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    #41
    Re: Sceptre x22wg-Gamer 22" LCD

    As I'm rather new to this I'm not sure, but the page you linked said to choose aluminum. Is it assumed that's the category I will need as well?

    Comment

      #42
      Re: Sceptre x22wg-Gamer 22" LCD

      Originally posted by notajoo View Post
      As I'm rather new to this I'm not sure, but the page you linked said to choose aluminum. Is it assumed that's the category I will need as well?
      Just follow PlainBill's instructions to the letter. When you click on aluminum, it displays a whole list of choices/filters.
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        #43
        Re: Sceptre x22wg-Gamer 22" LCD

        Yeah I did all that, I just wanted to be sure it's aluminum since there were so many capacitor categories to choose from. Is it okay to mix and max different series between the medium and small capacitors? It seems they don't have the FM for the medium sized ones but only FC, and the only FC one they have for the small doesn't match the size of mine...

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          #44
          Re: Sceptre x22wg-Gamer 22" LCD

          Yes, aluminum. Yes, you can mix/match manufacturers and series.
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            #45
            Re: Sceptre x22wg-Gamer 22" LCD

            Originally posted by mockingbird View Post
            When the monitor is on and the CFLs are lit:
            Pin 1: 0.03
            Pin 48: 4.92~4.93

            When the CFLs turn off and the screen goes into standby:
            Pin 1: 0.01~0.02
            Pin 48: 4.94

            I have everything plugged in besides the data cable to the LCD panel inverter to take the measurements. Is this sufficient or should I instead plug that in, and attempt to draw a voltage off the CFL connectors while it is running and then test pins 1 and 48? And if so, what's your preferred method of drawing power from CFL connectors witout actual bulbs?
            The voltage at pin 48 is a problem. Reading the specs on this IC, the MAXIMUM allowable voltage on the IC is 3.6 volts. 5V is high enough to destroy the chip.

            There is no need to have the CCFLs hooked up. This chip must be powered whenever the monitor is plugged into an outlet. Recall, it must be active, and passing signal to the graphics processor even on standby.

            I would suggest identifying the source of power for this IC. U6, U7, and U8 are voltage regulators. What are the part numbers of those ICs?

            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.

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              #46
              Re: Sceptre x22wg-Gamer 22" LCD

              Originally posted by notajoo View Post
              Yeah I did all that, I just wanted to be sure it's aluminum since there were so many capacitor categories to choose from.
              If you want, list your original caps + uF + voltage + size + dimension, and your chosen replacements and we can verify for you.
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                #47
                Re: Sceptre x22wg-Gamer 22" LCD

                Originally posted by PlainBill View Post
                The voltage at pin 48 is a problem. Reading the specs on this IC, the MAXIMUM allowable voltage on the IC is 3.6 volts. 5V is high enough to destroy the chip.
                What are the chances the Pericom IC is still good, because if I would have to replace it, the pins are really tiny, and I'd need a heatgun to remove it, which I don't have, and then I'd have to remove all the caps which I just replaced and then reflow the replacement IC in the oven.

                U6: AIC 6F7L / 1117L
                U7: AIC 1084-33 / 0617 JL
                U8: "5BAL / 17-25L"

                I can't find the listing for U8.
                "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)

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                  #48
                  Re: Sceptre x22wg-Gamer 22" LCD

                  Originally posted by mockingbird View Post
                  What are the chances the Pericom IC is still good, because if I would have to replace it, the pins are really tiny, and I'd need a heatgun to remove it, which I don't have, and then I'd have to remove all the caps which I just replaced and then reflow the replacement IC in the oven.

                  U6: AIC 6F7L / 1117L
                  U7: AIC 1084-33 / 0617 JL
                  U8: "5BAL / 17-25L"

                  I can't find the listing for U8.
                  U8 is probably a 1117-25L voltage regulator with 2.5V output.
                  U7 looks to be a 3.3V output.
                  U6 don't know output.

                  Suggest you take your DMM and measure the voltage outputs of U6,7 & 8.

