Dell WFP 2007 No image

[selldoor]

Re: Dell WFP 2007 No image

Are you talking about F1 on the USB/SUB power supply board?
https://www.badcaps.net/forum/showth...124#post241124

I dont think so ?:
https://www.badcaps.net/forum/showpo...6&postcount=32

[budm]

Re: Dell WFP 2007 No image

Are you talking about F1 on the USB/SUB power supply board?
https://www.badcaps.net/forum/showth...124#post241124

[noisepc]

Re: Dell WFP 2007 No image

Ok, guys I have more news about this problem. We have replaced F1 (fuse) and it blow up again, but this time worst, cuz now the display does not even start.

Any thought?

Do you know if Dell sells the entire board?

Thanks in advance!

[noisepc]

Re: Dell WFP 2007 No image

I have a friend that can do the job. Let´s see if I can find the replacement.

BTW: Has someone take a look to the Caps measures I uploaded?

[Jasgriff]

Re: Dell WFP 2007 No image

I am sure that Budm's workshop could match that. Might not be as organized though.

The second video would be the way that I would do it. If you have a practice board have a go at taking them off and putting them back on that will give you the confidence to do it.

[noisepc]

Re: Dell WFP 2007 No image

LOL YEAHHH I Just bought all that stuff!! HAHAHAHAHAHA.

I really would like to know why the fuse went away, cuz If I replaced it what are the possibilities to blow up again?

[selldoor]

Re: Dell WFP 2007 No image

Like I suggested you could just piggyback it.

If you are sure it is open, its not going to matter if it breaks.

Obviously you are going to need a few extra tools - like this - hah hah

http://www.youtube.com/watch?v=NbQxU...endscreen&NR=1

Or you could do this http://www.youtube.com/watch?v=TyUm6hJ2vK0

[noisepc]

Re: Dell WFP 2007 No image

Great Video!!!! I really would like to have that pulse!!! LOL, my hands shakes like a brazilian butt :P .

What I don't know yet, is how to remove the bad fuse.

[retiredcaps]

Re: Dell WFP 2007 No image

There are videos on soldering smd components on youtube

CuriousInventor makes excellent soldering videos. Excellent focus, clarity, and great explanations on WHY the techniques work or not work.

http://www.youtube.com/watch?v=3NN7UGWYmBY

[noisepc]

Re: Dell WFP 2007 No image

Thanks!!! Now, I´m wondering what was the root cause that blows the fuse.

[selldoor]

Re: Dell WFP 2007 No image

Yes - steady hand, steady eye, tweezers and a lot of luck.

There are videos on soldering smd components on youtube
http://www.youtube.com/watch?v=EWeAOemTY_E
However before going to a lot of effort you can "piggy back" it that means put a new fuse on top of the old one. You could even use a non smd fuse to try

You need to get the correct rating
https://cdn.badcaps-static.com/pdfs/...5edad6270b.pdf

[noisepc]

Re: Dell WFP 2007 No image

1 on the left , is it possible to replace this tiny fuse?

[retiredcaps]

Re: Dell WFP 2007 No image

1) Never use continuity to test a fuse, always use resistance. A good fuse should measure less than 1.0 ohms. Resistance is always tested with power off and device unplugged from the wall outlet.

2) Put your multimeter on 200 ohms.

3) Put your red probe on one side of F1. Put your black on the other side of F1.

4) If the multimeter is showing "1" on the left hand side on the screen (like it does when the probes aren't touching), that tells you that the fuse is greater than 200 ohms. This means the fuse is blown or bad.

Don't confuse "1" on the left hand side of this display with 1.0 on the right hand side. The first means out of range and the second means 1.0 unit of your measurement.

[noisepc]

Re: Dell WFP 2007 No image

I was able to collect some data with the multimeter:

LOGIC BOARD

C128= 22,9
C148= 22,8
C155= 22,8
C57 = 22,8
C35 = 22,8
C19 = 22,8
C81 = 22,8
C89 = 22,8
C98 = 22,8
C96 = 22,8
C144= 22,8

C58 = 17,6
C24 = 17,6
C61 = 17,5
C34 = 17,5

C142 = 19,8

C153 = 03,2
C152 = 03,2
C158 = 03,2
C64 = 03,2
C90 = 03,2


MEMORY BOARD

C851 = 37,2
C858 = 36,6
C838 = 31,6
C801 = 37,2
C848 = 37,2

POWER BOARD

C713 = 06,2
C711 = 06,2
C712 = 06,1

C611 = 25,7
C606 = 23


USB BOARD

C35 = 24,8
C43 = 24,6
C59 = 24,1
C49 = 24,2
C33 = 18,9
C50 = 07,8

C60 = 02,2
C44 = 02,9
C4 = 02,2
C8 = 02,2
C5 = 02,2
C9 = 02,2


And also able to test continuity from F1 Fuse. Please see the picture below

[noisepc]

Re: Dell WFP 2007 No image

I tested continuity on F1 but there is not continuity. Your thoughts?

[noisepc]

Re: Dell WFP 2007 No image

Ok, guys, I bought the multimeter but I was only able to get UT33C not D. Now what should I do? If someone has time to guide thru this via chat would be great! my msn address is nicolaslorda@hotmail.com

Thanks in advance!!!

[retiredcaps]

Re: Dell WFP 2007 No image

I've found this one? Does it do the job?

http://articulo.mercadolibre.com.ar/...12-digitos-_JM

It will work, but if you can pay a little bit more, this one has some decent reviews at

http://articulo.mercadolibre.com.ar/...baw-ut-33d-_JM

See

http://www.eevblog.com/forum/product...wn-and-review/

[Jasgriff]

Re: Dell WFP 2007 No image

Thats looks ok I cannot work out how much it is though. Retiredcaps is great at finding good multimeters at good prices.

[noisepc]

Re: Dell WFP 2007 No image

My friend multitester is broken, therefore I'm gonna have to buy one. Any recommendations?

I've found this one? Does it do the job?

http://articulo.mercadolibre.com.ar/...12-digitos-_JM

[retiredcaps]

Re: Dell WFP 2007 No image

Yes.