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    #21
    Re: Sharp LCD

    Originally posted by Menessis View Post
    Check for "gammy"? Do you mean "Gummy" ? Dried up grease? on the heat sink?

    Menessis
    Yes, sorry for the wrong spelling.
    I have saw the heat transfer pad dried up on Sharp tv before.

    Also get a can of freeze, this can help diagnose and locate where is your heat problem.

    Comment

      #22
      Re: Sharp LCD

      Originally posted by fastvideo View Post
      Also get a can of freeze, this can help diagnose and locate where is your heat problem.
      Good suggestion. If heatsink is removed, please post pics so we can see what it looks like.
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        #23
        Re: Sharp LCD

        I tried using the hair dryer when the tv is cold and warming up different areas to see if there is a difference. LOL. How do you use the "freeze"?

        Menessis

        Comment

          #24
          Re: Sharp LCD

          OK here is a shot of the heat sheild removed. The grease wasn't dried up. Didn't find any nasty looking solder joints either.

          New caps I think is the next step??



          Menessis
          Attached Files

          Comment

            #25
            Re: Sharp LCD

            Update. I just put it back together enought to turn it on. I used the hair dryer on the caps in the psu for maybe 20 to 30 seconds and tried it. I did this about 5 or 6 times and walla! It works. So it would seem to me that the problem is indeed the caps.

            Menessis

            Comment

              #26
              Re: Sharp LCD

              Originally posted by Menessis View Post
              Update. I just put it back together enought to turn it on. I used the hair dryer on the caps in the psu for maybe 20 to 30 seconds and tried it. I did this about 5 or 6 times and walla! It works. So it would seem to me that the problem is indeed the caps.

              Menessis
              1. That's a good sign. If you want a better verification, rig a shield over the caps so you are heating the surrounding components, but not the caps. If it now DOESN'T respond to the hair dryer, you have proven it's the caps.

              2. That's spelled voila! http://www.answers.com/topic/walla Although in this case, eureka (used to express triumph on a discovery) might be more appropriate.

              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

                #27
                Re: Sharp LCD

                Good idea....I'll try that tomorrow.

                Menessis

                Comment

                  #28
                  Re: Sharp LCD

                  ok so now I can't find the two 330uf 220vlt caps anywhere!

                  Menessis

                  Comment

                    #29
                    Re: Sharp LCD

                    Originally posted by Menessis View Post
                    ok so now I can't find the two 330uf 220vlt caps anywhere!
                    Mouser carries a Nichicon 330uF 220V cap. I don't know if it is the correct dimensions though. Digikey has nothing with qty = 2 (minimum is 200). If the Nichicon is the wrong dimension, then list the dimensions of the existing UCC cap and we can go up in voltage while keeping the 330uF.

                    All the other KY caps can EASILY be replaced with Panasonic FM caps. The FM caps exceed the esr and ripple of the KY caps.

                    KY datasheet at



                    FM datasheet at



                    I compared 2 for fun.

                    1000uF 25V - KY 0.031 ohms 1910 ripple
                    220uF 35V - KY 0.080 ohms 865 ripple

                    1000uF 25V - FM 0.018 ohms 2600 ripple
                    220uF 35V - FM 0.038 ohms 1290 ripple

                    Good job with the hair dryer to narrow down the problem.
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                    Comment

                      #30
                      Re: Sharp LCD

                      Originally posted by retiredcaps View Post
                      Mouser carries a Nichicon 330uF 220V cap. I don't know if it is the correct dimensions though. Digikey has nothing with qty = 2 (minimum is 200). If the Nichicon is the wrong dimension, then list the dimensions of the existing UCC cap and we can go up in voltage while keeping the 330uF.

                      All the other KY caps can EASILY be replaced with Panasonic FM caps. The FM caps exceed the esr and ripple of the KY caps.

                      KY datasheet at



                      FM datasheet at



                      I compared 2 for fun.

                      1000uF 25V - KY 0.031 ohms 1910 ripple
                      220uF 35V - KY 0.080 ohms 865 ripple

                      1000uF 25V - FM 0.018 ohms 2600 ripple
                      220uF 35V - FM 0.038 ohms 1290 ripple

                      Good job with the hair dryer to narrow down the problem.
                      KY has a better life time 7000hrs.

                      Comment

                        #31
                        Re: Sharp LCD

                        Originally posted by fastvideo View Post
                        KY has a better life time 7000hrs.
                        Digikey says KY has 10,000 hours.

