Ремонт: Ноутбуков, Компьютеров https://vlab.su/ |
|
GTX1070 Dual 8Gb не поднимает питание 5V https://vlab.su/viewtopic.php?f=48&t=123562 |
Страница 1 из 1 |
Pandemonium6 [ 18 фев 2022, 15:19 ] | |
Заголовок сообщения: | Re: GTX1070 Dual 8Gb не поднимает питание 5V |
Hi, only a thermal camera and a voltage injection will tell you the truth. Low resistance on 5V is caused many times by a capacitor far away from the regulator. It may activate under the stronger current but on the multimeter it may look good. Only voltage injection. |
StayeR [ 18 фев 2022, 15:32 ] | |
Заголовок сообщения: | Re: GTX1070 Dual 8Gb не поднимает питание 5V |
Pandemonium6 I applied 5V and 2A, the consumption is only 0.01A. With such consumption, nothing will warm up and the thermal imager will not help :( |
Pandemonium6 [ 18 фев 2022, 16:20 ] | |
Заголовок сообщения: | Re: GTX1070 Dual 8Gb не поднимает питание 5V |
So give it a 5V from the laboratory power supply and test the card. Sometimes the DC/DC converter may not start because it is not loaded. Maybe there is a 0R resistor somewhere in series. It may be far away from this regulator. Posted after 4 minutes 57 seconds: It can be your case: https://www.youtube.com/watch?v=lFyqRijbHZQ Watch all of these movies from around the world for practice. "There is a resistor connected on that line. When that capacitor went short, it drew so much current and caused that resistor to go open line. This is why there is no 12v. The resistor is R987 0 ohm on the right side of the board." It may be a similar case... |
StayeR [ 18 фев 2022, 18:41 ] | |
Заголовок сообщения: | Re: GTX1070 Dual 8Gb не поднимает питание 5V |
Pandemonium6 Thank you very much! Indeed, the problem was in a half-broken 0 resistor! Only on my board it has a different positional value, number SR325. It brings 12v to pin 2 of the DC/DC converter. After the replacement, 5V appeared everywhere. The only thing on the UP9511 is the VCC drawdown to 4.3v. On the rest of the PWM - 5v. 1.8v also appeared, but 1v is still not there. I think I need to change the GPU PWM again. Before that, he conducted an experiment - applied 5v from the laboratory unit. The video card started completely judging by consumption. But it was not restarted again from the laboratory block... |
Pandemonium6 [ 18 фев 2022, 18:58 ] | |
Заголовок сообщения: | Re: GTX1070 Dual 8Gb не поднимает питание 5V |
I had a small capacitor shorted behind 1R or 2R2 resistor. It was poorly visible on the thermal camera because this capacitor was behind a resistor. Search for the power near the PWM chip and your old PWM was probably good. |
StayeR [ 25 фев 2022, 18:45 ] | |
Заголовок сообщения: | Re: GTX1070 Dual 8Gb не поднимает питание 5V [РЕШЕНО] |
Pandemonium6 Hello! I find another problem with 0ohm resistor near GPU PWM IC 9511, it's power resistor +5v VCC :) Problem solved. Thanks! |
Страница 1 из 1 | Часовой пояс: UTC + 4 часа |
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group http://www.phpbb.com/ |