Toshiba Satellite - Locks up when plugged in

[abo0badr]

Originally Posted by b700029

2000uF is fine, as I said desktop motherboards regularly use >10,000uF.

good evening sir, is using the 330uf tantalum 6.3V is ok with this one?? i could not find any other 2.5V tantalum capacitors here in my area..and if i order online they sell them on a minimum orders only and the shipment fee is more expensive than the capacitor

[ZEBU]

trebo
I am replacing the 900uf cap.
I saw earlier in this thread others with intention of rplacing same with 4 x 330.(or possibly 3 x 330 was suggested )
The RS supply suggested has opened up further possible combinations up to having availible a single 1000uf 4v cap(its quite small compared to the existing NEC/TONKIN).From memory there where in the 2.5 volt range some 470uf and 660uf.(I i can also obtain 330uf 2.5 volt from here in a pack of 5)
Having these choices curiosity kicked in and I was wondering what factors should influence choice....use more caps for insurance against bad caps.....is bigger better ...higher uf say 4 x 330 or 2x470 ....do it in one fell swoop of 1000uf cap. etc.....
are multiple caps more durable than one....would the MB tolerate much variation..
all these questions and more come to mind and though not needing an answer one still likes to learn.Even if its by others experience

[trebo]

Zebu
I cannot give you a answer with any certainty, best left to those who can
but my choice would be the pack of 5x330uf,
you can try 3 that would give 990uf, that is higher
and if that dont work put another one on
the gurus may suggest better

[ZEBU]

TKS TREBO
that is my intention.Appreciate your input

[Notsosure]

I too am not an expert but I believe 4x330uF from RS that I suggested might still work well for replacing the 900uF cap. A higher voltage apparently does not matter. Not sure what a higher uF would do but I would not really mind trying a 4x330uF in place of one 900uF cap. I had exactly the same dilemma but my OE128 replacement arrived first and I simply used it in my Toshiba A200 despite knowing that it has shorter life than the tantalum caps being suggested. My A200 is working perfectly now. I have included the details and a number of links, photographs, etc in another forum linked below:
http://www.tomshardware.com/forum/page-54070_35_50.html

[trebo]

Notsosure
you may be right, but 3 x 330 is about 10% higher
4 x 330 is about 50% higher
they say you can go a bit higher uf, but i would not be happy with 50%

3 x 330 tantlum caps got to be better than that nec/tokin 900 uf cap from what I have read on the subject

[Notsosure]

When I had looked at the diagram of OE128 it was referring to two pads being on the input side and the other two on the output side. If this is indeed the case then I would prefer to have equal uF on ether side. Why not consider using a 470uF cap on either side:
http://australia.rs-online.com/web/c...=470uf+low+esr

Of course, the safest way might be to get the exact replacement and wait for others to take a plunge first before you make up your mind for the next replacement, if necessary:
http://www.ebay.com/itm/1x-NEC-TOKIN...-/400248772449

[Notsosure]

Sorry, following is the more refined link for 470uF cap:
http://australia.rs-online.com/web/c...=470uf+low+esr

[trebo]

Originally Posted by Notsosure

When I had looked at the diagram of OE128 it was referring to two pads being on the input side and the other two on the output side. If this is indeed the case then I would prefer to have equal uF on ether side. Why not consider using a 470uF cap on either side:
http://australia.rs-online.com/web/c...=470uf+low+esr

Of course, the safest way might be to get the exact replacement and wait for others to take a plunge first before you make up your mind for the next replacement, if necessary:
http://www.ebay.com/itm/1x-NEC-TOKIN...-/400248772449

you could put all 3 caps on one side it would not make any diffrence,
the 2 positives are one, as are the 2 negatives as seen in this picture
http://badcaps.net/forum/showpost.ph...6&postcount=18

some members have replaced the nec/tokin with original only to find it go again if I recall, look at this link
http://badcaps.net/forum/showpost.ph...&postcount=125

[Notsosure]

trebo,

Which of the three photos shows that the positives are connected to each other? I know that OE128 itself connects the two negatives but it had two separate positives. The positive pads also appear far apart. Are they internally connected?

