ViewSonic N3760w LCD with bad caps

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  • oreo1
    Member
    • Oct 2009
    • 27

    #1

    ViewSonic N3760w LCD with bad caps

    The power supply on this ViewSonic TV appears to have some bad caps. When trying to turn the TV on I get nothing. There are 4 Capxon caps with swollen tops that appear bad, but I would like to change them all. I have dealt with Digikey before but would like to know if the site sells an equivalent replacement and what the shipping options would be. Below is a list of what I would like to replace. If someone would be kind enough to give me their opinion as to what they would recommend to use for replacement, I would greatly appreciate it!

    All are Capxon caps:

    Qty-3 680uf 25v KF105°c C618 vent

    Oty-2 1500uf 16v KF105°c C618 vent

    Oty-2 220uf 25v KF105°c C616 vent


    Thank you very much in advance for any assistance you might be able to provide.
    Attached Files
  • retiredcaps
    Badcaps Legend
    • Apr 2010
    • 9271

    #2
    Re: ViewSonic N3760w LCD with bad caps

    If you are going to recap them "all", I count 16 caps on the entire board. Please provide the dimensions of all the caps because 3 or 4 them might be a tight fit side by side. Also, you don't want caps that are too tall and then you can't put the shield back on them.

    Mouser.com, Badcaps.net are 2 other options.

    Panasonic, Rubycon, and United Chemi-con are the ones recommended most be forum members.

    Originally posted by oreo1
    There are 4 Capxon caps with swollen tops that appear bad, but I would like to change them all. I have dealt with Digikey before but would like to know if the site sells an equivalent replacement and what the shipping options would be.

    All are Capxon caps:

    Qty-3 680uf 25v KF105°c C618 vent

    Oty-2 1500uf 16v KF105°c C618 vent

    Oty-2 220uf 25v KF105°c C616 vent
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    Comment

    • lucky13
      Badcaps Veteran
      • Aug 2007
      • 412

      #3
      Re: ViewSonic N3760w LCD with bad caps

      You only need to replace all the Crapxon capacitors in the secondary side. There are 11 total. I would use Panasonic FM caps from Digikey.

      Just watch the height and the diameter (typically 10mm for the larger ones).

      Comment

      • oreo1
        Member
        • Oct 2009
        • 27

        #4
        Re: ViewSonic N3760w LCD with bad caps

        Sorry,
        Forgot to give the sizes. Lucky13, I am going to replace the Capxon caps for now and here are the sizes:

        Qty-3 680uf 25v KF105°c C618 vent Size: 10mm round, 21mm high

        Oty-2 1500uf 16v KF105°c C618 vent Size: 10mm round, 21mm high

        Oty-2 220uf 25v KF105°c C616 vent Size: 8mm round, 12mm high

        Comment

        • robert
          Senior Member
          • Jan 2008
          • 69

          #5
          Re: ViewSonic N3760w LCD with bad caps

          Also replace all (i count 5) small capacitors on the primary side.
          These often dry up as well and cause startup problems in the future, plus its not much work to replace.

          Capxon KF can be replaced with United Chemi-Con KY or LXY series, Rubycon ZL, ZLH, Nichicon PW, Panasonic FC, FK or FM series.

          What type is the large blue capacitor? If its Capxon, i usually replace it too, had enough faulty ones by now.
          Last edited by robert; 06-13-2010, 11:10 AM.

          Comment

          • disposable001
            New Member
            • Jul 2010
            • 1

            #6
            Re: ViewSonic N3760w LCD with bad caps

            Any chance someone could just post some suitable Digikey part numbers for oreo's list? I have c21 and c22 bulging on mine, and it won't switch on. May as well replace all the electrolytic caps on the secondary as long as I'm doing the two. My problem is that I'm having trouble choosing appropriate replacements from all the options.

            Thanks!

            Comment

            • retiredcaps
              Badcaps Legend
              • Apr 2010
              • 9271

              #7
              Re: ViewSonic N3760w LCD with bad caps

              Originally posted by disposable001
              My problem is that I'm having trouble choosing appropriate replacements from all the options.
              It is safest to list what you have for caps in uF, V, and size. There is a possibility that the caps are not the same due to board revision changes.

              You don't want to get a cap, install it, and then find out you can't get the shield back on because the cap was too fat or tall.

