Sharp LC-40LE810UN question

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  • tibimakai
    Badcaps Legend
    • Jan 2012
    • 3680
    • USA

    #161
    Re: Sharp LC-40LE810UN question

    Thank you.
    So, there is an error stored on the EEPROM and that error doesn't let the TV to turn on?
    Why that error came up in the first place, what caused it?
    I see on the net that these chips can be cleared with a paper clip, what is your thoughts about that? Between pin 3 and 6.

    Comment

    • olegi
      Senior Member
      • Jun 2012
      • 63
      • Canada

      #162
      Re: Sharp LC-40LE810UN question

      Don't do shorting pins .Can you desolder that chip .Power up with removed eeprom chip.Tell what is the blinking code.What i think after a few unsuccess power ups (errors ) , firmware write code in this chip to prevent from further power on(may be for safety )

      Comment

      • tibimakai
        Badcaps Legend
        • Jan 2012
        • 3680
        • USA

        #163
        Re: Sharp LC-40LE810UN question

        Ok, I have removed it and it's the same code.

        Comment

        • olegi
          Senior Member
          • Jun 2012
          • 63
          • Canada

          #164
          Re: Sharp LC-40LE810UN question

          Ok don't put it back .Check this .According to service manual:
          Power PWB failure Flashes 2 times (twice slow) after that
          Flashes 1 times Power supply error 1 (*2) AC_DET error
          Flashes 2 times Power supply error 2 (*2) UR+13V error
          Flashes 3 times Power supply error 3 (*2) D3.3V error
          Flashes 5 times Panel power supply error

          PANEL_POW Panel 12V failure Flashes fast 5 times
          DET_PNL12V(35pin) failure (L). Panel power is not applied.
          Detection is started after turning on the panel power and
          receiving command; the power is turned off by polling.
          Last edited by olegi; 10-07-2012, 07:46 AM.

          Comment

          • tibimakai
            Badcaps Legend
            • Jan 2012
            • 3680
            • USA

            #165
            Re: Sharp LC-40LE810UN question

            I think that the easiest for me it would be to just purchase a new one. The question is which one, on Digikey there are a lot of choices.

            Comment

            • olegi
              Senior Member
              • Jun 2012
              • 63
              • Canada

              #166
              Re: Sharp LC-40LE810UN question

              Basically this error means (with cleared , removed eeprom)if you are sure that your power supply board is OK ,you have burn led diode in backlight.I check from your post #1 ,there is burnt capacitor in red circle.Can you confirm?
              Attached Files

              Comment

              • tibimakai
                Badcaps Legend
                • Jan 2012
                • 3680
                • USA

                #167
                Re: Sharp LC-40LE810UN question

                I don't have backlight. I have purchased a power suppliy from partstore.com and it showed the same error code with it. I have to check on the capacitor, I haven't noticed it.

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #168
                  Re: Sharp LC-40LE810UN question

                  We went over that - it's a surge protection device, not a problem or the fuse would blow.

                  Interesting if an LED in the backlight is dead. Should be easy enough to replace it or disable it (barely noticeable) - but it seems to be a common fault, seen a few sets like that here with dodgy backlight connections or open LEDs.

                  Just want to get my hands on one .
                  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

                  • olegi
                    Senior Member
                    • Jun 2012
                    • 63
                    • Canada

                    #169
                    Re: Sharp LC-40LE810UN question

                    Originally posted by tom66
                    We went over that - it's a surge protection device, not a problem or the fuse would blow.

                    Interesting if an LED in the backlight is dead. Should be easy enough to replace it or disable it (barely noticeable) - but it seems to be a common fault, seen a few sets like that here with dodgy backlight connections or open LEDs.

                    Just want to get my hands on one .
                    I use the same picture from post 1 and i was refering for second circle bottom .You are right ,it is like open LEDs(backlight)
                    Last edited by olegi; 10-07-2012, 02:58 PM.

                    Comment

                    • olegi
                      Senior Member
                      • Jun 2012
                      • 63
                      • Canada

                      #170
                      Re: Sharp LC-40LE810UN question

                      Originally posted by tibimakai
                      I don't have backlight. I have purchased a power suppliy from partstore.com and it showed the same error code with it. I have to check on the capacitor, I haven't noticed it.
                      Your backlight is made from LEDs. In this case check for open LEDs on backlight.Do not buy new eeprom for now(you have to remove the error )

                      Comment

                      • tibimakai
                        Badcaps Legend
                        • Jan 2012
                        • 3680
                        • USA

                        #171
                        Re: Sharp LC-40LE810UN question

                        I have never repaired an LED TV which required work on the backlight. How do I know which one is bad?

