toshiba satellite L300D issue after repair

[c4passion]

Hi all, i have repaired a Toshiba satellite laptop, it have a burned mossfet FDS6675BZ from the ac power in zone.
It makes the laptop no getting power from ac but it's was working fine with battery.
After 2 years finally I started the fix and I have replaced the burned mossfet by another one.
Now I plug the ac adaptor and it's back to life.... Or not.
Charges the battery ok, I try to power on, green led ( ok it's working ) , orange led ( battery is plugged and ac too, not good signal), blinking orange led like it's out of charge and turn off itself, good let's try without battery... I get the same, let's try with battery and without ac cord, the same....

What's happening here?

Here is a pic

[ktmmotocross]

Re: toshiba satellite L300D issue after repair

it is charging so check all pins on ic

[c4passion]

Re: toshiba satellite L300D issue after repair

What ic? U502?
I'm not an expertise technician, only amateur.

[ktmmotocross]

Re: toshiba satellite L300D issue after repair

Look in schematic. It can be 502 or some on the other side.

[c4passion]

Re: toshiba satellite L300D issue after repair

and please, where i can find the schematic of this board¿?
I have serached some schematics in some webs, but i cant find mine:
6050A2170201 - MB - A03

Thanks for the answer, i have hope on this repair....

[ktmmotocross]

Re: toshiba satellite L300D issue after repair

Search the forum

[dj_ricoh]

Re: toshiba satellite L300D issue after repair

It took me 30 sec and I found it!
look

change U503 and your good to go.

[sparker1]

Re: toshiba satellite L300D issue after repair

Try this one.

[c4passion]

Re: toshiba satellite L300D issue after repair

the only one thats seems similar to u503 is u502 in my board ( u503 is totally different in mine, not an IC ) it have other numbers in it, i will search it.
Thanks for the advice.... you are helping me too much.
when i have located it, which mesures i need to do¿? is my fisrt time doing this :P

[c4passion]

Re: toshiba satellite L300D issue after repair

well, i have located de schematic for de IC, in my case is BQ24721C ( U502 )
now, i dont know what mesures i have to do... if someone can help me?
Thanks in advance.

[ktmmotocross]

Re: toshiba satellite L300D issue after repair

it is not the right schematic

[c4passion]

Re: toshiba satellite L300D issue after repair

it is not the right schematic

Well, this is curious, and at this point I'm lost.
I can't find a u503 with the specs of dj_Ricoh post, I can't find an specific schematics for my board and now when I search schematics for the u502 ic, you tell me that's not the right schematic?

In fact I can post a full image of my board.

[ktmmotocross]

Re: toshiba satellite L300D issue after repair

oh. so dj have bad schema. u502 is charger ic so there are no other on board.

check all his pins. with and without charger

[atsio]

Re: toshiba satellite L300D issue after repair

Check this

https://cdn.badcaps-static.com/pdfs/...c71c98d76d.pdf

[c4passion]

Re: toshiba satellite L300D issue after repair

Thanks, I will check.

[c4passion]

Re: toshiba satellite L300D issue after repair

thats the mesures with AC pluged in:
1 3.36
2 2.71
3 19
4 19
5 1.30
6 2.85
7 0
8 1.46
9 4.46
10 0
11 4.93
12 4.60
13 3.35
14 3.35
15 4.47
16 0.18
17 0.20
18 0.68
19 0.70
20 0.64
21 0
22 0
23 18.96
24 18.96
25 0.01
26 0
27 0
28 2.92
29 0.70
30 0.70
31 2.80
32 2.92

without AC and battery off i get 0v in all ( i think its obvious )
accidentaly i have shorted the ic and burned a small capacitor near L500, is too small, i have tested continuity on it, and i get nothing... where i can get one of them?
I have searched for schematic of my board.... i give up, i have found 10000 schematics, but none of them are for my board

[c4passion]

Re: toshiba satellite L300D issue after repair

any tip¿?

[c4passion]

Re: toshiba satellite L300D issue after repair

i have finded the burned capacitor values, and i have buyed it from ebay.
The next thing i want to fix is the main issue, i have to replace the U502 IC ?

[c4passion]

Re: toshiba satellite L300D issue after repair

something? i have to replace the u502 IC? any tip?

[ktmmotocross]

Re: toshiba satellite L300D issue after repair

if u cannot find the right schematic u can check the ic datasheet.

the right shematic u find if u search for the board code