PS4 pro PSU (ADP-300FR) shuts down when turning on 12V

[Norrecito]

Re: PS4 pro PSU (ADP-300FR) shuts down when turning on 12V

Apologies, I've just realized that I have misunderstood your question.

You meant the small tracks going from each pad of R112.

The first one (farthest from the 12V connector) goes to R155 (280 ohm resistor) then through a zero ohm resistor, goes to the 3rd leg of IC151 (DNP012AH)

The second track goes to D135 and ZD123 and the 12th leg of IC151.

Both tracks are undamaged.

[Norrecito]

Re: PS4 pro PSU (ADP-300FR) shuts down when turning on 12V

R112 underside, 1miliohm resistor to monitor current - where do those long tracks go and is the resistor and tracks o.k.?

First of all, thanks for taking your time to help me

Measured R112 and it's 0.2 ohm.

The big tracks from R112 go to the middle 2 legs of T2 through a "jumper" on the other side of the board. (I drew it on the attached picture as well as another jumper that leads to a different section).

The tracks are not damaged (verified with my multimeter).

[stj]

Re: PS4 pro PSU (ADP-300FR) shuts down when turning on 12V

R112 underside, 1miliohm resistor to monitor current - where do those long tracks go and is the resistor and tracks o.k.?

[Norrecito]

Re: PS4 pro PSU (ADP-300FR) shuts down when turning on 12V

maybe it wont run without a load on every voltage

Unfortunately this is not the case

Every single tutorial I've found shows the 12V line working without putting any dummy load on it. All it requires is to connect the mentioned two pins on the small connector (which also supplies 5V).

[stj]

Re: PS4 pro PSU (ADP-300FR) shuts down when turning on 12V

maybe it wont run without a load on every voltage

[Norrecito]

Re: PS4 pro PSU (ADP-300FR) shuts down when turning on 12V

did you test it on a dummy load and not in the ps4?

I have tested the 12V line with a 12V ligthbulb but same result (didn't even lit for a second).

Haven't tested the 5V line with any load just yet.

[stj]

Re: PS4 pro PSU (ADP-300FR) shuts down when turning on 12V

did you test it on a dummy load and not in the ps4?

[Norrecito]

Hello all,

I would like to ask for your help to troubleshoot a faulty PS4 pro power supply (ADP-300FR).

A couple of weeks ago, I've picked up a PS4 Pro (CUH-7216B) from one of the local flee markets. According to the seller, it has a "no power" issue and the PSU is most likely faulty. Based on the cracks on the housing, it was probably dropped.

Tried it at home and sure enough, it had a "no power" issue. (Pressing either the power or eject buttons had no effect).

I took out the PSU and opened it. Immediately noticed that both transformers (marked as "T1" and "T2") are damaged. Their legs on the low voltage side are broken. (Looks like fall damage to me) Some of the pads where the legs are soldered are slightly lifted. (One pad is missing but that's a "no connect") I saw no burned component or anything else that was out of place.

Talked with several people who repair PS4 Pros and found one who was willing to sell these transformers to me. He took them out of a ADP-300CR PSU but both PSUs use these 2 transformers according to him and this seems to be right.

Soldered in both new transformers and after reassembly, the PS4 pro finally showed the first sign of life. After pressing either the eject or power button, I can hear a beep and the blue light comes up for like 2 second and it goes off (without a second beep!). Pressing either buttons again results in nothing. I have to unplug it for a couple of seconds and plug it back in order to reproduce the previous behavior.

Took out of the PSU again to make some measurements and came to the following:
I have 5v standby and its stable. As soon as I try to turn on the the 12v line by connecting "5VSB" and "ACDC_STBY" (I have soldered two cables connected to a switch so I dont have to short them using a tweezer), the whole PSU turns off and remains off until I unplug it and plug it back. It's basically the same behavior that the PS4 produces so I came to a conclusion that its a PSU problem.

Measurements on the small connector (when "5VSB" and "ACDC_STBY" are NOT connected)
ACIN_DET: 4.8V
ACDC_STBY: 0V
GND: 0V
5VSB: 4.83V

When they are connected, both "5VSB" and "ACIN_DET" falls under 1V and keeps decreasing. (The PSU seems to shut down)

Since then:
-I have unsoldered and tested every single through-hole MOSFET (Q3, Q4, Q6, Q102, Q101) (and a diode: D11) and all of them tested okay (I'm using a cheap component tester from aliexpres).
-Checked the through-hole resistors (R5, R103) and all of them are okay (AFAIK the big one acts as a fuse and all of them should have very low resistance. Both are 3 ohms in my case.)
-Checked for shorts in obvious places (ICs, MOSFETs, capacitors, 12V, 5V connector) but found none.

I could not find the schematics of this PSU (ADP-300FR) however someone made a schematics for ADP-240AR which has many things in common (including some of the ICs) so I have attached it.

I've also found some YouTube videos where yet another PSU is explained (ADP-200ER) but I'm not sure if I'm allowed to link them here.

Any help is much appreciated. I've already spent like 2 weeks trying to figure out the issue and it's driving me insane