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    #1

    Eeprom and voltager regulators

    Hello if anyone has any guidance I have a main board from a 60" Sharp that has issues from a power surge and from what I un derstand it is the eeprom or the voltager regulators or all of the above. The board-Sharp DUNTKKF905FM04 (KF905, QPWBXF905WJZZ) Main Board. I'm opting to swap these components out with a programmed eeprom and looking up the votltagre regulators through Mouser or digi-key. I don't know which are which since they all are 8 legged IC's- can anyone tell me where exactrly the eeprom and voltage regulators are located on this board?
    Thanks-
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    #2
    Re: Eeprom and voltager regulators

    post the numbers from the ic's eeproms (flash) can have a number like 25Q64FVSIG for example, also the eeproms are usually a bit wider
    The one in yellow could be eeprom, red could be regulators
    see if this list helps
    Attached Files
    Last edited by R_J; 03-15-2017, 03:25 PM.

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      #3
      Re: Eeprom and voltager regulators

      Would need better pictures. eeprom have 24cxxxx. Upper left around coils should be dc/dc converters
      I assume no responsibility for any stupid suggestions I might post.

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        #4
        Re: Eeprom and voltager regulators

        Please post bigger resolution pictures and USE JPG for images with lots of colors, like your image. It will compress much better, which means you'll be able to upload higher resolution images.

        PNG is great for screenshots and images with lots of sharp lines and things you want to keep in the file, as the format is lossless.. but for this case it's not necessary.

        A lot of your ICs have 24CS in the name ... 24 usually tells you it's an eeprom (or some kind of memory chip, flash based eeprom, regular eeprom) , CS tells you (most likely) that it's CMOS technology based, S serial (meaning data can be read or written from/it using serial links like i2c , spi

        You can go at online distributors like Digikey or Newark / Farnell or Mouser and search using the product codes

        For example, for

        IC508 RH-iXD397WJQZS J IC S-24CS02AFJ-TB-G

        I simply went on Digikey : http://www.digikey.com/products/en and entered 24CS02AFJ and it found this: http://www.digikey.com/short/322n7b

        74HC .. 74 is a class of logic level chips, level shifters, muxers, adders, switches between 2 signals etc ex for IC2601 74HC2G66DP you can search for 74HC2G66 and you find out it's a dual switch chip : http://www.digikey.com/products/en/i...747?k=74HC2G66

        IC2703 .. NJM is prefix for NJR Corporation (a Japanese manufacturer), if you search for NJM4565 you get that it's an OPAMP : http://www.digikey.com/products/en?keywords=NJM4565

        and so on .. DA in front may tell you it's a DAC (digital to analogue converter)..

        Those MP2301 are probably switching regulators from Monolithic Power , same for RP130N331B chips which are made by Ricoh .. just take the most important part of those product codes and google it if you can't find the parts at the above distributors.

        Also see http://findchips.com for more obscure asian manufacturers of chips and parts found at fewer distributors.
        Last edited by mariushm; 03-15-2017, 10:27 PM.

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          #5
          Re: Eeprom and voltager regulators

          not sure of that number either but heres better pics
          Attached Files

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            #6
            Re: Eeprom and voltager regulators

            just dont know what is what is what but on a hunch I think the eeprom is the IC8401

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              #7
              Re: Eeprom and voltager regulators

              There are more than one eeprom and flash ic on this board, also a few regulator ic's I posted a list, look up the numbers and they will tell you what they are. Whats the model number of the tv I might have the service manual

              IC8401 IC MX25L3206EM2I-12G
              Last edited by R_J; 03-16-2017, 10:17 AM.

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                #8
                Re: Eeprom and voltager regulators

                Hi thanks I did look up a couple last night, one was on like a spreadsheet and a few columns over Eeprom was listed but I just didn't know how to read the page. The TV is an LC-60LE600U
                Thanks for your help

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                  #9
                  Re: Eeprom and voltager regulators

                  I'm also wondering if there's 2 Eeproms then then they both need to be programmed? and this tv is a victim of a power surge, I was told that the eeprom or the voltage Regulators or both would be need to be replaced but then again there are also some small IC's and some large ones with several legs on each side would those need to be replaced as well?
                  Thanks again-

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                    #10
                    Re: Eeprom and voltager regulators

                    I don't have the exact model. This is for a 70LE550U and this one uses a DKEYMF905FM06 main that looks similar. It should be possible to check the voltage regulator voltages, The board also uses eeproms for hdmi & vga 24cs02's I believe ic8401 (page16) is the main micro spi flash
                    Attached Files
                    Last edited by R_J; 03-16-2017, 01:59 PM.

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                      #11
                      Re: Eeprom and voltager regulators

                      Don't know if you will find programmed eeprom for your board
                      I assume no responsibility for any stupid suggestions I might post.

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                        #12
                        Re: Eeprom and voltager regulators

                        Hi yes thanks that board just like mine... will definitely look through the PDF when I get in

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                          #13
                          Re: Eeprom and voltager regulators

                          I did happen to supposedly find d one on ebay...

                          http://www.ebay.com/itm/272532648472...STRK:MEBIDX:IT

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