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Help about burnt chip in T23 system board
Help about burnt chip in T23 system board
Hello at the Forum!
I need help: in my ThinkPad T23, model 2647-2TG, burnt this chip, near battery connector, as following image:
http://www.4shared.com/photo/VwyF0QNpba ... 01425.html
Last 2 numbers on burnt chip seems "90A", so I soldered a "FDS 8690AS" desoldered from other (non T23) board.
But, before to mount and connect the battery, I would be sure that this is the right chip.
Can anyone help me?
Thank you in advance, Enzo.
I need help: in my ThinkPad T23, model 2647-2TG, burnt this chip, near battery connector, as following image:
http://www.4shared.com/photo/VwyF0QNpba ... 01425.html
Last 2 numbers on burnt chip seems "90A", so I soldered a "FDS 8690AS" desoldered from other (non T23) board.
But, before to mount and connect the battery, I would be sure that this is the right chip.
Can anyone help me?
Thank you in advance, Enzo.
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Re: Help about burnt chip in T23 system board
Welcome to the Forum.
According to the T23 circuit diagram that should be a Toshiba TPC8203, http://www.datasheetcatalog.com/datashe ... 8203.shtml
Don't know if that Fairchild FDS8690AS is fully compatible, https://www.fairchildsemi.com/pf/FD/FDS8690.html
You do the math.
According to the T23 circuit diagram that should be a Toshiba TPC8203, http://www.datasheetcatalog.com/datashe ... 8203.shtml
Don't know if that Fairchild FDS8690AS is fully compatible, https://www.fairchildsemi.com/pf/FD/FDS8690.html
You do the math.
Lovely day for a Guinness! (The Real Black Stuff)
Lenovo: X240, X250, T440p, T480, M900 Tiny.
PS: the old Boardroom website is still available on the Wayback Machine.
Lenovo: X240, X250, T440p, T480, M900 Tiny.
PS: the old Boardroom website is still available on the Wayback Machine.
Re: Help about burnt chip in T23 system board
Thank you VERY much!
However, for sure burnt chip was Fairchild, because Fairchild logo appear still in remaining part of chip.
I let you know how repair works!
P.S.: You're right!
Just checked (on Aliexpress) for Toshiba chip, and I discovered that now it is marked as FDS6690AS.
So, in my opinion, better thing is to insert this Toshiba chip.
I will order it now.
However, for sure burnt chip was Fairchild, because Fairchild logo appear still in remaining part of chip.
I let you know how repair works!
P.S.: You're right!
Just checked (on Aliexpress) for Toshiba chip, and I discovered that now it is marked as FDS6690AS.
So, in my opinion, better thing is to insert this Toshiba chip.
I will order it now.
Re: Help about burnt chip in T23 system board
Last news: I replaced it with an FDS6680A.
It don't burned again, but T23 don't boot. I think this is like a short circuit on board, because when I connect power supply, it sounds like a pulse.
So I suspect that some other component(s) are failed.
Can someone please post a schematic that can help me to diagnose failure?
Thank you.
It don't burned again, but T23 don't boot. I think this is like a short circuit on board, because when I connect power supply, it sounds like a pulse.
So I suspect that some other component(s) are failed.
Can someone please post a schematic that can help me to diagnose failure?
Thank you.
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- Admin Emeritus
- Posts: 23812
- Joined: Mon Sep 18, 2006 5:17 am
- Location: Loch Garman, Éire
Re: Help about burnt chip in T23 system board
Get it here:
http://elektrotanya.com/ibm_thinkpad_t2 ... nload.html
Scroll down to the bottom of the picture, a few lines down you'll see:
http://elektrotanya.com/ibm_thinkpad_t2 ... nload.html
Scroll down to the bottom of the picture, a few lines down you'll see:
Wait until you see:This file is downloadable free of charge: ...processing...
(You are not logged in, only 2 downloads per day possible for you.)
Then click on Get Manual to start the PDF download.This file is downloadable free of charge: Get Manual
(You are not logged in, only 2 downloads per day possible for you.)
Re: Help about burnt chip in T23 system board
Ok, thank you!
I hope to solve and resurrect my lovely Thinkpad!
I hope to solve and resurrect my lovely Thinkpad!
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