Sharp LC-40LE810UN question

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  • tibimakai
    Badcaps Legend
    • Jan 2012
    • 3680
    • USA

    #141
    Re: Sharp LC-40LE810UN question

    What should I do next? I don't see conventional VDOs on the mainboard to check.
    Since the replacement power supply acts the same way as the original board, I assume that it's not the power source is the problem.
    I don't understand why there is no voltage at the connector(only 4.7V stby).
    Special order mainboard at partstore is $155.

    Comment

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #142
      Re: Sharp LC-40LE810UN question

      You are not getting PSON so why did you replace the power supply? Sorry - missed this thread.
      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

      Comment

      • tibimakai
        Badcaps Legend
        • Jan 2012
        • 3680
        • USA

        #143
        Re: Sharp LC-40LE810UN question

        I got frustrated because sometimes I had voltages and sometimes were all gone.
        Hopefully they will take it back.

        Comment

        • tibimakai
          Badcaps Legend
          • Jan 2012
          • 3680
          • USA

          #144
          Re: Sharp LC-40LE810UN question

          With the original board back in the TV, I have measured the voltages before the feedback kicks in.
          This is what I'm getting:
          Pin#--Designation---Volts
          1-----13.2V-------= 13.02V
          2-----13.2V-------= 13.03V
          3-----SGND-------= 0
          4-----SGND-------= 0
          5-----SGND-------= 0
          6-----SGND-------= 0
          7-----SGND-------= 0
          8-----SGND-------= 0
          9-----AC-DET-----= 3.12V
          10----PS-ON------= 3.03V
          11----BU5V-------= 5.017V
          12----PNL-POW---= 0.12V
          So, the mainboard it's OK too?
          When I turn on the TV there is a very-very tiny buzz.
          Can I measure the LED transformer outputs? They should be like 90V or more?

          Comment

          • olegi
            Senior Member
            • Jun 2012
            • 63
            • Canada

            #145
            Re: Sharp LC-40LE810UN question

            Hi tibimakai. Do you still have this blinking code in front of tv, if it is yes what is the sequence.

            Comment

            • tibimakai
              Badcaps Legend
              • Jan 2012
              • 3680
              • USA

              #146
              Re: Sharp LC-40LE810UN question

              2 slow and 5 fast.

              Comment

              • olegi
                Senior Member
                • Jun 2012
                • 63
                • Canada

                #147
                Re: Sharp LC-40LE810UN question

                On your main board there is eprom (chip finish with 04) on the backside of the board You have to erase it (blank it).Inside this chip is store a lot errors . you can find this chip on picture on post 129 on the bottom .I had 52 " sharp same blinking code .After erase this
                chip ,tv is working again .Don't forget to hit factory settings. Hope this helps
                Post your results.
                Last edited by olegi; 10-05-2012, 08:45 PM.

                Comment

                • tibimakai
                  Badcaps Legend
                  • Jan 2012
                  • 3680
                  • USA

                  #148
                  Re: Sharp LC-40LE810UN question

                  How you do that, since the Tv doesn't turn on?

                  Comment

                  • olegi
                    Senior Member
                    • Jun 2012
                    • 63
                    • Canada

                    #149
                    Re: Sharp LC-40LE810UN question

                    You have to desolder this chip,erase it with eprom programmer and soldered back.You can use brand new chip too.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #150
                      Re: Sharp LC-40LE810UN question

                      Does this chip also store firmware? I am trying to understand how it works if it is blank.
                      Never stop learning
                      Basic LCD TV and Monitor troubleshooting guides.
                      http://www.badcaps.net/forum/showthr...956#post305956

                      Voltage Regulator (LDO) testing:
                      http://www.badcaps.net/forum/showthr...999#post300999

                      Inverter testing using old CFL:
                      http://www.badcaps.net/forum/showthr...er+testing+cfl

                      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                      http://s807.photobucket.com/user/budm/library/

                      TV Factory reset codes listing:
                      http://www.badcaps.net/forum/showthread.php?t=24809

                      Comment

                      • tibimakai
                        Badcaps Legend
                        • Jan 2012
                        • 3680
                        • USA

                        #151
                        Re: Sharp LC-40LE810UN question

                        I don't have a programmer.

