PlayStation 4 ADP-200ER PSU repair

[Johndill]

Hi, I have a power supply for a PlayStation 4 1200 series model ADP-200ER I'm wanting to repair for experience and save the price of buying a refurbished one on eBay and missing out on the experience and fun of doing it myself.

It had a small amout of cockroaches in it from the previous owner (fortunately they were gone when I got it) and they have shorted the PSU blowing the fuse, there is a small amount of roach debris on the output end of the board but no visible burns or damage anywhere, it looks physically ok.

I'm hoping that just the fuse is blown from possible pins being crossed by a roach and no damaged components but instead of buying a replacement fuse just for it to blow if there is damaged components, how do I go about testing a PSU with my multimeter to make sure everything looks good before replacing the fuse? I have never done PSU repair or testing before. Thanks

[sam_sam_sam]

Re: PlayStation 4 ADP-200ER PSU repair

Ok the first thing you need to do is get your self a 100 watt incandescent light bulb and socket with a pigtail and put where the fuse was an see if the unit will power ON

If the light bulb stay very bright you have a short some where
If the unit power ON then it might be safe to a fuse in and see what happens that way

Please be careful doing this work you are working with live main power voltage

If you do not have a power cord with outlet that has an on and off switch that is fused you should make one they come in handy

Let us know the results of this testing thanks

[budm]

Re: PlayStation 4 ADP-200ER PSU repair

https://www.badcaps.net/forum/attach...0&d=1512867306
1) Unit not plugged into outlet.
2) Measure the DC Voltage between the to legs of that big main filter cap laying on its side to see if it still has Voltage on it or not just to be sure, there should be no Voltage on it otherwise you will have to discharge the cap with resistor.
3) Check the resistance between the two legs of that cap, report the reading.

[Johndill]

Re: PlayStation 4 ADP-200ER PSU repair

https://www.badcaps.net/forum/attach...0&d=1512867306
1) Unit not plugged into outlet.
2) Measure the DC Voltage between the to legs of that big main filter cap laying on its side to see if it still has Voltage on it or not just to be sure, there should be no Voltage on it otherwise you will have to discharge the cap with resistor.
3) Check the resistance between the two legs of that cap, report the reading.

Hi, the voltage was 30.5mV and the resistance went up quickly then said O.L, afterwards it was at 130.5mV and showed 4.25m ohms

[Johndill]

Re: PlayStation 4 ADP-200ER PSU repair

I've found where the short happened, doesn't look too bad. I'm setting up the bulb trick now to test.

[Johndill]

Re: PlayStation 4 ADP-200ER PSU repair

Ok the first thing you need to do is get your self a 100 watt incandescent light bulb and socket with a pigtail and put where the fuse was an see if the unit will power ON

If the light bulb stay very bright you have a short some where
If the unit power ON then it might be safe to a fuse in and see what happens that way

Please be careful doing this work you are working with live main power voltage

If you do not have a power cord with outlet that has an on and off switch that is fused you should make one they come in handy

Let us know the results of this testing thanks

Is this wired up correctly?

[sam_sam_sam]

Re: PlayStation 4 ADP-200ER PSU repair

Is this wired up correctly?

From looks of it it-looks correct but it also look like you have a short in this power supply if that light bulb is that bright

I would follow what Budm has said in his earlier post

1) Unit not plugged into outlet.
2) Measure the DC Voltage between the to legs of that big main filter cap laying on its side to see if it still has Voltage on it or not just to be sure, there should be no Voltage on it otherwise you will have to discharge the cap with resistor.
3) Check the resistance between the two legs of that cap, report the reading.

[budm]

Re: PlayStation 4 ADP-200ER PSU repair

Check the resistance between the Source pin and the Drain pin of that Q6.

[budm]

Re: PlayStation 4 ADP-200ER PSU repair

https://www.badcaps.net/forum/attach...1&d=1512867306
Can we get this picture that is in focused? It gives me headache when I try to trace the connections.

[sam_sam_sam]

Re: PlayStation 4 ADP-200ER PSU repair

I've found where the short happened, doesn't look too bad. I'm setting up the bulb trick now to test.

Now that looks like there might be a problem there in that section check parts for short and if necessary remove them to test them

What part are those where the solder has fallen out ?
What are the ohms reading of those parts ?

