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    #21
    Re: Old git need help Goodmans LCD TV dead ..

    Hi - Guess you are in UK? As Goodmans common here.

    Is This What your looking for
    http://www2.cricklewoodelectronics.c...roductid=21108

    Looks like £5 plus vat Inc Postage or you can collect if you know
    anyone near cricklewood. I live near a CPC but they dont seem to stock them - cant see them at maplins either
    Or there is this one on ebay (if you can wait for it) http://www.ebay.co.uk/itm/NCP1200-NC...item415961bca3
    Last edited by selldoor; 11-11-2011, 09:18 AM. Reason: adding ebay
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

    Comment

      #22
      Re: Old git need help Goodmans LCD TV dead ..

      Cheers for the links, I had completely forgotten about Cricklewood, I used to get stuff from them , must be 25 years back !! in my Hifi building days.

      Got a couple of IC's and some fuses on order.

      thanks

      Chris


      Originally posted by selldoor View Post
      Hi - Guess you are in UK? As Goodmans common here.

      Is This What your looking for
      http://www2.cricklewoodelectronics.c...roductid=21108

      Looks like £5 plus vat Inc Postage or you can collect if you know
      anyone near cricklewood. I live near a CPC but they dont seem to stock them - cant see them at maplins either
      Or there is this one on ebay (if you can wait for it) http://www.ebay.co.uk/itm/NCP1200-NC...item415961bca3

      Comment

        #23
        Re: Old git need help Goodmans LCD TV dead ..

        Originally posted by ceedy View Post
        Got a couple of IC's and some fuses on order.
        Don't forget the caps. Capxon is about the worse brand of capacitors there is in the lcd world.
        --- begin sig file ---

        If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

        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

          #24
          Re: Old git need help Goodmans LCD TV dead ..

          finally got all the Caps odds sizes for most shops round here..

          But all recapped . new IC in socket.. new fuse ..

          whilst waiting, been round the board with meter .. looks like ZD101 is shorted . so another bit to get !

          A bit hard to see what ident is on there .. looks abit like Z208 ( or B ?) .. possibly a small p on the end ?

          Any clues ?


          thanks
          Chris
          Attached Files
          Last edited by ceedy; 11-17-2011, 03:01 PM.

          Comment

            #25
            Re: Old git need help Goodmans LCD TV dead ..

            Originally posted by ceedy View Post
            finally got all the Caps odds sizes for most shops round here..

            But all recapped . new IC in socket.. new fuse ..

            whilst waiting, been round the board with meter .. looks like ZD101 is shorted . so another bit to get !

            A bit hard to see what ident is on there .. looks abit like Z208 ( or B ?) .. possibly a small p on the end ?

            Any clues ?


            thanks
            Chris
            According to the schematic, ZD101 is a 1/2 watt 20 volt zener. Something like the 1N5250B should be suitable.

            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

              #26
              Re: Old git need help Goodmans LCD TV dead ..

              i' ve found one 4748 diode here at home , would seem its a 22v though??

              any good ? or i'm off to do a wee bit more shopping??

              ( never had this problem with parts when i was working )

              C.

              Comment

                #27
                Re: Old git need help Goodmans LCD TV dead ..

                Originally posted by ceedy View Post
                i' ve found one 4748 diode here at home , would seem its a 22v though??

                any good ? or i'm off to do a wee bit more shopping??

                ( never had this problem with parts when i was working )

                C.
                I'd suggest doing a little research. That zener is associated with the power FET in the SMPS. Off the top of my head, 22V is awfully close to 20V and 20V is a real handy number to pull out of the air. But the consequences of being wrong are pretty severe - lots of smoke and a smell of charred plastic.

                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

                  #28
                  Re: Old git need help Goodmans LCD TV dead ..

                  Any easy way to test the Mosfet while I'm waiting for bits .
                  Only got an old fluke 77.


                  C.

                  Comment

                    #29
                    Re: Old git need help Goodmans LCD TV dead ..

                    Originally posted by ceedy View Post
                    Any easy way to test the Mosfet while I'm waiting for bits .
                    Only got an old fluke 77.
                    For testing mosfets, I like to test for shorts. Measure the resistance between Gate-Source, Gate-Drain, and Drain-Source. Any reading under 30 ohms suggests it is shorted. If you are testing "in circuit", then remove the component and retest "out of circuit".