                        The new Panasonic FR series (equivalent to the FM) has 10,000 hours and it looks like it is finally in stock at digikey, but "on order" at mouser.

                        So instead of ordering FM, go for the FR.
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                          #32
                          Re: Sharp LCD

                          Originally posted by Menessis View Post
                          I used the hair dryer on the caps in the psu for maybe 20 to 30 seconds and tried it.
                          Were these the "all in one row" caps in the left hand corner? Or somewhere else?
                          Last edited by retiredcaps; 01-01-2011, 12:39 PM.
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                            #33
                            Re: Sharp LCD

                            No the 330uf, 220 v are the two big ones on there side in the middle of the psu.

                            I looked on DigiKey the other night and didn't see them there. Must have been tired!

                            OK I just looked again. Selected FR series with the filter. Then it shows up to 50v and that's it.

                            OK what about these KXG's


                            Menessis
                            Last edited by Menessis; 01-01-2011, 03:10 PM.

                            Comment

                              #34
                              Re: Sharp LCD

                              Originally posted by Menessis View Post
                              No the 330uf, 220 v are the two big ones on there side in the middle of the psu.

                              I looked on DigiKey the other night and didn't see them there. Must have been tired!

                              OK I just looked again. Selected FR series with the filter. Then it shows up to 50v and that's it.

                              OK what about these KXG's


                              Menessis
                              220V sounds like it is on the line side of the PSU. No need for low ESR caps there. Of course, without a picture....

                              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

                                #35
                                Re: Sharp LCD

                                Post #8 the middle picture shows the two caps on there side. Your probably right Bill. So the KXG's I found are OK then you think?

                                Menessis

                                Comment

                                  #36
                                  Re: Sharp LCD

                                  Originally posted by Menessis View Post
                                  Post #8 the middle picture shows the two caps on there side. Your probably right Bill. So the KXG's I found are OK then you think?

                                  Menessis
                                  KX is good for the two and that is the same type on the board.
                                  It is very very rare the line filter cap to cause this type of problem, but I have saw the one with the yellow circle instead.
                                  Attached Files

                                  Comment

                                    #37
                                    Re: Sharp LCD

                                    Those ones you circled are all KY's except the one to the right. All I can see on that is CS (M), it's 33uf and 350v.

                                    Menessis

                                    Comment

                                      #38
                                      Re: Sharp LCD

                                      Ok I can't find anything that fits the two big ones. 330uf 220v The only ones I can find so far are general purpose 1000 hr.
                                      Since these are the "hi" side, could I leave them in?

                                      Menessis
                                      Last edited by Menessis; 01-02-2011, 02:21 PM.

                                      Comment

                                        #39
                                        Re: Sharp LCD

                                        Well this is my list so far:

                                        1 3 565-1613-ND CAP 680UF 50V ELECT KY RAD 0 1.03000 $3.09
                                        2 4 565-1555-ND CAP 1000UF 25V ELECT KY RAD 0 0.74000 $2.96
                                        3 1 565-1601-ND CAP 100UF 50V ELECT KY RAD 0 0.44000 $0.44
                                        4 1 565-1575-ND CAP 330UF 35V ELECT KY RAD 0 0.50000 $0.50
                                        5 1 565-1464-ND CAP 33UF 400V ELECT KXG RAD 0 1.72000 $1.72
                                        6 6 565-1573-ND CAP 220UF 35V ELECT KY RAD 0 0.50000 $3.00
                                        7 2 P12927-ND CAP ELECT 22UF 50V FM RADIAL 0 0.34000 $0.68

                                        Still have not found the two 330uf 220v better than 1000 hours.

                                        Menessis

                                        Comment

                                          #40
                                          Re: Sharp LCD

                                          Originally posted by Menessis View Post
                                          Well this is my list so far:
                                          I'm a bit confused here.

                                          1) Which caps are "bad" when heated up? The answer seemed to be the two main filter capacitors. Is that correct?

                                          2) I honestly don't care which brand and series of capacitors is chosen, but if you are going to replace all the KY caps, why replace them with new KY? If they are bad or suspect, why not another manufacturer like Panasonic FR series which has equivalent or better ratings?

                                          3) I also understand the requirement to match the original cap specs as close as possible.
                                          Last edited by retiredcaps; 01-02-2011, 09:34 PM.
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