                        Comment

                        • olegi
                          Senior Member
                          • Jun 2012
                          • 63
                          • Canada

                          #172
                          Re: Sharp LC-40LE810UN question

                          This power should have 2 pair of LEDs divided in 2 section total 4 wires .Can you check with voltmeter what you have on connector LED_DRV1+ and - as well LED_DRV2 + and -.You have to attach voltmeter before you power the tv,then power up and see what is the reading from each pin. Post results.

                          Comment

                          • tibimakai
                            Badcaps Legend
                            • Jan 2012
                            • 3680
                            • USA

                            #173
                            Re: Sharp LC-40LE810UN question

                            Thank you for helping me.
                            It's to late now, I will measure it tomorrow.
                            I was wondering about this startup on LED TVs, they don't have the 2 sec to black. as LCD TVs with CCFl tubes?

                            Comment

                            • olegi
                              Senior Member
                              • Jun 2012
                              • 63
                              • Canada

                              #174
                              Re: Sharp LC-40LE810UN question

                              This Tv, when you press power on button it is dark ~ 5sec then lit up.

                              Comment

                              • olegi
                                Senior Member
                                • Jun 2012
                                • 63
                                • Canada

                                #175
                                Re: Sharp LC-40LE810UN question

                                I read this guide 2 seconds to black
                                (https://www.badcaps.net/forum/showthread.php?t=10419) and your tv it is bit differant

                                Comment

                                • tibimakai
                                  Badcaps Legend
                                  • Jan 2012
                                  • 3680
                                  • USA

                                  #176
                                  Re: Sharp LC-40LE810UN question

                                  I have measured the LED voltage, early before I left to work and measured from the secondary ground and I'm getting on all the pins 0.0019V.
                                  From primary ground I'm getting 28.6-28.8V.
                                  But I think that I have to measure from the secondary.
                                  I have tried even without the LEDs and I'm getting the same voltage.
                                  When I will be home, I will try with the replacement board, to see if I'm getting the same voltage.
                                  I guess these voltages should be DC voltages, since the LEDs are diodes.

                                  Comment

                                  • olegi
                                    Senior Member
                                    • Jun 2012
                                    • 63
                                    • Canada

                                    #177
                                    Re: Sharp LC-40LE810UN question

                                    Ok. All cables has to be attached (specially those for LEDs led_drv1 and led_drv2) Power up tv,wait ~ 10 sec. Voltmeter has to be attached (neg to ground) ,with positive probe you have to check each pin on LED_DRV (1 an2 , +and -).DC voltage should be ~ +95v -95v depend of different factors .If you have ~0v,then you have to manually turn ON backlight inverter .By looking on yours particular board optocoupler PC 7702,turn backlight On.You have to short with INSULATED scrwdriver ,PRIMARY side of optocoupler as is shown on the picture (don`t short any of the other optocouplers,do not mesure primary side circuit HI VOLTAGE HIGN FREQ),then measure readings.Post result.
                                    Attached Files
                                    Last edited by olegi; 10-08-2012, 09:28 AM.

                                    Comment

                                    • tibimakai
                                      Badcaps Legend
                                      • Jan 2012
                                      • 3680
                                      • USA

                                      #178
                                      Re: Sharp LC-40LE810UN question

                                      I have measured the voltages and there is not much change. On the upper connector I had +0.009V on both pins and on the bottom connector I had -0.009V on both connectors.
                                      I have tried the replacement board also, and it measured exactly the same.
                                      When I shorted the opto, the bulb on the short tester outlet lit up and since then I don't have any voltages and no LED light on the front of the TV.
                                      The only voltage that I have is the 170V on the main caps.

                                      Comment

                                      • budm
                                        Badcaps Legend
                                        • Feb 2010
                                        • 40746
                                        • USA

                                        #179
                                        Re: Sharp LC-40LE810UN question

                                        That opto may be for the voltage regulator feedback, need to find out if that is the correct opto. Need to find the diagram for this board.
                                        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

                                          #180
                                          Re: Sharp LC-40LE810UN question

                                          I couldn't find the diagram. The SM from elektrotanya doesn't show the power supply.
                                          Now I have bigger issues, I have to find the bad component.

                                          Bud, could you please look at the Samsung 2333 please?

                                          Comment

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