Samsung Syncmaster 225BW

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  • db10
    New Member
    • Dec 2010
    • 3

    #261
    Re: Samsung Syncmaster 225BW

    Is it necessary to replace all the caps, or can I just replace the bulging ones?

    P12386-ND CAP 330UF 25V ELECT FM RADIAL
    P12391-ND CAP 820UF 25V ELECT FM RADIAL

    Also anyone got a recommendation on what other equipment I need like a soldering iron, and solder? Can I make do with something cheap from radioshack?

    Comment

    • EGuevarae
      Badcaps Legend
      • Nov 2008
      • 1336
      • USA

      #262
      Re: Samsung Syncmaster 225BW

      Originally posted by db10
      Is it necessary to replace all the caps, or can I just replace the bulging ones?

      P12386-ND CAP 330UF 25V ELECT FM RADIAL
      P12391-ND CAP 820UF 25V ELECT FM RADIAL

      Also anyone got a recommendation on what other equipment I need like a soldering iron, and solder? Can I make do with something cheap from radioshack?
      Normally, all the caps are of the same lot/series/age, so it is recommended to replace them all (except the big one) to avoid reopening the unit in a near future.
      There are 10 kind of people in this world: those that understand binary, and those who don't.
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        2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job )

      Comment

      • db10
        New Member
        • Dec 2010
        • 3

        #263
        Re: Samsung Syncmaster 225BW

        Originally posted by eguevarae
        Normally, all the caps are of the same lot/series/age, so it is recommended to replace them all (except the big one) to avoid reopening the unit in a near future.
        Thanks so I am going to add these to my order as well:
        P10321-ND
        P12390-ND
        Along with:
        P12386-ND CAP 330UF 25V ELECT FM RADIAL
        P12391-ND CAP 820UF 25V ELECT FM RADIAL

        Comment

        • retiredcaps
          Badcaps Legend
          • Apr 2010
          • 9271

          #264
          Re: Samsung Syncmaster 225BW

          Originally posted by db10
          Is it necessary to replace all the caps, or can I just replace the bulging ones?

          P12386-ND CAP 330UF 25V ELECT FM RADIAL
          P12391-ND CAP 820UF 25V ELECT FM RADIAL

          Can I make do with something cheap from radioshack?
          Most here will recommend all except the biggest one because caps don't have to bulge in order to be bad. The Panasonic FM that you have chosen are good low ESR caps.

          If this is the only monitor you will fix, then you might want to check with friends/family to see if you can borrow their soldering equipment. I personally buy the cheapest ebay soldering iron (40 watts) and don't care if it doesn't last 20 years. I have repaired about 15 monitors with the $4 iron.
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          Comment

          • db10
            New Member
            • Dec 2010
            • 3

            #265
            Re: Samsung Syncmaster 225BW

            Originally posted by retiredcaps
            Most here will recommend all except the biggest one because caps don't have to bulge in order to be bad. The Panasonic FM that you have chosen are good low ESR caps.

            If this is the only monitor you will fix, then you might want to check with friends/family to see if you can borrow their soldering equipment. I personally buy the cheapest ebay soldering iron (40 watts) and don't care if it doesn't last 20 years. I have repaired about 15 monitors with the $4 iron.
            Thanks very helpful forum members . I was all set to order from digikey but the panasonic 680UF cap item is out of stock, another one I see posted is also out 565-1551-ND. Anyone got recommendations on an alternative, can I mix different manufacturers. Like 493-1554-ND or 493-1829-ND?

            1 P12386-ND CAP 330UF 25V ELECT FM RADIAL 0 0.51000 $0.51
            2 P12391-ND CAP 820UF 25V ELECT FM RADIAL 0 0.75000 $1.50
            1 P10321-ND CAP 47UF 50V ELECT FC RADIAL 0 0.34000 $0.34

            2 P12390-ND CAP 680UF 25V ELECT FM RADIA
            This is back order
            Last edited by db10; 12-11-2010, 03:35 PM.

            Comment

            • PlainBill
              Badcaps Legend
              • Feb 2009
              • 7034
              • USA

              #266
              Re: Samsung Syncmaster 225BW

              Originally posted by db10
              Is it necessary to replace all the caps, or can I just replace the bulging ones?

              P12386-ND CAP 330UF 25V ELECT FM RADIAL
              P12391-ND CAP 820UF 25V ELECT FM RADIAL
              It depends on how much you enjoy having your monitor fail. The smart people replace all of the electrolytic caps except the 450 volt one (unless it shows signs of failure). Since you mention Radio Shack, you are probably in the US. If you order from Digikey and specify USPS First Class Mail shipping, a complete set of replacement caps and shipping will cost less than $10.00. In my opinion, it's worth it to have one less thing to worry about.

