What is on the 3.3v rail on EDM-020

[SlaughterBree]

I’ll spare the back story but I’m not getting 3.3v and I was wondering where I should start looking? F7002 and F7003 area are fine (I’ve just fixed shorts on both of these) if you have images then that’s even better, thanks!

 

[FiXiNGA]

From my point of view the 3,3V from F7002 powering Southbridge and the WiFi Module.

 

[jkyoho]

From my point of view the 3,3V from F7002 powering Southbridge and the WiFi Module.

not true, edm020 differs from edm010. f7002 area no longer generates 3.3v

 

[SlaughterBree]

not true, edm020 differs from edm010. f7002 area no longer generates 3.3v

Southbridge is fine and so is the WiFi IC. Do you know where I should check? Or at least start?

 

[FiXiNGA]

not true, edm020 differs from edm010. f7002 area no longer generates 3.3v

Sorry. Correct, near that you will only find 1.8V for WiFi Module. 3.3V is from the backside directly behind this and is connected to 5V Standby.

Post automatically merged: Nov 9, 2023

Southbridge is fine and so is the WiFi IC. Do you know where I should check? Or at least start?

There is an IC on the back of the HDMI encoder. I had a board where the input and output of this IC was not shorted but defect. Then I got only 2.4V on some mearurements of the 3.3V

 

[SlaughterBree]

Sorry. Correct, near that you will only find 1.8V for WiFi Module. 3.3V is from the backside directly behind this and is connected to 5V Standby.

Post automatically merged: Nov 9, 2023

There is an IC on the back of the HDMI encoder. I had a board where the input and output of this IC was not shorted but defect. Then I got only 2.4V on some mearurements of the 3.3V

Is there any chance you could send a picture of exactly what I’m supposed to be checking? I’m not exactly a noob with motherboard repairs, but this is my 1st PS5

Post automatically merged: Nov 9, 2023

Now for some reason I’m not getting 12v into the board, no idea why, it was fine literally an hour ago on the 12v rail. The PSU is fine, might just scrap this unless anyone has any ideas

 

[SlaughterBree]

I’ve found the 12.2 issue. Dodgy mosfet near VRAM. Still issues with 3.3v rail. Does anyone know where I should start looking? Like any images or anything??

 

[SlaughterBree]

From my point of view the 3,3V from F7002 powering Southbridge and the WiFi Module.

I have just fit a new wifi module, would this be the issue? There’s no shorts or anything around the south bridge

Post automatically merged: Nov 14, 2023

So I found these, they are shorted. Would these be affecting 3.3v?