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    #1

    The KING

    Here is the KING, and I don't mean Elvis Presley! First thing to notice is that the brand sticker has been replaced. Residue from the old sticker is still present. I have no idea who the OEM is. This is a half bridge design. The fan was stuck. Every capacitor in the output circuits was bulging. So I replaced them all with some pullouts from my collection, increasing values a little. The main input capacitors were 330 uF/200 volts and were replaced with pull out 470 uF/200 volts. It did have pi output filters on the 5 volt rail and 3.3 volt rail. Single capacitor 1000 uF/16 volts on the 12 volt rail which I increased to 2200 uF/16 volts. The TO-220 output diodes on the 3.3 volt rail and 5 volt rail were replaced with shottky 30 amp 45 volt pullouts. The F12C20 output diode on the 12 volt rail was replaced with F16C20.

    On initial test, only a fan twitch. Found that the output diode on the 5 volt rail had one side shorted. That is why I "improved" the output diode arrangement.

    Second test with no load, the power supply came up running fine.

    For third test, I removed my I-Micro 400 watt power supply from my Pentium 3 test board (the I-Micro that blew up when tested with a Pentium 4 board). I installed the KING and powered up. NOTHING - just a black screen on the monitor. At least the CPU fan and power supply fans were running. A real disappointment considering that the I-Micro would at least power a Pentium 3 board.

    Here are some pictures of the KING with all repairs made.
    Attached Files
    Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)
    Tags: None
    #2
    Re: The KING

    Any chance some of the tiny JEEs are bad? Unless those didn't come with the unit. If the one driving the BJTs go, bad they can increase the switching losses of the BJTs, for one thing.

    Comment

      #3
      Re: The KING

      For a cheap power supply I am surprised by the populated input protection, ceramic fuse and the use of headers for the power and fans.

      Did you check your voltages when powering the P3 board? Could it just be one rail sagging under load that affects the video chip set?

      Comment

        #4
        Re: The KING

        That looks maybe like a very old FSP design.
        "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

        -Leonid Brezhnev (On the Yom Kippur War)

        Comment

          #5
          Re: The KING

          Originally posted by everell View Post
          For third test, I removed my I-Micro 400 watt power supply from my Pentium 3 test board (the I-Micro that blew up when tested with a Pentium 4 board). I installed the KING and powered up. NOTHING - just a black screen on the monitor. At least the CPU fan and power supply fans were running. A real disappointment considering that the I-Micro would at least power a Pentium 3 board.
          I bet PG is staying low, keeping the mobo in reset. Change those small caps near the '494 and power good ckt (near those transistors and gray wire).

          Also change any non-Jap caps on the secondary outputs.

          Attached Files
          "pokemon go... to hell!"

          EOL it...
          Originally posted by shango066
          All style and no substance.
          Originally posted by smashstuff30
          guilty,guilty,guilty,guilty!
          guilty of being cheap-made!

          Comment

            #6
            Re: The KING

            Originally posted by mockingbird View Post
            That looks maybe like a very old FSP design.
            I don't know if it is FSP, but it is a very old design. Supervisory circuitry is all transistors, not the usual 339 integrated circuit. Date on the QC sticker is April 2003.
            Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)

            Comment

              #7
              Re: The KING

              Originally posted by kaboom View Post
              I bet PG is staying low, keeping the mobo in reset. Change those small caps near the '494 and power good ckt (near those transistors and gray wire).

              Also change any non-Jap caps on the secondary outputs.

              You are correct......PG out is staying low. Looks like I have a lot of small capacitors to replace. This was supposed to be a KING, not a nuisance.
              Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)

              Comment

                #8
                Re: The KING

                Originally posted by everell View Post
                You are correct......PG out is staying low. Looks like I have a lot of small capacitors to replace. This was supposed to be a KING, not a nuisance.
                Hey, at least it's not thecapking!!!

                "pokemon go... to hell!"

                EOL it...
                Originally posted by shango066
                All style and no substance.
                Originally posted by smashstuff30
                guilty,guilty,guilty,guilty!
                guilty of being cheap-made!