              Originally posted by db10
              Also anyone got a recommendation on what other equipment I need like a soldering iron, and solder? Can I make do with something cheap from radioshack?
              It depends on your future plans. Radio Shack 64-2802 is adequate for a 1-shot deal. I would buy something better if your plans including this even as a hobby. Also find a dissecting pick, or make one yourself from a small dowel and a needle. After removing the old cap reheat the solder and run the pick through the hole to clear it. Of course, a pair of wire cutters will come in handy.

              PlainBill
              For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

              Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

              Comment

              • retiredcaps
                Badcaps Legend
                • Apr 2010
                • 9271

                #267
                Re: Samsung Syncmaster 225BW

                Originally posted by db10
                Anyone got recommendations on an alternative, can I mix different manufacturers. Like 493-1554-ND or 493-1829-ND?
                Yes, you can mix manufacturers.

                Panasonic FC (P10277-ND) is another potential choice if you want to stay all Panasonic.

                This list shows the highest to lowest ESR

                https://www.badcaps.net/forum/showthread.php?t=2280

                So you want Nichicon HE vs PW. That is, you want the low ESR cap for a SMPS application.
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                Comment

                • smed1065
                  New Member
                  • Aug 2010
                  • 4

                  #268
                  Re: Samsung Syncmaster 225BW

                  Thanks for all the help!

                  Digi-Key is showing all the caps in stock now.

                  Comment

                  • GR3Y5H3ART
                    Senior Member
                    • Jan 2011
                    • 146

                    #269
                    Re: Samsung Syncmaster 225BW

                    well i've replaced the Big three listed via Digi Key and still have the same problem

                    Display will turn on for a second, and then turn off within 5 mins.


                    i've read through most of the posts and if someone can help me with the part numbers to replace the other caps

                    thanks very much

                    Comment

                    • typhonus
                      New Member
                      • Jan 2011
                      • 3

                      #270
                      Re: Samsung Syncmaster 225BW

                      First, a big thanks to PlainBill for all his help. Reading through this thread has expanded my knowledge base and I am grateful.
                      Secondly, found the reference material for the M220z1-L01 monitor for the 22 inch Samsung 225BW while searching for CCFL's. Though it would be useful here.

                      Also, can anyone recommend where to buy, and the part numbers for, the CCFL's? I am in southern California.


                      Thanks again.
                      Attached Files

                      Comment

                      • jetadm123
                        Badcaps Legend
                        • Feb 2010
                        • 2169

                        #271
                        Re: Samsung Syncmaster 225BW

                        Originally posted by typhonus
                        First, a big thanks to PlainBill for all his help. Reading through this thread has expanded my knowledge base and I am grateful.
                        Secondly, found the reference material for the M220z1-L01 monitor for the 22 inch Samsung 225BW while searching for CCFL's. Though it would be useful here.

                        Also, can anyone recommend where to buy, and the part numbers for, the CCFL's? I am in southern California.


                        Thanks again.

                        Members have had good experiences with ccflwarehouse.com. They provide tech support if you can't find what you're looking for.

                        Comment

                        • OneOfEm
                          Member
                          • Jan 2011
                          • 31

                          #272
                          Re: Samsung Syncmaster 225BW

                          I REALLY wish I'd found this forum a week ago!

                          I was given a "dead" Samsung 225BW about a month ago, so I decided to try to repair it. I replaced a set of blown caps on a graphics card successfully about a year and a half ago, so I just dove in.

                          Five CapXon capacitors were visibly bulging: 3 330uf 25v, and 2 820uf 25v. If I'd read this thread early enough I would have replaced the 6th as well (the one by the switch).

                          I used the following Digikey parts: 565-1553-ND and 493-1551-ND (again, I did this "blind" so I might be using sub-par parts?).

                          After replacing these caps, the power won't come on at all. There's no light on the power button and no indication of power at all.

                          I tested the green fuse and it's ok.

                          I know I should replace the small cap, but is there anything else I can do in the meantime to see if there is another problem? Am I going to need to replace any of the new caps that I might have incorrectly used?
                          Attached Files

                          Comment

                          • retiredcaps
                            Badcaps Legend
                            • Apr 2010
                            • 9271

                            #273
                            Re: Samsung Syncmaster 225BW

                            Originally posted by OneOfEm
                            I tested the green fuse and it's ok.

                            I know I should replace the small cap, but is there anything else I can do in the meantime to see if there is another problem?
                            1) What about fuse F101? A good fuse should measure under 1.0ohms.

                            2) The little cap plays an important part of the SMPS startup process.

                            3) Do you measure any secondary voltages on the connector to the logic board?

                            4) Your other questions will be answered after your posted results.
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                            Comment

                            • jetadm123
                              Badcaps Legend
                              • Feb 2010
                              • 2169

                              #274
                              Re: Samsung Syncmaster 225BW

                              Originally posted by OneOfEm
                              I REALLY wish I'd found this forum a week ago!