                        Comment

                        • olegi
                          Senior Member
                          • Jun 2012
                          • 63
                          • Canada

                          #152
                          Re: Sharp LC-40LE810UN question

                          In this particular board you have tree eproms .First with firmware is on top side on the board (left side on heat sink on post 129 ic3401 if i see correct from picture) Second for settings (channels , brightness ...) it is 64kbit .
                          Third is it 4kbit .That chip you have to erase.For programmer go to google and search for ( 24c04 programmer )
                          Last edited by olegi; 10-05-2012, 10:06 PM.

                          Comment

                          • budm
                            Badcaps Legend
                            • Feb 2010
                            • 40746
                            • USA

                            #153
                            Re: Sharp LC-40LE810UN question

                            Darn, they have to make it so complicated. Why can't they put a simple clear button to clear out the garbage from the chip, but then they cannot sell more TV, I guess.
                            Never stop learning
                            Basic LCD TV and Monitor troubleshooting guides.
                            http://www.badcaps.net/forum/showthr...956#post305956

                            Voltage Regulator (LDO) testing:
                            http://www.badcaps.net/forum/showthr...999#post300999

                            Inverter testing using old CFL:
                            http://www.badcaps.net/forum/showthr...er+testing+cfl

                            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                            http://s807.photobucket.com/user/budm/library/

                            TV Factory reset codes listing:
                            http://www.badcaps.net/forum/showthread.php?t=24809

                            Comment

                            • olegi
                              Senior Member
                              • Jun 2012
                              • 63
                              • Canada

                              #154
                              Re: Sharp LC-40LE810UN question

                              Consider your tv it is like computer.

                              Comment

                              • tibimakai
                                Badcaps Legend
                                • Jan 2012
                                • 3680
                                • USA

                                #155
                                Re: Sharp LC-40LE810UN question

                                I don't understand which IC I have to replace. No matter which one, it.doesn't look easy at all.

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK

                                  #156
                                  Re: Sharp LC-40LE810UN question

                                  Originally posted by budm
                                  Darn, they have to make it so complicated. Why can't they put a simple clear button to clear out the garbage from the chip, but then they cannot sell more TV, I guess.
                                  Because then you need a microcontroller or some processor to erase the chip - which adds expense - and TVs are really slim margin so where-ever cost can be cut...
                                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                  Comment

                                  • tibimakai
                                    Badcaps Legend
                                    • Jan 2012
                                    • 3680
                                    • USA

                                    #157
                                    Re: Sharp LC-40LE810UN question

                                    Which one is that chip?

                                    Comment

                                    • tom66
                                      EVs Rule
                                      • Apr 2011
                                      • 32560
                                      • UK

                                      #158
                                      Re: Sharp LC-40LE810UN question

                                      ^Reply to budm on why there's no reset button not relevant to your problem.
                                      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                      Comment

                                      • tibimakai
                                        Badcaps Legend
                                        • Jan 2012
                                        • 3680
                                        • USA

                                        #159
                                        Re: Sharp LC-40LE810UN question

                                        I understand, but I'm having a hard time figuring out which one is that eeprom chip.

                                        Comment

                                        • olegi
                                          Senior Member
                                          • Jun 2012
                                          • 63
                                          • Canada

                                          #160
                                          Re: Sharp LC-40LE810UN question

                                          Hi tibimakai, i check today and that chip is IC2004 and is it 24c02 not 24c04.You can find it on the back on the board in red circle .That was in my tv before i erased.Hope this helps.
                                          Attached Files
                                          Last edited by olegi; 10-06-2012, 06:33 PM.

                                          Comment

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