Sony PS4 power supply(smps) repair help [ADP-240CR AAC] - Page 1
Forum section: electronics / repair

author: DMK42
author_rank: Newbie
timestamp: February 19, 2025, 03:46:20 pm
content: Hi,So I got it "working" but have some doubts on replacing components one is a resistor R11(27.8 Ohm)on schematics which relates to the PFC circuit which I don't understand how it works but according to the data sheet it's labelled R-sense, the other is labelled F3,its seems to be a fusible resistor of 0.16Ohms.The question is I can't find these value resistors therefore can I replace them with something closer ie. 27 ohm wire wound resistor for R11 and a normal fuse or fusible resistor for F3The fault was R11 was failed short and F3 was open,found a roach near f3 but that doesn't explain R11 fault,but I checked mosfets and other components they all seem to be fine,the power supply would come on with 5v rail and standby working but as soon as the 12v rail was switched on the psu will shutdown and not turn on after.To test i jerry-rigged a resistor which came to 27.7Ohms and used a single strand of wire for F3.I think the power supply works fine now with output voltage of 11.8V.(no load)I plan to replace these components and hope for the best but is 27 Ohmsclose enough or should it be precise.Thank you.

author: bigendian
author_rank: Regular Contributor
timestamp: February 19, 2025, 05:06:44 pm
content: R11 in short ?

author: DMK42
author_rank: Newbie
timestamp: February 20, 2025, 12:28:21 am
content: yeah R11 is shorted and F3 is open

author: wraper
author_rank: Unknown
timestamp: February 20, 2025, 12:53:51 am
content: Solder original R11 back. No way original resistance should be as high as 27 ohms, I'd rather believe that figure is supposed to be milliohms. Also resistors do not fail short. PFC is most likely is not working anymore after your "fix" and just passes rectified mains voltage through the inductor with no voltage boost.

author: DMK42
author_rank: Newbie
timestamp: February 20, 2025, 04:07:35 am
content: Thanks for the reply!I checked the input capacitor voltage(12v rail on) which read 402v steady so if I'm correct the PFC works? I've attached pictures of the R11 which I read 27.8 based on colour code. Wire wound resistors rarely fail short I read somewhere. Thanks again, any help appreciated. Also R11 seems damaged not sure if its clear in the pictures.

author: wraper
author_rank: Unknown
timestamp: February 20, 2025, 04:14:21 am
content: I see no damage, it's a wire wound resistor, and again, resistors do not fail short. Yes it's 27.8 but I suspect those are milliohms (normal color band marking cannot properly describe resistance this low). Anyway, it's simply not possible to use 27 ohm resistor in there unless it's like <5W PSU for which nobody uses PFC to begin with. You may see it working under no significant load, but PFC won't work under normal load, and if it actually tries, those resistors will simply burn due to power dissipation.

author: DMK42
author_rank: Newbie
timestamp: February 20, 2025, 04:47:53 am
content: yeah your correct, the colour code of the resistor is weird and on the pfc ic datasheet IL(peak)=VILIM(typ=0.5v)/Rsense(R11), so R11 should be a very low value. And for F3 what should I replace with should it be 0.16 precise or will a normal fuse/fusible resistor do? Thanks for the help!

author: wraper
author_rank: Unknown
timestamp: February 20, 2025, 05:18:26 am
content: Use 0.16 or 0.15 Ohm 2W fusible resisor. Using around 3A fuse should be fine too.

author: bigendian
author_rank: Regular Contributor
timestamp: February 20, 2025, 07:58:03 am
content: Maybe is not a resistor nor a fuse, since also fuse color codes are like resistance. It looks to me a coil.

author: DMK42
author_rank: Newbie
timestamp: February 20, 2025, 12:42:48 pm
content: so in the pcb the input fuse is labelled F1 ,a ferrite bead is labelled FB15 and a inductor L101.so it's safe to guess that F3 is a fusible resistor I think? Also the PS4 powered ON