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iMac 24 PSU LITEON PA-3241-02A1 250W

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    Re: iMac 24 PSU LITEON PA-3241-02A1 250W

    Thanks mate,

    I will buy TO-220, with TO-220 mica, I think that it's sufficient.

    Thanks again

    Comment


      Re: iMac 24 PSU LITEON PA-3241-02A1 250W

      ?????

      With the ones you showed from ebay, plastic package, no insulator is necessary.

      BTW: Be careful there. That is only for 1 piece, not 2 as pictured. I hate when they do that. Tricky bastards!

      This is a better deal: http://www.ebay.com/itm/281410772068

      T
      Last edited by Toasty; 07-01-2017, 09:32 AM.
      veritas odium parit

      Comment


        Re: iMac 24 PSU LITEON PA-3241-02A1 250W

        Thanks mate

        Comment


          Re: iMac 24 PSU LITEON PA-3241-02A1 250W

          Hi Toasty

          I have been reading through the thread and gaining knowledge on this psu. I think I'm going to replace all the caps. its an imac 24 with the Liteon psu. About three years ago it shut down and began tripping the circuit breaker in the house. I pulled the psu and connected it to the mains power only and tripped the breaker. Last month i tested the transistors and diodes, found them all good. So i ordered a working one on ebay, but tried the psu once more and after all this time, it was working again which was really great, and i canceled my order . it has been working for about a month with light use. Well, last night I got a screen telling me i need to restart, i'm thinking its about to go out of order soon. Would you advise on this?

          Comment


            Re: iMac 24 PSU LITEON PA-3241-02A1 250W

            Welcome!

            Your statement about tripping the house breaker makes me suspicious that there's something wrong with that circuit. The supply would blow its internal fuse long before the house breaker would trip.

            Recapping is a good idea. I would leave out the Mains caps and just stick to the others.

            Just make sure you don't have a motherboard caps problem.

            T
            veritas odium parit

            Comment


              Re: iMac 24 PSU LITEON PA-3241-02A1 250W

              Thank you very much I found these capacitors in post 81 in this thread. Should I only replace these?

              3 - 2200/16 - UCC KY
              1 - 2200/16 - UCC KZH
              2 - 470/50 - MAT FM

              What should I do to investigate the circuit where the fuse don't blow?

              Comment


                Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                I'm talking about a problem with your house electrical circuit, not the power supply.

                Yes, those are my general suggestions for caps for this PSU.

                T
                veritas odium parit

                Comment


                  Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                  Bad inrush NTC could make the breaker trip? Or would that blow the PSU fuse?
                  "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
                  -David VanHorn

                  Comment


                    Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                    There is no inrush NTC on these, but there is an MOV. It's after the fuse (5A) which would certainly blow before the house circuit breaker (15A ?).

                    T
                    veritas odium parit

                    Comment


                      Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                      Yeah house is 20A and actually part of that circuit failed completely. The breaker tested good, but a several wall outlets have no power since.
                      After that I tried another outlet. Seems like the breaker tripped there also, but this is going on three years ago, the PSU was most definate dead.
                      Toasty, I found the UCC caps, but I'm not finding any MATs. Would you point me to them?

                      Comment


                        Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                        MAT = Matsushita(formerly) = Panasonic

                        I use the FM series - EEUFM1H471
                        Another choice would be the FR series - EEUFR1H471

                        Both are 12.5 x 22mm

                        Whichever is least expensive.

                        Who are you sourcing the parts from?

                        Please post the manufacturer's numbers you are ordering for review before ordering.

                        All should be 12.5mm diameter and 20 to 25mm in height.

                        T
                        veritas odium parit

                        Comment


                          Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                          Originally posted by rwing View Post
                          Thank you for the Pin out Sir. Yes the startup section of this psu is burnt. The pin out information you have provided me has now given me the opportunity to test my Logic board and prove that the board is still functional. I have modified an enterprise class power supply to power this logic board. I am typing from this mac logic board retrofit into an ATX Rack Mount Case running Debian 8.0 This system will now take another life with a different function.

                          P.S. any one need an Early 2009 Imac 24in Screen and Glass front cover. 75bucks for Toasty, 100 bucks for any one else.
                          Old I know but maybe rwing or someone can help, I want to do the same, I have a 2008 iMac 24 inch with dead power supply, can you explain how I can power the motherboard with a different power supply and the model/characteristics of the enterprise power supply you used ?

                          Let me know.

                          Thank you.

                          Comment


                            Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                            Why not just fix the one you have? One of the easier ones as no caps are buried under a heatsink.

                            T
                            veritas odium parit

                            Comment


                              Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                              Hi,
                              i have a PA-3241-02a1 liteon power supply from a Imac opened by another tecnician.
                              i see first led green with AC, and when i press power button 2 led become green for a while then turn off....fan move a bit and see a very little smoke from power.
                              I'm not particulary expert what i can check ?
                              1 time power on with all fan moving but no video and no Apple chime sound so i think post doesn't work.

                              Comment


                                Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                                Being inexperienced, I would replace the power supply. Because of the smoke you saw, don't even bother attempting to fix it.

                                The other technician apparently screwed something up.

                                T
                                veritas odium parit

                                Comment


                                  Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                                  i have replaced power supply with a new one.
                                  try to power up and nothing again.....just 1 green led, 2 led power on for a while , 3 and 4 off.

                                  Can be an issue on logical board?what i have to check on it? some fuse , or other components?
                                  initially this imac has an issue on graphic card (some artefacts when too hot for dust , bad thermoconduttive on cpu, never power down) .

                                  No power can be dued i'm trying to turn on without frontal cover?
                                  Please help.
                                  Thanks in advance
                                  Bye
                                  Last edited by twingolover; 11-08-2017, 10:03 AM.

                                  Comment


                                    Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                                    If the cover is on or off will make no difference. It will work.

                                    What is the Apple model number of the iMac?

                                    Here: https://everymac.com/ultimate-mac-lookup/

                                    Can you provide some clear photos from different angles of the logic board and the whole unit from the back?

                                    T
                                    veritas odium parit

                                    Comment


                                      Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                                      Originally posted by Toasty View Post
                                      If the cover is on or off will make no difference. It will work.

                                      What is the Apple model number of the iMac?

                                      Here: https://everymac.com/ultimate-mac-lookup/

                                      Can you provide some clear photos from different angles of the logic board and the whole unit from the back?

                                      T
                                      Thanks for helping me....
                                      here are photos

                                      https://ibb.co/fia87b
                                      https://ibb.co/dohc0w
                                      https://ibb.co/f1BsYG
                                      https://ibb.co/cEWsYG
                                      https://ibb.co/fetvnb
                                      https://ibb.co/hop1Sb
                                      https://ibb.co/nzmRtG

                                      may help reflowing components?

                                      Comment


                                        Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                                        You said: "initially this imac has an issue on graphic card "

                                        Was the graphic card replaced?

                                        You might have to do that. Especially if it overheated.

                                        These problems started with the graphics card, yes?

                                        T
                                        veritas odium parit

                                        Comment


                                          Re: iMac 24 PSU LITEON PA-3241-02A1 250W

                                          Originally posted by Toasty View Post
                                          You said: "initially this imac has an issue on graphic card "

                                          Was the graphic card replaced?

                                          You might have to do that. Especially if it overheated.

                                          These problems started with the graphics card, yes?

                                          T
                                          initially imac have issue with artefacts.
                                          No GPU wasn't replaced
                                          Power make smoke on startup.....so i try to replace it assuming was a power issue.
                                          so only 1 led can be the issue on GPU?

                                          Comment

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