                  Comment

                    #49
                    Re: Sceptre x22wg-Gamer 22" LCD

                    Originally posted by retiredcaps View Post
                    If you want, list your original caps + uF + voltage + size + dimension, and your chosen replacements and we can verify for you.
                    Well that poses a slight problem atm. I can't seem to find anything here that measures mm besides a protractor and the way it's shaped won't allow me to measure the height of them from the board. I'm going to have to remove them first to measure them, but I can tell just from the lead spacing that the small one I found isn't the right one and it's the only one they have at the right uf and voltage in the FC series.

                    Now that I know I can look in other series for that one though I should be good. Once I get them all out and measured and find a full set to buy I will post everything though. I truly appreciate all of your help so far. The only thing I'm not really so sure about is the operating temp. I know mine say 105c on them but it has a min and max on that digi key site and i don't know how to find the minimum. I don't think the minimum is as important as the max though anyway.

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                      #50
                      Re: Sceptre x22wg-Gamer 22" LCD

                      Originally posted by notajoo View Post
                      I can't seem to find anything here that measures mm besides a protractor and the way it's shaped won't allow me to measure the height of them from the board.
                      Search for "printable mm ruler".
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                        #51
                        Re: Sceptre x22wg-Gamer 22" LCD

                        Wow, I can't believe I didn't think of that. I'll do that shortly and get it all typed out.

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                          #52
                          Re: Sceptre x22wg-Gamer 22" LCD

                          Originally posted by mockingbird View Post
                          What are the chances the Pericom IC is still good, because if I would have to replace it, the pins are really tiny, and I'd need a heatgun to remove it, which I don't have, and then I'd have to remove all the caps which I just replaced and then reflow the replacement IC in the oven.

                          U6: AIC 6F7L / 1117L
                          U7: AIC 1084-33 / 0617 JL
                          U8: "5BAL / 17-25L"

                          I can't find the listing for U8.
                          U6 is probably an adjustable regulator. Do as jetadm123 suggested, but measure the voltage on all three pins of each regulator. The tab on each regulator is electrically connected to the center pin.

                          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.

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                            #53
                            Re: Sceptre x22wg-Gamer 22" LCD

                            Originally posted by PlainBill View Post
                            U6 is probably an adjustable regulator. Do as jetadm123 suggested, but measure the voltage on all three pins of each regulator. The tab on each regulator is electrically connected to the center pin.
                            Ok, I measured the voltages. Here are the results:
                            Attached Files
                            "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

                              #54
                              Re: Sceptre x22wg-Gamer 22" LCD

                              Does the height include the height of the leads that go through the board also or is it just the height of the actual capacitor itself? On digi-key there are none that match the dimensions and specs of my capacitors. The one I was looking at earlier is 4mm bigger in height than my capacitor measures but matches in every other way, so that's why I was wondering.

                              Comment

                                #55
                                Re: Sceptre x22wg-Gamer 22" LCD

                                Originally posted by mockingbird View Post
                                Ok, I measured the voltages. Here are the results:
                                Good work, but Darn!!! I would have expected one of those voltages would be incorrect, they are all reasonable. I was hoping for a shorted regulator.

                                Check the resistance between pin 48 of the Pericom IC and the right hand pin of U7 (the one that is at 4.97 volts).

                                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

                                  #56
                                  Re: Sceptre x22wg-Gamer 22" LCD

                                  Originally posted by notajoo View Post
                                  Does the height include the height of the leads that go through the board also or is it just the height of the actual capacitor itself?
                                  The latter.

                                  The one I was looking at earlier is 4mm bigger in height than my capacitor measures but matches in every other way, so that's why I was wondering.
                                  Please list your original caps.

                                  edit: Note caps can be wider and taller than the original as long as it fits.
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                                    #57
                                    Re: Sceptre x22wg-Gamer 22" LCD

                                    The 8 medium sized caps are 8mm wide, 16mm tall, 470uf, 25v, 3.5mm lead space, 105c temp.