              If you are going to order from Digikey, you probably want the Panasonic FM series for caps.
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              Comment

              • oreo1
                Member
                • Oct 2009
                • 27

                #8
                Re: ViewSonic N3760w LCD with bad caps

                Originally posted by disposable001
                Any chance someone could just post some suitable Digikey part numbers for oreo's list? I have c21 and c22 bulging on mine, and it won't switch on. May as well replace all the electrolytic caps on the secondary as long as I'm doing the two. My problem is that I'm having trouble choosing appropriate replacements from all the options.

                Thanks!
                If someone could post a list it would be very helpful for both of us.
                Thank you very much!!

                Comment

                • Akaister
                  Member
                  • May 2009
                  • 22

                  #9
                  Re: ViewSonic N3760w LCD with bad caps

                  I went to Digi-Key and typed in Panasonic FM, just pick your uf, voltage and match your sizes. It couldn't be easier, dig in. The Panasonic FM is a good pick.
                  I bought 9 caps and 4 mosfets for around $8.00. They don't have a minimum purchase charge and they shipped them to me asap.

                  Comment

                  • oreo1
                    Member
                    • Oct 2009
                    • 27

                    #10
                    Re: ViewSonic N3760w LCD with bad caps

                    Akeister,
                    Thanks for the reply.....that almost sounds to easy and good to be true!! I'm going home from work in another 5 minutes and give it a try and then order these up. If all goes according to plan I should have this bad boy up and running by the middle of next week. I'll get back to ya once I'm watching some baseball on it!!

                    Many thanks to all that helped out!!

                    Comment

                    • TXPilot69
                      New Member
                      • Sep 2010
                      • 3

                      #11
                      Re: ViewSonic N3760w LCD with bad caps

                      Originally posted by Akaister
                      I went to Digi-Key and typed in Panasonic FM, just pick your uf, voltage and match your sizes. It couldn't be easier, dig in. The Panasonic FM is a good pick.
                      I bought 9 caps and 4 mosfets for around $8.00. They don't have a minimum purchase charge and they shipped them to me asap.
                      I'm dealing with this same issue on my N3760W, symptom wise. I haven't opened it up yet to see what the board looks like, but am glad to have found this helpful thread.

                      DigiKey's part selector seems pretty straightforward, but also has selection parameters for ripple current, impedance, and lead spacing. I can determine lead spacing once I get the board out and measure, but how do I pick the correct replacement parameters for those other values?

                      Also, I presume (since they're all 105C temp capacitors) that I'm best off buying the 7000hr vs any lower value? [EDIT: 5000 hr; they don't have 7000 hr for the Panasonic FMs]

                      http://search.digikey.com/scripts/Dk...panasonic%20fm

                      Thanks,

                      TX Pilot

                      Comment

                      • TXPilot69
                        New Member
                        • Sep 2010
                        • 3

                        #12
                        Re: ViewSonic N3760w LCD with bad caps

                        Originally posted by oreo1
                        Akeister,
                        Thanks for the reply.....that almost sounds to easy and good to be true!! I'm going home from work in another 5 minutes and give it a try and then order these up. If all goes according to plan I should have this bad boy up and running by the middle of next week. I'll get back to ya once I'm watching some baseball on it!!

                        Many thanks to all that helped out!!
                        Oreo, how'd this repair work out for you?

                        Comment

                        • TXPilot69
                          New Member
                          • Sep 2010
                          • 3

                          #13
                          Re: ViewSonic N3760w LCD with bad caps

                          Originally posted by TXPilot69
                          I'm dealing with this same issue on my N3760W, symptom wise. I haven't opened it up yet to see what the board looks like, but am glad to have found this helpful thread.

                          DigiKey's part selector seems pretty straightforward, but also has selection parameters for ripple current, impedance, and lead spacing. I can determine lead spacing once I get the board out and measure, but how do I pick the correct replacement parameters for those other values?

                          Also, I presume (since they're all 105C temp capacitors) that I'm best off buying the 7000hr vs any lower value? [EDIT: 5000 hr; they don't have 7000 hr for the Panasonic FMs]

                          http://search.digikey.com/scripts/Dk...panasonic%20fm

                          Thanks,

                          TX Pilot
                          I think I got this all figured out, seeing as there are only one set of ripple current and lead spacing choices, it looks like the correct set of items are:

                          Qty-3 680uf 25v KF105°c C618 vent Size: 10mm round, 21mm high
                          http://search.digikey.com/scripts/Dk...name=P12390-ND
                          0.67 ea.