                Comment

                  #9
                  Re: The KING

                  Actually,it's not a old FSP.

                  The OEM's Sun Pro. I don't know how you all didn't notice the KY-400ATX model number,specific for Sun Pro PSUs. Also the logo is very similar to Sun Pro's logo.
                  Last edited by Dan81; 08-26-2015, 12:26 AM.
                  Main rig:
                  Gigabyte B75M-D3H
                  Core i5-3470 3.60GHz
                  Gigabyte Geforce GTX650 1GB GDDR5
                  16GB DDR3-1600
                  Samsung SH-224AB DVD-RW
                  FSP Bluestorm II 500W (recapped)
                  120GB ADATA + 2x Seagate Barracuda ES.2 ST31000340NS 1TB
                  Delux MG760 case

                  Comment

                    #10
                    Re: The KING

                    Originally posted by Dan81 View Post
                    Actually,it's not a old FSP.

                    The OEM's Sun Pro. I don't know how you all didn't notice the KY-400ATX model number,specific for Sun Pro PSUs. Also the logo is very similar to Sun Pro's logo.
                    Correct!

                    Not only that, but the UL number, E210743, also matches what I have for a Sun-Pro built RaidMax RX-380K PSU.

                    Actually, here's a post I made on mine:
                    https://www.badcaps.net/forum/showpo...&postcount=883
                    Notice how similar the PCB designs are. Except yours has much more "beefier" parts and a mag-amp circuit for the 3.3V rail, whereas mine has a MOSFET and 3.3V rail is linearly regulated.

                    I deem that to be one of the worst PSUs I have (or maybe a close second after my JNC LC-235ATX). If you put better heatsinks in yours, it might be somewhat more use-able. The output toroid inductor actually looks of decent size. I guess this is as good and complete as this model gets. Like LDSisHere, I too am surprised to see connectors and a ceramic fuse. It's almost an OK PSU, actually ... well, almost .
                    Last edited by momaka; 08-26-2015, 01:05 PM.

                    Comment

                      #11
                      Re: The KING

                      King Yes? It should be called King No....

                      Must be some fault in the power good circuit, might not even be capacitors.
                      "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
                      -David VanHorn

                      Comment

                        #12
                        Re: The KING

                        Originally posted by Dan81 View Post
                        Actually,it's not a old FSP.

                        The OEM's Sun Pro. I don't know how you all didn't notice the KY-400ATX model number,specific for Sun Pro PSUs. Also the logo is very similar to Sun Pro's logo.
                        Model KY-400ATX.........does that mean this is supposed to be a 400 watt power supply.........sorta like the IMicro 400 watt power supplies?????
                        Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)

                        Comment

                          #13
                          Re: The KING

                          Originally posted by everell View Post
                          Model KY-400ATX.........does that mean this is supposed to be a 400 watt power supply.........sorta like the IMicro 400 watt power supplies?????
                          Only on the sticker...

                          I'd say 150-175W with those stupid "T" heatsinks. Look at how little cross section there is behind/above the devices- how can that possibly conduct the heat well to the "top hat" where the holes are?
                          Last edited by kaboom; 08-26-2015, 07:36 PM.
                          "pokemon go... to hell!"

                          EOL it...
                          Originally posted by shango066
                          All style and no substance.
                          Originally posted by smashstuff30
                          guilty,guilty,guilty,guilty!
                          guilty of being cheap-made!

                          Comment

                            #14
                            Re: The KING

                            Originally posted by kaboom View Post
                            I'd say 150-175W with those stupid "T" heatsinks. Look at how little cross section there is behind/above the devices- how can that possibly conduct the heat well to the "top hat" where the holes are?
                            Ah, but you see, diodes and rectifiers have a lower Vf at higher temperatures . Thus the PSU achieves higher efficiency .

                            On that note, all I have to say is, the Raidmax RX-380K that I pointed to in my above post was still very inefficient. It was used in a family friend's PC that drew maybe only 100W at the most (s462 AMD Athlon XP 2000+, GeForce FX5200, and one or two HDDs). This PSU always ran very hot and blew a lot of hot air, despite its fan being wired straight to 12V. So yeah, even with hot rectifiers, it was still miserably inefficient. You can see how "well-done" the PCB looks on my unit.