                                    The 1 small cap is 5mm wide, 11mm tall, 33uf, 35v, 3mm lead, 105c temp.

                                    I've looked on both sites you listed and can't seem to find either one that has exact matches for them. Digi key's closest height is 20mm on the medium sized equivalent and that will be cutting it way too close for my taste. They would practically be touching the case. I did find on Mouser one that's almost exact in the panasonic FR series, but 15mm height instead of 16mm. Even if I could go smaller than the original though which I'm not sure of, they are on backorder and I wouldn't get them for about a month. Not to mention Mouser's shipping rates are pretty ridiculous.

                                    As for the smaller cap, digi key doesn't even have a 3mm lead spacing option to choose and even if I don't put that in, there isn't one that comes up. I'm guessing the lead spacing has to be exact so that's a no-go on the smaller one. On mouser you can't even search for LS, but when I put in the other specs every one that shows LS in the description is 2, 2.5, or 3.5 mm or higher, so a no-go there as well...

                                    All in all it's not looking very optimistic. I'm starting to think I should just contact the person selling the ebay kit and make sure they have exactly what I need in a good brand and if so, order from them instead. Anywhere else I might look or am I just doing something horribly wrong in my searching somewhere?

                                    Comment

                                      #58
                                      Re: Sceptre x22wg-Gamer 22" LCD

                                      Originally posted by notajoo View Post
                                      I did find on Mouser one that's almost exact in the panasonic FR series, but 15mm height instead of 16mm.

                                      I'm guessing the lead spacing has to be exact so that's a no-go on the smaller one.

                                      I'm starting to think I should just contact the person selling the ebay kit and make sure they have exactly what I need in a good brand and if so, order from them instead.
                                      The Panasonic FR would match ideally with the 470uF 25V 8.00mmx16.00mm cap, but as you found out it is on backorder.

                                      Lead spacing does not have to be exact. Caps don't have to fit flush against the pcb unless height is a problem.

                                      If you go the ebay route, make sure to ask for the dimensions of the caps. Most ebay sellers buy their caps from the same place (digikey, mouser), but they buy in larger quantities to get the price discount.
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                                        #59
                                        Re: Sceptre x22wg-Gamer 22" LCD

                                        Originally posted by retiredcaps View Post
                                        Lead spacing does not have to be exact. Caps don't have to fit flush against the pcb unless height is a problem.
                                        So since the smaller one has plenty of height to play with, a 2.5 or 3.5 LS would be okay to use as long as the uf and v and the other dimensions match?

                                        I did assume that the Ebay sellers did that, but since I can't seem to find anything compatible in stock, if they have it ready to ship I would rather spend a few dollars more and go ahead and get it than to wait a month or more. I will definitely get detailed specs though before I go that route since they don't have it listed on the auction page. It just says it's a full capacitor replacement for the same board and lists the uf and temps. As long as I can be assured that the caps are from a reputable brand and matching specs then I think that's the route I'm going to have to go.

                                        Comment

                                          #60
                                          Re: Sceptre x22wg-Gamer 22" LCD

                                          Originally posted by notajoo View Post
                                          So since the smaller one has plenty of height to play with, a 2.5 or 3.5 LS would be okay to use as long as the uf and v and the other dimensions match?
                                          Yes. I have seen small caps not sit flush to the board. As an example, here is one board I have.

                                          https://www.badcaps.net/forum/attach...1&d=1275510343

                                          See how c102, c807, and c114 all sit off board? And this is from the factory.

                                          Note c814 and c831 sit flush (again from the factory).

                                          You will see this on other boards as well.

                                          edit: more examples (see how small cap sits off the board - not flush - all photos from De3rcr - excellent clear focused pics)

                                          https://www.badcaps.net/forum/attach...3&d=1292186500

                                          https://www.badcaps.net/forum/attach...0&d=1290283049

                                          https://www.badcaps.net/forum/attach...0&d=1289502289
                                          Last edited by retiredcaps; 12-20-2010, 01:12 PM.
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