot-23 adapter.