On that photo can you crop out everything out but the board once you have done this if you can not read the parts number on the board retake the photo thanks

[Johndill]

Re: PlayStation 4 ADP-200ER PSU repair

From looks of it it-looks correct but it also look like you have a short in this power supply if that light bulb is that bright

I would follow what Budm has said in his earlier post

1) Unit not plugged into outlet.
2) Measure the DC Voltage between the to legs of that big main filter cap laying on its side to see if it still has Voltage on it or not just to be sure, there should be no Voltage on it otherwise you will have to discharge the cap with resistor.
3) Check the resistance between the two legs of that cap, report the reading.

With cap discharged, resistance quickly goes up to about 30 ohms then says O.L.

[Johndill]

Re: PlayStation 4 ADP-200ER PSU repair

https://www.badcaps.net/forum/attach...1&d=1512867306
Can we get this picture that is in focused? It gives me headache when I try to trace the connections.

Picture

[Johndill]

Re: PlayStation 4 ADP-200ER PSU repair

Check the resistance between the Source pin and the Drain pin of that Q6.

Between point 1 and 2 is 1.875k ohms
Between point 2 and 3 is 0.2 ohms

[Johndill]

Re: PlayStation 4 ADP-200ER PSU repair

I found a good priced PSU in my country and bought one, so this is now a side project

[Johndill]

Re: PlayStation 4 ADP-200ER PSU repair

Picture

[momaka]

Re: PlayStation 4 ADP-200ER PSU repair

Between point 1 and 2 is 1.875k ohms
Between point 2 and 3 is 0.2 ohms

Looks like that MOSFET is shorted - at least in circuit. Remove from PSU and test resistance of the MOSFET pins again. If you still get 0.2 Ohms or some equally low reading between pins 2 and 3, then the MOSFET is bad. Additionally, if you get any resistance at all from the Gate (pin 1, looks like) to either pin 2 or 3, that's also a likely indication that the MOSFET is bad (in a MOSFET, the Gate is electrically insulated from both Source and Drain, so it should NOT show any resistance to those pins at all).

[budm]

Re: PlayStation 4 ADP-200ER PSU repair

If you have Gate to Drain shorts then you will need to replace the IC that drives the Gate also, plus you need to test all the parts between Gate drive output and the Gate too, otherwise you may end up blowing your new MOSFET.

[Johndill]

Re: PlayStation 4 ADP-200ER PSU repair

Looks like that MOSFET is shorted - at least in circuit. Remove from PSU and test resistance of the MOSFET pins again. If you still get 0.2 Ohms or some equally low reading between pins 2 and 3, then the MOSFET is bad. Additionally, if you get any resistance at all from the Gate (pin 1, looks like) to either pin 2 or 3, that's also a likely indication that the MOSFET is bad (in a MOSFET, the Gate is electrically insulated from both Source and Drain, so it should NOT show any resistance to those pins at all).

Took the MOSFET out of circuit and same results, I still get the 0.2 ohms reading, and yes there is resistance on pin 1 between the others of around 1.8 k ohms, so the MOSFET is bad, what else do I check before replacing the bad MOSFET? Also, what markings are important to find a replacement?

[stj]

Re: PlayStation 4 ADP-200ER PSU repair

you check/replace the parts feeding the gate pin.

[momaka]

Re: PlayStation 4 ADP-200ER PSU repair

... so the MOSFET is bad, what else do I check before replacing the bad MOSFET? Also, what markings are important to find a replacement?

Looks like resistors R99, R98, and diode D63 at the very least.
R99 should read 10 KOhms or less in circuit (or not more than 5% over 10k).
R98 looks like a 51 Ohm resistor. Again, it should read 51 Ohms or less.
D63 may or may not show a diode reading both ways, depending on what's in parallel with it. But it looks like there isn't anything, so if you get a good diode reading one way and nothing (infinite/open) the other way, then it's probably fine.

There may be more things that could have been damaged downstream, but it's unlikely.

As for the markings on the MOSFET: look for a 24N60M2. This is what I found:
https://cdn.badcaps-static.com/pdfs/...9c652c65e6.pdf
Looks like it's rated for 650V, 18 Amp, and 0.19 Ohms Rds_on