                            Everell, I sure hope the efficiency of your's isn't as terrible as that.
                            Last edited by momaka; 08-27-2015, 01:57 AM.

                            Comment

                              #15
                              Re: The KING

                              Originally posted by momaka View Post
                              Ah, but you see, diodes and rectifiers have a lower Vf at higher temperatures . Thus the PSU achieves higher efficiency
                              "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
                              -David VanHorn

                              Comment

                                #16
                                Re: The KING

                                kaboom, you are correct. I replaced eight small JEE capacitors in the area you indicated. The PG_out signal is now good. The KING will now power my Pentium 3 test motherboard just as good as the IMicro.
                                Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)

                                Comment

                                  #17
                                  Re: The KING

                                  Originally posted by everell View Post
                                  kaboom, you are correct. I replaced eight small JEE capacitors in the area you indicated. The PG_out signal is now good. The KING will now power my Pentium 3 test motherboard just as good as the IMicro.
                                  I'd be against trying it with a Pentium 4,considering how one of your IMicros (I see you had/have 3 of them) went off with a bang on a Pentium 4:

                                  Originally posted by everell
                                  With boldness, I attached it to a Pentium 4 class motherboard. Pushed PS_on switch.....BANG, fizz, and a small fireball! Both switching transistors shorted, the C945 driver transistors were bad, and the 7500 pwm chip was shorted. Also a couple of bad diodes, and the resistors in one of the switchers had blown resistors. I replaced the switching transistors with 13007. I also replaced the two electrolytic capacitors in the switching transistor circuits. Replaced the driver transformer just in case it shorted. Attached it to the Pentium 3 motherboard and once again it came to life.
                                  I still remember how my Sun Pro built Delux died...
                                  Main rig:
                                  Gigabyte B75M-D3H
                                  Core i5-3470 3.60GHz
                                  Gigabyte Geforce GTX650 1GB GDDR5
                                  16GB DDR3-1600
                                  Samsung SH-224AB DVD-RW
                                  FSP Bluestorm II 500W (recapped)
                                  120GB ADATA + 2x Seagate Barracuda ES.2 ST31000340NS 1TB
                                  Delux MG760 case

                                  Comment

                                    #18
                                    Re: The KING

                                    Originally posted by everell
                                    kaboom, you are correct. I replaced eight small JEE capacitors in the area you indicated. The PG_out signal is now good. The KING will now power my Pentium 3 test motherboard just as good as the IMicro.
                                    Wow, for that circuit not to work, that means those JEE caps really must have gone high ESR. I guess JEE really is that terrible .

                                    Originally posted by Dan81 View Post
                                    I still remember how my Sun Pro built Delux died...
                                    Was it something along the lines of...

                                    Press power button...
                                    Everything seems to be working?

                                    OK, time to do some computing!
                                    Then, all of a sudden...
                                    Last edited by momaka; 08-28-2015, 06:31 AM.

                                    Comment

                                      #19
                                      Re: The KING

                                      Originally posted by momaka View Post
                                      Was it something along the lines of...

                                      Press power button...
                                      Everything seems to be working?

                                      OK, time to do some computing!
                                      Then, all of a sudden...
                                      Nope. I was recapping it,then I assembled it together,and as soon as I flipped the power switch on it,it started fizzing and popping,and then it died.
                                      Main rig:
                                      Gigabyte B75M-D3H
                                      Core i5-3470 3.60GHz
                                      Gigabyte Geforce GTX650 1GB GDDR5
                                      16GB DDR3-1600
                                      Samsung SH-224AB DVD-RW
                                      FSP Bluestorm II 500W (recapped)
                                      120GB ADATA + 2x Seagate Barracuda ES.2 ST31000340NS 1TB
                                      Delux MG760 case

                                      Comment

                                        #20
                                        Re: The KING

                                        Was it powering a Pentium 3 or Pentium 4 type motherboard?
                                        Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)

                                        Comment

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