                              I was given a "dead" Samsung 225BW about a month ago, so I decided to try to repair it. I replaced a set of blown caps on a graphics card successfully about a year and a half ago, so I just dove in.

                              Five CapXon capacitors were visibly bulging: 3 330uf 25v, and 2 820uf 25v. If I'd read this thread early enough I would have replaced the 6th as well (the one by the switch).

                              I used the following Digikey parts: 565-1553-ND and 493-1551-ND (again, I did this "blind" so I might be using sub-par parts?).

                              After replacing these caps, the power won't come on at all. There's no light on the power button and no indication of power at all.

                              I tested the green fuse and it's ok.

                              I know I should replace the small cap, but is there anything else I can do in the meantime to see if there is another problem? Am I going to need to replace any of the new caps that I might have incorrectly used?

                              The "KY" and "HE" series caps you used are low-esr and should be fine. The one cap you should have also replaced is the startup cap circled in red. With power off and monitor unplugged thing test the continuity of the main fuse circled in yellow. If it checks good, then measure the voltage across the main 450V cap. Be careful as you're dealing with high voltage!
                              Attached Files

                              Comment

                              • OneOfEm
                                Member
                                • Jan 2011
                                • 31

                                #275
                                Re: Samsung Syncmaster 225BW

                                Originally posted by jetadm123
                                The "KY" and "HE" series caps you used are low-esr and should be fine. The one cap you should have also replaced is the startup cap circled in red. With power off and monitor unplugged thing test the continuity of the main fuse circled in yellow. If it checks good, then measure the voltage across the main 450V cap. Be careful as you're dealing with high voltage!

                                The main fuse tests good.

                                The voltage across the 450V cap is 220.

                                Comment

                                • OneOfEm
                                  Member
                                  • Jan 2011
                                  • 31

                                  #276
                                  Re: Samsung Syncmaster 225BW

                                  Originally posted by retiredcaps
                                  1)
                                  3) Do you measure any secondary voltages on the connector to the logic board?
                                  I don't have any idea where to start measuring this.

                                  (The fuse tests good.)


                                  You guys can't imagine how great it is to get this advice!

                                  Comment

                                  • jetadm123
                                    Badcaps Legend
                                    • Feb 2010
                                    • 2169

                                    #277
                                    Re: Samsung Syncmaster 225BW

                                    Originally posted by OneOfEm
                                    The main fuse tests good.

                                    The voltage across the 450V cap is 220.
                                    Assuming you're in the USA, the voltage across the 450V cap should be around 160-165VDC. Are you measuring it correctly? Neg probe on "-" lead and Pos probe on "+" lead.

                                    The secondary voltage retiredcaps is talking about is the output of the device mounted on the heatsink on the left side of your photo. Use a mounting screw for your neg probe and place your pos probe on the middle leg of the device to measure voltage output.

                                    Comment

                                    • OneOfEm
                                      Member
                                      • Jan 2011
                                      • 31

                                      #278
                                      Re: Samsung Syncmaster 225BW

                                      Originally posted by jetadm123
                                      Assuming you're in the USA, the voltage across the 450V cap should be around 160-165VDC. Are you measuring it correctly? Neg probe on "-" lead and Pos probe on "+" lead.
                                      Yeah, thats how I tested...

                                      The secondary voltage retiredcaps is talking about is the output of the device mounted on the heatsink on the left side of your photo. Use a mounting screw for your neg probe and place your pos probe on the middle leg of the device to measure voltage output.
                                      This fluctuates from 5mV to 70mV or so, randomly.

                                      Comment

                                      • OneOfEm
                                        Member
                                        • Jan 2011
                                        • 31

                                        #279
                                        Re: Samsung Syncmaster 225BW

                                        ***Solved***

                                        Sometimes you have to start at the beginning...

                                        A tiny wire in the four-wire connection between the button panel and the controller had a short at the connector.

                                        It looked as if the bezel had been opened before, so whoever did it probably pulled the wire to disconnect it, causing a faulty connection. When I removed the connection I caused the short to open.

                                        Those things are TINY!

                                        Thank you so much for the quick replies!!!

                                        Comment

                                        • LHC
                                          New Member
                                          • Jan 2011
                                          • 1

                                          #280
                                          Re: Samsung Syncmaster 225BW

                                          Hello people, I wonder if anyone can help. I've replaced the caps and it still isn't working. I'm fairly sure the problem is the integrated circuit, but I can't work out what part I need to replace it with. I can't make out any of the text on it.

                                          Does anybody have an idea what I need?

                                          Sorry this is so vague - I'd be happy to try provide more detail if you could tell me what you need.

                                          Cheers

                                          Comment

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