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intergrated tcon board ic rt6939 vestel polaroid p55up0277a

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    #41
    Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

    Originally posted by jimbofz View Post
    sorry i do not have a CH341A ,
    should i put it on my Christmas list?
    its cheap and useful,
    about U11 check first all V. on its pins , then try freeze it or heat before you turn on the set.

    Comment


      #42
      Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

      Originally posted by jimbofz View Post
      sorry been away from pc .
      does the last post from arizanotlari contain the correct firmware for my tv?
      if yes can i install this via usb ,
      considering i have no on screen graphics to enter correct menu
      my panel type:ves550qnds 2d u12
      Try it.
      https://www.badcaps.net

      Comment


        #43
        Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

        Originally posted by Diah View Post
        its cheap and useful,
        about U11 check first all V. on its pins , then try freeze it or heat before you turn on the set.
        heres the voltages on U11 :
        1 3.38v, 2 3.38v, 3 3.4v ,4 0v,
        5 ov, 6 3.38v 7 3.26v, 8 3.26v
        no change with heat or freeze before turning on,tried a few times ,no change
        Last edited by jimbofz; 11-17-2020, 05:49 AM.

        Comment


          #44
          Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

          Originally posted by jimbofz View Post
          heres the voltages on U11 :
          1 3.38v, 2 3.38v, 3 3.4v ,4 0v,
          5 ov, 6 3.38v 7 3.26v, 8 3.26v
          no change with heat or freeze before turning on,tried a few times ,no change
          compare the V. with U13

          Comment


            #45
            Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

            heres voltages from u13:
            1 3.25v, 2 3.2v, 3 0v, 4 0v,
            5 0v, 6 0v, 7 3.1v, 8 3.1v .
            so no volts on pin 3 and pin6 compared to u11

            Comment


              #46
              Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

              Originally posted by jimbofz View Post
              heres voltages from u13:
              1 3.25v, 2 3.2v, 3 0v, 4 0v,
              5 0v, 6 0v, 7 3.1v, 8 3.1v .
              so no volts on pin 3 and pin6 compared to u11
              are you sure the info you wrote on yours photo below are 100% correct, both SPI had same No.25L1606E ?

              try the firmware from Arıza Notları
              while the tv ON, plug it from wall socket.. put all files on usb drive and insert it at any usb ports, press OK on the RC and keep pressing while you plug the tv in wall socket again... hope your screen will show progress

              Comment


                #47
                Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                do the 3 files have to be in a folder,
                or do i load them on to usb
                as 3 separate items?
                ive double checked the voltages on U11 and U13
                and as you say i would expect them to be the same?

                Comment


                  #48
                  Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                  Originally posted by jimbofz View Post
                  do the 3 files have to be in a folder,
                  or do i load them on to usb
                  as 3 separate items?
                  ive double checked the voltages on U11 and U13
                  and as you say i would expect them to be the same?
                  all files on the root of the usb drive

                  about SPI.. my bad english.. i am asking if the both SPI lable are the same as you wrote 25L1606E on the paper

                  Comment


                    #49
                    Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                    thanks your english is very good much better than my german
                    both SPI are the same 25L1606E.
                    i have downloaded and extracted the files ,
                    do they have to be in a folder or do i create a folder ? put the files in then send to usb?

                    Comment


                      #50
                      Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                      Originally posted by jimbofz View Post
                      thanks your english is very good much better than my german
                      both SPI are the same 25L1606E.
                      i have downloaded and extracted the files ,
                      do they have to be in a folder or do i create a folder ? put the files in then send to usb?
                      i did answer before... no folder just all files copy them on the usb root LOL

                      Comment


                        #51
                        Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                        Originally posted by jimbofz View Post
                        do the 3 files have to be in a folder,
                        or do i load them on to usb
                        as 3 separate items?
                        ive double checked the voltages on U11 and U13
                        and as you say i would expect them to be the same?
                        Extract 4 files to USB (file sytem of usb drive must be fat32)
                        Plug USB Drive to USB 1 port of tv.
                        Press and hold OK button from rc and plug in ac cable.
                        Hold OK button until led blinking fast.
                        https://www.badcaps.net

                        Comment


                          #52
                          Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                          Originally posted by arizanotlari View Post
                          Extract 4 files to USB (file sytem of usb drive must be fat32)
                          Plug USB Drive to USB 1 port of tv.
                          Press and hold OK button from rc and plug in ac cable.
                          Hold OK button until led blinking fast.
                          theres 3 usb skts, one is blue usb3.