[trebo]

Originally Posted by Notsosure

trebo,

Which of the three photos shows that the positives are connected to each other? I know that OE128 itself connects the two negatives but it had two separate positives. The positive pads also appear far apart. Are they internally connected?

If I am not mistaken

[abo0badr]

Originally Posted by Notsosure

Sorry, following is the more refined link for 470uF cap:
http://australia.rs-online.com/web/c...=470uf+low+esr

sir, is it ok to use the 6.3v or 10v ones?? it doesn't matter? is it like any circuit which the 6.3v is the maximum it can handle? i am confused because in my area they only sell the 6.3v ones..i cannot find anymore 2.5v 330uf tantalum caps here..your response is so much appreciated

and what is the difference between the 330e75 and 330e3N?? thanks.

[Notsosure]

Yes, it is okay to use higher voltage caps since that essentially indicates the maximum voltage a cap can withstand. Go for 6.3V one, if possible. I have come across sources which suggest that even around 50% higher capacitance is okay:
http://www.niccomp.com/help/capsubguide.asp

However, I do agree with the general consensus that capacitance should not be too much higher. Also, look only for low-ESR ones with dimensions that can be accommodated.

I do not know answer to your last question.

[abo0badr]

Originally Posted by Notsosure

Yes, it is okay to use higher voltage caps since that essentially indicates the maximum voltage a cap can withstand. Go for 6.3V one, if possible. I have come across sources which suggest that even around 50% higher capacitance is okay:
http://www.niccomp.com/help/capsubguide.asp

However, I do agree with the general consensus that capacitance should not be too much higher. Also, look only for low-ESR ones with dimensions that can be accommodated.

I do not know answer to your last question.

thank you for the response. Ok then this will be a very big advantage for me. I will buy it maybe by tomorrow, but just another question about the ESR, is it ok to buy the ones with 0.045 ohms, or 0.01, i have seen some 0.1 also..the lower the better?? and the tolerance is 10%. is it recommended?? thank you

[abo0badr]

Can you please give me a choice between these? i am really confused, which is better to buy a Polymer series or just the Low ESR series?
here are some i saw from my local online shop (if it is ok with the admins to Post URL's):
http://philippines.rs-online.com/web...solid/6845250/

http://philippines.rs-online.com/web...solid/4613240/

http://philippines.rs-online.com/web...solid/6845250/

http://philippines.rs-online.com/web...solid/4648684/

[Notsosure]

Lower the ESR, the better it is.

The first and third links are the same. The second one has a higher leakage current and cost . The fourth one has a higher height. I would go for the first one itself. 10% tolerance is good enough anyway.

[abo0badr]

Originally Posted by Notsosure

Lower the ESR, the better it is.

The first and third links are the same. The second one has a higher leakage current and cost . The fourth one has a higher height. I would go for the first one itself. 10% tolerance is good enough anyway.

oh! sorry about the bad link it should be this one http://philippines.rs-online.com/web...solid/5483337/

thank you so much

btw, what should be the good leakage current and cost?? thanks

[Notsosure]

abo0badr,

In terms of specs and price there is really not much to choose between the two so you can take your pick. In terms of quality I have no idea which one is better so you may have to do your own research.

As regards understanding capacitor characteristics it might be a good idea to go through some relevant literature, such as:
http://www.electronics-tutorials.ws/...tor/cap_3.html

Best of luck!

[PCBONEZ]

To compare caps look at ESR and Ripple.
Lower ESR = Better
Higher Ripple = Better

Good specs does not imply quality though.
Lots of crap brands have great specs.
Stick to Japanese brands and you should be fine for quality.
.
.

[Notsosure]

I can confirm that the RS Stock No. 548-3337 (Manufacturer Part No. TPSD337K006R0045) that I have received is made in Czech Republic. These tantalum caps belong to TPS series with low ESR and high ripple current. Since I had already received OE128 earlier and replaced it, I am keeping these caps in spare. If anyone wants to have a look at the photos, they are here:
http://gs138.photobucket.com/groups/q251/S1BXDWUERU/