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Gigabyte Rx 570 4GB - Only 12v and 3.3v
https://vlab.su/viewtopic.php?f=48&t=101056		 Страница 1 из 1
TheMArcos [ 26 мар 2020, 20:30 ]
Заголовок сообщения:  Gigabyte Rx 570 4GB - Only 12v and 3.3v
hello everyone, could someone give me a guide to resurrect this card, on the pcb I have 12v (which reach the mosfets) the 5 turns on the regulator outputs and 3.3 on the pins 1 and 8 of the bios chip and the vcc on the IR3567 , also own the 1.8V in Saidan the GS7103, GS7256 bring us have only 12V according to the image.
ps: are 2 GS7256, both with these measures

I believe that the lack of enable is causing the non-operation of the circuits, someone would know to inform where this enable is generated so that I start my search.

]Изображение
TheMArcos [ 28 мар 2020, 03:38 ]
Заголовок сообщения:  Re: Gigabyte Rx 570 4GB - Only 12v and 3.3v
when replacing the apw8713 the voltages returned to the vrm and the memories however do not have the 0.9 volts in this phase:

Изображение

from what I understand this switching is done by a GS7256, but I only have 12v on pins 1 and 5, would anyone know to tell me where the enable for this pwm comes from?
RL500: 112.7ohms
merlin [ 28 мар 2020, 15:06 ]
Заголовок сообщения:  Re: Gigabyte Rx 570 4GB - Only 12v and 3.3v
enable - 7 pin of GS7256, chek connected to NPN trasis around... (may be Q1604?)
TheMArcos [ 28 мар 2020, 20:19 ]
Заголовок сообщения:  Re: Gigabyte Rx 570 4GB - Only 12v and 3.3v  [РЕШЕНО]
merlin писал(а):
enable - 7 pin of GS7256, chek connected to NPN trasis around... (may be Q1604?)


this, seriously enable pin 7, but in the multimeter there was no voltage there, thanks for the answer, for example, to see the image on a pcb there was no gpu installed on a 110 ohm coil resistance, to resell a gpu the resistance dropped to 19, and the Gs returned to work, apparently he was in protection, problem solved I will close the topic.
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