                          the other 2 are not marked
                          looked on back cover and on pcb
                          i tried the usb next to the scart skt and followed your instructions
                          holding down OK button waited 5 minutes no fast blinking
                          so powered off and tried the side usb ,no change
                          only now when i removed the usb and powered on i cant get sound from scart i/p which i had before so now im confused
                          just looked on cct there labelled side usb, back usb, and usb3 which is the correct one?
                          Last edited by jimbofz; 11-17-2020, 01:35 PM.

                          Comment


                            #53
                            Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                            Usb 1 is cn16.
                            Unplug lvds cable and try again.
                            https://www.badcaps.net

                            Comment


                              #54
                              Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                              Originally posted by arizanotlari View Post
                              Usb 1 is cn16.
                              Unplug lvds cable and try again.
                              ok tried with lvds cable disconected
                              using the usb next to the scart skt which is cn16
                              when fast blinking pauses
                              i remove power
                              reinstall the lvds and unplug usb
                              tv will come in and out of sby as before,
                              but cant get any sound via scart i/p
                              and pic just the same as before no osg or pic info

                              Comment


                                #55
                                Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                                ok back to basics when the main board is working normally
                                it provides a enable voltage to turn on the dc/dc converter ics
                                on the intergrated tcon board .
                                now after trying to install the f/w
                                we still have no enable voltage on pin 22 or 30 of the lvds
                                neither of these pins are s/c or low resistance to deck .
                                if i could find out which is the enable pin in the two ics RT6939 AND RT6935 these ics are made by RICHTEC and their website has info on hundreds of ics that they make except the ones used in this vestel panel.
                                i may have to wait until i can compare with a working vestel

                                Comment


                                  #56
                                  Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                                  After upgrade led must go off.
                                  If tv going to standby mode chassis is not working.
                                  You write u13 voltages before, this voltage values showing tv is standby mode.
                                  first make sure the tv is working.
                                  https://www.badcaps.net

                                  Comment


                                    #57
                                    Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                                    Originally posted by arizanotlari View Post
                                    After upgrade led must go off.
                                    If tv going to standby mode chassis is not working.
                                    You write u13 voltages before, this voltage values showing tv is standby mode.
                                    first make sure the tv is working.
                                    i know the voltage is strange ,
                                    i dont understand why ,
                                    but tv was definately on when voltages were measured ,
                                    as the backlight was lit and i had sound via scart i/p.
                                    but i now have no sound ?
                                    i will try the upgrade f.w again tomorrow

                                    Comment


                                      #58
                                      Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                                      Originally posted by jimbofz View Post
                                      i know the voltage is strange ,
                                      i dont understand why ,
                                      but tv was definately on when voltages were measured ,
                                      as the backlight was lit and i had sound via scart i/p.
                                      but i now have no sound ?
                                      i will try the upgrade f.w again tomorrow
                                      tried again f/w update when fast blinking finally stops waited until backlight came on and red led went out.
                                      them unplugged mains ,removed usb stick and powered up.
                                      tv comes on as before (dark blue image backlight on)
                                      but now with no sound via scart i/p
                                      so i checked the voltages on u13 again
                                      and pin 3 has no volts ,on cct its shown as write protection .
                                      pin 6 also has no volts shown on cct as sclk clock
                                      any ideas ? should i try to buy a main board ?

                                      Comment


                                        #59
                                        Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                                        Originally posted by jimbofz View Post
                                        tried again f/w update when fast blinking finally stops waited until backlight came on and red led went out.
                                        them unplugged mains ,removed usb stick and powered up.
                                        tv comes on as before (dark blue image backlight on)
                                        but now with no sound via scart i/p
                                        so i checked the voltages on u13 again
                                        and pin 3 has no volts ,on cct its shown as write protection .
                                        pin 6 also has no volts shown on cct as sclk clock
                                        any ideas ? should i try to buy a main board ?
                                        since you dont have programmer tools so nothings you can do.. , i would encourage you buy replacement MB as it show at your country Ebay cheap so you can invest at it..

                                        Comment


                                          #60
                                          Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

                                          Can you add photos of screen.
                                          https://www.badcaps.net

                                          Comment

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