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PS5 power supply

banjomaniac

Mar 3, 2013
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I've been watching repairs on these adp-400FR Playstation 5 power supplies and need some help. I tested several components and think I have some bad mosfet's but not sure. They are 6NA3R4L 219K1E and on the drain to source I'm getting a short. Also found a burnt spot and not sure how to test what look like capacitors, the blue parts in photo. The big Caps on the board are charging up so maybe it's those mosfet's? Pics attached. Thanks, Banjomaniac
 

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Martaine2005

May 12, 2015
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What’s NOT happening with the PSU?.
Those blue X1/Y1 caps are safety caps. Are they shorted?. You can temporarily remove them for testing purposes.
Lift a leg or remove the mosfets. Is a short still present without the mosfets?.


Martin
 

Bluejets

Oct 5, 2014
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You need to isolate each device.
Tests in circuit will be inaccurate.
High frequency windings can appear to be shorted to those who know nothing about smps.
More likely bad/leaky electrolytics or any X2 caps rather than the small blue ones.
Switcher IC's in these power supplies work really hot and hard as well.
I'd be looking there.
Plenty of videos on smps on the internet, pays to do some homework.
 

H2814D

Nov 4, 2017
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Take full and clear shots of both the top and bottom of the board, so we can see all of the components and solder joints clearly. That helps quite a bit. And as instructed by Martaine, what isn't happening now? Was it working before? Did something happen that you know about that made it stop working now?
 
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banjomaniac

Mar 3, 2013
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A coworker gave this to me and I told her I would look at it but she said a surge or lightning might have damaged it but it has no voltage output at all. I bought a another supply but it didn't fit it's the same case and voltage but they moved the output jack. I think the AC side of this is working. Connected to power those big Caps are charging up, I can do it again but it was almost 400v. Also I think the output might be shorted, when I put the leads in continuity mode in the output jack it isn't dead shorted but it quickly goes to 40 ohms? I think those output transistors 6NA3R4L might be the culprit but if I was sure of anything I wouldn't be asking the experts.
 

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roughshawd

Jul 13, 2020
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Left us idiots out of the thread .....
Electronics don't work without idiots. Hey, you could be right. Swap the mosfets. But there is one thing... Lightning is ...
Kind of ...
Destructive.
How much for a replacement mother board? (Why USA used modems and riser cards)
 

banjomaniac

Mar 3, 2013
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So I'm gonna connect some clip on test leads to the DC in on the motherboard and the clip the other end on my power supply that doesn't fit and see if the unit powers on, if so I'll continue with the diagnosis. Been watching ToltecMerc on YouTube, he is really good but I'm gonna try and fix this. I can't find those mosfet's or power transistors 6NA3R4L
 

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H2814D

Nov 4, 2017
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Bad idea...........:eek:
I think he is talking about the other power supply he purchased, which we will assume is good. That's the one with the different output connection location on the pcb, just to see if the motherboard energizes, before he continues on with the troubleshooting of the failed power supply above. If the output voltages are the same, and the output jack has the same polarity, it might not be a bad idea.
 

H2814D

Nov 4, 2017
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So I'm gonna connect some clip on test leads to the DC in on the motherboard and the clip the other end on my power supply that doesn't fit and see if the unit powers on, if so I'll continue with the diagnosis. Been watching ToltecMerc on YouTube, he is really good but I'm gonna try and fix this. I can't find those mosfet's or power transistors 6NA3R4L
Before you do that, measure the output voltage from the power supply you purchased, and also make sure the pin polarity and output voltages are the same on both boards. They should be, but check to make sure. If the board powers up, let us know.

As far as those components, the proper way to test them is by removing them from the pcb. If you find something bad, we may be able to help with substitutions. Someone may be able to anyway.

Typically, a voltage spike will cause the power chips to short to ground, which would usually take out a fuse if you try and power it up. Since the caps are energizing, I would expect the mains voltage safety fuse to be intact.

One thing I did notice is what may be a bad solder joint on that pcb. Look at the pic I have attached. Look inside the red circle. Is that pin soldered properly still? The dark stuff near it may indicate a heat event as well. In any case, I would check all of the solder joints on the pcb for proper joint integrity.
 

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