                    Others test mosfets like this ...

                    http://www.4qdtec.com/mostest.html

                    PS. I have an old Fluke 75 (purchased used).
                    --- begin sig file ---

                    If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                    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.

                    Please do not post inline and offsite as they slow down the loading of pages.

                    --- end sig file ---

                    Comment

                      #30
                      Re: Old git need help Goodmans LCD TV dead ..

                      Test off board the resistance between
                      Gate-Source = NC
                      Gate-Drain = 2.4 ohm
                      Drain-Source = NC

                      Just getting a IRF840 ( seems a reasonable equiv ?) to replace it

                      thanks

                      chris

                      Comment

                        #31
                        Re: Old git need help Goodmans LCD TV dead ..

                        Originally posted by ceedy View Post
                        Test off board the resistance between
                        Gate-Source = NC
                        Gate-Drain = 2.4 ohm
                        Drain-Source = NC

                        Just getting a IRF840 ( seems a reasonable equiv ?) to replace it

                        thanks

                        chris
                        Yes.

                        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

                          #32
                          Re: Old git need help Goodmans LCD TV dead ..

                          New mosFet new 20v zeners , new NCP 1200 , new fuse powered up .. flash-pop !!
                          Fuse gone. ?

                          Actually found another board on German Fleabay, but he won't send to me . I i've asked)

                          Chris

                          Comment

                            #33
                            Re: Old git need help Goodmans LCD TV dead ..

                            Originally posted by ceedy View Post
                            Actually found another board on German Fleabay, but he won't send to me . I i've asked)
                            Chris
                            If you really need it that badly, i could buy it and send it over to you if you pay for it + shipping.

                            I hate when you find the exact spare part you need, but the seller refuses to send it anywhere other than the country he lives in
                            Happened to me quite a few times already..

                            Comment

                              #34
                              Re: Old git need help Goodmans LCD TV dead ..

                              Originally posted by Scenic View Post
                              If you really need it that badly, i could buy it and send it over to you if you pay for it + shipping.

                              I hate when you find the exact spare part you need, but the seller refuses to send it anywhere other than the country he lives in
                              Happened to me quite a few times already..


                              Wow, that would be great ... would save me having to grow some more hair, just to pull out in frustration ?

                              the flea bay link is : http://www.ebay.de/itm/ws/eBayISAPI.dll?ViewItem&item=290583257669&ssPageName=ADME:X:AAQE:1123


                              thanks

                              Chris

                              Comment

                                #35
                                Re: Old git need help Goodmans LCD TV dead ..

                                19.90eur + 5eur shipping.
                                cheapest shipping option to the UK (?) is DHL w/o tracking (8.90eur).

                                so that would end up as roughly 34eur/46usd/30gbp total.

                                If you have paypal, that would be the easiest option. I would want the money beforehand though, as i don't want to spend ~25eur on a PSU board I don't need because you decide to fix your own one in the end (had something like this happen before.. that's what you get for trying to help sometimes..)

                                I'd say further details via PM?

                                edit: looking through that guys shop, it's kinda suprising this inverter/PSU board is as cheap as it is (especially considering it's supposedly new and unused). The other prices in his shop are pretty ridiculous, like 55eur for a 7" portable DVD player display, a 15" laptop LCD for 100 or a LCD inverter for 70eur
                                Last edited by Scenic; 11-24-2011, 08:29 AM.

                                Comment

                                  #36
                                  Re: Old git need help Goodmans LCD TV dead ..

                                  Great thanks, i'll hold off for a couple of days til next week.
                                  Just had to spend a lump on my car service/MOT .

                                  Also will give me a short while to have one last go at finding out the problem on this PSU is ..

                                  Speak soon thanks

                                  Chris

                                  PS any clue anyone ?

                                  Comment

                                    #37
                                    Re: Old git need help Goodmans LCD TV dead ..

                                    off work today, so having another go..

                                    R104 0.42 ohms is OC... not sure if I missed this first time .. or it was the last POP/flash?. redface:

                                    Tricky size , might have parallel up to get close ? got lots but nothing this low..

                                    LF104 coils = 1 ohm off board



                                    C.
                                    Attached Files

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