                          Oty-2 1500uf 16v KF105°c C618 vent Size: 10mm round, 21mm high
                          http://search.digikey.com/scripts/Dk...name=P12368-ND
                          0.85 each

                          Oty-2 220uf 25v KF105°c C616 vent Size: 8mm round, 12mm high
                          http://search.digikey.com/scripts/Dk...name=P12383-ND
                          0.45 ea.

                          Comment

                          • retiredcaps
                            Badcaps Legend
                            • Apr 2010
                            • 9271

                            #14
                            Re: ViewSonic N3760w LCD with bad caps

                            Originally posted by TXPilot69
                            DigiKey's part selector seems pretty straightforward, but also has selection parameters for ripple current, impedance, and lead spacing. I can determine lead spacing once I get the board out and measure, but how do I pick the correct replacement parameters for those other values?

                            Also, I presume (since they're all 105C temp capacitors) that I'm best off buying the 7000hr vs any lower value? [EDIT: 5000 hr; they don't have 7000 hr for the Panasonic FMs]
                            First question is answered by PCBONEZ at

                            https://www.badcaps.net/forum/showpo...47&postcount=3

                            Second question regarding hours is related to heat. See posts #7 and #8 at

                            https://www.badcaps.net/forum/showth...light=10C+heat
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                            We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

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                            Comment

                            • mikeli
                              New Member
                              • Nov 2010
                              • 1

                              #15
                              Re: ViewSonic N3760w LCD with bad caps

                              Can someone tell me which capacitors are in C21 and C22. Thanks

                              Comment

                              • oobbyb
                                New Member
                                • Nov 2010
                                • 1

                                #16
                                Re: ViewSonic N3760w LCD with bad caps

                                Originally posted by oreo1
                                The power supply on this ViewSonic TV appears to have some bad caps. When trying to turn the TV on I get nothing. There are 4 Capxon caps with swollen tops that appear bad, but I would like to change them all. I have dealt with Digikey before but would like to know if the site sells an equivalent replacement and what the shipping options would be. Below is a list of what I would like to replace. If someone would be kind enough to give me their opinion as to what they would recommend to use for replacement, I would greatly appreciate it!

                                All are Capxon caps:

                                Qty-3 680uf 25v KF105°c C618 vent

                                Oty-2 1500uf 16v KF105°c C618 vent

                                Oty-2 220uf 25v KF105°c C616 vent


                                Thank you very much in advance for any assistance you might be able to provide.

                                Swapped out the 3) 680uF and 2) 1500uf caps and it works like a champ. I haven't soldered in 25 years and didn't know if I could pull it off, but soldering this board was a breeze. I hope I can get another 5 years out of this monitor.

                                Bob

                                Comment

                                • ajcfactor
                                  New Member
                                  • Oct 2012
                                  • 1
                                  • USA

                                  #17
                                  Re: ViewSonic N3760w LCD with bad caps

                                  This thread is still helping people. I just saved my TV by replacing the 7 caps listed by TXPilot69. Had a heck of a time melting the solder to remove the old ones, but soldering in the new ones was a snap. Thanks.

                                  Comment

                                  • W4LGC
                                    New Member
                                    • May 2012
                                    • 4
                                    • USA

                                    #18
                                    Re: ViewSonic N3760w LCD with bad caps

                                    Last week I ordered the list of seven capacitors as listed by TXpilot69, and installed them on Saturday. Now the TV comes on immediately after hitting the power button, just as it did when it was new. I'm my wife's hero, again. Thanks for your help solving what was an aggravating problem.
                                    Gary Cook

                                    Comment

                                    • michaelssm
                                      New Member
                                      • Apr 2013
                                      • 1
                                      • USA

                                      #19
                                      Re: ViewSonic N3760w LCD with bad caps

                                      Originally posted by mikeli
                                      Can someone tell me which capacitors are in C21 and C22. Thanks
                                      1500uf at 16 volt: nod:

                                      Comment

                                      • madman604
                                        New Member
                                        • May 2013
                                        • 3
                                        • Canada

                                        #20
                                        Re: ViewSonic N3760w LCD with bad caps

                                        My TV has started turning on and off by itself. Power supply shows nothing odd. Caps all look normal. Can this weirdness be caused by the PSU or am I looking in the wrong place?

                                        The main board also looks fine.

                                        Should I try try replacing the 7 caps listed anyways?

                                        Thanks.

                                        Comment

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