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lenovo t61p (T61p) Charging problem
https://vlab.su/viewtopic.php?f=58&t=33290
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pkurls [ 13 июн 2015, 16:57 ]
Заголовок сообщения:  lenovo t61p (T61p) Charging problem

hi
i have lenovo t61p laptop nvidia chipset i am facing problem about charging my laptop charge the bettry and but when i unplug the charger laptop shutdown ..... and not power up with charge bettry ..... any one hae a solution about this issue
Thanks

andromedax [ 13 июн 2015, 22:15 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

Measure and post voltages from all pins of Q10.

Вложение:
Q10.jpg

pkurls [ 14 июн 2015, 15:13 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

leg number 4 have 5v and 11 v on other legs

andromedax [ 14 июн 2015, 20:52 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

Measure voltage in drain of Q13 (VINT20) (with and without charger)

pkurls [ 14 июн 2015, 21:47 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

drain have 19v

andromedax [ 14 июн 2015, 22:29 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

pkurls писал(а):
drain have 19v

And without battery?

Sorry I wanted to say without Charger.

pkurls [ 14 июн 2015, 23:20 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

with out bettry

pkurls [ 15 июн 2015, 11:53 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

drain have 10 to 11 v with out charger ......

andromedax [ 15 июн 2015, 13:43 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

andromedax писал(а):
Measure voltage in drain of Q13 (VINT20) (with and without charger)

It is very important to know the value of VINT20 without charger.

pkurls [ 15 июн 2015, 14:32 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

Without charger give 9v and after plug the charger its give 19v

andromedax [ 15 июн 2015, 15:35 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

pkurls писал(а):
Without charger give 9v and after plug the charger its give 19v

It seems low voltage from battery. Bad battery?

How many volts is it rated? (check it in battery label)

pkurls [ 15 июн 2015, 15:47 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

battery is working on my working laptop thats problem in mainboard

andromedax [ 15 июн 2015, 19:17 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

pkurls писал(а):
battery is working on my working laptop thats problem in mainboard

Q10 has 11.7 volts in its drain, and is connected to the source of Q13.

If Q13 has 11.7 volts in its source, and 9 volts in its drain, (VINT20) then the internal diode are damaged, and mosfet Q13 seems not being saturated, so replace it whit a new one, or an equivalent.

Вложение:
Si4890DY.jpg

pkurls [ 23 июн 2015, 11:17 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

i have changed but have same problem

andromedax [ 23 июн 2015, 12:15 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

pkurls писал(а):
i have changed but have same problem

Do you get same voltage measurements as before?

Something don't match.

pkurls [ 23 июн 2015, 15:28 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

i changed q13 q10 all have same condition

andromedax [ 23 июн 2015, 19:26 ]
Заголовок сообщения:  Re: lenovo t61p (T61p) Charging problem

pkurls писал(а):
i changed q13 q10 all have same condition

Battery must have 10.8V, I'm not sure only 9 volts will be enough.
Вложение:
LTPIB049.jpg

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