How to replace nec/tokin OE128 in laptop motherboard?

[hitmen]

Re: How to replace nec/tokin OE128 in laptop motherboard?

That should have worked. Did you take a picture of that arrangement?

Pic is abov in post #109.

[rievax_60]

Re: How to replace nec/tokin OE128 in laptop motherboard?

Pic is abov in post #109.

I cant see any links in that post.

[hitmen]

Re: How to replace nec/tokin OE128 in laptop motherboard?

I cant see any links in that post.

[rievax_60]

Re: How to replace nec/tokin OE128 in laptop motherboard?

Do you understand that the outer + strips are likely not connected in the PCB?
This will cause no power to get from the Vcore regulator to the CPU.
Take some continuity measurements to confirm.

[hitmen]

Re: How to replace nec/tokin OE128 in laptop motherboard?

Do you understand that the outer + strips are likely not connected in the PCB?
This will cause no power to get from the Vcore regulator to the CPU.
Take some continuity measurements to confirm.

I cheked it once before, but two inner - strips already connected but i checked to connect outer also but nothing happened.

[rievax_60]

Re: How to replace nec/tokin OE128 in laptop motherboard?

I dont think you have really done what I have been trying to explain.
I will wait until you figure it out and send another picture.

[hitmen]

Re: How to replace nec/tokin OE128 in laptop motherboard?

ok, i will upload its pic.
Thanks.

[hitmen]

Re: How to replace nec/tokin OE128 in laptop motherboard?

Hi all,
I am come back after long time b coz i was so busy and even my laptop still in problem and i couldnt gave it time for repairing. . .
Frndz . . !
I find a new thing about my laptop problem, i think it is real problem of my laptop is that, i find 8 terminals device(IC) fired/burried near the battry.


What happened if this one damaged/fired? And how can i replace it??
Please please suggest me.

[dj_ricoh]

Re: How to replace nec/tokin OE128 in laptop motherboard?

yes you can replace it.
we need to know what is it. changing that mosfet soic8 it takes about 1 min to change after you found out what is that and what you need to put back.

[hitmen]

Re: How to replace nec/tokin OE128 in laptop motherboard?

yes you can replace it.
we need to know what is it. changing that mosfet soic8 it takes about 1 min to change after you found out what is that and what you need to put back.

I think, it is 8(4+4) terminals IC which is shown in given pic near the batry.and
PG2AG
FDS
6900S Written on it.
How and with i can replace it and acording to ur mind what is its function in mothrbord ??

[rievax_60]

Re: How to replace nec/tokin OE128 in laptop motherboard?

I think, it is 8(4+4) terminals IC which is shown in given pic near the batry.and
PG2AG
FDS
6900S Written on it.
How and with i can replace it and acording to ur mind what is its function in mothrbord ??

That part contains two MOSFETs used in a Buck converter for battery charging. Why do you think it is faulty?

[rievax_60]

Re: How to replace nec/tokin OE128 in laptop motherboard?

The capacitors AND the links need to be fitted at the same time.
The Vcore voltage needs to get to the CPU.
Are you too young to understand this?
It is likely that you have caused extra damage by now.

[hitmen]

Re: How to replace nec/tokin OE128 in laptop motherboard?

yes you can replace it.
we need to know what is it. changing that mosfet soic8 it takes about 1 min to change after you found out what is that and what you need to put back.

That part contains two MOSFETs used in a Buck converter for battery charging. Why do you think it is faulty?

I saw smoke from this when i supplied power and checking differend devices on motherbord by connecting their lines. When i connectio two sides of a capacitor which is shown in pic near mosfet, i saw smoke and smell.

[rievax_60]

Re: How to replace nec/tokin OE128 in laptop motherboard?

I saw smoke from this when i supplied power and checking differend devices on motherbord by connecting their lines. When i connectio two sides of a capacitor which is shown in pic near mosfet, i saw smoke and smell.

If the MOSFET is really only for charging. It might be ok just to remove it for now until you fix the other problems. The part near the MOSFET marked with "T" is a fuse.

[hitmen]

Re: How to replace nec/tokin OE128 in laptop motherboard?

If the MOSFET is really only for charging. It might be ok just to remove it for now until you fix the other problems. The part near the MOSFET marked with "T" is a fuse.

Before damaging it, laptop's indicators light up for a bit sec whenever i press powr butn.but now nothng hapend with indicatrz and fan etc, laptop is likely to dead.

[eniac22]

Re: How to replace nec/tokin OE128 in laptop motherboard?

I replace the nec tokin (oe907) on toshiba a300 laptop with same chip but now i have no image on the screen, is possible if replace the chip again with 4 capacitor will work?

[Th3_uN1Qu3]

Re: How to replace nec/tokin OE128 in laptop motherboard?

Yes. You should never replace nec/tokin capacitor with same, the laptop will fail again as the nec/tokin parts have short life times and are especially affected by heat (such as soldering).

[atsio]

Re: How to replace nec/tokin OE128 in laptop motherboard?

I do not agree. I always replace with Tokin again and never had problem. You have to be carefull when soldering the Tokin not to damage it.

[eniac22]

Re: How to replace nec/tokin OE128 in laptop motherboard?

i was use my reballing station to remove the chip and because want come off easily i am afraid that overhead the whole area, also i find that to remove easy the chip must put also a bit of solder.
After remove the tokin i place the new one and heat it about 5-6 sec

[atsio]

Re: How to replace nec/tokin OE128 in laptop motherboard?

You don't mind destroying the old Tokin on removal. Before you solder the new one, remove the unleaded tin from the pads, apply leaded tin, bring your board to 190 degrees with the preheater and you are done.